By Topic

A Radial Line Slot Antenna for an Elliptical Beam

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Tung Nguyen ; Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, Japan ; Hideki Ueda ; Jiro Hirokawa ; Makoto Ando

A radial line slot antenna (RLSA) with a quasi-elliptical aperture to create an elliptical beam is discussed in this paper. A simple feeding structure consisting of a coaxial feeder and two parasitic pins is designed to produce the feed pattern required for uniform illumination over the aperture. The slot length distribution in the radial direction is designed to be similar to conventional RLSAs for specified radial dimensions associated with the elliptical aperture. A 22 GHz quasi-elliptical RLSA with major and minor axes of 300 mm and 150 mm, respectively, was designed. The radiation pattern predicted by a method of moments (MoM) had 3 dB beam-widths of 2.46 and 4.9 degrees in the 0- and 90-degree cut-planes, and the directivity of 33 dBi corresponds to an aperture efficiency of 71.5%. The measured 3 dB beam-widths and the directivity agree well with the predictions. The measured antenna gain of 31.8 dB at 22.0 GHz corresponds to an antenna efficiency of 56%, while the axial ratio is 1.74 dB.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:60 ,  Issue: 12 )