High-resolution adaptive nulling performance for a lightweight agile EHF multiple beam antenna

Author

Fenn, A.J.

Author_Institution

Lincoln Lab., MIT, Lexington, MA, USA

fYear

1995

fDate

16-20 May 1995

Firstpage

1217

Abstract

The design, fabrication and measured performance of a lightweight high-resolution adaptive nulling EHF multiple beam antenna (MBA) are addressed. A 127-beam MBA and a four-channel RF nulling network operating over the 43.5 to 45.5 GHz band are used to adaptively null a jammer in anechoic chamber measurements. Lightweight feed horns connected to waveguide transmission lines controlled by ferrite switches are used to select beam positions from the 127-beam MBA. The MBA is designed to provide independent coverage for three communications system users while providing pattern discrimination or nulling of multiple jammers located within 0.1/spl deg/ of the user. Cancellation greater than 30 dB when operating in a wide-band mode is experimentally demonstrated.<>

Keywords

adaptive antenna arrays; anechoic chambers; antenna radiation patterns; jamming; millimetre wave antenna arrays; millimetre wave antennas; millimetre wave measurement; multibeam antennas; satellite antennas; 43.5 to 45.5 GHz; EHF multiple beam antenna; adaptive nulling performance; anechoic chamber measurements; feed horns; ferrite switches; four-channel RF nulling network; lightweight agile antenna; multiple jammers; pattern discrimination; waveguide transmission lines; wide-band mode; Anechoic chambers; Antenna measurements; Communication system control; Directional antennas; Fabrication; Feeds; Jamming; Lighting control; Radio frequency; Transmission line measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1995., IEEE MTT-S International

Conference_Location

Orlando, FL, USA

ISSN

0149-645X

Print_ISBN

0-7803-2581-8

Type

conf

DOI

10.1109/MWSYM.1995.406190

Filename

406190