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Methods to excite circularly polarized waves for a quad‐unit
Author(s) -
Chang The Nan
Publication year - 2007
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.22749
Subject(s) - microwave , offset (computer science) , optics , unit (ring theory) , physics , ring (chemistry) , circular polarization , engineering , telecommunications , microstrip , computer science , mathematics , chemistry , mathematics education , organic chemistry , programming language
In this article, techniques to generate circularly polarized waves for a quad‐unit are investigated. The quad‐unit is offset‐fed by an open rectangular ring. It has been shown that both 3‐dB axial ratio and 10‐dB return loss bandwidths can be achieved up to 11%. With a large ring, we have a stable maximum beam at the bore‐sight direction. In experiments, it can provide a gain of 7 dBic at 5.5 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2372–2375, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22749