28-GHz varactor continuous phase modulator
Abstract
This paper describes the design and measured performance of the 28-GHz varactor continuous phase modulator/driver system which has been developed for an experimental satellite-borne Beacon transmitter. The first upper and lower sidebands are 7 dB down from the output carrier spectral level when the modulator is operating with a single modulating frequency of either 530 or 265 MHz. The modulator system has good long-term output spectral amplitude level stability, typically plus or minus 0.25 dB over an operating ambient temperature range between -15 C and +45 C.
- Publication:
-
COMSAT Technical Review
- Pub Date:
- November 1975
- Bibcode:
- 1975COMTR...5..329L
- Keywords:
-
- Beacon Satellites;
- Phase Modulation;
- Satellite-Borne Radar;
- Varactor Diodes;
- Amplitude Modulation;
- Frequency Modulation;
- Junction Diodes;
- Linear Circuits;
- Magnetic Domains;
- Modulated Continuous Radiation;
- Spectrum Analysis;
- Electronics and Electrical Engineering