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An analytical simplified model to characterize focused aperture antennas

Published online by Cambridge University Press:  05 September 2014

Antonio García-Pino
Antonio García-Pino*
Affiliation:
AtlantTIC (Atlantic Research Center for Information and Communication Tecnologies), E.E. Telecomunicación, University of Vigo, 36310 Vigo, Spain. Phone: +34 986 812123
*
Corresponding author: A. García-Pino Email: agpino@com.uvigo.es
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Abstract

This paper presents an analytical model to characterize the radiation pattern of focused aperture antennas. The model is based on the classic parabolic on pedestal distribution for amplitude, but in this work the focusing phase term is considered and applied in the Fresnel region. The model is useful for millimeter and submillimeter wave imaging radar systems that usually work in the Fresnel region of the antenna. Analytical closed expressions are developed to predict the available resolution (transversal beamwidth) and operating range (axial beamwidth) of such systems. The effects of the first- and second-order phase distributions on the aperture have also been also studied in order to show the scanning effect, the axial refocusing, and the astigmatic beam degradation.

Keywords

Antenna designModeling and measurementsAntennas and propagation for wireless systems
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 1 , February 2016 , pp. 41 - 49
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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