A 40-GHz MMIC SPDT bandpass filter integrated switch

Shih Fong Chao*, Che Chung Kuo, Zuo-Min Tsai , Huei Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Stepped-impedance resonators (SIR) with HEMTs loaded at one end are used to develop a 40 GHz MMIC SPDT filter integrated switch. The HEMTs are used to switch the resonant frequencies of the loaded stepped-impedance resonators. At on-state, the resonators resonate at the same center frequency to pass the RF signal. With the coupled-resonator filter theory, the filter response could be easily designed and synthesized. At off-state, the resonant frequencies of the resonators between input and output ports are staggered to block the RF signal. In this paper, a compact 40-GHz MMIC single-pole-double-throw (SPDT) switch with integrated a third-order bandpass filter is demonstrated. At thru-port, a bandpass filter response with measured insertion loss of 3.1 dB at the center frequency is obtained. At the isolated-port, an isolation of higher than 30 dB is also obtained. The proposed circuit successfully combines an SPDT switch and a bandpass filter into a single circuit component, and makes a high level of MMIC integration become possible.

Original languageEnglish
Title of host publication2007 IEEE MTT-S International Microwave Symposium Digest
Pages483-486
Number of pages4
DOIs
StatePublished - 2 Oct 2007
Event2007 IEEE MTT-S International Microwave Symposium, IMS 2007 - Honolulu, HI, United States
Duration: 3 Jun 20078 Jun 2007

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2007 IEEE MTT-S International Microwave Symposium, IMS 2007
CountryUnited States
CityHonolulu, HI
Period3/06/078/06/07

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  • Cite this

    Chao, S. F., Kuo, C. C., Tsai , Z-M., & Wang, H. (2007). A 40-GHz MMIC SPDT bandpass filter integrated switch. In 2007 IEEE MTT-S International Microwave Symposium Digest (pp. 483-486). [4263855] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2007.380512