Design of Substrate Integrated Waveguide Pass Filter at [33-75] GHz Band

This article presented the design of two filters SIW (Substrate Integrated Waveguide) in two different bands. Their conceptions were made by two different topologies. The first SIW filter with circular inductive post in the band [33-50] GHz on an RT / Duroid 5880 substrate permittivity 2.2, the simulated results of this filter have shown that the insertion loss lower than -0.4 dB within 3.5% bandwidth around 41.7 GHz and the return loss is better than -15 dB between 41.1 GHz and 42.4 GHz. The second SIW filter with iris in the band [50-75] GHz on an NY9217 (IM) substrate permittivity 2.17, the simulated results of this filter have shown that the insertion loss lower than -0.35 dB within 19% bandwidth around 62 GHz and the return loss is better than -15 dB between 60 GHz and 66.3 GHz. The compatibility with planar circuits is provided via a specific microstrip transition (microstrip tapered transitions). Keyword-Rectangular Waveguide, Substrate Integrated Waveguide, Microwave Filters, Transition, SIW-Microstrip Technology