Frequency switchable branch‐line hybrid coupler
Copyright policy ) Mitchai Chongcheawchamnan; Sakol Julrat; Mohammad F. Shafique; Burawich Pamornak; Ian D. Robertson;
Frequency switchable branch‐line hybrid coupler
AbstractThis 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
- University of Leeds United Kingdom
- Prince of Songkla University Thailand
- COMSATS University Islamabad Pakistan
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