Problem 3. A receiver front end has a noise figure of 10 dB and a gain of 60 dB and a bandwidth of 12 MHz. The input signal power is 10-11 W. The antenna temperature is 180° K. Find Te, Ts, Nout, SNRin and SN Rout. You may use To 290° K and Boltzmann's constant equals 1.38 x 10-23 J/K. =

Establish the relation between dB and dBm while measuring the power of an antenna.

Problem 18. The ideal peak gain of a parabolic antenna with aperture = 3 feet at 12 GHz frequency is? a. 41.0 dBi b. 41.3 dBi c. 42.0 dBi d. 42.3 dBi e. 51.5 dBi

A surface search radar has the following characteristics:i. Frequency = 5 GHz (C-Band - vertical polarization)ii. Peak power = 5 kWiii. Circular phased-array – diameter = 1.00 metersiv. Noise Figure = 2 dBv. Total System Losses = 10 dBvi. Duty factor = 5%vii. Dwell length or processing time = 1.0 msviii. Bandwidth = 1 MHz Using Matlab Plot the SNR (in dB, y-axis) versus Range (from 1 km to 50 km) for a target with a 1m2 RCS. Assume maximum antenna gain towards the target, antenna gain is the same fortransmit and receive, and unity propagation. If a SNR of 15 dB is required to detect the target, atwhat range is the target first detectable?