Browse by Current Cardiff authors

2021. Incorporating gate-lag effects into the Cardiff Behavioural Model. Presented at: 50th European Microwave Conference (EuMC 2020), Utrecht, Netherlands, 12-14 January 2021. 2020 50th European Microwave Conference (EuMC). IEEE, pp. 684-687. 10.23919/EuMC48046.2021.9338185

Alimohammadi, Yashar, Kuwata, Eigo, Liu, Xuan, Husseini, Thoalfukar, Bell, James

, Wu, Lei, Tasker, Paul

2020. Pulse profiling active load pull measurements. Presented at: IEEE/MTT-S International Microwave Symposium (IMS 2020), Los Angeles, CA, USA, 4-6 August 2020. 2020 IEEE/MTT-S International Microwave Symposium (IMS). IEEE, pp. 759-762. 10.1109/IMS30576.2020.9223989

Zhao, Zhe, Martin, Tracey A.

, Cai, Shuo, Ye, Lin

, Davies, Eleri, Mansel, Robert E.

and Jiang, Wen G.

2020. Abstract P3-01-18: Kinase D interacting substrate 220 (Kidins220) and disease progression of breast cancer, the role of heat shock protein90 (HSP90). Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019. Cancer Research. , vol.80 (4, Sup) American Association for Cancer Research, P3-01-18. 10.1158/1538-7445.SABCS19-P3-01-18

Zhao, Zhe, Martin, Tracey A.

, Cai, Shuo, Ye, Lin

, Mokbel, Kefah, Davies, Eleri, Mansel, Robert E.

and Jiang, Wen G.

2020. Abstract P2-07-01: Kidins220 (kinase D interacting substrate 220) has a connection with neutrotrophic related factors, BDNF and NGF, in human breast cancer. Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019. Cancer Research. , vol.80 (4, Sup) P2-07-01. 10.1158/1538-7445.SABCS19-P2-07-01

Chaudhary, Muhammad Akmal, Yusoff, Zubaida, Lees, Jonathan

and Tasker, Paul

2019. Auxiliary envelope tracking focused investigations of a 10W GaN HEMTs device. Presented at: 3rd International Conference on Circuits, Systems and Devices (ICCSD), Chengdu, China, 23-25 Aug 2017. Proceedings of 3rd International Conference on Circuits, Systems and Devices (ICCSD). IEEE, p. 92. 10.1109/ICCSD.2019.8843202

You, Fei and Benedikt, Johannes

2019. An optimized-load-impedance calculation and mining method based on i-v curves: Using broadband class-e power amplifier as example. IEEE Transactions on Industrial Electronics 66 (7) , pp. 5254-5263. 10.1109/TIE.2018.2868020

Al-Rawachy, Azam, Husseini, Thoalfukar, Benedikt, Johannes

and Bell, James

2019. Cardiff behavioural model analysis using a two-tone stimulus. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Orlando, FL, USA, 20-23 January 2019. 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE, pp. 5-8. 10.1109/PAWR.2019.8708726

Syed Anera, Syed M. H., Husseini, Thoalfukar, Alsahali, Sattam, Bell, James J.

, Quaglia, Roberto

, Kermalli, Munawar, Tasker, Paul J.

2019. High-efficiency broadband PA design based on continuous Class-F mode with compression. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019. MTT-S International Microwave Symposium (IMS). IEEE, pp. 698-701. 10.1109/MWSYM.2019.8700767

Al-Rawachy, Azam, Husseini, Thoalfukar, Benedikt, Johannes

, Bell, James

and Tasker, Paul

2019. Behavioural model extraction using novel multitone active load-pull. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019. MTT-S International Microwave Symposium (IMS). IEEE, pp. 196-199. 10.1109/MWSYM.2019.8700779

Husseini, Thoalfukar, Al-Rawachy, Azam, Benedikt, Johannes

, Bell, James

and Tasker, Paul

2019. Global behavioural model generation using coefficients interpolation. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019. -.

Liu, Zhiqing, Wu, Yunqiu, Zhao, Chenxi, Benedikt, Johannes

and Kang, Kai 2018. A 5-Gb/s 66 dB CMOS variable-gain amplifier with reconfigurable DC-offset cancellation for multi-standard applications. IEEE Access 6 , pp. 54139-54146. 10.1109/ACCESS.2018.2867227

Husseini, Thoalfukar, Al-Rawachy, Azam, Benedikt, Johannes

, Bel, James and Tasker, Paul

2018. Automating the accurate extraction and verification of the Cardiff Model via the direct measurement of load-pull power contours. Presented at: 2018 IEEE/MTT-S International Microwave Symposium - IMS, Philadelphia, PA, USA, 10-15 June 2018. 2018 IEEE/MTT-S International Microwave Symposium - IMS. IEEE, p. 544. 10.1109/MWSYM.2018.8439581

Husseini, Thoalfukar, Al-Rawachy, Azam, Anera, Syed S., Bell, James

2018. On the effective modeling of the test-set non-linearity. Presented at: 2018 91st ARFTG Microwave Measurement Conference (ARFTG), Philadelphia, PA, USA, 15 June 2018. 2018 91st ARFTG Microwave Measurement Conference (ARFTG). IEEE, 10.1109/ARFTG.2018.8423832

Chaudhary, Muhammad Akmal, Memon, Zulfiqar Ali, Yusoff, Zubaida, Lees, Jonathan

and Tasker, Paul

2018. Optimization of out-of-band impedance environment for linearity improvements of microwave power transistors. Presented at: 2018 5th International Conference on Electrical and Electronic Engineering (ICEEE), Istanbul, Turkey, 3-5 May 2018. 2018 5th International Conference on Electrical and Electronic Engineering (ICEEE). IEEE, pp. 219-223. 10.1109/ICEEE2.2018.8391334

