Dynamic switch matrix for the TDMA satellite switching system
Abstract
Future high capacity satellite communication systems require signal processing on board satellites. The on-board signal processing includes switching of RF signals between multiple antennas to provide interconnection between the uplink and downlink beams. This paper describes the development of a dynamic switch matrix for a TDMA satellite switching system to be used in the next generation communications satellites. In this paper, a dynamic switch matrix, which includes the microwave switch matrix, the distribution control unit and the timing source, will be described. Several different microwave switch matrix architectures and switching devices were evaluated and compared. A unique coupler crossbar switch matrix architecture with dual-gate field effect transistor as switching element was developed. Experimental results of both microwave switch matrix (MSM) and distribution control unit (DCU) are presented. These test results verify the MSM with coupler crossbar architecture and dual-gate FET as switching element will meet the future SS-TDMA system requirements. Finally, the reliability of the dynamic switch matrix is addressed. The analysis shows reliability of 0.9981 for 7 year space operation can be achieved for the designed dynamic switch matrix.
- Publication:
-
9th Communications Satellite Systems Conference
- Pub Date:
- 1982
- Bibcode:
- 1982coss.conf..135H
- Keywords:
-
- Communication Satellites;
- Matrices (Circuits);
- Microwave Circuits;
- Onboard Data Processing;
- Switching Circuits;
- Time Division Multiple Access;
- Circuit Diagrams;
- Control Equipment;
- Field Effect Transistors;
- Network Analysis;
- Satellite Communication;
- Signal Processing;
- Electronics and Electrical Engineering