Half-Mode Substrate Integrated Waveguide Band Pass Filter Integrated with Fractal DGS for SATCOM Applications

A selective substrate integrated waveguide (SIW) band pass filter (BPF) with a wide upper stop band for satellite communication (SATCOM) applications in C band is proposed in this paper. The design consists of comb-shaped slots engraved on half-mode SIW. Its performance is further enhanced by applying the first and second iteration of Minkowski fractal curve in the ground plane as defected ground structure (DGS). The filter is simulated on 0.062″ (1.6 mm) FR4 with dielectric constant, ɛr = 4.4 using commercial full-wave electromagnetic simulator HFSS v19. Simulated results demonstrate that BPF has resonant frequency (f0) of 4.9 GHz and possesses a wide and deep (> 22 dB) stop band.