Chaudhary, Muhammad Akmal, Memon, Zulfiqar Ali, Lees, Jonathan

and Tasker, Paul

2018. Multitone measurement system for linearity investigations of microwave devices. Presented at: International Multi-Topic Conference (Inmic), Lahore, Pakistan, 24-26 Nov 2017. International Multi-Topic Conference (Inmic). IEEE, 10.1109/INMIC.2017.8289455

Ji, Songkun, Hong, Yanhun, Spencer, Paul S., Benedikt, Johannes

and Davies, Iwan 2017. Broad tunable photonic microwave source using a single-mode VCSEL subject to parallel optical injection. Presented at: Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 25-29 June 2017. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, p. 1. 10.1109/CLEOE-EQEC.2017.8086553

Song, Yexi, Wu, Yunqiu, Yang, Jie, Tian, Yin, Tong, Wei, Chen, Yijun, Wang, Cetian, Tang, Xiaohong, Benedikt, Johannes

and Kang, Kai 2017. A compact ka-band active integrated antenna with a GaAs amplifier in a ceramic package. IEEE Antennas and Wireless Propagation Letters 16 , pp. 2416-2419. 10.1109/LAWP.2017.2721956

Ji, Songkun, Hong, Yanhua, Spencer, Paul S., Benedikt, Johannes

and Davies, Iwan 2017. Broad tunable photonic microwave generation based on period-one dynamics of optical injection vertical-cavity surface-emitting lasers. Optics Express 25 (17) , pp. 19863-19871. 10.1364/OE.25.019863

Chaudhary, Muhammad Akmal, Memon, Zulifqar Ali, Yusoff, Zubaida, Lees, Jonathan

2017. Characterization of baseband electrical memory in microwave devices using multi-tone measurement system. Presented at: 2016 16th Mediterranean Microwave Symposium (MMS), 14-16 November 2016. 16th Mediterranean Microwave Symposium (MMS), 2016. IEEE, p. 1. 10.1109/MMS.2016.7803811

Chaudhary, Muhammad Akmal, Lees, Jonathan

2016. Modulated waveform measurement and engineering system. Presented at: 2015 2nd International Conference on Electronics and Communication Systems (ICECS), Cairo, Egypt, 6-9 December 2015. 2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2015). Institute of Electrical and Electronics Engineers (IEEE), pp. 252-255. 10.1109/ICECS.2015.7440296

Ogboi, Friday Lawrence, Tasker, Paul J.

, Akmal, Muhammad, Lees, Jonathan

, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. Investigation of various envelope complexity linearity under modulated stimulus using a new envelope formulation approach. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 1 - 6 June 2014. Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE. IEEE, pp. 1-4. 10.1109/CSICS.2014.6978563

Ogboi, Friday Lawrence, Tasker, Paul J.

, Akmal, M., Lees, Jonathan

, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. High bandwidth investigations of a baseband linearization approach formulated in the envelope domain under modulated stimulus. Presented at: European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014. European Microwave Conference (EuMC). , vol.44 IEEE, pp. 1305-1308. 10.1109/EuMC.2014.6986683

Ogboi, Friday Lawrence, Tasker, Paul J.

, Mohkti, Z., Lees, Jonathan

, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2014. Sensitivity of AM/AM linearizer to AM/PM distortion in devices. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, FL, USA, 6 June 2014. ARFTG Microwave Measurement Conference (ARFTG), 2014 83rd. IEEE, pp. 1-4. 10.1109/ARFTG.2014.6899507

Ogboi, Friday Lawrence, Tasker, Paul J.

, Akmal, Muhammad, Lees, Jonathan

, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2013. A LSNA configured to perform baseband engineering for device linearity investigations under modulated excitations. Presented at: 43rd European Microwave Conference, Nuremberg, Germany, 7-10 October 2013. Proceedings of the 43rd European Microwave Conference. 2013 EUROPEAN MICROWAVE CONFERENCE (EUMC). pp. 684-687.

Chaudhary, M. A, Memon, Z. A., Lees, Jonathan

2013. Investigation of baseband electrical memory effects on the dynamic characteristics of power transistors. Presented at: 2013 16th International Multi Topic Conference (INMIC), Lahore, Pakistan, 19-20 December 2013. Multi Topic Conference (INMIC), 2013 16th International. IEEE, pp. 106-109. 10.1109/INMIC.2013.6731333

Chaudhary, Muhammad Akmal, Lees, Jonathan

2013. Reduction of baseband electrical memory effects using broadband active baseband load-pull. Presented at: 2013 IEEE International Wireless Symposium (IWS), Beijing, China, 14-18 April 2013. Wireless Symposium (IWS), 2013 IEEE International. IEEE, pp. 1-4. 10.1109/IEEE-IWS.2013.6616709

Hone, Thomas M., Bensmida, Souheil, Morris, Kevin A., Beach, Mark A., McGeehan, Joe P., Lees, Jonathan

2013. Inverse active load-pull in an inverse Doherty amplifier. Presented at: 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, Santa Clara, CA, USA, 20 Jauary 2013. Power Amplifiers for Wireless and Radio Applications (PAWR), 2013 IEEE Topical Conference on. IEEE, pp. 4-6. 10.1109/PAWR.2013.6490170

McGenn, William, Uren, Michael J., Benedikt, Johannes

2012. Development of an RF IV waveform based stress test procedure for use on GaN HFETs. Microelectronics Reliability 52 (12) , pp. 2880-2883. 10.1016/j.microrel.2012.09.007

Bensmida, Souheil, Morris, Kevin A., Beach, Mark, McGeehan, Joe P., Lees, Jonathan

, Choi, Heungjae

, Akmal, Muhammad, Benedikt, Johannes

2012. Nonlinear envelope tracking for efficiency optimization of power amplifiers. Presented at: 7th European Microwave Integrated Circuits Conference (EuMIC) 2012, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE, pp. 480-483.

