Verification of THEA Tile Calibration and Beamforming Results using a Near Field Scanner

Author

Hampson, G.A. ; De Vaate, J. G Bij

Author_Institution

ASTRON Technical Laboratory, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands, Phone: +31 (0) 521 595 283, Fax: +31 (0) 521 597 332, E-mail: hampson@astron.nl

fYear

2001

fDate

24-26 Sept. 2001

Firstpage

1

Lastpage

4

Abstract

ASTRON is in the process of realizing phased array technology for the Square Kilometer Array (SKA). A demonstrator known as the THousand Element Array (THEA) is currently under construction to develop such technology. One of the 16 phased array tiles from which THEA is built, is reported in this paper. Each tile can be calibrated using a Phase Toggling Technique developed previously. The only verification of such a processes were possible by measuring beam patterns. This paper illustrates the use of a recently installed Planar Near Field Scanner to perform the verification using holography measurements. Additionally the scanner provides far field beam patterns, which are also presented. An important part of SKA technology is the ability to reject RFI signals, which is demonstrated using deterministic nulling techniques. These results are also illustrated.

Keywords

Antenna arrays; Array signal processing; Calibration; Extraterrestrial measurements; Holography; Interference; Phased arrays; Radio frequency; Structural beams; Tiles; Calibration; Near Field Scanners; Phase Toggling; Phased Arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. 31st European

Conference_Location

London, England

Type

conf

DOI

10.1109/EUMA.2001.339050

Filename

4140118