摘要
基于微带方形环谐振器,采用一种新的微扰方式来实现奇偶模分裂,并对其模式分裂机制进行分析。采用阶梯阻抗微带线结构实现输入/输出与双模谐振器之间的强耦合,构成了宽带带通滤波器。测试结果表明,该滤波器中心频率为4.9 7 G H z,通带内最小插损为1.3 3 d B,3 d B相对带宽为2 4.7 5%,并且具有准椭圆函数响应,改善了阻带抑制特性。
A novel perturbation method was adopted to split odd-mode and even-mode based on the microstrip square ring resonator, and the mechanism of the mode splitting was analyzed. A wideband bandpass filter was structured by using stepped impedance microstrip line to achieve strong coupling between the input/output （I/O） and the dual-mode resonator. The measure results show that the center frequency of the filter is 4.97 GHz, the minimum insertion loss is 1.33 dB in passband, 3 dB fractional bandwidth is 24.75%. Meanwhile, the filter possesses a quasi-elliptic function response which improves the stopband rejection characteristic.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2014年第9期62-65,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.60666001)
贵州省农业攻关资助项目(No.黔科合NY字[2011]3107)
关键词
宽带带通滤波器
双模
微带线
方形环谐振器
奇偶模方法
阶梯阻抗线
wideband bandpass filter
dual-mode
microstrip line
square ring resonator
odd-even mode method
stepped impedance line
