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Studying the nonlinear performance of an amplifying reflectarray antenna

Published online by Cambridge University Press:  08 January 2016

Iman Aryanian ,
Abdolali Abdipour  and
Gholamreza Moradi
Iman Aryanian
Affiliation:
Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15914, Iran
Abdolali Abdipour
Affiliation:
Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15914, Iran
Gholamreza Moradi*
Affiliation:
Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15914, Iran
*
Corresponding author: G. Moradi Email: ghmoradi@aut.ac.ir
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Abstract

In this paper, significance of studying the nonlinear performance of amplifying reflectarray antenna is clarified by showing nonlinear behavior of the unit cell. Furthermore, the procedure for nonlinear analysis of amplifying reflectarray antenna is described and nonlinear analysis is verified by ADS software simulation. Moreover, a typical amplifying reflectarray antenna is designed considering the nonlinear behavior. Nonlinear analysis of the active aperture-coupled patch unit cell is performed using harmonic balance method considering nonlinear model of the amplifier. Then, the effect of nonlinear element in radiation pattern of the antenna is studied. Passive unit cell is simulated using full-wave analysis method considering infinite array approach, and scattering parameters of the unit cell is obtained. Next, these scattering parameters are transformed to admittance parameters and used in obtaining nonlinear response and harmonic distortion of the unit cell containing amplifier. Obtained results show up to 3.4 dB error in predicting pattern of the antenna with linear modeling of the active element.

Keywords

Active array antennas and componentsAntenna designModeling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 3 , April 2017 , pp. 481 - 491
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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