Carrubba, Vincenzo, Akmal, Muhammad, Quay, Rüdiger, Lees, Jonathan

2012. The Continuous Inverse Class-F Mode With Resistive Second-Harmonic Impedance. IEEE Transactions on Microwave Theory and Techniques 60 (6) , pp. 1928-1936. 10.1109/TMTT.2012.2189228

Hone, Thomas M., Bensmida, Souheil, Morris, Kevin A., Beach, Mark A., McGeehan, Joe P., Lees, Jonathan

2012. Controlling Active Load-Pull in a Dual-Input Inverse Load Modulated Doherty Architecture. IEEE Transactions on Microwave Theory and Techniques 60 (6) , pp. 1797-1804. 10.1109/TMTT.2012.2190748

McGenn, William, Choi, Heungjae

, Lees, Jonathan

, Uren, Michael J., Benedikt, Johannes

2012. Development of a RF waveform stress test procedure for GaN HFETs subjected to infinite VSWR sweeps. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6259725

Carrubba, V., Quay, R., Schlechtweg, M., Ambacher, O., Akmal, M., Lees, Jonathan

2012. Continuous-ClassF3 power amplifier mode varying simultaneously first 3 harmonic impedances. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6258343

Smith, R. M., Lees, Jonathan

2012. A 40W push-pull power amplifier for high efficiency, decade bandwidth applications at microwave frequencies. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest (MTT, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE, pp. 1-3. 10.1109/MWSYM.2012.6259418

Smith, Robert Martin, Lees, Jonathan

2012. A Novel Formulation for High Efficiency Modes in Push-Pull Power Amplifiers Using Transmission Line Baluns. IEEE Microwave and Wireless Components Letters 22 (5) , pp. 257-259. 10.1109/LMWC.2012.2191273

Tasker, Paul J.

, Carrubba, Vincenzo, Wright, P., Lees, Jonathan

2012. Wideband PA design: The "continuous" mode of operation. Presented at: Compound Semiconductor Integrated Circuit Symposium (CSICS), La Jolla, CA, USA, 14-17 October 2012. Compound Semiconductor Integrated Circuit Symposium (CSICS), 2012 IEEE. Compound Semiconductor Integrated Circuit Symposium (CSICS), 2012 IEEE. IEEE, pp. 1-4. 10.1109/CSICS.2012.6340048

Mimis, K., Morris, K. A., Beach, M. A., McGeehan, J. P., Lees, Jonathan

2012. Overlapped segment piece-wise polynomial pre-distortion for the linearisation of power amplifiers in the presence of high PAPR OFDM signals. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012. Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. pp. 1-3. 10.1109/MWSYM.2012.6259543

Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan

2012. An enhanced modulated waveform measurement system. Australian Journal of Electrical and Electronics Engineering 9 (4) , pp. 429-438. 10.7158/E11-033.2012.9.4

Akmal, Muhammad, Ogboi, Friday Lawrence, Yusoff, Zubaida Binti, Lees, Jonathan

, Carrubba, Vincenzo, Choi, Heungjae

, Bensmida, S., Morris, K., Beach, M., McGeehan, J., Benedikt, Johannes

2012. Characterization of electrical memory effects for complex multi-tone excitations using broadband active baseband load-pull. Presented at: 7th European Microwave Integrated Circuits Conference, Amsterdam, The Netherlands, 29-30 October 2012. 7th European Microwave Integrated Circuits Conference (EuMIC), 2012. Proceedings of the 7th European Microwave Integrated Circuits Conference. Picastaway, NJ: IEEE, pp. 885-888.

Carrubba, Vincenzo, Clarke, Alan Leslie, Akmal, Muhammad, Lees, Jonathan

2011. On the extension of the continuous class-F mode power amplifier. IEEE Transactions on Microwave Theory and Techniques 59 (5) , pp. 1294-1303. 10.1109/TMTT.2011.2117435

Tasker, Paul J.

2011. Waveform inspired models and the harmonic balance emulator. IEEE Microwave Magazine 12 (2) , pp. 38-54. 10.1109/MMM.2010.940101

Yusoff, Zubaida Binti, Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan

2011. The benefit of GaN characteristics over LDMOS for linearity improvement using drain modulation in power amplifier system. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 2011. 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC 2011). New York: IEEE, pp. 109-112. 10.1109/INMMIC.2011.5773334

Carrubba, Vincenzo, Lees, Jonathan

2011. A novel highly efficient broadband continuous class-F RFPA delivering 74% average efficiency for an octave bandwidth. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 350-353. 10.1109/MWSYM.2011.5972701

Yusoff, Zubaida Binti, Lees, Jonathan

2011. Linearity improvement in RF power amplifier system using integrated Auxiliary Envelope Tracking system. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1752-1755. 10.1109/MWSYM.2011.5972769

FitzPatrick, Dominic, Saini, Randeep, Lees, Jonathan

2011. A waveform engineering approach to the design of improved efficiency wideband MMIC amplifiers. Presented at: Wireless and Microwave Technology Conference (WAMICON), 2011 IEEE 12th Annual., Clearwater Beach, FL, USA, 18-19 April 2011. 2011 IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), Clearwater Beach, FL, 18-19 April 2011. Los Alamitos, CA: IEEE, pp. 225-230. 10.1109/WAMICON.2011.5872859

Akmal, Muhammad, Carrubba, Vincenzo, Lees, Jonathan

, Bensmida, S., Benedikt, Johannes

, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul J.

