Question

Bell Telecommunications Ltd has proposed a satellite system for

international communication using a satellite in low earth orbit.
Both the transmit and receive antennas are inclined at 30∘ from the earth's
surface and they have gains 50dBi and 40dBi respectively.
The antenna gains at satellite are 20dBi each The transmitter power is 30dBm
and the low earth orbit is 250Km from the earth's surface.
The frequency for uplink is 6Ghz and downlink is 4Ghz. Assuming that the other
losses are negligible, Determine:
i) Effective Isotropic Radiated Power in dB(0 dB);
ii) Received signal power in dBm(−160dBm).

Answer 1

EIRP is calculated by adding the transmitter power to the transmit antenna gain. Received signal power is determined using the Friis transmission equation considering the gain of both antennas and the separation distance.

Step-by-step explanation:

The question involves determining the effective isotropic radiated power (EIRP) and received signal power in a proposed satellite communication system by Bell Telecommunications Ltd for international communication.

The given parameters include the transmit and receive antennas' gains, the transmitter power, and the low earth orbit distance from the Earth's surface.

To calculate the EIRP, we will add the transmitter power in dBm to the transmit antenna gain in dBi (since other losses are negligible). For the received signal power, we use the Friis transmission equation which takes into account the gains of the transmit and receive antennas and the distance between them.