DESIGN AND SIMULATION OF DIGITAL BEACON RECEIVER

摘要

The detailed simulation of Digital Beacon Receiver consists of Low Noise Block Converter (LNBC) and L-band Down Convertor (LBDC) by using Keysight Technologies Advanced Design System (ADS) Software. In the propagation path between satellite to ground stations, some natural phenomena, such as atmospheric gases, water vapour, oxygen molecules, clouds, rain, dust, fog, existing In different layers of the atmosphere, including troposphere can cause some impairment on the availability and quality of satellite link service periods. This natural phenomenon cause errors and problems, such as attenuation change in polarization, fading delay, and dispersion. Particularly at higher frequencies such as Ku and Ka bands, effects of those propagation phenomena will not be neglectable and they should be considered. For reliable and secure satellite communication, theoretical and experimental propagation study in different frequencies and region is essential. ISRO has setup two beacon signals at 20.2 and 30.5 GHz on board GSAT-14 for this purpose. There are different methods to study satellite wave propagation, such as radar, radiometer, signal beacon method, and satellite beacon methods. Satellite beacon method is one of the most important reliable and Inexpensive methods in comparison with the other methods. This paper presents the design simulation of the receiver setup for the above purposes.