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Yumi Takizawa
Atsushi Fukasawa

Author(s) and WSEAS

Yumi Takizawa
Atsushi Fukasawa

WSEAS Transactions on Communications

Print ISSN: 1109-2742
E-ISSN: 2224-2864

Volume 16, 2017

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

Novel Structure and the Characteristics of a Microwave Circular Polarization Antenna

AUTHORS: Yumi Takizawa, Atsushi Fukasawa

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ABSTRACT: This paper gives a novel structure of circular polarization antenna at the X-band. This antenna is made as plane antenna composed of a feed- and a reactance-elements on a wide ground plate. The feed element is made by a circular disc cut linearly at the both sides along x-axis. The resonant frequencies are fH and fL along x- and y- axes respectively. Degeneration is achieved by shifting the resonant frequencies to be fH > fL which correspond to resonant lengths along x- and y- axes. By defining the position of the feeding point, π/2 phase difference is provided for circular polarization with the current iL and iH. The reactance element is made of a circular disk smaller than the feed element. This element expands the bandwidth fH - fL of resonances, which brings expansion of effective band width of circular polarization. A circular polarization plane antenna with 0.7 GHz bandwidth was realized at 10GHz without spurious radiation between 5 ~ 15GHz.

KEYWORDS: Circular polarization, Plane antenna, Degeneration of resonances, spurious frequencies, Axial ratio, X-band antenna


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WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 16, 2017, Art. #22, pp. 184-191

Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0

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