An X-Band Phased Array Antenna with a Large Elliptical Aperture

Yoshihiko KUWAHARA  Toru ISHITA  Yoshihiko MATSUZAWA  Yasunori KADOWAKI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E76-B    No.10    pp.1249-1257
Publication Date: 1993/10/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Radar Technology)
Category: Radar System
Keyword: 
phased array,  lens array,  aperture efficiency monopulse,  elliptical aperture,  

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Summary: 
Monopulse technique is widely used for tracking radars. For tracking at a low elevation angle, a narrow beam is required in the elevation plane to reduce multipath signals such as gound reflections. In this case, an elliptical aperture is desired. We have developed an antenna with a high tracking accuracy and a high aperture efficiency which is composed of a monopulse feed and an elliptical aperture. In this paper we discuss a design of the feed through lens array with an elliptical aperture and a new monopulse feed. Evaluation test results of a production model proved validity of our design and showed good performance.