GUNN EFFECT DEVICES
Abstract
During the last quarterly period, time has been spent on organizing material requirements and setting up microwave and pulse bias circuitry along with producing initial runs of 'scaled-up' CW units for use as pulse devices. Initial testing has shown efficiencies as high as 8% but more normally around 5 to 6 1/2%. Power levels were below 1 1/4 watts due to improper device fabrication but are expected to improve appreciably in future runs. Thermal and geometrical considerations have been given to single and multiple unit sandwich type devices. Multiple chip unit problems were considered and various modes of operation have been studied for more efficient operation. LSA operating range has been considered to be too confined for low frequency operation in general. Hybrid mode and resonant transit time modes seem to hold more promise for achieving required pulse performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1968
- Accession Number
- AD0841056
Entities
People
- J. Abrrera