High-efficiency solid-state C-band generator
Abstract
Progress toward the development of a 10 W CW 5 GHz generator having more than 25 percent efficiency and capable of being combined with similar units to produce 50 W output is described. GaAs Read IMPATT diodes were used as active elements. Procedures for the growth and analysis of epitaxial GaAs wafers having doping profiles appropriate for C-band Read diodes were developed. Wafers selected for processing were fabricated into four-mesa PHS diodes. The better units typically achieved 4.5-5 deg. C/W thermal resistance, and had power CW power outputs of 10 W or more with 20-25 percent efficiency in the 5 GHz range. Active current regulators were developed which allowed stable operation of the diodes with good overall system efficiency. A 6-diode TM010-mode cavity-type oscillator was constructed which delivered 60 W CW output near 5.1 GHz with approximately 20 percent efficiency. The major program objectives were achieved or closely approached.
- Publication:
-
Final Technical Report
- Pub Date:
- November 1975
- Bibcode:
- 1975rayc.reptS....W
- Keywords:
-
- C Band;
- Diodes;
- Microwave Oscillators;
- Product Development;
- Additives;
- Crystal Growth;
- Gallium Arsenides;
- Thermal Resistance;
- Wafers;
- Electronics and Electrical Engineering