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提出了一种新的EBG单元结构,为了进一步提高带阻滤波器的带阻特性,还引入了马刺线的设计。仿真分析了基于该EBG单元结构设计的微带带阻滤波器传输特性与单元结构几何尺寸的关系,对比分析了带有马刺线和不带有马刺线的测试结果。研究结果表明,马刺线的引入可使滤波器阻带深度提高约45dB,5个EBG单元构成的带阻滤波器阻带深度达70dB,而通带特性基本不变。
A new structure of EBG cell is proposed. In order to further improve the band-stop characteristic of the band-stop filter, a spur line design is also introduced. The relationship between the transmission characteristics of the microstrip band-stop filter and the geometric dimensions of the cell structure based on the design of the EBG cell structure was simulated and analyzed. The test results with and without the spurs were compared. The results show that the introduction of the spurs can increase the filter stopband depth by about 45dB, and the band stopband of the 5 EBG elements can reach 70dB, while the passband characteristics remain unchanged.