ECE 13_Quiz no.1_Intersem_SY 2024-2025

1.      What is the effective radiated power in of a repeater with 200 W transmitter power output, 4dB feed line loss, 4dB duplexer and circulator loss, and 10 dB feed line antenna gain?

2. 2. Determine the maximum distance between the identical antennas equidistant 50 m above sea level.

3. 3. The MUF for a transmitting station is 34 MHz and the required angle of incidence for propagation to a desired destination is 70 degrees, what is the critical frequency?

4. 4.     A cellular radio transmitter has a power output of 3W at 800MHz. It uses an antenna with a gain of 3dBi. The receiver is 5km away, with an antenna gain of 12dBi. Calculate the free-space path loss.

5.     What power density is required to produce electric field strength of 100 volts per meter in air?