Title :
Planar lens amplifier
Author :
Schoenberg, J.S.H. ; Popovic, Z.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
A quasi-optical power combining transmission amplifier with a focal point feed has been developed for increasing the power level available from solid-state devices. The focal point feed improves power coupling efficiency over that of a plane-wave feed. Both the receive and transmit sections of the amplifier are fabricated on a single substrate. A 7-PHEMT, 10 GHz amplifier is presented, demonstrating a 29 dB isolation figure and up to a /spl plusmn/30/spl deg/ scan angle with less than 2.5 dB power variation.<>
Keywords :
active antennas; antenna feeders; antenna radiation patterns; high electron mobility transistors; lens antennas; microstrip antennas; microwave amplifiers; microwave antenna arrays; microwave integrated circuits; 10 GHz; PHEMT SHF amplifier; focal point feed; planar lens amplifier; power coupling efficiency; pseudomorphic HEMT; quasi-optical power combining transmission amplifier; solid-state devices; Couplings; Feeds; Lenses; Power amplifiers; Solid state circuits;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335424
