S-band Monopulse Satellite Tracking System

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Dr. Dudás Levente
Department of Broadband Infocommunications and Electromagnetic Theory

The topic of my thesis is the development of a satellite tracking system based on monopulse principle. Using the hardwere that has been designed and produced, it is possible to follow the trajectory of certain satellites.

The first part of the thesis is a describtion of the theory of monopulse tracking systems, such as benefits, realization and principles. After that the controlling station of MaSat-1 (the first Hungarian satellite) is being discussed with detailed description of it's construction, emphasizing the usage and relevance of S-band microwave systems. The documentation gives also some details of the paraboloic reflector antenna, since the hardware is being constructed for it's usage.

As for the design, first I'm considering my project as an independent sub-system. After it's integration to the existing ground-station system the measurements have been done.

First step of design was to create the primer radiator that is being integrated into the paraboloic. Next step is to design and manufacture a planar high-frequency signal processing system to obtain the channels of the monopulse comparator network. A detailed description is also given how the signals of the three outputs of the monopulse coupler are being processed and measured.

Last part of the thesis is the introduction of the mixer, amplifier and analog-digital converter subsystem that is being obtained by a DVB-T receiver module. I'm also describing it's user interface that makes the signal processing visible on a display.

As a closure I'm summarizing all the job that I have done, evaluating all the results and giving a review about my ideas for the future how the monopulse-based satellite tracker system can be developed further.


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