Antenna’s efficiency is given by the ratio of __________(a) Losses(b) Physical aperture to effective aperture(c) Signal power to noise power(d) Effective aperture to physical apertureI got this question by my college director while I was bunking the class.The doubt is from Practical Link Budget Design Using Path Loss Models topic in portion Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Antenna’s efficiency is given by the ratio of __________(a) Losses(b

1.	Antenna’s efficiency is given by the ratio of __________(a) Losses(b) Physical aperture to effective aperture(c) Signal power to noise power(d) Effective aperture to physical apertureI got this question by my college director while I was bunking the class.The doubt is from Practical Link Budget Design Using Path Loss Models topic in portion Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile
Answer» Correct answer is (d) Effective aperture to physical aperture To elaborate: The larger the antenna aperture the larger is the resulting signal power DENSITY in the desired DIRECTION. The ratio of effective aperture to the physical aperture is the antenna’s EFFICIENCY.

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