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DFCCIL EE/EC Electromagnetic Fields QUIZ - 7
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Question 1
Which one of the following is the correct relationship between an antenna gain G and effective area Ae?
Question 2
If aperture efficiency is 70%, the directivity D of a parabolic dish antenna as a function of its radius is
Question 3
A dipole is 0.1 m long and has an internal resistance of 0.1 ohm. The dipole has radiation resistance of 0.3 Ω. The antenna efficiency is
Question 4
An antenna has a power input of 40 π watts and an efficiency of 90 %. The radiation intensity has been found to have a maximum value of 150 Watts/unit solid angle. Directivity of the antenna is
Question 5
An antenna with an efficiency of 90% has a maximum radiation intensity of 0.,5 W/Steradian. Calculate the directive gain of the antenna when the input power to the antenna when the input power to the antenna is 0.4 W
Question 6
Two communication antennas A and B, are operating at 300 MHz and other at 3 GHz respectively and having same gain, are illuminated with identical flux density of -100 dBW/m2. What is the relation between the received powers (PA : PB)?
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Jun 26ESE & GATE EC
