Consider a communication system operating at 3 GHz along a path of 15 km over sea water with…
Consider a communication system operating at 3 GHz along a
path of 15 km over sea water with relative dielectric constant of 81 and
conductivity of 5 S/m. Transmitting antenna is located on a tower of 20 m high.
The receive antenna height hR is required to be higher than 16 m.
a. Explain if these antennas are in LOS of each other,
assuming worst-case conditions?
b. Can the sea water be considered as a good conductor at
this frequency?
c. Determine the angle of arrival with respect to horizon.
d. Determine the reflection coefficient.
e. Can earth curvature be neglected at this
Consider a communication system operating at 3 GHz along a
path of 15 km over sea water with relative dielectric constant of 81 and
conductivity of 5 S/m. Transmitting antenna is located on a tower of 20 m high.
The receive antenna height hR is required to be higher than 16 m.
a. Explain if these antennas are in LOS of each other,
assuming worst-case conditions?
b. Can the sea water be considered as a good conductor at
this frequency?
c. Determine the angle of arrival with respect to horizon.
d. Determine the reflection coefficient.
e. Can earth curvature be neglected at this frequency?
f. Determine the optimal height for the receiving antenna in
order to maximize the received signal level.
g. Determine and compare the signal level for free space
transmission with the level found in part (f ).
h. Using the above-determined receiving antenna height,
determine the signal level when the sea level is decreased by 2 meters due to
tide and compare this value with the optimal value found in part (f ).
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