2011. Linearity enhancement of GaN HEMTs under complex modulated excitation by optimizing the baseband impedance environment. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1747-1750. 10.1109/MWSYM.2011.5972833

Smith, Robert Martin, Cripps, Stephen Charles

and Lees, Jonathan

2011. A design methodology for the realization of multi-decade baluns at microwave frequencies. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, pp. 1204-1208. 10.1109/MWSYM.2011.5972702

Bell, James Joseph

, Saini, Randeep, Woodington, Simon Philip, Lees, Jonathan

2011. Behavioral model analysis using simultaneous active fundamental load-pull and harmonic source-pull measurements at X-band. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International. New York: IEEE, pp. 982-986. 10.1109/MWSYM.2011.5972803

Powell, J. R., Uren, Michael John, Martin, T., McLachlan, A., Tasker, Paul J.

, Bell, James Joseph

, Saini, Randeep, Woodington, Simon Philip, Benedikt, Johannes

2011. GaAs X-band high efficiency (65%) broadband (30%) amplifier MMIC based on the Class B to Class J continuum. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011. Published in: Seigel, Peter, Remley, Kate, Tzuang, C. and Ponchak, George eds. 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE, p. 355. 10.1109/MWSYM.2011.5973350

Saini, Randeep, Bell, James Joseph

, Canning, Timothy A. J., Woodington, Simon P., Fitzpatrick, Dominic M., Lees, Jonathan

2011. High speed non-linear device characterization and uniformity investigations at X-band frequencies exploiting behavioral models. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011. Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, 10.1109/ARFTG77.2011.6034552

Carrubba, Vincenzo, Clarke, Alan Leslie, Woodington, Simon P., McGenn, William, Akmal, Muhammad, Almuhaisen, Abdullah, Lees, Jonathan

2011. High-speed device characterization using an active load-pull system and waveform engineering postulator. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011. Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, 10.1109/ARFTG77.2011.6034553

Canning, Timothy A. J., Almuhaisen, Abdullah, Lees, Jonathan

2011. Utilization of RF I-V waveform load-pull information to identify the role FET knee profile has on locating the efficiency maxima. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011. Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, 10.1109/ARFTG78.2011.6183864

Saini, Randeep, Bell, James Joseph

, Williams, T., Lees, Jonathan

2011. Interpolation and extrapolation capabilities of non-linear behavioural models. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011. Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, 10.1109/ARFTG78.2011.6183865

Casbon, Michael A.

2011. Waveform Engineering beyond the Safe Operating Region: Fully Active Harmonic Load Pull Measurements under Pulsed Conditions. Presented at: 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), Waikoloa, HI, USA, 16-19 October 2011. Proceedings of the 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) - INTEGRATED CIRCUITS IN GaAs, InP, SiGe, GaN and Other Compound Semiconductors. Los Alamitos, CA: IEEE, 10.1109/CSICS.2011.6062435

Carrubba, Vincenzo, Clarke, Alan Leslie, Akmal, Muhammad, Yusoff, Zubaida Binti, Lees, Jonathan

2011. Exploring the Design Space for Broadband PAs using the Novel "Continuous Inverse Class-F Mode". Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 41st European Microwave Conference (EuMC). IEEE, pp. 333-336.

Hone, T., Bensmida, S., Paynter, M., Morris, K., Beach, M., McGeehan, J., Lees, Jonathan

2011. Optimized load modulation in a doherty amplifier using a current injection technique. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 296-299.

Akmal, Muhammad, Lees, Jonathan

, Jiangtao, S., Carrubba, Vincenzo, Yusoff, Zubaida Binti, Woodington, Simon Philip, Benedikt, Johannes

, Bensmida, S., Morris, K., Beach, M. and McGeehan, J. 2011. An enhanced modulated waveform measurement system for the robust characterization of microwave devices under modulated excitation. Presented at: Microwave Integrated Circuits Conference (EuMIC), 2011 European, Manchester, 10-11 October 2011. Microwave Integrated Circuits Conference (EuMIC), 2011 European. IEEE, pp. 180-183.

McGenn, William, Benedikt, Johannes

, Powell, Jeffrey and Uren, Michael 2011. RF waveform investigation of VSWR sweeps on GaN HFETs. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 17-20.

Paynter, M., Bensmida, S., Morris, K. A., McGeehan, J. P., Akmal, Muhammad, Lees, Jonathan

and Beach, M. 2011. Non-linear large signal PA modelling for switching-mode operation (class-F/continuous class-F). Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 152-155.

Almuhaisen, Abdullah, Lees, Jonathan

2011. Wide band high-efficiency power amplifier design. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011. Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE, pp. 184-187.

Hashmi, Mohammad Shabi, Clarke, Alan Leslie, Woodington, Simon Philip, Lees, Jonathan

2010. An accurate calibrate-able multiharmonic active load-pull system based on the envelope load-pull concept. IEEE Transactions on Microwave Theory and Techniques 58 (3) , pp. 656-664. 10.1109/TMTT.2010.2040403

Clarke, Alan Leslie, Akmal, Muhammad, Lees, Jonathan

2010. Investigation and analysis into device optimization for attaining efficiencies in-excess of 90% when accounting for higher harmonics. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. 2010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE, pp. 1114-1117. 10.1109/MWSYM.2010.5517222

Alghanim, A., Benedikt, Johannes

and Tasker, Paul

2010. Effect of low frequency memory on high power 12W LDMOS transistors intermodulation distortion. Proceedings of the World Academy of Science, Engineering and Technology 63 , pp. 53-57.

Hashmi, M. S., Benedikt, Johannes

and Tasker, Paul

2010. Impact of group delay on the load emulation in multi-tone active envelope load-pull system. Australian Journal of Electrical and Electronics Engineering 7 (1) , pp. 83-88.

Akmal, M., Lees, Jonathan

, Bensmida, S., Woodington, S., Carrubba, V., Cripps, Stephen Charles

, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul

2010. The effect of baseband impedance termination on the linearity of GaN HEMTs. Presented at: European Microwave Conference 2010, Paris, France, (561636) pp. 1046-1049.

