Fast and Accurate Analysis of Reflector Antennas With Phased Array Feeds Including Multiple Reflections Between Feed and Reflector

被引：11

作者：

Iupikov, Oleg A. ^{[1
]}

Maaskant, Rob ^{[1
]}

Ivashina, Marianna V. ^{[1
]}

Young, Andre ^{[2
]}

Kildal, Per-Simon ^{[1
]}

机构：

[1] Chalmers Univ Technol, Signals & Syst Dept, S-41258 Gothenburg, Sweden

[2] Univ Stellenbosch, Elect & Elect Engn Dept, ZA-7602 Stellenbosch, South Africa

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2014年 / 62卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

Characteristic basis function method; method of moments (MoM); phased array feeds (PFAs); physical optics (POs); radio astronomy; FIELD; SCATTERING; EFFICIENCY;

D O I：

10.1109/TAP.2014.2320529

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Several electrically large phased array feed (PAF) reflector systems are modeled to examine the mechanism of multiple reflections between parabolic reflectors and low-and high-scattering feeds giving rise to frequency-dependent patterns and impedance ripples. The PAF current is expanded in physics-based macro domain basis functions (CBFs), while the reflector employs the physical optics (POs) equivalent current. The reflector-feed coupling is systematically accounted for through a multiscattering Jacobi approach. An FFT expands the reflector radiated field in only a few plane waves, and the reflector PO current is computed rapidly through a near-field interpolation technique. The FEKO software is used for several cross validations, and the convergence properties of the hybrid method are studied for several representative examples showing excellent numerical performance. The measured and simulated results for a 121-element Vivaldi PAF, which is installed on the Westerbork Synthesis Radio Telescope, are in very good agreement.

引用

页码：3450 / 3462

页数：13

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