Abstract
A new method, with branches having an equivalent series inductance using defected ground structure, is proposed for size reduction and harmonic suppression of branch-line coupler. The proposed structure is 35% of the conventional branch-line coupler at 1 GHz and the measured third harmonic signal is less than −30 dB. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1966–1969, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21830
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