You are designing a satellite communications system with the
following parameters:
Satellite parabolic antenna has a diameter of 1 meter
Earth Station parabolic antenna has a diameter of 2.5 meters
Operating frequency of the system is 4 GHz
Transmission system bandwidth of 106 Hz
Satellite transmitter power of 10 watts
Assume earth receiver operating at room temperature (294
kelvin)
a. What is the maximum distance the satellite can be from earth,
in kilometers, so that the SNRdb at the earth...
A parabolic satellite dish reflects signals to the dish’s focal
point. An antenna designer analyzed signals transmitted to a
satellite dish and obtained the probability density function
f(x)=cæ1- 1 x2öfor
0<x<2,whereXisthedistance(inmeters)fromthecentroidofthe ç 16
÷
èø
dish surface to a reflection point at which a signal arrives.
Determine the following:
Value of c that makes f (x) a valid probability density
function
?(? < 0.4
?(0.1<?<0.4
?(?)
?(?)
A C-band station has an antenna with a transponder
gain of 54dB.The
transmitter output power is set to 100 W at a frequency of 6.10
GHz.
The signal is received by a satellite at a distance of 37,500 km
through
an antenna with diameter of 6m. The signal is then routed to
a
transponder with a noise bandwidth of 36 MHz, and a gain of
110dB
1. Calculate the path loss.
2. Calculate power at the output port of the...
(a) What is the resolving power of a telescope with an aperture
4” when observing at a wavelength 600 nm?
(b) Explain if the limitation in (a) matters when doing
observations in Hong Kong. (Use not more than 100 words)