Design of Dual-Band Band-Pass Filter Based on Unequal Length Cross Resonator

被引：0
|
作者：
La D.-S. [1 ,2 ]
Guan X. [1 ]
Li Y.-Y. [1 ]
Li H.-C. [1 ]
Guo J.-W. [3 ]
机构：
[1] School of Computer and Communication Engineering, Northeastern University at Qinhuangdao, Qinhuangdao
[2] Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin University of Electronic Technology, Guilin
[3] School of Information Science and Engineering, Yanshan University, Qinhuangdao
来源：
Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications | 2020年 / 43卷 / 04期
关键词：
Dual-band band-pass filter; Transmission pole; Transmission zero; Unequal length cross-shaped resonator;
D O I：
10.13190/j.jbupt.2019-268
中图分类号：
学科分类号：
摘要：
A simple dual-band band-pass filter is proposed. It is composed of an unequal-length cross-shaped resonator and parallel coupled lines feed structures. Due to the symmetry of the filter distribution circuit, the transmission zero and transmission pole are analyzed using the even-odd mode analysis method. The designed filter has 3 transmission zeros and 4 transmission poles. The positions of the transmission zeros do not change with the changing of the impedance parameters. Among 4 transmission poles, the first even-mode transmission pole and the first odd-mode transmission pole constitute the first passband, and the remaining two transmission poles constitute the second passband. Compared with the equal-length cross-shaped filter, this structure has one extra transmission pole. The passband bandwidth can be adjusted by adjusting the position of the transmission poles. Then the physical parameters of the designed filter are given. The simulated results of the designed filter are obtained. Finally, the designed filter is fabricated and measured. Simulations are basically consistent with the measured ones, which verify the correctness of the design theory. © 2020, Editorial Department of Journal of Beijing University of Posts and Telecommunications. All right reserved.
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页码：27 / 31
页数：4
相关论文
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