Abstract:This brief presents a fourth‐order hybrid coaxial bandpass filter, which is fabricated using Stereolithography 3‐D printing. The filter is designed to operate at a center frequency of 2 GHz, with a bandwidth of 40 MHz, a Chebyshev response and two symmetrical transmission zeros at 1.96 GHz and 2.04 GHz to achieve a better frequency selectivity. Usually in coaxial cavity filter design, the main‐line couplings and cross couplings are realized using coupling irises or probes. However, in the filter presented here… Show more
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