NDLI: A Dual Circularly Polarized Waveguide Antenna With Bidirectional Radiations of the Same Sense

Content Provider	IEEE Xplore Digital Library
Author	Yang Zhao Zhijun Zhang Kunpeng Wei Zhenghe Feng
Copyright Year	1963
Abstract	A dual circularly polarized waveguide antenna with bidirectional radiations of the same sense is proposed in this communication. Bidirectional circular polarization (Bi-CP) of the same sense was obtained by two identical rectangular metal slices installed on one lateral side of the waveguide with an intersection angle of 45^°. These two metal slices were horizontally perpendicular to each other and vertically spaced by a quarter guided wavelength. A rat-race coupler was employed to excite the two metal slices with the same amplitude, but with a 0^° or 180^° phase difference depending on the selection of two inputs. One sense of Bi-CP was realized when the two metal slices were fed in phase and the opposite sense of Bi-CP could be obtained when they were fed out of phase. A prototype for 2.4-GHz WLAN application was tested to verify our design. The measured common bandwidth for 10-dB return loss and 3-dB axial ratio at the two feed ports was 230 MHz (9.6%, 2.29-2.52 GHz) and 210 MHz (8.6%, 2.35-2.56 GHz), respectively. The measured isolation between the two feed ports was better than 30 dB over the whole operating band.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	480
Ending Page	484
Page Count	5
File Size	1378697
File Format	PDF
ISSN	0018926X
Volume Number	62
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antenna measurements Metals Microstrip antennas Bandwidth Couplers same sense Bidirectional circular polarization dual sense
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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