Microwave bandpass filter based on modified square ring and dumbbell shaped resonator for UWB applications

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI:10.1016/j.aeue.2025.155682

Partha Protim Kalita , Gouree Shankar Das , Akash Buragohain , Yatish Beria , Trishna Doloi

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引用次数: 0

Abstract

An ultra-wideband (UWB) microstrip bandpass filter is designed and developed on a low-cost FR4 substrate with a dimension of 1.15λ_g × 0.38λ_g × 0.06λ_g. The filter has been designed using ANSYS High Frequency Structure Simulator (HFSS) electromagnetic (EM) software. It is based on a modified stepped impedance square ring resonator excited by quarter wavelength interdigital parallel coupled microstrip lines (PCML) on both ends to obtain UWB performance. Two dumbbell-shaped resonators and rectangular defected ground structures (DGS) are introduced to get a sharper transition from passband to stopband and to minimize the insertion loss respectively. Due to the symmetric structure of the filter, it is analyzed using odd–even mode analysis to find the resonant mode. To validate the EM simulated results, a lumped element equivalent circuit has been proposed. Further, the fabricated filter has been tested using Vector Network Analyzer (VNA) and the passband of the filter is found to be from 2.98 GHz to 9.59 GHz with a fractional bandwidth of 105.2 % and a minimum insertion loss of 0.38 dB. High return loss of −20.4 dB is observed with a group delay variation of 0.36 ns throughout the passband. The proposed filter is suitable for UWB applications like high-speed wireless communication and radar applications.

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.