摘要
本文提出了一种新颖的微带双通带带通滤波器的设计方法。该微带双通带滤波器由两个中心频率不同的滤波器组成,并采用耦合线实现外部耦合。设计中引入源与负载之间的耦合,得到了额外的有限频率传输零点,改善了滤波器的衰减特性。通过调节源与负载之间耦合的强弱,可以适当地调节传输零点的位置。经设计并加工了一款4阶微带开环结构双通带滤波器,实测响应与仿真响应吻合较好,验证了该方法的有效性。
A novel design method for microstrip dual bandpass filters is presented. The microstrip dual bandpass filter is comprised of two individual filters with different center frequencies and its external coupling is implemented by using coupling line. Moreover, the coupling between the source and the load is introduced to achieve some addi- tional finite frequency transmission zero points and improve the attenuation characteristic of the filter. The transmis- sion position of zero point can be adjusted suitably by adjusting magnitude of the source - load coupling. A four - order microstrip open - loop dual - bandpass filter has been designed and fabricated. The measured responses are in good agreement with the simulated ones and this verifies the effectiveness of the method.
出处
《火控雷达技术》
2009年第4期91-94,共4页
Fire Control Radar Technology
基金
国家自然科学基金资助项目(60571059)
关键词
微带双通带带通滤波器
源载耦合
耦合矩阵
microstrip dual bandpass filters
sourced-load coupling
coupling matrix
