直角耦合结构的宽阻带SIW 滤波器

doi:10.3969/j.issn.1007-2861.2013.07.033

Abstract

Abstract: A wide stopband filter based on substrate integrated waveguide (SIW) is proposed. Using a right-angle coupling structure, the filter has two transmission zeros (TZs) in the upper stopband. These TZs are located near the resonant frequencies of the two different second-order modes (TE102/TE201), respectively. To further improve the stopband performance, two rectangular slots are etched on the top metal layer of the SIW. The insertion loss is approximately 1.9 dB at the center frequency of 10 GHz. The return loss in the passband is more than 20 dB. The stopband attenuation within 10.518.8 GHz is better than 20 dB, and the second harmonic response is effectively inhibited. Compared with the traditional bandpass filter based on SIW, the stopband bandwidth of this filter is widened by 48%. Measured results well agree with numerical simulations.

Key words: right-angle coupling, substrate integrated waveguide (SIW), transmission zeros (TZs), bandpass filter, wide stopband

CLC Number:

TN 713

REN Long1,2, MENG Ling-qin1,2, ZHU Jun-hao1, ZHOU Jing-chao1, LIU Jie1. Wide Stopband SIW Filter with Right-Angle Coupling Structure[J]. Journal of Shanghai University（Natural Science Edition）, 2014, 20(4): 466-471.

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Wide Stopband SIW Filter with Right-Angle Coupling Structure

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