Define radiating near field region( Fresnel region) of antenna.

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5. Define radiating near field region( Fresnel region) of antenna.

Radiating near-field (Fresnel) region is defined as “that region of the field of an antenna between the reactive near-field region and the far-field region wherein radiation fields predominate and wherein the angular field distribution is dependent upon the distance from the antenna. The inner boundary is taken to be the distance R≥0.62√(D 3⁄λ)and the outer boundary is taken to be the distance R < 2D2/λ where D is the largest dimension of the antenna

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