Multiscale analysis of panel gaps in the Haystack parabolic reflector

Author

Farahat, Nader ; Mittra, Raj

Author_Institution

Puerto Rico Polytech Univ., Puerto Rico

fYear

2005

fDate

3-7 April 2005

Firstpage

557

Lastpage

560

Abstract

The effect of the gaps between the panels of a reflector, used as a radio-telescope, is analyzed in this paper via the multiscale and array factor approach. Initially, the simulation is carried out by numerical integration as well as the finite difference time domain (FDTD) method for a reflector with a moderately large diameter, and the results are then scaled for the actual size, which is thousands of wavelengths in diameter in the frequency range of interest. The array factor concept is employed to demonstrate the fact that the grating lobe cannot arise for the typical gap size of the reflector.

Keywords

antenna arrays; antenna radiation patterns; finite difference time-domain analysis; integration; radiotelescopes; reflector antennas; FDTD method; Haystack parabolic reflector; array factor approach; array factor concept; finite difference time domain; grating lobe; multiscale analysis; numerical integration; panel gaps; radio-telescope; Apertures; Diffraction; Finite difference methods; Frequency; Gratings; Reflector antennas; Shadow mapping; Solids; Strips; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Applied Computational Electromagnetics, 2005. IEEE/ACES International Conference on

Print_ISBN

0-7803-9068-7

Type

conf

DOI

10.1109/WCACEM.2005.1469648

Filename

1469648