High efficiency distributed amplifier using optimum transmission line

Jeong, Sigyun, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Kenney, J. Stevenson and Kim, Chuldong 2007. High efficiency distributed amplifier using optimum transmission line. Presented at: European Conference on Wireless Technologies (ECWT), Munich, Germany, 8-10 October 2007. 2007 European Conference on Wireless Technologies. Picastaway, NJ: IEEE, pp. 367-370. 10.1109/ECWT.2007.4404023

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Abstract

In this paper, we performed numerical analysis on reversed current of distributed amplifier (DA) based on transmission line theory and proposed optimum transmission line (OTL) to cancel reversed currents. This OTL has improved electrical performances of DA. The distributed amplifier using optimum transmission line (DAOTL) has been implemented with pHEMT transistor. Due to high capacitance of pHEMT, cutoff frequency is decided to 3.6 GHz. As a result of measurement, we could obtain maximum gain of 14.5 dB and minimum gain of 12.8 dB inner operation band. Moreover, we could PAE of 25.6% which is higher about 7.6% than the conventional DA (CDA) at 3 GHz. The output power was obtained 10.9 dBm which is higher about 1.7 dB than the conventional at 3 GHz.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	IEEE
ISBN:	9782874870033
Last Modified:	27 Oct 2022 10:08
URI:	https://orca.cardiff.ac.uk/id/eprint/69010

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