A Half-Mode Substrate-Integrated-Waveguide Tunable Filter Using Packaged RF MEMS Switches
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A two-pole, half-mode substrate-integrated-waveguide (HMSIW) RF MEMS tunable filter with 28% tuning range around 1.4 GHz is presented. The filter occupies a total area of λ g × 0.7 λ g @ 1.4 GHz and exhibits an insertion loss of 1.2-3.4 dB, return loss better than 11 dB and quality factor of 75-140 for all tuning states, while having excellent linearity. The filter maintains a constant absolute 1 dB bandwidth of 85 ± 10 MHz over the filter tuning range. Circuit models for the tunable HMSIW resonator and a methodology for systematic filter design are also described in detail. © 2012 IEEE.
author list (cited authors)
Sekar, V., & Entesari, K.