A Novel Tunable LC Bandpass Filter with Constant Bandwidth based on Magnetic Dominant Mixed Coupling

被引：0

作者：

Liu L. ^{[1
]}

Xiang Q.-Y. ^{[1
]}

Jia D. ^{[2
]}

Huang X. ^{[3
]}

Feng Q. ^{[1
]}

机构：

[1] School of Information Science and Technology, Southwest Jiaotong University, Chengdu

[2] Ceyear Technologies Co., Ltd, Qingdao

[3] Science and Technology on Communication Information Security/Control Laboratory, Jiaxing

来源：

Progress in Electromagnetics Research Letters | 2022年 / 103卷

基金：

中国国家自然科学基金;

关键词：

Magnetism - Passive filters - Bandwidth;

D O I：

10.2528/PIERL22020301

中图分类号：

学科分类号：

摘要：

In this paper, a novel tunable LC bandpass filter (BPF) based on LC magnetic-dominant mixed coupling is proposed. The design equations for the coupling coefficient and resonating frequency are given. The magnetic dominant coupling region and electric dominant coupling region are studied. The magnetic-dominant mixed coupling is used to compensate the bandwidth of the tunable filter, so that the tunable filter with constant absolute bandwidth can be obtained. The filter is designed, simulated, and measured, and the measurement matches the simulation very well. The measurement shows that the central frequency tuning range is from 72 MHz to 222 MHz with −3 dB bandwidth of 16.5 ± 3.5 MHz. © 2022, Electromagnetics Academy. All rights reserved.

引用

页码：73 / 79

页数：6

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