Simple Coupled-Line Tunable Bandpass Filter With Wide Tuning Range

被引：7

作者：

Chen, Xiaoxiao ^{[1
]}

Wu, Yongle ^{[1
]}

Yang, Yuhao ^{[1
]}

Wang, Weimin ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China

来源：

IEEE ACCESS | 2020年 / 8卷

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Bandpass filter; coupled line; tunable filter; wide tuning range; PHASE-SHIFTER; HIGH-SELECTIVITY; SHORT-SECTION; BANDWIDTH; DESIGN; IMPEDANCE; TRANSFORMER; FREQUENCY;

D O I：

10.1109/ACCESS.2020.2991163

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a tunable bandpass filter using coupled line with a wide tuning range is proposed. The proposed filter has a simple structure which is composed of a coupled-line section and two pairs of varactors. Meanwhile, simultaneously tuning on bandwidth and center frequency are introduced by varactors. The tunability is mainly realized by varactors connected to one end of the coupled line and varactors between ports and coupled line provide an impedance matching. A theoretical analysis is presented to illustrate the tunability by using even- and odd-mode theory. Additionally, the detailed effect of the two types of varactors is researched, respectively. To verify the concept, a prototype is designed, fabricated, and measured. The transmission zero exhibited in measurement is introduced by bias circuits. The measured results show that the tunable bandpass filter achieves a tunable center frequency of 0.494-1.257 GHz (87.15 & x0025;) and a 3-dB bandwidth of 0.282-0.943 GHz (334 & x0025;).

引用

页码：82286 / 82293

页数：8

共 41 条

[31] A Novel Rat-Race Coupler With Widely Tunable Frequency [J].

Tan, Xiangguan ;

Lin, Feng .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2019, 67 (03) :957-967

[32] Design of the Compact Tunable Filter With Modified Coupled Lines [J].

Tang, Ching-Wen ;

Tseng, Chien-Tai ;

Chang, Shih-Chieh .

IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY, 2014, 4 (11) :1815-1821

[33] A Tunable Bandpass Filter With Modified Parallel-Coupled Line [J].

Tang, Ching-Wen ;

Tseng, Chien-Tai ;

Chang, Shih-Chieh .

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2013, 23 (04) :190-192

[34] Varactor-Tuned Compact Dual-Mode Tunable Filter With Constant Passband Characteristics [J].

Tsai, Han-Yun ;

Huang, Ting-Yi ;

Wu, Ruey-Beei .

IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY, 2016, 6 (09) :1399-1407

[35] A Tunable Combline Bandpass Filter Loaded With Series Resonator [J].

Wang, Xu-Guang ;

Cho, Young-Ho ;

Yun, Sang-Won .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2012, 60 (06) :1569-1576

[36] A NOVEL HIGH-POWER AMPLIFIER USING A GENERALIZED COUPLED-LINE TRANSFORMER WITH INHERENT DC-BLOCK FUNCTION [J].

Wu, Y. ;

Liu, Y. ;

Li, S. ;

Li, S. .

PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER, 2011, 119 :171-190

[37] NEW COUPLED-LINE DUAL-BAND DC-BLOCK TRANSFORMER FOR ARBITRARY COMPLEX FREQUENCY-DEPENDENT LOAD IMPEDANCE [J].

Wu, Yongle ;

Liu, Yuanan ;

Li, Shulan ;

Yu, Cuiping .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2012, 54 (01) :139-142

[38] A Coupled Line-Based Coupler With Simultaneously Tunable Phase and Frequency [J].

Xu, Bo Wei ;

Zheng, Shao Yong ;

Wang, Wei Min ;

Le Wu, Yong ;

Liu, Yuan An .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2019, 66 (12) :4637-4647

[39] Compact Tunable Bandpass Filter With Tuning Range of Centre Frequency and Bandwidth Using Short Coupled Lines [J].

Zhang, Gang ;

Xu, Yanhui ;

Wang, Xuedao .

IEEE ACCESS, 2018, 6 :2962-2969

[40] High-Selectivity Tunable Balanced Bandpass Filter With Constant Absolute Bandwidth [J].

Zhou, Wen-Jun ;

Chen, Jian-Xin .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2017, 64 (08) :917-921

← 1 2 3 4 5 →