电子元件与材料2018，Vol.37Issue(5)：73-76,4.DOI:10.14106/j.cnki.1001-2028.2018.05.013
基于SIR的准椭圆函数微带带通滤波器设计
Design of quasi-elliptic microstrip bandpass filter based on SIR
摘要
Abstract
A microstrip bandpass filter with quasi-elliptic function response based on SIR was proposed for the first time. With two opened half-wavelength SIRs side-coupled to I/O feed lines, the realized filter response possesses two transmission zeros in stopband which improve the stopband rejection, first spurious rejection and selectivity, but the circuit size is almost not increased. The effective overall circuit only occupies 16 mm×3.32 mm, about 0.45λg×0.093λg, where λgis the guided wavelength at the passband centre frequency. The simulated and measured results show that the bandstop filter has a centre frequency of 4.95 GHz. The minimum insertion loss is 1.6 dB. The two transmission zeros are located at 2.34 GHz and 6.3 GHz. The stopband rejections are better than 40 dB and 35 dB near the lower stopband and upper stopband, respectively. The first spurious rejection is better than 25 dB. The bandwidth of upper stopband better than 20 dB is 9 GHz.关键词
SIR/边缘耦合/滤波器/准椭圆函数/高选择性/高阻带抑制Key words
SIR/side-couple/filter/quasi-elliptic/high selectivity/high stopband rejection分类
信息技术与安全科学引用本文复制引用
刘凯正,刘仕琴,向天宇,郑晓缘,雷涛..基于SIR的准椭圆函数微带带通滤波器设计[J].电子元件与材料,2018,37(5):73-76,4.基金项目
贵州省科学技术基金计划项目(黔科合基础[2016]1108) （黔科合基础[2016]1108）
贵州省科学技术基金项目(黔科合LH字[2014]7048) （黔科合LH字[2014]7048）
