are used in the final stages of radar and radio transmitters to increase the radiated power level.

Related MCQs

• If the power input to an antenna is 100 mW and if the radiated power is measured to be 90 mW, then the efficiency of the antenna is:
• The solid area through which all the power radiated by the antenna is:
• Effective radiated power of an isotropic radiator can be given as a product of
• What is the power radiated by the antenna with gain called as?
• Power radiated from an antenna per unit solid angle is called radiation intensity.
• High directivity required in RADAR communication is satisfied using this type of antennas:
• When the separation between two lines that carry the TEM wave approaches λ the wave tends to be radiated.
• If a power amplifier has an output power of 10 W, and an amplifier gain of 16.4 dB, then the input drive power is:
• If a frequency multiplier has a multiplication factor of 10, then the increase in noise level due to frequency multiplication is:
• If the output power of an amplifier is 10 V, and the input power supplied to the amplifier is 0.229 V given that the DC voltage used is