Novel slotted mmWave CPW branch line coupler for MMIC and sub-THz applications

Alathbah, M., Eblabla, A. ORCID: https://orcid.org/0000-0002-5991-892X and Elgaid, K. ORCID: https://orcid.org/0000-0003-3265-1097 2021. Novel slotted mmWave CPW branch line coupler for MMIC and sub-THz applications. Presented at: 13th International Conference on Advanced Semiconductor Devices And Microsystems (ASDAM 2020), Smolenice, Slovakia, 11-14 October 2020. 2020 13th International Conference on Advanced Semiconductor Devices And Microsystems (ASDAM). IEEE, pp. 111-114. 10.1109/ASDAM50306.2020.9393863

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Abstract

This paper presents a novel mm-wave branch line coupler with an enhanced isolation up to 72dB between the input ports, whereas a conventional branch line coupler usually gives less than 40dB of isolation. Similarly, there was also a small increase in the return loss. The two slots are situated a half wavelength apart acting as resonators and bandpass filters. The shape of the slot is rectangular with smaller sides equal to a half of the transmission line (TL) it is placed on (whether the Z0 or Z0/√2ohmTL). The two slots must be identical to output symmetrical resonance frequencies. This is a promising coupler design particularly in an integrated microwave circuit such as, mixer or multiplier circuits at high frequencies (mmWave).

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	9781728197760
ISSN:	2474-9737
Last Modified:	10 Feb 2024 02:07
URI:	https://orca.cardiff.ac.uk/id/eprint/140970

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