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The ratio of terminating impedance to the power density of the incident wave is called as?(a) Maximum effective aperture(b) Maximum allowable power(c) Directivity(d) GainThe question was posed to me in a job interview.Origin of the question is Radio Propagation and Noise Characteristics in portion Terrestrial Radio Navigation System of Avionics

Answer»

Right OPTION is (a) Maximum effective aperture

To explain I would say: Maximum effective aperture is defined as the ratio of TERMINATING IMPEDANCE to the POWER density of the incident wave. It is also CALLED the effective area of an antenna and is given by Dλ/4π.



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