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- W2000911261 abstract "Exact closed-form expressions for the Fresnel region electric and magnetic fields of circular loop and annular slot antennas are given in terms of the functions en(σ,γ)=(1/2π) ∫ 02π cos(nΦ) sin[σ(1–2γ cosΦ)1/2] dΦand fn(σ,γ)=(1/2π) ∫ 02π cos(nΦ) cos[σ(1–2γ cosΦ)1/2] dΦ,where - ∞ < σ < ∞ and 0 ≤ γ ≤ 1/2. For a circular loope antenna with a constant current distribution the Fresnel region fields are obtained in terms of the functions qn (σ,γ)=fn (σ,γ)+ien(σ,γ), with n =0,1, and 2, and for a cosine current distribution the Fresnel region fields are obtained in terms of the functions qn(σ,γ), with n =0,1,2,3, and 4. The magnetic field of an annular slot antenna excited by a constant voltage is expressed exactly in terms of an infinite series involving the functions qn (σ,γ). The Fresnel region magnetic field of the annular slot antenna is simply given in terms of q1(σ,γ). The functions qn(σ,γ) permitted a simple evaluation of the electric and magnetic field strength in the Fresnel region. The functions qn(σ,γ) for n =0,1,2,3, and 4 are tabulated for values of σ=0.5, 1, 2, 5, 10, 25, and 50 and values of γ from 0.01 to 0.5." @default.
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- W2000911261 date "1973-08-01" @default.
- W2000911261 modified "2023-09-26" @default.
- W2000911261 title "Fresnel region fields produced by circular loops and annular slots antennas" @default.
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- W2000911261 doi "https://doi.org/10.1063/1.1662793" @default.
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