一种新型微带Hairpin带通滤波器的设计

Design of A New Microstrip Hairpin Bandpass Filter

通过在Hairp in滤波器的非相邻谐振间并联一段长度为λ0/2奇数倍的微带线使得在滤波器的通带两侧产生一对传输零点,构成一种新的微带Hairp in带通滤波器。该类滤波器的设计避免了交叉耦合带通滤波器求解耦合系数的复杂过程。最后给出了该类型滤波器的设计实例,仿真、测试结果证实了设计方法的正确性。

A new configuration of microstrip Hairpin bandpass filter is presented. A microstrip line is added between non-adjacent resonators of the Hairpin bandpass filter, which makes the filter has a pair of transmission zeros around the passband. The design method doesnt require the complex procedure of calculating the coupling coeffient of the filter, which has transmission zeros between the passband obtained by cross coupling. At the end of the paper, a new microstrip hairpin bandpass filter which has a pair of transmission zeros between the pass band is designed . The result of the simulation and measurement has proved the method validity.