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A single-cavity dual-mode substrate integrated waveguide (SIW) bandpass filter (BPF) for X-band application is presented in this paper. Coplanar waveguide (CPW) is used as SIW-microstrip transition in this design. Two slots of the CPW with unequal lengths are used to excite two degenerate modes, i.e. TE102 and TE201. A slot line is etched on the ground plane of the SIW cavity for perturbation. Its...
A novel substrate integrated waveguide bandpass filter with circular cavity is proposed in this paper. Two circular cavities based on Substrate Integrated Waveguide are connected via connect hole. The width of the hole can control the coupling between resonators. Two different complementary Split Ring Resonators are loaded at input and output feed line to produce transmission zeros and improve the...
A capacitive loaded quasi-elliptic function microstrip filter on GSM-R with the bandwidth of 4 MHz, the fractional bandwidth <0.5%, are designed. To demonstrate the proposed design, a four-order capacitive loaded quasi-elliptic function bandpass filter was designed and fabricated.
A class of microstrip bandpass quasi-elliptic function filters with the bandwidth of 4 MHz and the fractional bandwidth < 0.5% are designed, fabricated and tested at GSM-R band in this paper. At last, analyze the discrepancy between the simulated results and the tested ones.
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