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Frequency switchable branch‐line hybrid coupler
Author(s) -
Chongcheawchamnan Mitchai,
Julrat Sakol,
Shafique Mohammad F.,
Pamornak Burawich,
Robertson Ian D.
Publication year - 2013
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.27648
Subject(s) - multi band device , microwave , transmission line , transformer , hybrid coupler , electronic engineering , engineering , frequency band , electric power transmission , line (geometry) , electrical engineering , power dividers and directional couplers , telecommunications , voltage , mathematics , geometry , antenna (radio)
This article first presents a frequency‐selectable branch‐line hybrid coupler.To provide a frequency‐selection function, a dual‐band band‐pass transmission‐line transformer (TLT) with a frequency selective function is used. This is achieved by replacing a dual‐band TLT with a variable capacitively loaded spur‐line filter. The technique is demonstrated with a design at 0.8 and 1.75 GHz. Measured S‐parameter results confirm the validity of the technique. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1661–1663, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27648