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Uniplanar harmonic suppressed compact rat-race couplers

✍ Scribed by Vamsi Krishna Velidi; Mrinal Kanti Mandal; Amitabha Bhattacharya

Book ID
102518915
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
414 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A design of a miniaturized rat‐race coupler with higher‐order harmonic suppression is presented in this article. The slow wave effect and stopband produced by a shunt open‐stub is utilized to miniaturize the occupying area and suppress higher order harmonics, respectively. Design guidelines are obtained using a transmission line model. A prototype coupler has been fabricated in microstrip line to validate the theoretical predictions. The fabricated coupler occupies 18.4% area of that of a conventional coupler. At the same time, the second to tenth harmonics are suppressed by at least 15 dB. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2812–2814, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23840

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