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A tunable dual-band branch line coupler based on composite right/left-handed transmission lines

✍ Scribed by Jinsung Park; Yongshik Lee

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
765 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article demonstrates a frequency‐tunable dual‐band branch line coupler based on composite right/left‐handed transmission lines.A simple, yet effective conversion enables to design such transmission lines in a form that can be frequency tuned. A tuning function is realized with varactors. For demonstration, a dual‐band branch line coupler at 0.6 and 1.2 GHz is fabricated. Tuning ranges of 51.4 and 18.0% are measured in the lower and upper band, respectively, in which |S~21~/S~31~| ≤ ±0.5 dB is obtained, when maintaining S~11~ below −10 dB. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1955–1958, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25373

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