6. Consider a directional antenna that has a gain of 10 dB and radiates 20 Watts. How much power an isotropic antenna must radiate to provide the same signal power in the preferred direction?

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 SNRout. You may use To=290° K and Boltzmann's constant equals 1.38 x 10-23 J/K.

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

An antenna has a directive gain of 25 dB. If the antenna is transmitting at a frequency of 10 GHz, then what will be the effective aperture of the antenna?