trouble with assignment question Bsc Aviation
Hi !
I am currently doint the Bsc aviation program for pilots from upes uni.I am having some trouble with one of the questions and am wondering if anyone can help me out.
The question is as follows:
9.An ELF submarine communications linkoperates at 3 kHz. The transmitter supplies 2 MW to a vertical antenna h =100m tall with unity directivity and having resistive losses of Rlossloss resistance. Thesubmarine antenna is at a depth of 10m. Find= 1 Ω . The receiving antenna is 60m long with 5Ω
(a) the power dissipated as lossin the transmitting antenna,
(b) the efficiency of the receiving antenna,and
(c) the additional path attenuationdue to propagation through seawater.
and
8. An engineer requires a field strength of 100 V/m at150 MHz to perform radiationimmunity testing on a small (5-cm maximum dimension) radio device. Design aprocedure using a test range with adipole antenna.
i have finished the rest but am not able to solve these.pls help.
This is in relation to radio communication.