Variable permittivity dielectric material loaded stepped-horn antenna
Variable permittivity dielectric material loaded stepped-horn antenna
Variable permittivity dielectric material loaded stepped-horn antenna
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where the propagation constant is expressed ask is the cut-off wavenumber of the mn-th mode and ki = k0.1 is the wavenumberin the i-th waveguide section. k, is the free space wavenumber.Figure 2.4Thmn and Ten,„are the cross-sectional eigenfunctions for the given boundaries inwhere δmn is the Kronecker delta symbol.The eigenfunctions are normalized so that for a wave amplitude of unity, the totalpower carried by the corresponding mode is(2.9)