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A NOVEL DUAL-BAND SIW FILTER WITH HIGH SELECTIVITY
摘要： A novel dual-band substrate integrated waveguide (SIW) ?lter with multiple transmission zeros and good out-of-band rejection performance is presented in this paper. For this purpose, an orthogonal input/output (I/O) feeding structure directly connected to the substrate integrated waveguide (SIW) cavity is designed to split the resonant frequencies of the degenerate pair of mode. The ?lter can be modeled with a multi-path circuit formed by three modes (TE101, TE201 and TE102 modes) and weak cross coupling between I/O ports, thereby producing three transmission zeros which make the dual-band high selectivity. The o?set of the input/output ports shifts the second transmission zero to a lower frequency from the upper passband. Several ?lter prototypes are designed and fabricated for demonstration, and the measured results validate the new structure for high selectivity applications.
关键词： high selectivity,substrate integrated waveguide (SIW),dual-band,orthogonal input/output feeding structure,transmission zeros
更新于2025-09-04 15:30:14
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A COMPACT TRIPLE-MODE BANDPASS HMSIW FILTER
摘要： A simple method for designing a triple-mode bandpass ?lter is presented in this paper. Triple-mode is achieved by using half-mode substrate integrated waveguide (HMSIW) cavity. Three perturbation metal vias were introduced for shifting resonant modes. The resonant frequencies of these modes can be adjusted by the location and the diameter of perturbation vias properly. In order to improve the out-of-band rejection, the CPW-to-SIW transition was added. A triple-mode HMSIW ?lter with the center frequency of 13 GHz was designed and fabricated. The measured fractional bandwidth is 35% with a transmission zero located at 20.4 GHz. Good agreement is observed between simulation and measurement.
关键词： perturbation vias,triple-mode bandpass filter,HMSIW,CPW-to-SIW transition
更新于2025-09-04 15:30:14