In order to miniaturize the bandpass filter, a sheep horn defected ground structure (DGS) is proposed, and a novel wideband bandpass filter is designed and fabricated by combining the sheep horn DGS with coupled open stubs. The centre frequency of the filter is 7.95 GHz, and the 3 dB passband is 5.25 GHz to 10.65 GHz, the relative bandwidth reaches to 68%. This bandpass filter is simpler and smaller compared with previous wideband band pass filter. The measurement result agrees with the simulation result well.
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杨勇,孙利国,漆威,罗运.一种新颖羊角形缺陷地结构宽带带通滤波器[J].压电与声光,2016,38(1):28-31. YANG Yong, SUN Liguo, QI Wei, LUO Yun. A Wideband Bandpass Filter With Novel Sheep Horn DGS[J]. PIEZOELECTRICS AND ACOUSTOOPTICS