Transmission lines characteristic impedance versus Q-factor in CMOS technology

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dc.contributor.author Venter, J.J.P. (Johannes)
dc.contributor.author Franc, Anne-Laure
dc.contributor.author Stander, Tinus
dc.contributor.author Ferrari, Philippe
dc.date.accessioned 2021-07-22T13:47:38Z
dc.date.issued 2022-05
dc.description.abstract This paper presents a systematic comparison of the relationship between transmission line characteristic impedance and Q-factor of CPW, slow-wave CPW, microstrip, and slow-wave microstrip in the same CMOS back-end-of-line process. It is found that the characteristic impedance for optimal Q-factor depends on the ground-to-ground spacing of the slow-wave transmission line. Although the media are shown to be similar from a mode of propagation point of view, the 60-GHz optimal Q-factor for slow-wave transmission lines is achieved when the characteristic impedance is ≈23 Ω for slow-wave CPWs and ≈43 Ω for slow-wave microstrip lines, with Q-factor increasing for wider ground plane gaps. Moreover, it is shown that slow-wave CPW is found to have a 12% higher optimal Q-factor than slow-wave microstrip for a similar chip area. The data presented here may be used in selecting Z0 values for S-MS and S-CPW passives in CMOS that maximize transmission line Q-factors. en_ZA
dc.description.department Electrical, Electronic and Computer Engineering en_ZA
dc.description.embargo 2021-10-20
dc.description.librarian hj2021 en_ZA
dc.description.sponsorship The South African Radio Astronomy Observatory (SARAO) (www.sarao.ac.za) and the National Research Foundation (NRF) of South Africa. en_ZA
dc.description.uri http://journals.cambridge.org/action/displayJournal?jid=MRF en_ZA
dc.identifier.citation Venter, J. J. P., Franc, A.-L., Stander, T. and Ferrari, P. (2022) “Transmission lines characteristic impedance versus Q-factor in CMOS technology,” International Journal of Microwave and Wireless Technologies. Cambridge University Press, 14(4), pp. 432–437. doi: 10.1017/S175907872100060X. en_ZA
dc.identifier.issn 1759-0787 (print)
dc.identifier.issn 1759-0795 (online)
dc.identifier.other 10.1017/S175907872100060X
dc.identifier.uri http://hdl.handle.net/2263/80957
dc.language.iso en en_ZA
dc.publisher Cambridge University Press en_ZA
dc.rights © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association. en_ZA
dc.subject Coplanar waveguide en_ZA
dc.subject Microstrip en_ZA
dc.subject Millimeter wave integrated circuits en_ZA
dc.subject Slow-wave transmission lines en_ZA
dc.title Transmission lines characteristic impedance versus Q-factor in CMOS technology en_ZA
dc.type Postprint Article en_ZA


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