Miniaturized independent controllable dual-band bandpass filter by using transversal signal interference concepts-Reference-Cited by-同舟云学术

Miniaturized independent controllable dual-band bandpass filter by using transversal signal interference concepts

Published:2024-06-10 Issue:9-10 Volume:78 Page:389-396
ISSN:0016-1136
Container-title:Frequenz
language:en
Short-container-title:

Author:

Wang Li-Tian¹,Li Yu-Qi¹,Zhang Hong-Yuan¹,Chen Xuan¹,Qian Li-Rong¹,Li Cui-Ping¹,Li Dan²³,Xiong Yang¹

Affiliation:

1. Tianjin Key Laboratory of Film Electronic & Communication Devices, School of Integrated Circuit Science and Engineering , 66346 Tianjin University of Technology , Tianjin , 300384 , China

2. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering , 66346 Tianjin University of Technology , Tianjin 300384 , China

3. 66346 National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology) , Tianjin 300384 , China

Abstract

Abstract This paper presents and validates a compact dual-band bandpass filter with independent controllable passbands and isolation. The proposed filter is constructed by two transmission paths from input port to output port. Based on the transversal cancellation mechanism of two transmission paths, dual passband with independent controllable characteristics can be approached. The transversal cancellation techniques yield extra transmission zeros, which are located at 2.56 GHz, 3.58 GHz and 4.43 GHz respectively. Therefore, two passbands centered at 2.25/3.9 GHz are divided by triple transmission zeros. These transmission zeros also improve the out-of-band suppression performance of proposed filter. The designed prototype filter is implemented and tested, the measured 3 dB passband fractional bandwidths are 12.4 % and 7.5 %, respectively, and the minimum insertion losses are 0.48 dB and 0.88 dB respectively. Additionally, the dual-band transversal filter only occupies 0.012 λ g 2

${\lambda }_{g}^{2}$

, which λ g is the guided wavelength at 50 Ω microstrip line at 2.25 GHz.

Publisher

Walter de Gruyter GmbH

Link

https://www.degruyter.com/document/doi/10.1515/freq-2023-0451/pdf

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