A Balanced Tri-Band Substrate Integrated Waveguide Bandpass Filter With High Selectivity
This paper proposed a balanced tri-band bandpass filter (BPF) with high selectivity based on substrate integrated waveguide (SIW) technology.The tri-band filtering response and multiple transmission zeros (TZs) are attained by elaborately merging cascaded quadruplet (CQ) topology and split topology.The proposed balanced tri-band bandpass filter is