Akmal, M., Lees, Jonathan

, Bensmida, S., Woodlington, S., Benedikt, Johannes

, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul

2010. The impact of baseband electrical memory effects on the dynamic transfer characteristics of microwave power transistors. Presented at: 2010 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Gothenburg, Sweden, (548011) pp. 148-151.

Hashim, Shaiful, Hashmi, Mohammad Shabi, Benedikt, Johannes

2010. Effect of impedance variation around the fundamentals on PA distortions characteristics under wideband multi-tone stimulus. Presented at: IEEE Asia Pacific Conference on Circuits and Systems, Kuala Lumpur, Malaysia, 6-9 December 2010. Published in: Rohani, F. Z., Ahmad, S. A., Che Soh, A., Jaafar, H., Zaini, M. H. M., Sidek, M. H. M. and Shaufiq, M. eds. Proceedings of the 2010 Asia Pacific Conference on Circuit and System, 6th – 9th December 2010, Kuala Lumpur, Malaysia. Los Alamitos, CA: IEEE, pp. 1115-1118. 10.1109/APCCAS.2010.5775081

Mashad Nemati, Hossein, Clarke, Alan Leslie, Cripps, Stephen Charles

, Fager, Christian, Grahn, Jan and Zirath, Herbert 2010. Evaluation of a GaN HEMT transistor for load- and supply-modulation applications using intrinsic waveform measurements. Presented at: IEEE MTT 2010 International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. 2010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). Piscataway, NJ: IEEE, pp. 509-512. 10.1109/MWSYM.2010.5517696

Woodington, Simon Philip, Saini, Randeep, Williams, D., Lees, Jonathan

2010. Behavioral model analysis of active harmonic load-pull measurements. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International. New York: IEEE, pp. 1688-1691. 10.1109/MWSYM.2010.5517261

Almuhaisen, Abdullah, Wright, Peter Thomas, Lees, Jonathan

2010. Novel wide band high-efficiency active harmonic injection power amplifier concept. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010. 2010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE, pp. 664-667. 10.1109/MWSYM.2010.5514759

FitzPatrick, D. M., Williams, T., Lees, Jonathan

and Tasker, Paul

2010. Exploitation of active load-pull and DLUT models in MMIC design. Presented at: IEEE Radio Frequency Integrated Circuits Symposium, Anaheim, CA, USA, 23-25 May 2010. Proceedings of the 2010 IEEE Radio Frequency Integrated Circuits Symposium May 23-25, 2010, Anaheim, California, USA. Piscataway, NJ: IEEE, pp. 487-490. 10.1109/RFIC.2010.5477406

McGenn, W., Powell, J., Uren, M., Benedikt, Johannes

and Tasker, Paul

2010. RF waveform method for the determination of the safe operating area of GaN HFET's for amplifiers subjected to high output VSWR. Presented at: European Microwave Week 2010: Connecting the World, (EuMIC 2010), Paris, France, (561371) pp. 282-285.

Bensmida, S., Morris, K., Akmal, Muhammad, Lees, Jonathan

, Wright, Peter Thomas, Benedikt, Johannes

, McGeehan, J. and Beach, M. 2010. Generic pre-distortion of a Class-J Power amplifier. Presented at: European Microwave Conference 2010, Paris, France, (561648) pp. 1022-1025.

Carrubba, V., Clarke, A. L., Akmal, M., Lees, Jonathan

2010. The continuous Class-F Mode mode power amplifier. Presented at: European Microwave Conference (EuMC) 2010, Paris, France, (561630) pp. 1674-1677.

Lees, Jonathan

, Akmal, M., Bensmida, S., Benedikt, Johannes

, Morris, K., Beach, M., McGeehan, J. and Tasker, Paul

2010. Waveform engineering applied to linear-efficient PA design. Presented at: 2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON 2010), Melbourne Beach, USA, 12-13 April, 2010. (546184) 10.1109/WAMICON.2010.5461847

Saini, Randeep, Woodington, Simon P., Lees, Jonathan

2010. An intelligence driven active loadpull system. Presented at: 75th ARFTG Microwave Measurement Conference: Measurement of Modulated Signals for Communications, Anaheim, USA, (549632)

Akmal, Muhammad, Lees, Jonathan

, Carrubba, Vincenzo, Bensmida, S., Woodington, S., Benedikt, Johannes

, Morris, K, Beach, M., McGeehan, J. and Tasker, Paul J.

2010. Minimization of baseband electrical memory effects in GaN HEMTs using active IF load-pull. Presented at: Asia-Pacific Microwave Conference (22nd : 2010), Yokahama-shi, Japan, 7-10 December 2010. 2010 Asia-Pacific Microwave Conference proceedings : APMC 2010 : Dec. 7-10, Yokohama, Japan. Tokyo, Japan: Institute of Electronics, Information and Communication Engineers (IEICE), pp. 5-8.

Wright, P., Lees, Jonathan

2009. A Methodology for Realizing High Efficiency Class-J in a Linear and Broadband PA. IEEE Transactions on Microwave Theory and Techniques 57 (12) , pp. 3196-3204. 10.1109/TMTT.2009.2033295

Fitzpatrick, Dominic M., Lees, Jonathan

, Sheikh, Abdulla, Benedikt, Johannes

2009. Systematic investigation of the impact of harmonic termination in the efficiency performance of above octave bandwidth microwave amplifiers. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009. European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications, pp. 1445-1448.

