Design of 2-D 180° Filtering Couplers Based on All-Resonator Structures

IEEE Microwave and Wireless Technology Letters 2026 Open access

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Authors: Qiang Shao, Yin-Tong Liu, Rui‐Sen Chen, Guan‐Long Huang, Fu‐Chang Chen, Yi Wang, Mustafa K. Taher Al‐Nuaimi
DOI: 10.1109/lmwt.2026.3657719
Cited by: 0

Abstract

In this letter, a novel 2-D 180° filtering coupler based on all-resonator structures is proposed. The 2-D 180° filtering coupler, composed of four 1-D 180° filtering couplers, achieves phase shifts in two dimensions with an inherent bandpass filter function. The comprehensive design methodology and synthesis approach for the 2-D filtering coupler are presented. For experimental verification, an example of a 2-D 180° coupler with fourth-order filter response is devised, manufactured, and tested. Excellent alignment is achieved between the simulation and test outcomes, which indicates the correctness of the design method.

Fields of Study & Subjects

Microwave Engineering and Waveguides Microwave and Dielectric Measurement Techniques Radio Frequency Integrated Circuit Design

Publication details

Journal / source
IEEE Microwave and Wireless Technology Letters
Volume
36
Issue
5
Pages
701–704
Publication date
3 February 2026
Language
EN