Novel multi-band filter design and Substrate Integrated Waveguide filter realization

Novel dual-band band-stop filter coupling networks are introduced in the paper. Based on the topology, the design of dual-band, triple-band and four-band band-stop filters are firstly proposed and synthesized. The entire multi-band band-stop filter can be designed on the bases of several Chebyshev filters, which is easy to be realized with a good property. By using Substrate Integrated Waveguide (SIW), a dual-band band-stop filter is first designed and fabricated. The test results agree well with the simulated ones and have a good performance.