期刊
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
卷 50, 期 6, 页码 1712-1714出版社
WILEY
DOI: 10.1002/mop.23460
关键词
branch-line coupler; four coupled transmission-lines
A compact branch line coupler (BLC) using four coupled transmission lines is introduced. The loaded part of the proposed model has a same performance with a cascade two unit elements and it is equaled by a quarter wavelength line. The quarter wavelength lines of each branch in the conventional coupler are replaced by an equivalent circuit composed of a four coupled transmission line and two transmission lines. A compact branch-line coupler (BLC) is designed, analyzed, and tested using this technique. The Size reduction is about 65% with comparable performance. The measurement results are in good agreement with the theoretical ones. (C) 2008 Wiley Periodicals, Inc.
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