A STUDY OF ELECTRONICALLY TUNABLE MICROWAVE (X-BAND) GENERATORS.
Abstract
The feasibility of the circuit techniques developed so far have been demonstrated in a model which delivers 250 mW at X-band. The entire unit, utilizing a 1.2 W driver is tunable over a two percent band. This power source, consisting of a driver followed by two solid-state multipliers, occupies a volume of approximately eight cubic inches. Work is in progress to enhance this output power level by using a higher-power solid-state driver. A mechanically-tuned version of the solid-state driver, a transistor-oscillator-tripler, is virtually complete. Using a single transistor, 2.5 W have been generated at 1.25 GHz, with an over-all DC to RF efficiency of 35%. Using a 2-1/2 inch by 1-1/4 in. by 1-1/4 inch package, a mechanical tuning range of greater than 4 % has been achieved. This unit will be used to drive the complete solid-state chain. Diodes which have a hyper-abrupt characteristic over a limited voltage region have been obtained. The measured characteristic of thse diodes agrees with what is predicted from the doping porfile by the theoretical study given in the Second Quarterly Report. These diodes are currently being tested in high-order multiplier circuits. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0486956
Entities
People
- B. B. Bossard
- E. W. Markard
- P. S. Torrione
- R. L. Ernst