Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures

Chih Chun Chang; Yu Chung Wang; Yi Chen Lin; Kuo Sheng Chin

doi:10.1109/APMC.2015.7413349

Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures

Chih Chun Chang, Yu Chung Wang, Yi Chen Lin, Kuo Sheng Chin

Chang Gung University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

This paper presents a dual-band quadrature coupler with a cascaded coupled-line structure. Conventionally, the parallel coupled lines with an electrical length of 90° only operate at a single frequency. The proposed design achieves dual-band operation by cascading three coupled-line sections with appropriate electrical lengths, which has the advantage of high frequency ratio. The design strategy was validated by designing an experimental dual-band quadrature coupler. The measured results show excellent dual-band performance of-10.6 and-10.8 dB coupling level at 0.84 and 5.17 GHz with bandwidths of 47.6% and 9.1%, respectively. The measured return loss and isolation were better than-18 and-22 dB, respectively, and a phase difference of 90.5° and-88.5° at the dual center frequencies between the two output ports.

Original language	English
Title of host publication	2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015
Editors	Fan Meng, Wei Hong, Guang-Qi Yang, Zhe Song, Xiao-Wei Zhu
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479987658
DOIs	https://doi.org/10.1109/APMC.2015.7413349
State	Published - 2015
Event	2015 Asia-Pacific Microwave Conference, APMC 2015 - Nanjing, China Duration: 06 12 2015 → 09 12 2015

Publication series

Name	Asia-Pacific Microwave Conference Proceedings, APMC
Volume	3

Conference

Conference	2015 Asia-Pacific Microwave Conference, APMC 2015
Country/Territory	China
City	Nanjing
Period	06/12/15 → 09/12/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

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10.1109/APMC.2015.7413349

Cite this

Chang, C. C., Wang, Y. C., Lin, Y. C., & Chin, K. S. (2015). Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures. In F. Meng, W. Hong, G.-Q. Yang, Z. Song, & X.-W. Zhu (Eds.), 2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015 Article 7413349 (Asia-Pacific Microwave Conference Proceedings, APMC; Vol. 3). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APMC.2015.7413349

Chang, Chih Chun ; Wang, Yu Chung ; Lin, Yi Chen et al. / Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures. 2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015. editor / Fan Meng ; Wei Hong ; Guang-Qi Yang ; Zhe Song ; Xiao-Wei Zhu. Institute of Electrical and Electronics Engineers Inc., 2015. (Asia-Pacific Microwave Conference Proceedings, APMC).

@inproceedings{c067a14ce9d843ae95b8f4ab7d59fd49,

title = "Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures",

abstract = "This paper presents a dual-band quadrature coupler with a cascaded coupled-line structure. Conventionally, the parallel coupled lines with an electrical length of 90° only operate at a single frequency. The proposed design achieves dual-band operation by cascading three coupled-line sections with appropriate electrical lengths, which has the advantage of high frequency ratio. The design strategy was validated by designing an experimental dual-band quadrature coupler. The measured results show excellent dual-band performance of-10.6 and-10.8 dB coupling level at 0.84 and 5.17 GHz with bandwidths of 47.6% and 9.1%, respectively. The measured return loss and isolation were better than-18 and-22 dB, respectively, and a phase difference of 90.5° and-88.5° at the dual center frequencies between the two output ports.",

author = "Chang, {Chih Chun} and Wang, {Yu Chung} and Lin, {Yi Chen} and Chin, {Kuo Sheng}",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 2015 Asia-Pacific Microwave Conference, APMC 2015 ; Conference date: 06-12-2015 Through 09-12-2015",

year = "2015",

doi = "10.1109/APMC.2015.7413349",

language = "英语",

series = "Asia-Pacific Microwave Conference Proceedings, APMC",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

editor = "Fan Meng and Wei Hong and Guang-Qi Yang and Zhe Song and Xiao-Wei Zhu",

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Chang, CC, Wang, YC, Lin, YC & Chin, KS 2015, Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures. in F Meng, W Hong, G-Q Yang, Z Song & X-W Zhu (eds), 2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015., 7413349, Asia-Pacific Microwave Conference Proceedings, APMC, vol. 3, Institute of Electrical and Electronics Engineers Inc., 2015 Asia-Pacific Microwave Conference, APMC 2015, Nanjing, China, 06/12/15. https://doi.org/10.1109/APMC.2015.7413349

Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures. / Chang, Chih Chun; Wang, Yu Chung; Lin, Yi Chen et al.
2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015. ed. / Fan Meng; Wei Hong; Guang-Qi Yang; Zhe Song; Xiao-Wei Zhu. Institute of Electrical and Electronics Engineers Inc., 2015. 7413349 (Asia-Pacific Microwave Conference Proceedings, APMC; Vol. 3).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures

AU - Chang, Chih Chun

AU - Wang, Yu Chung

AU - Lin, Yi Chen

AU - Chin, Kuo Sheng

PY - 2015

Y1 - 2015

N2 - This paper presents a dual-band quadrature coupler with a cascaded coupled-line structure. Conventionally, the parallel coupled lines with an electrical length of 90° only operate at a single frequency. The proposed design achieves dual-band operation by cascading three coupled-line sections with appropriate electrical lengths, which has the advantage of high frequency ratio. The design strategy was validated by designing an experimental dual-band quadrature coupler. The measured results show excellent dual-band performance of-10.6 and-10.8 dB coupling level at 0.84 and 5.17 GHz with bandwidths of 47.6% and 9.1%, respectively. The measured return loss and isolation were better than-18 and-22 dB, respectively, and a phase difference of 90.5° and-88.5° at the dual center frequencies between the two output ports.

AB - This paper presents a dual-band quadrature coupler with a cascaded coupled-line structure. Conventionally, the parallel coupled lines with an electrical length of 90° only operate at a single frequency. The proposed design achieves dual-band operation by cascading three coupled-line sections with appropriate electrical lengths, which has the advantage of high frequency ratio. The design strategy was validated by designing an experimental dual-band quadrature coupler. The measured results show excellent dual-band performance of-10.6 and-10.8 dB coupling level at 0.84 and 5.17 GHz with bandwidths of 47.6% and 9.1%, respectively. The measured return loss and isolation were better than-18 and-22 dB, respectively, and a phase difference of 90.5° and-88.5° at the dual center frequencies between the two output ports.

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BT - 2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015

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A2 - Hong, Wei

A2 - Yang, Guang-Qi

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PB - Institute of Electrical and Electronics Engineers Inc.

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Chang CC, Wang YC, Lin YC, Chin KS. Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures. In Meng F, Hong W, Yang GQ, Song Z, Zhu XW, editors, 2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015. Institute of Electrical and Electronics Engineers Inc. 2015. 7413349. (Asia-Pacific Microwave Conference Proceedings, APMC). doi: 10.1109/APMC.2015.7413349

Dual-band quadrature coupler with high frequency ratio using cascaded coupled-line structures

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