Development of a homodyne satellite transmitter system using an ultra-low phase noise amplifier

Yasser Asrul Ahmad (P57905 )

Please use this identifier to cite or link to this item: https://ptsldigital.ukm.my/jspui/handle/123456789/457628

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DC Field	Value	Language
dc.contributor.advisor	Mohd Alauddin Mohd Ali, Professor Dr.
dc.contributor.author	Yasser Asrul Ahmad (P57905 )
dc.date.accessioned	2023-09-12T09:11:34Z	-
dc.date.available	2023-09-12T09:11:34Z	-
dc.date.issued	2013-04-25
dc.identifier.other	ukmvital:82004
dc.identifier.uri	https://ptsldigital.ukm.my/jspui/handle/123456789/457628	-
dc.description	Requirement of high data rate in X-band frequencies is mainly due to the remote sensing data to be downloaded from a passive or active sensor onboard a satellite. The advance in microwave technology has made the high data rate transmission possible in X-band frequency for small satellite platform, in Low Earth Orbit (LEO). However, transmitting large bandwidth without sacrificing the performance of a transmitter for a small satellite is demanding due to its limited resources in terms of power and weight. Lower cost and component count have made homodyne architecture gaining more attention, but better performances of traditionally heterodyne transmitters are widely implemented. The main objective of this research is to develop a homodyne high data rate X-band transmitter for small satellites in low earth orbit with a comparable performance to heterodyne architecture. Standards on satellite communications from the Consultative Committee of Space Data Standardization (CCSDS) are studied to obtain the required performance. The inclusion of an ultra-low phase noise amplifier in the homodyne architecture enables the transmitter to produce comparable performance to a heterodyne system. This is due to the advantages of the amplifier that is able to deliver a phase noise of -160 dBc/Hz @10kHz offset. The transmitter is simulated and tested using the design parameters in terms of phase noise, compression, spurious, harmonics, output power, occupied bandwidth and adjacent channel power ratio (ACPR). The transmitter linear model is estimated by developing it in spreadsheet. A gain analysis is performed initially in the spreadsheet to ascertain that the transmitter is able to amplify the desired signal. The transmitter model is then developed in the Agilent Advance System Designer 2009 (ADS) software. The software is used to perform detailed design and analysis of the nonlinearity behavior of the transmitter. ADS software uses the Harmonics Balance Simulator to analyze the transmitter in the frequency domain. System level simulation is performed in the time domain to simulate the design parameters for the modulated signal. Based on the simulated results the prototype of the satellite transmitter hardware is developed and tested in the laboratory environment. The analysis and testing are performed to ensure that the transmitter meets the desired specification for space usage. Based on the test results, the transmitter is able to deliver absolute phase noise of -102.2 dBc/Hz @10kHz offset achieving the recommendation by CCSDS. The simulation indicates the feasibility of homodyne architecture for high data rate transmission in X-band; however the test results from the actual prototype of such architectur,Master
dc.language.iso	eng
dc.publisher	UKM, Bangi
dc.relation	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina
dc.rights	UKM
dc.subject	Remote sensing data
dc.subject	Satellite transmitter
dc.subject	Artificial satellites in telecommunication
dc.title	Development of a homodyne satellite transmitter system using an ultra-low phase noise amplifier
dc.type	theses
dc.format.pages	86
dc.identifier.callno	TK5104 .Y347 2013 3
dc.identifier.barcode	001613
Appears in Collections:	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina

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