Fast and Accurate Analysis of Reflector Antennas with Phased Array Feeds Including Multiple Reflections between Feed and Reflector
Artikel i vetenskaplig tidskrift, 2014

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.

Författare

Oleg Iupikov

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Rob Maaskant

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Marianna Ivashina

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

A. Young

Universiteit Stellenbosch

Per-Simon Kildal

Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

IEEE Transactions on Antennas and Propagation

0018-926X (ISSN)

Vol. 62 3450 - 3462 6807787

Styrkeområden

Informations- och kommunikationsteknik

Infrastruktur

Onsala rymdobservatorium

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/TAP.2014.2320529