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Journal of Electromagnetic Waves and Applications Volume 27, 2013 - Issue 12
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Articles

Calculation of physical optics integrals over electrically large NURBS surface illuminated by a Gaussian beam for reflector antenna applications

Chuan Wu Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China , Chengdu, 611731, P.R. China
,
Feng Yang Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China , Chengdu, 611731, P.R. China
,
Jun Ouyang Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China , Chengdu, 611731, P.R. China
,
Peng Yang Department of Microwave Engineering, School of Electronic Engineering, University of Electronic Science and Technology of China , Chengdu, 611731, P.R. China
&
Haijing Zhou Institute of Applied Physical and Computational Mathematics , Beijing 100094, P.R. China
Pages 1496-1508 | Received 26 Mar 2013, Accepted 18 Jun 2013, Published online: 16 Jul 2013
 
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Abstract

For reflector antenna applications, a method for calculation of physical optics (PO) integrals over electrically large nonuniform rational B-spline surfaces illuminated by a Gaussian Beam is presented in this paper. This method has efficient advantages and its computation cost does not increase with frequency. The highly oscillatory PO integral is calculated with delaminating quadrature method. The influence of critical points is taken into account by subdividing the integral intervals. Numerical examples are presented to validate this approach.

Acknowledgments

This work was supported by the Natural Science Foundation of China (No. 11176007 and No. 61001029), the Fundamental Research Funds for the Central Universities(No. ZYGX2010X005); the Aeronautical Science Foundation (No. 2011018001), and Sichuan Science and Technology Support Project (No. 2011GZ0157). Key Laboratory of Advanced Integrated Electronic System, Ministry of Education, University of Electronic Science and Technology of China, Chengdu, 611731.

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