In this article, a novel filtering crossover with independently tuned channel passbands and reconfigurable filtering power divider (PD) function based on evanescent-mode cavity (EVA) is proposed for the first time. It consists of four substrate-integrated-waveguide (SIW) EVA resonators loaded with piezoelectric actuators for frequency tuning. Four sets of varactors are used between adjacent resonators for control of interstage coupling, whereas four sets of varactors are inserted between ports and resonators for input–output matching. By controlling resonant frequencies of the EVA resonators and coupling coefficients between adjacent resonators, the passbands of the two orthogonal channels in the filtering crossover can be independently tuned in either synchronous or asynchronous fashion within the frequency range of 1.7–2.81 GHz. Meanwhile, by detuning the resonant frequency of one resonator in the crossover, the proposed structure can be reconfigured to become a three-port filtering PD with continuous frequency tuning covering 1.7–2.85 GHz. Moreover, with the independently tuned feature, a filter with reconfigurable filtering PD and diplexer functions can be easily achieved by attaching the proposed crossover to an external matching junction. Several prototypes were given to demonstrate the proposed techniques. Good agreement is obtained between simulated and measured results.

中文翻译：

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具有独立调谐的通道通带和可重新配置的滤波功率分配功能的新型1.7–2.85-GHz滤波分频器

本文首次提出了一种新的具有独立调谐通道通带和基于independently逝模腔（EVA）的可重配置滤波功率分配器（PD）功能的滤波分频器。它由四个基板集成波导（SIW）EVA谐振器组成，该谐振器装有用于频率调谐的压电致动器。在相邻谐振器之间使用四组变容二极管来控制级间耦合，而在端口和谐振器之间插入四组变容二极管以进行输入-输出匹配。通过控制EVA谐振器的谐振频率和相邻谐振器之间的耦合系数，可以在1.7-2.81 GHz的频率范围内以同步或异步方式独立地调谐滤波分频器中两个正交通道的通带。同时，通过使分频器中一个谐振器的谐振频率失谐，可以将所提出的结构重新配置为一个三端口滤波PD，其连续频率调谐范围为1.7–2.85 GHz。此外，借助独立调谐的功能，可以通过将建议的分频器连接到外部匹配结，轻松实现具有可重配置滤波PD和双工器功能的滤波器。给出了几个原型来演示所提出的技术。在模拟结果和测量结果之间取得了良好的一致性。通过将建议的分频器连接到外部匹配结，可以轻松实现具有可重配置滤波PD和双工器功能的滤波器。给出了几个原型来演示所提出的技术。在模拟结果和测量结果之间取得了良好的一致性。通过将建议的分频器连接到外部匹配结，可以轻松实现具有可重配置滤波PD和双工器功能的滤波器。给出了几个原型来演示所提出的技术。在模拟结果和测量结果之间取得了良好的一致性。