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Define Directivity? |
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Answer» <P>The directivity of an ANTENNA is equal to the ratio of the maximum power density P (q,F)max to its average value over a sphere as OBSERVED in the FAR field of an antenna. D = P (q,f)max / P(q,f)av. Directivity from Pattern. D = 4p / WA. Directivity from beam area (WA). The directivity of an antenna is equal to the ratio of the maximum power density P (q,f)max to its average value over a sphere as observed in the far field of an antenna. D = P (q,f)max / P(q,f)av. Directivity from Pattern. D = 4p / WA. Directivity from beam area (WA). |
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