Cripps, Stephen Charles

, Clarke, A. L., Lees, Jonathan

2009. On the continuity of high efficiency modes in linear RF power amplifiers. IEEE Microwave and Wireless Components Letters 19 (10) , pp. 665-667. 10.1109/LMWC.2009.2029754

Sheikh, Abdulla, Roff, C., Benedikt, Johannes

, Noori, B., Wood, J. and Aaen, P. H. 2009. Peak class F and inverse class F drain efficiencies using Si LDMOS in a limited bandwidth design. IEEE Microwave and Wireless Components Letters 19 (7) , pp. 473-475. 10.1109/LMWC.2009.2022138

Qi, H., Benedikt, Johannes

and Tasker, Paul

2009. Nonlinear Data Utilization: From Direct Data Lookup to Behavioral Modeling. IEEE Transactions on Microwave Theory and Techniques 57 (6) , pp. 1425-1432. 10.1109/TMTT.2009.2019996

Roff, C., Benedikt, Johannes

, Wallis, D. J., Hilton, K. P., Maclean, J. O., Hayes, D. G., Uren, Michael John and Martin, T. 2009. Analysis of DC-RF Dispersion in AlGaN/GaN HFETs Using RF Waveform Engineering. IEEE Transactions of Electron Devices 56 (1) , pp. 13-19. 10.1109/TED.2008.2008674

Hashim, S. J., Hashmi, M. S., Williams, T., Woodington, W., Benedikt, Johannes

and Tasker, Paul

2009. Active envelope load-pull for wideband multi-tone stimulus incorporating delay compensation. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008. Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE, pp. 317-320. 10.1109/EUMC.2008.4751452

Sheikh, A., Lees, Jonathan

2009. Utilization of a measurement based CAD tool for enhanced pa design investigations. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008. Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE, pp. 1671-1674. 10.1109/EUMC.2008.4751795

Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, Jonathan

and Tasker, Paul

2009. Electronic Multi-Harmonic Load-Pull System for Experimentally Driven Power Amplifier Design Optimization. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, USA, pp. 1549-1552.

Kang, I.H., Zhang, H.C., Yun, Y., Tasker, Paul

and Porch, Adrian

2009. High quality factor extraction of miniaturised coupled line bandpass filter implemented using RF silicon integrated circuits. Presented at: Proceedings 39th European Microwave Conference (EuMC 2009), Rome, Italy, pp. 830-833. 10.1109/EUMC.2009.5295966

Wright, Peter Thomas, Lees, Jonathan

2009. An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, MA, USA, 7-12 June 2009. IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09. Los Alamitos, CA: IEEE, pp. 653-656. 10.1109/MWSYM.2009.5165781

Bensmida, S., Morris, K., Lees, Jonathan

, Wright, Peter Thomas, Benedikt, Johannes

, Beach, M. and McGeehan, J. 2009. Power amplifier memory-less pre-distortion for 3GPP LTE application. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009. European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications, pp. 1433-1436.

Alghanim, A., Lees, Jonathan

, Williams, T., Benedikt, Johannes

and Tasker, Paul J

2008. Sensitivity of electrical baseband memory effects to higher-order IF components for high-power LDMOS power amplifiers. Electronics Letters 44 (5) , pp. 358-359. 10.1049/el:20083348

Alghanim, A., Lees, Jonathan

, Williams, T., Benedikt, Johannes

and Tasker, Paul

2008. Reduction of electrical baseband memory effect in high-power LDMOS devices using optimum termination for IMD3 and IMD5 using active load-pull. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 415-418. 10.1109/MWSYM.2008.4633191

FitzPatrick, D. M., Williams, T., Lees, Jonathan

and Tasker, Paul

2008. Large signal device characterisation using active load-pull for improved MMIC design. Presented at: IET Seminar on RF and Microwave IC Design, London, UK, IET, pp. 1-7.

Hashmi, M. S., Hashim, S. J., Woodington, S., Williams, T., Benedikt, Johannes

and Tasker, Paul

2008. Active envelope load pull system suitable for high modulation rate multi-tone applications. Presented at: Integrated Nonlinear Microwave & Millimetre-Wave Circuits 2008 Workshop (INMMIC 2008), Malaga, Spain, pp. 93-96. 10.1109/INMMIC.2008.4745724

Wright, Peter Thomas, Sheikh, Aamir, Roff, Chris, Tasker, Paul J.

2008. Highly efficient operation modes in GaN power transistors delivering upwards of 81% efficiency and 12W output power. Presented at: IEEE MTT-S International Microwave Symposium, Atlanta, GA, USA, 15-20 June 2008. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, 15-20 June 2008. Piscataway, NJ: Institute of Electrical and Electronics Engineers, pp. 1147-1150. 10.1109/MWSYM.2008.4633260

Jiangtao, S., Benedikt, Johannes

and Tasker, Paul

2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: Microwave Symposium Digest, 2008 IEEE MTT-S International, Atlanta, GA, pp. 265-268. 10.1109/MWSYM.2008.463315

Lees, Jonathan

, Williams, T., Woodington, S., McGovern, P., Cripps, Stephen Charles

and Tasker, Paul

2008. Demystifying Device related Memory Effects using Waveform Engineering and Envelope Domain Analysis. Presented at: 38th European Microwave Conference 2008 (EuMC 2008), Amsterdam, The Netherlands, pp. 753-756. 10.1109/EUMC.2008.471562

Roff, C., McGovern, P., Benedikt, Johannes

, Johnson, M. A., Barlage, D. W., Sutton, W. and Braddock, D. 2008. Pulsed-IV and RF waveform measurements of unique high-K dielectric GaN MOSFETs. Presented at: IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS), Tel Aviv, Israel, 10.1109/COMCAS.2008.4562790

Sheikh, A., Roff, C., Benedikt, Johannes

, Noori, Basim, Aaen, P. and Wood, J. P. 2008. Systematic waveform engineering enabling high efficiency modes of operation in Si LDMOS at both L-band and S-band frequencies. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 1143-1146. 10.1109/MWSYM.2008.4633259

Su, Jiangtao, Benedikt, Johannes

2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 265-268. 10.1109/MWSYM.2008.4633154

Williams, T., Mojon, O., Woodington, Simon Philip, Lees, Jonathan

, Barciela, M. F., Benedikt, Johannes

2008. A robust approach for comparison and validation of large signal measurement systems. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 257-260. 10.1109/MWSYM.2008.4633152

Woodington, Simon Philip, Williams, T., Qi, H., Williams, D., Pattison, L., Patterson, A., Lees, Jonathan

2008. A novel measurement based method enabling rapid extraction of a RF waveform look-up table based behavioural model. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, pp. 1453-1456. 10.1109/MWSYM.2008.463305

Wright, Peter Thomas, Lees, Jonathan

2008. GaN power transistors in narrow and wide bandwidth applications. Presented at: IET Seminar on Wideband Receivers and Components, London, UK, p. 1.

