Technical Brief

Adaptive Thermal Management Technique to Improve the Efficiency of SSPA for Geo-Synchronous Satellite

[+] Author and Article Information
R. J. Doshi

Space Applications Centre,
Ahmedabad 380015, India
e-mail: rameshdoshi@sac.isro.gov.in

Deepak Ghodgaonkar

Dhirubhai Ambani Institute of Information
and Communication Technology,
Gandhinagar 382007, India
e-mail: Deepak_ghodgaonkar@daiict.ac.in

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received August 20, 2017; final manuscript received September 7, 2017; published online January 17, 2018. Editor: Portonovo S. Ayyaswamy.

J. Heat Transfer 140(5), 054502 (Jan 17, 2018) (4 pages) Paper No: HT-17-1483; doi: 10.1115/1.4038425 History: Received August 20, 2017; Revised September 07, 2017

This paper presents a novel adaptive thermal management technique to improve the efficiency of solid-state power amplifier (SSPA) for geo-synchronous satellites. The thermal management for space segment is very important as it determines the reliability of the satellite. The microwave power amplifiers (MPAs), either traveling wave tube amplifiers (TWTAs) or SSPAs, are the maximum power consuming and heat dissipative elements in the satellite and their power efficiency determines weight, volume, cost, and reliability of the satellite. So, it is necessary to improve the efficiency of the SSPA. A novel technique is presented, which improves the efficiency of the SSPA and hence, saving of costly DC power generation on-board and reduction of the heat dissipation.

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Grahic Jump Location
Fig. 4

Proposed balanced configuration for RF MOSFET

Grahic Jump Location
Fig. 3

Balanced amplifier configuration

Grahic Jump Location
Fig. 2

Single-ended amplifier

Grahic Jump Location
Fig. 1

Thermal resistance from device to outer space



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