Title :
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
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;
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
DOI :
10.1109/MILCOM.1991.258342
