Compact quasi‐elliptic SIR‐SIW filter with multiple transmission zeros

• DOI: 10.1002/mop.32914
• Publication Date: 2021-06-09T08:18:01Z
• Authors: Shulin Song; Yu Guo; Yang Wang
• Keywords: Passband; Waveguide; Waveguide filter

Abstract In this paper, a compact quasi‐elliptic stepped impedance resonator‐substrate integrated waveguide (SIR‐SIW) bandpass filter with multiple transmission zeros (TZs) has been proposed. The SIR‐SIW consists of SIW cavity and SIR. employment SIR makes it possible to realize energy coupling paths within area for introduction TZs. is used its high Q, low loss characteristics. Besides, two TZs are introduced by the SIW. Including path between source load, totally four besides passband realized. A miniature (0.3 λg 2 ) four‐pole, four‐transmission zero selectivity Experimental verification provided good agreement found simulation measurement.