This lesson covers the concept of Ground Segment in Satellite Communication. It begins with an introduction to the topic, followed by a detailed explanation of the types of ground segments, also known as earth stations. The lesson further delves into the subsystems inside the earth station and the types of antennas used. It also discusses the measurement techniques of two important parameters of the earth station - the receive characteristics and the transmit characteristics. The lesson also explains the different types of earth stations based on their mobility and communication capabilities. It concludes with a discussion on the sizing of the earth station, focusing on the antenna size and power amplifier size.
00:20 - Introduction
02:23 - Earth stations or earth terminals
10:17 - Electronics inside the station
16:03 - Sizing of the antenna
19:00 - Antenna gain and parabolic reflector
23:52 - Large station antenna
25:40 - How small beam width reduces interference to adjacent satellite
- Ground Segment, also known as Earth Station, can be on the ground, mobile on the ground surface, ocean, air, or another satellite.
- The types of earth stations include handheld, railway mobile, transportable, and portable.
- The communication capabilities of earth stations can be categorized into receive only, transmit only, and transmit-receive.
- The sizing of an earth station is primarily based on the antenna size and the power amplifier size.
- The antenna gain is a crucial factor for station sizing, with high gain antennas requiring larger diameters and having smaller beam widths.