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A novel fourth-order substrate integrated waveguide (SIW) transversal filter with triple-mode microstrip resonator is presented. The triple-mode resonator is etched on the top metal layer of SIW cavity, so compact size can be achieved. The coupling scheme of filter exhibits transversal characteristic, and the design principle of the filter is simple. The filter has compact size and wide stopband in...
An extended doublet bandpass filter with compact size and good spurious suppression characteristic is proposed, where a dual-mode microstrip resonator and a single-mode substrate integrated waveguide (SIW) cavity are utilized. The relationship between the location of its transmission zeros and the impedance ratio of the microstrip resonator is analyzed theoretically. Our proposed SIW filter only occupies...
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