Downlink frequency in satellite communication

In satellite communication, the uplink frequency is higher than the downlink frequency because the attenuation level increase with an increase in frequency . The power at the ground station (Base Station) is more than compared to the power available at the satellite.

Explanation: The original signal being transmitted from the earth station to the satellite is called the uplink , and the re-transmitted signal from the satellite to the receiving stations is called the downlink. … As a result, most satellites contain multiple transponders, each operating at a different frequency.

The satellite transmitter generates a signal that would jam its own receiver ; if both uplink and downlink shared the same frequency.