Title :
Control of mode-switching in an active antenna using MESFET
Author :
Minegishi, Masahiko ; Lin, Jenshan ; Itoh, Tatsuo ; Kawasaki, Shigeo
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
8/1/1995 12:00:00 AM
Abstract :
New techniques of realizing mode-switching in an active antenna by using a MESFET are presented. Two types of control circuits are discussed. One is the control circuit using the reactance variation of the MESFET and the other is the control circuit using the resistance variation of the MESFET. The design of these two control circuits is discussed and the beam-switching phenomena of the antenna using these control circuits are compared. Important characteristics such as antenna patterns, operating frequencies and the insertion loss of the control circuits are also compared and discussed
Keywords :
MESFET circuits; active antennas; antenna radiation patterns; losses; microstrip antennas; microwave integrated circuits; switching; MESFET circuit; MIC; active antenna; antenna patterns; beam-switching phenomena; control circuits; insertion loss; mode-switching control; operating frequencies; reactance variation; resistance variation; Antenna arrays; Antenna radiation patterns; Antenna theory; Capacitance; Communication system control; Coupling circuits; MESFET circuits; Microstrip antenna arrays; Microwave antennas; Optical control;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
