Antennas that radiate energy only in a specified are called anisotropic antennas.
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The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:
A source has a cosine power pattern that is bidirectional. Given that the directivity of a unidirectional source with cosine power pattern has a directivity of 4, then the directivity of the unidirectional source is:
A source has a sine squared radiation intensity power pattern. The directivity of the given source is:
Considering distance as a parameter, two types of field zones can be defined around an antenna.
If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m² and the intrinsic impedance of the medium is 377 ?, then the power received by the antenna is:
Any signed negative binary number is recognised by its ________
The parameter through which 16 distinct values can be represented is known as ________
If the decimal number is a fraction then its binary equivalent is obtained by ________ the number continuously by 2.
The representation of octal number (532.2)8 in decimal is ________
The decimal equivalent of the binary number (1011.011)2 is ________
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