Title :
A novel two-element active antenna for varying the direction of microwave radiation by optical illumination
Author :
Ueno, Youhei ; Katsuragi, Motohira ; Yamamoto, Yukio
Author_Institution :
Dept. of Electr. Eng. & Electron., Osaka Sangyo Univ., Japan
Abstract :
This paper proposes a novel two-element active antenna for optical scanning beam in X-band. A MESFET in the element antenna works both as a negative resistance and an optically controllable reactance. Laser illumination to the MESFET in one of the antenna elements causes a shift of its free-running frequency and creates a phase difference between the oscillations of the two antenna elements; therefore, the radiation beam can be scanned. In experimental results, the beam direction has been scanned by 26 degrees optically
Keywords :
S-parameters; Schottky gate field effect transistors; active antenna arrays; microwave photonics; negative resistance circuits; scanning antennas; MESFET; X-band; antenna elements; beam direction; free-running frequency; microwave radiation direction; negative resistance; optical illumination; optical scanning beam; optically controllable reactance; scanned radiation beam; two-element active antenna; Directive antennas; Frequency; Laser beams; Lighting; MESFETs; Microwave antennas; Microwave photonics; Optical control; Optical filters; Phased arrays;
Conference_Titel :
Microwave Photonics, 2000. MWP 2000. International Topical Meeting on
Conference_Location :
Oxford
Print_ISBN :
0-7803-6455-4
DOI :
10.1109/MWP.2000.889795
