Multi-Altitude Transponder. Volume 4. Design Considerations and Component Selection Criteria
Abstract
The MAT transponder utilizes a crystal-controlled double-conversion phase locked (correlation) receiver with a subcarrier phase-following loop around the complete transponder, for the purpose of phase stability and the realization of the required transponder sensitivity. Thus high sensitivity is realized in the presence of high modulation index subcarriers. Coherent AGC is employed in the receiver. The transmitter is crystal-controlled and phase- modulated, and employs transistors as active stages throughout, as does the transponder receiver. The data amplifier, which improved the transponder signal- to-noise performance by crystal filters, is a fully micro-electronic design, as is much of the transponder receiver circuitry. Cavity filters are employed to realize a high-quality, low-leakage diplexer. The power supply includes integral voltage regulators and dc-to-dc converters of the pulse width modulation type.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0721633
Entities
People
- M. Gantsweg