Benedikt, Johannes

, Qi, Hao and Tasker, Paul J

2007. Novel Nonlinear Model for Rapid Waveform-based Extraction Enabling Accurate High Power PA Design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007, 10.1109/MWSYM.2007.380246

Roff, Christopher, Benedikt, Johannes

2007. Design Approach for Realization of Very High Efficiency Power Amplifiers. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007, 10.1109/MWSYM.2007.380310

Roff, Chris, McGovern, Peter, Benedikt, Johannes

, Balmer, R.S., Wallis, D.J., Hilton, K.P., Maclean, J.O., Hayes, D.G., Uren, M.J. and Martin, T. 2007. Detailed analysis of DC-RF dispersion in AlGaN/GaN HFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 2006. 2006 European Microwave Integrated Circuits Conference. IEEE, p. 43. 10.1109/EMICC.2006.282745

Gaddi, R., Williams, T., Benedikt, Johannes

, Giacomozzi, F., Margesin, B. and Gnudi, A. 2007. Large-Signal Vectorial Load - Pull Characterization of MEMS RF-Actuation. IEEE Microwave and Wireless Components Letters 17 (12) , pp. 903-905. 10.1109/LMWC.2007.908049

Alghanim, A., Lees, Jonathan

, Wiliams, T., Benedikt, Johannes

and Tasker, Paul

2007. Investigation of electrical base-band memory effects in high power 20w LDMOS power amplifiers. Presented at: 37th European Microwave Conference, Munich, Germany, pp. 48-51. 10.1109/EUMC.2007.4405122

Hashmi, M. S., Hashim, S. J., Williams, T., Benedikt, Johannes

and Tasker, Paul

2007. A broadband control electronics for envelope load pull system. Presented at: International Symposium on Signals, Systems and Electronics (ISSSE07), Montreal, Canada, pp. 197-200. 10.1109/ISSSE.2007.4294447

Benedikt, Johannes

and Tasker, Paul

2007. Characterisation of high power RF transistors: Waveform measurement and engineering. Presented at: Proceedings Workshop on Advances in Active Device Characterisation and Modelling for RF and Microwave, IEEE MTT-S International Microwave Symposium,

Roff, C., Sheikh, A., Benedikt, Johannes

, Hilton, K. P., Maclean, J. O., Hayes, D. G., Uren, Michael John and Martin, T. 2007. Optimising GaN/AIGaN HFET designs for high efficiency. Presented at: 2nd European Microwave Integrated Circuits Conference (EuMIC 2007), Munich, Germany, pp. 165-168. 10.1109/EMICC.2007.4412674

Sheikh, A., Tasker, Paul J.

, Lees, Jonathan

2007. The impact of system impedance on the characterisation of high power devices. Presented at: 37th European Microwave Conference (EuMC), Munich, Germany, pp. 949-952. 10.1109/EUMC.2007.4405315

Alghanim, A., Lees, Jonathan

, Williams, T., Benedikt, Johannes

2007. Using active IF load-pull to investigate electrical base-band induced memory effects in high-power LDMOS transistors. Presented at: Asia-Pacific Microwave Conference (APMC 2007), Bangkok, Thailand, IEEE, pp. 1-4. 10.1109/APMC.2007.4554737

Tasker, Paul J.

2007. Waveform measurement and characterisation: The multi-tone characterisation challenge. Presented at: Proceedings of Workshop on RF power transistor and amplifier characterisation techniques, IEEE 2007 Radio and Wireless Symposium, Long Beach, USA,

Qi, Hao, Benedikt, Johannes

2006. A novel approach for effective import of nonlinear device characteristics into CAD for large signal power amplifier design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2006, pp. 477-480. 10.1109/MWSYM.2006.249596

Aboush, Z., Benedikt, Johannes

, Priday, J. and Tasker, Paul

2006. DC-50 GHz low loss thermally enhanced low cost LCP package process utilizing mico via technology. Presented at: 2006 IEEE Microwave Symposium, San Francisco, USA, pp. 961-964.

Mayer, M., Arthaber, H., Magerl, G., Kother, D., Lees, Jonathan

and Tasker, Paul

2006. Advanced load pull systems. Presented at: The Institution of Engineering and Technology Seminar on High Efficiency Power Amplifier Design for Next Generation Wireless Applications, Cambridge, UK, pp. 27-54.

Lees, Jonathan

, Sheikj, A., Benedikt, Johannes

and Tasker, Paul

2006. The Design of a Gallium Nitride Doherty Amplifier using Waveform Measurements and Active Harmonic Load-Pull. Presented at: 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits, Aveiro, Portugal, pp. 26-29.

Roff, R., McGovern, P., Benedikt, Johannes

, Balmer, R. S., Walis, D. J., Hilton, K. P., MacLean, J. O., Hayes, D. G., Uren, Michael John and Martin, T. 2006. Detailed analysis of DC-RF dispersion in AIGaN/GaN NFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference (EuMIC), Manchester, UK, pp. 43-45.

Tudor, W., Benedikt, Johannes

2006. Full functional 'real time' non-linear device characterization system incorporating active load control. Presented at: 36th European Microwave Conference, pp. 1610-1613.

