MICROWAVE DIODE RESEARCH.
Abstract
GaAs varactors for harmonic generator application were fabricated on uniformly doped and on exponentially doped epitaxial layers. Some of these diodes were employed in a 4- to 12-Gc tripler with an input power of 100 mw and a conversion efficiency of 74 per cent. These varactors have cutoff frequencies of over 700 Gc at breakdown voltages of 30 volts. Higher breakdown up to 100 volts with cutoff frequency of 400 to 500 Gc at breakdown have also been obtained. An experimental technique is described which makes possible the measurement of PIN diode-switching control voltage and current transients of less than 1 ns duration and the measurement of transient microwave impedance during switchin times as short as 10 ns. The technique emplys a sampling oscilloscope for the voltage and current transient measurements and an additional rf signal generator for the microwave impedance measurements. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 1964
- Accession Number
- AD0447552
Entities
People
- J. C. Irvin
- R. L. Johnston