Design of Filtering Crossover Based on 180° Filtering Couplers

Qiang Shao; Ning Yang; Rui Sen Chen; Guan Long Huang; Fu Chang Chen; Yi Wang

doi:10.1109/TCPMT.2023.3347666

Design of Filtering Crossover Based on 180° Filtering Couplers

Qiang Shao, Ning Yang, Rui Sen Chen, Guan Long Huang^*, Fu Chang Chen, Yi Wang

^*Corresponding author for this work

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

This article presents a novel crossover with an embedded bandpass filter function. The crossover is derived from the traditional crossover based on a tandem connection of two 3-dB 90° couplers by substituting them with 180° filtering couplers and introducing a filter function. In addition, a 180° phase shift realized by coupled resonators is added to keep the two cross paths in phase. The equivalent circuit of the crossover between the two diagonal ports has been treated as bandpass filters with coupled resonators. The design equations are derived to assist with the synthesis process for the filtering crossover. For verification, a filtering crossover with fifth-order filter characteristics, operating at 2.4 GHz, is designed, fabricated, and tested. The measured results match very well with the simulation, which verifies the proposed circuit concept.

Original language	English
Pages (from-to)	309-314
Number of pages	6
Journal	IEEE Transactions on Components, Packaging and Manufacturing Technology
Volume	14
Issue number	2
Early online date	26 Dec 2023
DOIs	https://doi.org/10.1109/TCPMT.2023.3347666
Publication status	Published - Feb 2024

Bibliographical note

Funding Agency:
10.13039/501100021171-Basic and Applied Basic Research Foundation of Guangdong Province (Grant Number: 2021A1515110432 and 2021A1515110629)
Open Funding of Guangdong Provincial Key Laboratory of Short-Range Wireless Detection and Communication
10.13039/501100012245-Science and Technology Planning Project of Guangdong Province (Grant Number: 2022A0505050010)

Keywords

Bandpass filter
crossover
filtering coupler
stripline

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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Cite this

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abstract = "This article presents a novel crossover with an embedded bandpass filter function. The crossover is derived from the traditional crossover based on a tandem connection of two 3-dB 90° couplers by substituting them with 180° filtering couplers and introducing a filter function. In addition, a 180° phase shift realized by coupled resonators is added to keep the two cross paths in phase. The equivalent circuit of the crossover between the two diagonal ports has been treated as bandpass filters with coupled resonators. The design equations are derived to assist with the synthesis process for the filtering crossover. For verification, a filtering crossover with fifth-order filter characteristics, operating at 2.4 GHz, is designed, fabricated, and tested. The measured results match very well with the simulation, which verifies the proposed circuit concept.",

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AU - Chen, Fu Chang

AU - Wang, Yi

N1 - Funding Agency: 10.13039/501100021171-Basic and Applied Basic Research Foundation of Guangdong Province (Grant Number: 2021A1515110432 and 2021A1515110629) Open Funding of Guangdong Provincial Key Laboratory of Short-Range Wireless Detection and Communication 10.13039/501100012245-Science and Technology Planning Project of Guangdong Province (Grant Number: 2022A0505050010)

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AB - This article presents a novel crossover with an embedded bandpass filter function. The crossover is derived from the traditional crossover based on a tandem connection of two 3-dB 90° couplers by substituting them with 180° filtering couplers and introducing a filter function. In addition, a 180° phase shift realized by coupled resonators is added to keep the two cross paths in phase. The equivalent circuit of the crossover between the two diagonal ports has been treated as bandpass filters with coupled resonators. The design equations are derived to assist with the synthesis process for the filtering crossover. For verification, a filtering crossover with fifth-order filter characteristics, operating at 2.4 GHz, is designed, fabricated, and tested. The measured results match very well with the simulation, which verifies the proposed circuit concept.

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Design of Filtering Crossover Based on 180° Filtering Couplers

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this