Uren, Michael John, Hayes, D. G., Balmer, R. S., Wallis, D. J., Hilton, K. P., Maclean, J. O., Martin, T., Roff, C., McGovern, P., Benedikt, Johannes

2006. Control of short-channel effects in GaN/AIGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, pp. 65-68.

Uren, M, Hayes, D, Balmer, R, Wallis, D

, Hilton, K, Maclean, J, Martin, T, Roff, C, McGovern, P, Benedikt, J

and Tasker, P

2006. Control of Short-Channel Effects in GaN/AlGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 2006. 2006 European Microwave Integrated Circuits Conference. IEEE, p. 65. 10.1109/EMICC.2006.282751

Aboush, Zaid, Lees, Jonathan

2005. Active harmonic load-pull system for characterising highly mismatched high power transistors. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005, 2005. 10.1109/MWSYM.2005.1516920

Williams, Tudor, Tasker, Paul J.

2005. Experimental evaluation of an active envelope load pull architecture for high speed device characterization. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005, IEEE, 10.1109/MWSYM.2005.1516980

Aboush, Z., Benedikt, Johannes

, Priday, J. and Tasker, Paul

2005. Novel cost-efficient packaging technology for high-power LDMOS devices. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK, pp. 15-18.

Aboush, Z., Jones, C., Knight, G., Sheikh, A., Lee, H., Lees, Jonathan

and Tasker, Paul

2005. High power active harmonic load-pull system for characterisation of high power 100-Watt transistors. Presented at: 35th European Microwave Conference, Paris, France, , vol.1 pp. 609-612. 10.1109/EUMC.2005.1608930

Alghanim, A., Benedikt, Johannes

and Tasker, Paul

2005. A measurement test-set for characterisation of high power LDMOS transistors including memory effects. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK, pp. 29-32.

Lees, Jonathan

, Hilton, P., Powell, J., Balmer, R. S., Uren, Michael John, Martin, T. and Tasker, Paul

2005. Experimental gallium nitride microwave Doherty amplifier. IEEE Electronic Letters 41 (23) , pp. 1284-1285. 10.1049/el:20053155

McGovern, P., Benedikt, Johannes

, Powell, J., P., Hilton K., L., Glasper J., S., Balmer R., Martin, T. and Uren, M. J. 2005. Analysis of DC-RF dispersion in AlGaN/GaN HFETs using pulsed I-V and time-domain waveform measurements. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Atlanta, USA, pp. 503-506.

Qi, H., Benedikt, Johannes

and Tasker, Paul

2005. Direct extraction of large-signal table-based behavioural models from time-domain voltage and current waveforms. Presented at: 10th IEEE High Fequency Postgraduate Student Colloquium, Leeds, UK, pp. 25-28.

Kharji, O. A., Williams, T., Benedikt, Johannes

and Tasker, Paul

2005. A broadband envelope load pull system. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK, pp. 21-24.

Lees, Jonathan

, Bunz, B., Gaquiere, C., Ducatteau, D., Marquez-Sequra, E., Martin-Guerrero, T. M. and Barel, A. 2005. A comparison of load-pull measurement results of a 4W Phemt involving five European laboratories. Presented at: European Gallium Arsenide and Other Semiconductor Application Symposium, Paris, France, 3-4 October, 2005. Proceedings of the European Gallium Arsenide and Other Semiconductor Application Symposium Paris, France,3-4 October, 2005. IEEE, pp. 321-324.

Lees, Jonathan

, Hilton, K. P., Powell, J., Balmer, R. S., Uren, M. J., Martin, T. and Tasker, Paul

2005. Characterisation of an experimental gallium nitride microwave Doherty amplifier. Presented at: 35th European Microwave Conference, Paris, France, 4-6 October 2005. 35th European Microwave Conference: conference proceedings. Horizon House,

Williams, T., Benedikt, Johannes

2005. Application of a novel active envelope load pull architecture in large signal device characterisation. Presented at: 35th European Microwave Conference, Paris, France,

McGovern, Peter, Williams, David James, Tasker, Paul J.

, Powell, J., Hilton, K. P., Balmer, R. S., Martin, T. and Uren, M. J. 2004. Single-tone and two-tone time-domain large signal characterization of GaN HFETs operated in class A. Presented at: IEEE MTT-S International Microwave Symposium Digest 2004, Vol 2, 2004. pp. 825-828. 10.1109/MWSYM.2004.1339092

Aboush, Z., Benedikt, Johannes

and Tasker, Paul

2004. High power harmonic active load-pull using broadband matching networks. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK, pp. 145-150.

Lees, Jonathan

, Haczewski, J., Benedikt, Johannes

and Tasker, Paul

2004. An automated multi-stimulus measurement system for characterising multi-device amplifiers. Presented at: 34th European Microwave Conference, Amsterdam, The Netherlands, , vol.Nov-15 pp. 435-438.

Williams, T., Benedikt, Johannes

2004. Novel base-band envelope load pull architecture. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK, pp. 157-161.

Lees, Jonathan

, Goss, M., Benedikt, Johannes

and Tasker, Paul

2003. Single-tone optimisation of an adaptive-bias Doherty structure. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Philadelphia, USA, 8-13 June 2003. Microwave Symposium Digest, IEEE MTT-S International. , vol.3 IEEE, pp. 2213-2216. 10.1109/MWSYM.2003.1210604

Benedikt, Johannes

and Tasker, Paul

2002. High power time-domain measurement bench for power amplifier development. Presented at: Asia-Pacific Microwave Conference, Institute of Electronics, Information and Communication Engineers (IEICE), Kyoto, Japan, pp. 303-306.

Tasker, Paul J.

2002. High-power time-domain measurement bench for power amplifier development. Presented at: 59th ARFTG Conference Digest, Seattle, USA, pp. 107-110.

Gaddi, R., Pla, J. A., Benedikt, Johannes