Fast and Accurate Analysis of Reflector Antennas with Phased Array Feeds Including Multiple Reflections between Feed and Reflector
Journal article, 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.

Author

Oleg Iupikov

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Rob Maaskant

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Marianna Ivashina

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

A. Young

Stellenbosch University

Per-Simon Kildal

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

IEEE Transactions on Antennas and Propagation

0018926x (ISSN) 15582221 (eISSN)

Vol. 62 7 3450 - 3462 6807787

Areas of Advance

Information and Communication Technology

Infrastructure

Onsala Space Observatory

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TAP.2014.2320529

More information

Created

10/8/2017