基于谐振环结构的谐波抑制功分器设计

Design of Harmonic Suppression Power Divider Based on Resonant Ring Structure

传统威尔金森功分器具有低插入损耗和高隔离的优点,却无法对谐波进行抑制。本文通过将传统威尔金森功分器的核心转换电路替换成具有带阻滤波性能的谐振环电路,并在输入端口与带阻滤波器级联实现抑制二三次谐波的目的。通过对功分器核心电路的等效替换,使得整体系统实现了多功能化,减小了系统的成本,并在一定程度上提高了系统性能。通过仿真和实物测量表明,此功分器在工作频率2.4GHz的S21=-3.07dB,在二次谐波和三次谐波的抑制分别可以达到-27dB和-60dB。功分器各个端口反射良好并且输出端口可实现良好隔离。

The traditional Wilkinson power divider has the advantages of low insertion loss and high isolation, but it can not suppress harmonics. In this paper, the traditional Wilkinson power divider's core conversion circuit is replaced by a resonant ring circuit with band stop filter performance, and the input port and the band stop filter are cascaded to achieve the purpose of suppressing the second or third harmonic. Through the equivalent replacement of the core circuit of the power divider, the whole system is realized with multiple functions, the cost of the system is reduced, and the system performance is improved to a certain extent. Through the simulation and actual measurement show that this power divider in the working frequency of 2.4GHz S21=-3.07 dB, the inhibition of the two harmonic and three harmonics can reach -27 dB and -60 dB respectively. Each port of the power divider is well reflected and the output port can be well isolated