Question
Download Solution PDFDirectivity of an isotropic antenna
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Directivity: The ratio of the radiation intensity in a given direction from an antenna to the radiation intensity averaged over all directions is termed directivity.
The gain of an antenna is the ratio of the radiation intensity in a given direction to the radiation intensity that would be obtained if the power were radiated isotropically.
The gain of an antenna takes the directivity into account.
Isotropic Antenna: It radiates equally in all directions.
Mathematically, the gain is defined as:
G = ηeD
ηe = Antennas efficiency
D = Directivity of the antenna
Hence the Directivity of an isotropic antenna is 1.
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