Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)

CubeSat in a low earth orbit primarily uses a UHF transmitter with a fixed RF output power. In this paper, the design of the CubeSat transmitter with adaptive power controlability is presented. The design drive is to optimise the SNR and overcome the variability of the propagation path length due...

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Main Authors:	Jaswar, Fitri Dewi, Abd. Rahman, Tharek, Ahmad, Yasser Asrul
Format:	Article
Language:	English
Published:	2019
Subjects:	TK5101 Telecommunication. Including telegraphy, radio, radar, television TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices TK7885 Computer engineering TL787 Astronautics
Online Access:	http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/1/76664_Design%20and%20Validation%20of%20an%20Adaptive%20Cubesat.pdf

id	iium-76664
recordtype	eprints
spelling	iium-766642019-12-10T03:35:42Z http://irep.iium.edu.my/76664/ Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC) Jaswar, Fitri Dewi Abd. Rahman, Tharek Ahmad, Yasser Asrul TK5101 Telecommunication. Including telegraphy, radio, radar, television TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices TK7885 Computer engineering TL787 Astronautics CubeSat in a low earth orbit primarily uses a UHF transmitter with a fixed RF output power. In this paper, the design of the CubeSat transmitter with adaptive power controlability is presented. The design drive is to optimise the SNR and overcome the variability of the propagation path length due to different ground station elevation angles by adjusting its transmitting power. The TVAC test is conducted to validate the performance of the adaptive function in the transmitter. The TVAC is used to emulate the satellite condition in an outer space environment. Four thermal cycles starting from +60°C to -20°C with less than 10-5Pa pressure condition are employed, which was conducted at the KIT CeNT, Japan. The transmitter was integrated inside the satellite structure as a complete CubeSat system. The output power of the transmitter is tested from 0.5W to 2W based on the proposed satellite adaptive mode. The frequency stability of the transmitter is monitored and complies with an average of 70% below requirement, which is less than 2ppm. The results indicate that the RF output power is adjustable to operate as the proposed CubeSat adaptive transmitter in a thermal vacuum condition, which was first developed in Malaysia. 2019-11-23 Article PeerReviewed application/pdf en http://irep.iium.edu.my/76664/1/76664_Design%20and%20Validation%20of%20an%20Adaptive%20Cubesat.pdf Jaswar, Fitri Dewi and Abd. Rahman, Tharek and Ahmad, Yasser Asrul (2019) Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC). International Journal of Recent Technology and Engineering (IJRTE), 8 (3S2). pp. 207-212. ISSN 2277-3878 https://www.ijrte.org/wp-content/uploads/papers/v8i3S2/C10391083S219.pdf 10.35940/ijrte.C1039.1083S219
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TK5101 Telecommunication. Including telegraphy, radio, radar, television TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices TK7885 Computer engineering TL787 Astronautics
spellingShingle	TK5101 Telecommunication. Including telegraphy, radio, radar, television TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices TK7885 Computer engineering TL787 Astronautics Jaswar, Fitri Dewi Abd. Rahman, Tharek Ahmad, Yasser Asrul Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
description	CubeSat in a low earth orbit primarily uses a UHF transmitter with a fixed RF output power. In this paper, the design of the CubeSat transmitter with adaptive power controlability is presented. The design drive is to optimise the SNR and overcome the variability of the propagation path length due to different ground station elevation angles by adjusting its transmitting power. The TVAC test is conducted to validate the performance of the adaptive function in the transmitter. The TVAC is used to emulate the satellite condition in an outer space environment. Four thermal cycles starting from +60°C to -20°C with less than 10-5Pa pressure condition are employed, which was conducted at the KIT CeNT, Japan. The transmitter was integrated inside the satellite structure as a complete CubeSat system. The output power of the transmitter is tested from 0.5W to 2W based on the proposed satellite adaptive mode. The frequency stability of the transmitter is monitored and complies with an average of 70% below requirement, which is less than 2ppm. The results indicate that the RF output power is adjustable to operate as the proposed CubeSat adaptive transmitter in a thermal vacuum condition, which was first developed in Malaysia.
format	Article
author	Jaswar, Fitri Dewi Abd. Rahman, Tharek Ahmad, Yasser Asrul
author_facet	Jaswar, Fitri Dewi Abd. Rahman, Tharek Ahmad, Yasser Asrul
author_sort	Jaswar, Fitri Dewi
title	Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
title_short	Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
title_full	Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
title_fullStr	Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
title_full_unstemmed	Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)
title_sort	design and validation of an adaptive cubesat transmitter system using a thermal vacuum chamber (tvac)
publishDate	2019
url	http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/ http://irep.iium.edu.my/76664/1/76664_Design%20and%20Validation%20of%20an%20Adaptive%20Cubesat.pdf
first_indexed	2023-09-18T21:48:16Z
last_indexed	2023-09-18T21:48:16Z
_version_	1777413596594044928

Design and validation of an adaptive Cubesat transmitter system using a Thermal Vacuum Chamber (TVAC)

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