Substrate Integrated Waveguide Multiband Bandpass Filters and Multiplexers

The implementation schemes and techniques of substrate integrated waveguide (SIW) multiband bandpass filters (BPFs) and multiplexers are examined and summarized in this article. A comprehensive overview of technical approaches and diverse design methodologies are briefly described, basically embracing numerous schemes such as shunting, multimode resonator, multimode-shunting hybrid, and splitting structures.