FET-integrated CPW and the application in filter synthesis design method on traveling-wave switch above 100 GHz

Zuo-Min Tsai *, Mei Chao Yeh, Hong Yeh Chang, Ming Fong Lei, Kun You Lin, Chin Shen Lin, Huei Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

A new transmission-line concept, called the field-effect transistor (FET)-integrated coplanar waveguide (CPW), is proposed. This concept treats the passive two-finger FET as CPW and, thus, the scaling rule is more accurate than the previous model, especially in high frequency. The extraction approach of the parameters of the FET-integrated CPW is also included. With this concept, the design procedure of traveling-wave switches can be equivalent to a filter synthesis problem. Based on this design procedure, a single-pole single-throw and a single-pole double-throw traveling-wave switch have been realized and measured using 0.15-μm high-linearity AlGaAs/InGaAs/GaAs pseudomorphic high electron-mobility transistors. Finally, the frequency limitation of the traveling-wave switches is also discussed. The results show the FET-integrated CPW is the most efficient way to overcome the frequency limitations of traveling-wave switches, achieving operation frequency to 135 GHz, the highest frequency reported to date.

Original languageEnglish
Pages (from-to)2090-2096
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Volume54
Issue number5
DOIs
StatePublished - 1 May 2006

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