Compact dual-band narrowband bandpass filter with small frequency ratio-Reference-Cited by-同舟云学术

Compact dual-band narrowband bandpass filter with small frequency ratio

Published:2023-04-06 Issue:9-10 Volume:77 Page:519-524
ISSN:0016-1136
Container-title:Frequenz
language:en
Short-container-title:

Author:

Xi Shangjing¹,Guo Jianying²,Jiang Yannan³,Xu Kai-Da¹^ORCID

Affiliation:

1. School of Information and Communications Engineering, Xi’an Jiaotong University , Xi’an , China

2. Puyang Vocational and Technical College , Puyang 457000 , China

3. Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin University of Electronic Technology , Guilin , China

Abstract

Abstract A compact but very simple dual-band bandpass filter (BPF) based on just five pairs of coupled lines is designed in this paper. It can be examined using the even- and odd-mode method because of its symmetry structure. Six transmissions zeros (TZs) can be obtained and calculated by using input impedance analysis. For demonstration, a dual-band narrowband BPF example with center frequencies at 0.94 and 1.12 GHz is fabricated and measured. The 3-dB fractional bandwidths of two passbands are 2% (0.93–0.95 GHz) and 3.4% (1.1–1.14 GHz), whose frequency ratio of upper-band to lower-band is very small. The measurement results agree with the simulation results, confirming the design process.

Funder

opening project of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing

NSAF Joint Fund

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering

Link

https://www.degruyter.com/document/doi/10.1515/freq-2022-0272/pdf

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