Dual-Band Branch-Line Coupler Based on Crossed Lines for Arbitrary Power-Split Ratios

Hyungjun Chang; Taejun Lim; Kristian Chavdarov Dimitrov; Yongshik Lee

doi:10.3390/s22155527

Dual-Band Branch-Line Coupler Based on Crossed Lines for Arbitrary Power-Split Ratios

Hyungjun Chang, Taejun Lim, Kristian Chavdarov Dimitrov, Yongshik Lee

Department of Electrical and Electronic Engineering

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

1 Citation (Scopus)

Abstract

Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to independently provide different power-split ratios to the two bands. Additionally, open stubs are utilized to enhance the stopband responses. The complete design procedure with example design curves is provided. For experimental verification, three dual-band couplers with power-split ratio combinations of +3 dB ((Formula presented.)) and −3 dB ((Formula presented.)), −3 dB and +3 dB, and 0 dB ((Formula presented.)) and +13 dB ((Formula presented.)) at 1 GHz and 2.5 GHz were designed and fabricated. The measured results are in excellent agreement with the ideal and full-wave simulated results. The measured difference of −13.3 dB between the power-split ratios of the two bands is the largest reported for a dual-band branch-line coupler.

Original language	English
Article number	5527
Journal	Sensors
Volume	22
Issue number	15
DOIs	https://doi.org/10.3390/s22155527
Publication status	Published - 2022 Aug

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C1010251).

Publisher Copyright:
© 2022 by the authors.

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Information Systems
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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title = "Dual-Band Branch-Line Coupler Based on Crossed Lines for Arbitrary Power-Split Ratios",

abstract = "Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to independently provide different power-split ratios to the two bands. Additionally, open stubs are utilized to enhance the stopband responses. The complete design procedure with example design curves is provided. For experimental verification, three dual-band couplers with power-split ratio combinations of +3 dB ((Formula presented.)) and −3 dB ((Formula presented.)), −3 dB and +3 dB, and 0 dB ((Formula presented.)) and +13 dB ((Formula presented.)) at 1 GHz and 2.5 GHz were designed and fabricated. The measured results are in excellent agreement with the ideal and full-wave simulated results. The measured difference of −13.3 dB between the power-split ratios of the two bands is the largest reported for a dual-band branch-line coupler.",

author = "Hyungjun Chang and Taejun Lim and Dimitrov, {Kristian Chavdarov} and Yongshik Lee",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C1010251). Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = aug,

doi = "10.3390/s22155527",

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journal = "Sensors",

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AU - Chang, Hyungjun

AU - Lim, Taejun

AU - Dimitrov, Kristian Chavdarov

AU - Lee, Yongshik

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C1010251). Publisher Copyright: © 2022 by the authors.

PY - 2022/8

Y1 - 2022/8

N2 - Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to independently provide different power-split ratios to the two bands. Additionally, open stubs are utilized to enhance the stopband responses. The complete design procedure with example design curves is provided. For experimental verification, three dual-band couplers with power-split ratio combinations of +3 dB ((Formula presented.)) and −3 dB ((Formula presented.)), −3 dB and +3 dB, and 0 dB ((Formula presented.)) and +13 dB ((Formula presented.)) at 1 GHz and 2.5 GHz were designed and fabricated. The measured results are in excellent agreement with the ideal and full-wave simulated results. The measured difference of −13.3 dB between the power-split ratios of the two bands is the largest reported for a dual-band branch-line coupler.

AB - Dual-band branch-line couplers with arbitrary power-split ratios are presented. The use of crossed lines at the center of the dual-band coupler enables it to independently provide different power-split ratios to the two bands. Additionally, open stubs are utilized to enhance the stopband responses. The complete design procedure with example design curves is provided. For experimental verification, three dual-band couplers with power-split ratio combinations of +3 dB ((Formula presented.)) and −3 dB ((Formula presented.)), −3 dB and +3 dB, and 0 dB ((Formula presented.)) and +13 dB ((Formula presented.)) at 1 GHz and 2.5 GHz were designed and fabricated. The measured results are in excellent agreement with the ideal and full-wave simulated results. The measured difference of −13.3 dB between the power-split ratios of the two bands is the largest reported for a dual-band branch-line coupler.

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Dual-Band Branch-Line Coupler Based on Crossed Lines for Arbitrary Power-Split Ratios

Abstract

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