First Exam, EE508: Electromagnetic
Compatibility (EMC)

Summer 2009 Prof. Mohammed S. Al Salameh

In your solution, suitable unit should be written for each quantity. If two
different answers are given for the same problem, zero grade
will be assigned to that problem.

Prob. 1: (10 points)

A current wave on a land of a printed circuit board is described by: i= 500 cos(4p×10^{9} t-2p×50z) µA. Determine the velocity of propagation in m/s and the
wavelength in m. If the current wave travels a distance of 500 mils on the PCB land, convert this distance to meters and
determine the time delay in s and the phase shift in degrees.

Prob. 2: (15 points)

A 50 W source is attached to a 50-W receiver with 150 ft of RG58U coaxial cable (4 dB/100 ft loss at 200
MHz) as shown in the figure below. The source is tuned to 200 MHz and the meter
indicates that the output is –26 dBm. Determine the
voltage at the receiver input in dBµV. If the voltage
at the output terminals of the source is measured and found to be 25 mV, determine
the power at the input to the receiver in dBm. If the
received power at the terminals of the receiver is measured and found to be –37
dBm, determine the voltage at the output terminals of
the source in dBµV and in mV.

**Receiver**

**Transmitter**