Abstract
This paper presents a novel partial H-plane bandpass filter based on substrate integrated folded waveguide (SIFW), which employs H-plane slot of open-ended evanescent waveguide as admittance inverter. In order to validate the new proposed topology, a three-pole narrowband bandpass filter is designed and fabricated using standard printed circuit board process. The tapered line is used as transition between SIFW and microstrip for easy integration and measurement. The filter is considerably smaller than its metallic waveguide counterpart. The measured results are in good agreement with simulated results.
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