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

Author

Fenn, A.J. ; Johnson, J.R. ; Rispin, L.W. ; Cummings, W.C. ; Potts, B.M.

Author_Institution

MIT Lincoln Lab., Lexington, MA, USA

fYear

1991

fDate

4-7 Nov 1991

Firstpage

678

Abstract

The design and experimental performance of a lightweight high-resolution adaptive nulling extremely high-frequency 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 were used to adaptively null a jammer in anechoic chamber measurements. Lightweight waveguide transmission lines together with ferrite switches were used to select beam ports from the 127-beam MBA. The MBA was designed to provide simultaneous coverage for three communications system users while providing pattern discrimination or nulling of jammers located within 0.1° of the user. Cancellation greater than 30 dB when operating in a wideband mode was experimentally demonstrated

Keywords

antenna phased arrays; interference suppression; jamming; microwave antenna arrays; satellite antennas; 43.5 to 45.5 GHz; EHF; anechoic chamber measurements; beam ports; extremely high-frequency multiple beam antenna; ferrite switches; four-channel RF ing; high-resolution adaptive ing; jammer; pattern discrimination; satellite antennas; simultaneous coverage; waveguide transmission lines; Anechoic chambers; Antenna measurements; Communication switching; Directional antennas; Ferrites; Jamming; Radio frequency; Switches; Transmission line measurements; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1991. MILCOM '91, Conference Record, Military Communications in a Changing World., IEEE

Conference_Location

McLean, VA

Print_ISBN

0-87942-691-8

Type

conf

DOI

10.1109/MILCOM.1991.258342

Filename

258342