Control of mode-switching in an active antenna using MESFET

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. >

[1]  Tatsuo Itoh,et al.  Optical Control of Active Integrated Antenna , 1992, 1992 22nd European Microwave Conference.

[2]  A. Paolella,et al.  Optically controlled GaAs MMIC switch using a MESFET as an optical detector , 1990, IEEE International Digest on Microwave Symposium.

[3]  Tatsuo Itoh,et al.  Mode analysis and stabilization of a spatial power combining array with strongly coupled oscillators , 1993 .

[4]  Tatsuo Itoh,et al.  Tunable active bandpass filters using three-terminal MESFET varactors , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[5]  Tatsuo Itoh,et al.  A 16 element quasi-optical FET oscillator power combining array with external injection locking , 1992 .

[7]  Tatsuo Itoh,et al.  Quasi-optical planar arrays with FETs and slots , 1993 .

[8]  J. W. Mink,et al.  Quasi-Optical Power Combining of Solid-State Millimeter-Wave Sources , 1986 .

[9]  A.A.A. de Salles.  Optical Control of GaAs MESFET's , 1983 .

[10]  Tatsuo Itoh,et al.  Two-dimensional quasi-optical power-combining arrays using strongly coupled oscillators , 1994 .

[11]  K. A. Hummer,et al.  Experiments on injection locking of active antenna elements for active phased arrays and spatial power combiners , 1989 .

[12]  Tatsuo Itoh,et al.  Mode switch in a two-element active array , 1993, Proceedings of IEEE Antennas and Propagation Society International Symposium.

[13]  Tatsuo Itoh,et al.  Electromagnetic simulation of mode control of a two element active antenna , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[14]  R. C. Compton,et al.  Quasi-optical power combining using mutually synchronized oscillator arrays , 1991 .

[15]  Robert M. Weikle,et al.  Quasi-optical power-combining arrays , 1990, IEEE International Digest on Microwave Symposium.

[16]  Tatsuo Itoh,et al.  A periodic second harmonic spatial power combining oscillator , 1990 .