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A novel compact branch‐line coupler using four coupled transmission lines
Author(s) -
Nosrati Mehdi,
Karbasi Valashani Salman
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23460
Subject(s) - electric power transmission , microwave , cascade , hybrid coupler , transmission line , line (geometry) , microwave transmission , electrical engineering , wavelength , optics , engineering , electronic engineering , physics , power dividers and directional couplers , telecommunications , mathematics , geometry , chemical engineering
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. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1712–1714, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23460
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