Tapped coupling can be used to change the transmission zeros so that the performance of filter is improved.
采用左右对称的输入输出耦合结构便于调整滤波器的传输零点，从而改善带外特性。
The filter has a pair of transmission zeros around the passband, excellent frequency response and frequency selectivity.
该滤波器在通带附近有一对传输零点，具有良好的频率响应以及频率选择特性。
In addition, the stop-band rejection can be further increased by using elliptic filter function which has limited frequency transmission zeros.
另外，在函数类型上使用椭圆函数型，使带外出现有限频率传输零点，进一步提高了带外抑制能力。
The synthesis of the cross coupled filter is from prescribed transmission zeros and return loss till the attainment of the coupling matrix of each cavity.
交叉耦合滤波器的综合从给定的传输零点和回波损耗出发，直到得到各腔体之间的耦合系数。
Flexible topology and coupling structures are used to realize transmission zeros, thereby enhancing the stop band rejection or making more flat group delay.
这种滤波器采用灵活的拓扑结构和耦合结构，可以实现传输零点，从而提高滤波器带外抑制特性，或者使群时延更加平坦。
How to design this filter is a complicated question, and this article will focus on ways to increase the transmission zeros during the design of the Coaxial cavity filters.
而该思想的分析与实现方法一直是设计中的难点，本文在腔体滤波器的优化设计中着重介绍了增加传输零点的方法。
The transmission zeros(TZ) of Quasi-elliptic function filter could be placed in any position, so the attenuation out of band is controllable, then a high selection performance could get.
准椭圆函数滤波器的传输零点，可以位于阻带内的任意位置处，这能更加灵活地对滤波器的带外抑制度进行调节，其矩形系数可以做得很高。
The transmission zeros(TZ) of Quasi-elliptic function filter could be placed in any position, so the attenuation out of band is controllable, then a high selection performance could get.
准椭圆函数滤波器的传输零点，可以位于阻带内的任意位置处，这能更加灵活地对滤波器的带外抑制度进行调节，其矩形系数可以做得很高。
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