17 GHz command receiver for direct broadcast satellites
Abstract
This article describes a 17 GHz dual command receiver assembly for the first U.S. direct broadcast satellite (DBS). The receiver assembly is part of the telemetry, tracking, and command section of the satellite, and it consists of two redundant double-conversion receivers featuring low noise GaAs FET preamplifiers and threshold extension PLL FM demodulators to extract signals out of the noise. Each receiver has a predetection bandwidth of 1.5 MHz, a command sensitivity of -135 dBw and a 10 dB maximum noise figure when operated between -10 and +55 deg C. Measured performance data on the receiver is presented.
- Publication:
-
Microwave Journal
- Pub Date:
- October 1986
- Bibcode:
- 1986MiJo...29...99B
- Keywords:
-
- Direct Broadcast Satellites;
- Microwave Circuits;
- Receivers;
- Satellite Control;
- Satellite Tracking;
- Telemetry;
- Crystal Oscillators;
- Field Effect Transistors;
- Gallium Arsenides;
- Low Noise;
- Phase Lock Demodulators;
- Preamplifiers;
- Communications and Radar