Wide stopband compact microstrip quadruplexer using common crossed resonator

被引：0
作者：
Qian J.-F. [1 ]
Chen F.-C. [1 ]
机构：
[1] School of Electronic and Information Engineering, South China University of Technology, Guangzhou
来源：
Progress in Electromagnetics Research Letters | 2018年 / 73卷
基金：
中国国家自然科学基金;
关键词：
Natural frequencies - Bandpass filters;
D O I：
10.2528/pierl17112205
中图分类号：
TN713 [滤波技术、滤波器];
学科分类号：
摘要：
A compact size and wide stopband microstrip quadruplexer with a common crossed resonator is proposed in this paper. The resonator mentioned is theoretically analyzed and proved to be able to resonate at three different frequencies. The resonant frequencies can be easily modified by changing the length of the corresponding stub of the resonator. This tri-mode resonator is proved to have the capacity of being shared by three different bandpass filters in a quadruplexer in this paper. Then an additional channel is designed to be coupled to the other side of the feed line of the common input port. Compared to conventional ones, the proposed quadruplexer has a more compact structure, since no extra matching network is needed, and the number of resonators is reduced effectively. Moreover, a wide stopband is obtained by making the resonators work at the same fundamental frequencies but different higher order frequencies. Besides, open circuit stubs are also used to suppress the harmonic frequencies. To demonstrate the design procedure, a quadruplexer with a third order Chebyshev response in each channel is fabricated and measured. The measured result is in good agreement with the simulated one, showing an attenuation of 20 dB up to 10.2 times of the first channel frequency. © 2018, Electromagnetics Academy. All rights reserved.
引用
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页码：69 / 75
页数：6
相关论文
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