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- Title
Flexible Solid State Power Amplifiers for Space use.
- Authors
Doshi, R. J.; Singh, D. K.; Das, D. K.; Ghodgaonkar, Deepak
- Abstract
This work presents a simplified design of a Solid State Power Amplifier (SSPA) with varying RF output power (flexible SSPA) and its' new type of application for onboard application. For satellite applications, the uplink rain fading losses can be compensated with the help of the Automatic Level Control (ALC) technique by increasing the gain of the amplifier but the for downlink rain fading losses the output power of the power amplifier has to be increased. This can be achieved by the use of flexible SSPA to compensate the downlink rain fade losses. For satellite applications it is necessary to maximize power added efficiency in all operating conditions for reliable and cost effective operation. This is achieved by DC bias control of the power stages of the power amplifier to improve the overall power added efficiency. A remarkable improvement of the order of 5 % at 3 dB back off is achieved. As a part of recent developments on flexible payloads worldwide, the flexi TWTAs can be replaced by flexi SSPAs.
- Subjects
POWER amplifiers; TELECOMMUNICATIONS satellite equipment; SOLID state electronics; EFFICIENCY of power amplifiers; AUTOMATIC gain control
- Publication
International Journal of Microwave & Optical Technology, 2015, Vol 10, Issue 2, p126
- ISSN
1553-0396
- Publication type
Article