A compact half-mode substrate integrated waveguide filter based on a circular resonator

In this paper, a compact Ultra-WideBand (UWB) filter is presented. The filter is based on a Half Mode Substrate Integrated Waveguide (HM-SIW) with a circular resonator. The proposed filter operates at the fundamental mode and is designed to be resonating at 4.4GHz with a bandwidth (BW) of 2100MHz. The simulation results show that the filter has an insertion loss (IL) of 1.65dB.