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

Oleg Iupikov (Institutionen för signaler och system, Antenner) ; Rob Maaskant (Institutionen för signaler och system, Antenner) ; Marianna Ivashina (Institutionen för signaler och system, Antenner) ; A. Young ; Per-Simon Kildal (Institutionen för signaler och system, Antenner)
IEEE Transactions on Antennas and Propagation (0018-926X). Vol. 62 (2014), 7, p. 3450 - 3462.
[Artikel, refereegranskad vetenskaplig]

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.

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Denna post skapades 2014-09-24. Senast ändrad 2017-06-28.
CPL Pubid: 203202


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Institutioner (Chalmers)

Institutionen för signaler och system, Antenner (2005-2014)


Informations- och kommunikationsteknik
Elektroteknik och elektronik

Chalmers infrastruktur

Onsala rymdobservatorium

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