Prenos satelitskega signala v frekvenčnem pasu Ka

ŽONTA, DAVOR (author), Batagelj, Boštjan (mentor)

Diplomska naloga predstavlja satelitsko komunikacijo v frekvenčnem pasu Ka. Predstavljene so tirnice, po katerih krožijo sateliti. Opisana je sestava satelita in antene ter potrebna oprema na Zemlji za uspešno vzpostavitev zveze. Na kratko so opisani frekvenčni pasovi, namenjeni uporabi v satelitskih komunikacijah in zgodovina razvoja ter uporabe frekvenčnega pasu Ka. Podrobneje je predstavljeno usmerjanje in sledenje antene, potek signala skozi sistem do oddajne antene v Ka-frekvenčnem pasu ob primeru uporabe v podjetju STN d.d. ter določanje oddajnih parametrov antene. Predstavljena je tudi najpogostejša uporaba frekvenčnega pasu Ka pri prenosu s satelita. Opisani so vplivi ozračja in vremenski vplivi na prenos v frekvenčnem pasu Ka. S poizkusom in izračunom je podrobneje predstavljen problem segrevanja antene in njegov vpliv na signal.

• Language: Slovenian
• Keywords: frekvenčni pas Ka, sestava satelita, sestava antene, prenos na satelit, sledenje antene, slabljenje signala, vremenski vplivi, segrevanje antene
• Work type: Undergraduate thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-82777
• Publication date in RUL: 23.05.2016

Secondary language

• Language: English
• Title: Ka-band satellite signal transmission

Abstract

This thesis describes satellite communication in Ka-band. First it portray satellite orbits in use. It represents a satellite and antenna assembly and Earth equipment needed to build a successful connection. It shortly describes frequency bands used in satellite communications and history of development and use of Ka-band. We look at how the antenna is directed to a satellite and how antenna tracking works, the route of a signal through the system to the transmitting Ka-band antenna as it is used in STN d.d. and how the transmit parameters are determined. It describes the most common use of Ka-band in satellite downlink. Also described are atmosphere and weather influences on Ka-band. It is shown with an experiment and calculations, how heating has an effect on an antenna and the transmitting signal.

• Keywords: Ka-band, satellite assembly, antenna assembly, satellite uplink, antenna tracking, attenuation, weather influences, antenna heating