Antennas Practice Test 2

1. Effective noise temperature T_e in terms of noise figure is ____

2. If the radiation resistance of a monopole is 18Ω, then the radiation resistance of a Hertzian dipole is _____________

3. If the antennas revolution time is 10 sec and 3 dB beam width duration is 150ms then the antenna beam width is _______

4. All Baluns provide impedance transformation.

5. Which expression suits best when the solid angle obtained by the noise source is less than antenna solid angle?

6. Find the power received by the receiving antenna if it is placed at a distance of 20m from the transmitting antenna which is radiating 50W power at a frequency 900MHz and are made-up of half-wave dipoles.

7. Gauss for the Electric Field is given by ______

8. What is the length of the half-wave dipole with bandwidth 20MHz and Quality factor 30?

9. A Balun is used to make the current along the outer side of the outer conductor along the coaxial cable _______

10. If the current input to the antenna is 100mA, then find the average power radiated from the half-wave dipole antenna?