IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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Circularly Polarized Post-wall Waveguide Slotted Arrays
Hisahiro KaiJiro HirokawaMakoto Ando
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2004 Volume 1 Issue 1 Pages 7-12

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Abstract

The circularly polarized post-wall waveguide array is designed and fabricated for the first time. The aperture illumination and the characteristics of the antenna are investigated by using analysis/design method developed for oversized rectangular waveguide slot arrays. The uniformity as well as the polarization is perturbed along the periphery of the aperture; the narrow walls are identified to be the dominant factors for degrading the amplitude uniformity and the polarization purity in the aperture illumination. The peak gain of 29.3dBi with 39.7% efficiency is realized at 77GHz band for the antenna with about 5cm square aperture.

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© 2004 by The Institute of Electronics, Information and Communication Engineers
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