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A New Wide-Band and Reduced-Size Hybrid Ring
Tadashi KAWAI Isao OHTA
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/02/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Circuit and Device Technology for High-Speed Wireless Communication)
Category: Passive (Coupler)
hybrid ring, equivalent admittance, uniplanar circuit, phase inverter, broadband,
Full Text: PDF(300.4KB)>>
This paper presents a miniaturized reverse-phase hybrid ring by the use of shunt capacitors, and successfully designs a very miniature hybrid ring of a 0.28-wavelength circumference with a wide bandwidth comparable to the regular reverse-phase hybrid ring based on the equivalent admittance approach. Moreover, a method of broadening the bandwidth with adding a matching network consisting of a very short transmission line and two shunt capacitors at each port is also described. The validity of the proposed design is demonstrated by electromagnetic simulator (Sonnet em) for a uniplanar hybrid ring.