Vol. 104

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2022-05-31

Spurious Coupling Mitigation in Liquid Crystal Polymer Based Microstrip Filter at Q-Band

By Nishant Shukla, Vikas Gupta, and Praveen Ambati
Progress In Electromagnetics Research Letters, Vol. 104, 105-112, 2022
doi:10.2528/PIERL22040403

Abstract

RF and mm wave filterssuffers from a common problem of asymmetries in filters transmission response caused by unwanted field couplings between individual resonators. In this paper, unwanted or spurious couplings between non-adjacent resonators are identified in the filter network from the simulation stage and mitigated to the extent possible. A 4-pole Quasi Elliptic Planar Band Pass Filter is fabricated at 48.5 GHz on a Liquid Crystal Polymer (LCP) substrate. An improvement of 6 dB in side lobe imbalance in filter transmission response is obtained. Effect of spurious coupling on band pass filters transmission response is demonstrated through EM simulation. Commensurate measurement results are presented.

Citation


Nishant Shukla, Vikas Gupta, and Praveen Ambati, "Spurious Coupling Mitigation in Liquid Crystal Polymer Based Microstrip Filter at Q-Band," Progress In Electromagnetics Research Letters, Vol. 104, 105-112, 2022.
doi:10.2528/PIERL22040403
http://www.jpier.org/PIERL/pier.php?paper=22040403

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