Synthesis of adoubly terminated passive complex filter

在本研究中，合成了一种双端复数滤光器。由于所提出的电路只包含无源元件，因此在较宽的频率范围内具有良好的频率响应。所提出的电路是通过结合两个频率变换实现的。由此产生的电路有终端电阻、电容器和松散耦合的变压器，在两个绕组上都有损耗。作为例子，设计了一个三阶复数滤波器，并通过计算机仿真和实验验证了该电路的有效性。

In this study, a doubly terminated complex filter was synthesized. Because the proposed circuit includes passive components only, it has a good frequency response over the wide frequency range. The proposed circuit is realized by combining two frequency transformations. The resulting circuit has terminating resistors, capacitors and loosely coupled transformers with dissipation on both windings. As an example, a third-order complex filter was designed and the validity of the proposed circuit was confirmed through computer simulation and experiment.