Solid State Microwave Surveillance Radiosonde Sources.
Abstract
The report covers the work performed during Phase II of a two-task program in the field of efficient, all solid state, low cost microwave sources. Some material reported on during the first half of the program was included here to provide continuity of the presentation. Task I Four final hybrid integrated prototype transmitters were constructed and delivered. The oscillator circuits were fabricated on 0.050 in. thick, high alumina substrates using photolithographic and etching techniques. The modulator circuits were realized using thick-film hybrid integrated technology. One transmitter was adjusted to give the required 250 mW power output that resulted in a pulling figure of 5.5 MHz. The remaining three transmitters were adjusted for a power output in the range from 100 mW to 130 mW which reduced the pulling figure to values between 1.7 MHz to 3 MHz. All transmitters were temperature compensated using a bimetallic tuning strip that kept the frequency variation over the -70C to +75C temperature range below 1 to 1.4 MHz. The transmitters were mechanically tunable from 1660 MHz to 1700 MHz. Task II Epitaxial material having a breakdown voltage of approximately 80 volts was grown. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1968
- Accession Number
- AD0845171
Entities
People
- A. Presser
- E. F. Belohoubek
- J. R. Collard