Numerical calculation of extremely large reflector antenna using high-performance parallel MLFMA

Author

Xu-Min Sun ; Bin Li ; Xiao-Min Pan ; Xin-Qing Sheng

Author_Institution

Center for Electromagn. Simulation, Beijing Inst. of Technol., Beijing, China

fYear

2013

fDate

1-3 Aug. 2013

Firstpage

46

Lastpage

48

Abstract

The extremely large parabolic reflector of the 500-m aperture spherical telescope (FAST) is calculated. As the largest single dish in the world, the FAST reflector is a spherical cap with a radius of 300 m and an aperture diameter of 500 m. In order to accurately calculate the FAST antenna model, the parallel multilevel fast multipole algorithm (MLFMA) is used, in combination with the improved sparse approximate inverse (SAI) preconditioner algorithm. Fast far-field calculation method based on upward pass of the MLFMA is used to accelerate the code efficiency. Result shows the efficiency for antenna gain is improved several thousand times. To verify the calculation, simulations using commercial software ANSYS FEKO were carried out, and good agreement between calculation and simulation is obtained.

Keywords

reflector antennas; telescopes; FAST antenna; FAST reflector; SAI preconditioner; aperture spherical telescope; commercial software ANSYS FEKO; extremely large parabolic reflector; extremely large reflector antenna; high-performance parallel MLFMA; multilevel fast multipole algorithm; size 500 m; sparse approximate inverse preconditioner; Abstracts; Apertures; Equations; Feeds; MATLAB; Mathematical model; Numerical models;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics (iWEM), 2013 IEEE International Workshop on

Conference_Location

Kowloon

Print_ISBN

978-1-4799-6654-7

Type

conf

DOI

10.1109/iWEM.2013.6888766

Filename

6888766