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19 August 1994 Branch-line hybrid-rings with coupled lines for miniaturization
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Proceedings Volume 2211, Millimeter and Submillimeter Waves; (1994)
Event: Millimeter and Submillimeter Waves and Applications: International Conference, 1994, San Diego, CA, United States
A branch-line hybrid-ring is composed of four quarter-wavelength transmission lines, and hence occupies a large area on printed circuit boards because of its loop structure. For this reason, reduced-size hybrid rings using multilayer meander-like transmission lines or lumped capacitors have been proposed. In this paper, a branch-line hybrid-ring which includes microwave C-type sections (C-section) is proposed for size reduction. The perfect input match and isolation can be attained at a center frequency as in a normal hybrid-ring. No practical differences are found in the frequency characteristics between the normal network and the proposed one.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Iwata Sakagami, Takatugu Munehiro, and Hiroyuki Tanaka "Branch-line hybrid-rings with coupled lines for miniaturization", Proc. SPIE 2211, Millimeter and Submillimeter Waves, (19 August 1994);

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