A 50 MHz sky wave takes 4.04 ms- to reach a receiver via re-transmission from a satellite 600 km above earth’s surface. Assuming re-transmission time by satellite negligible, find the distance between source and receiver. If communication between the two was to be done by Line of Sight (LOS) method, what should size and placement of receiving and transmitting antenna be?

Question

Philoid · Accepted Answer

Given,

Height of satellite,

Let the distance from the transmitter to the satellite be x and the distance between the receiver and the transmitter be 2d.

Let us find x.

Using PGT,

Distance between the source are receiver

We also know that

where h_T and h_R are the height of the transmitting and receiving antenna

respectively.

Here, and