全球卫星转发器市场报告(2016-2020年)
Transponders receive an electromagnetic or radiofrequency signal from the Earth, amplify it, and send it back to Earth. Transponders are designed to exhibit various functionalities and they work based on a particular frequency band like C, Ku, and Ka. Depending on the signal strength and encoding/decoding techniques used for transmission and reception, a transponder can change the frequency, polarization, and modulation technique for signal regeneration, amplification, and retransmission back to Earth. The speed and centrifugal force of the satellite depend on the distance from the Earth's orbit. The speed and the gravitational pull of the satellite orbiting closer to Earth are higher than the ones that are orbiting farther. Different satellites placed in different orbits require transponders as per their band spectrum such as C, Ku, and Ka, for various communication and broadcasting purposes.