Define far field( Fraunhofer) region of antenna

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6. Define far field( Fraunhofer) region of antenna

Far-field (Fraunhofer) region is defined as “that region of the field of an antenna where the angular field distribution is essentially independent of the distance from the antenna. If the antenna has a maximum overall dimension D, the far-field region is commonly taken to exist at distances greater than 2D2/λ from the antenna, λ being the wavelength.

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