Title :
High-resolution adaptive nulling performance for a lightweight agile EHF multiple beam antenna
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
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° of the user. Cancellation greater than 30 dB when operating in a wide-band mode is experimentally demonstrated
Keywords :
adaptive antenna arrays; antenna testing; interference suppression; jamming; millimetre wave antenna arrays; multibeam antennas; satellite antennas; 43.5 to 45.5 GHz; EHF multiple beam antenna; anechoic chamber measurements; beam positions; communications system; design; fabrication; ferrite switches; four-channel RF ing network; high-resolution adaptive ing performance; jammer; lightweight agile EHF multiple beam antenna; lightweight feed horns; measured performance; pattern discrimination; satellite antenna; 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;
Conference_Titel :
Microwave Systems Conference, 1995. Conference Proceedings., IEEE NTC '95
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-2591-1
DOI :
10.1109/NTCMWS.1995.522885
