Radiation of Whistler Waves from a Circular Phased Array of Electric Dipoles in a Magnetoplasma
摘要
We study the radiation of whistler waves by a circular phased array of electric dipoles in a homogeneous cold magnetoplasma. It is assumed that the dipole sources of the array are electrically short and aligned with an external magnetic field. Using the expansion of the excited field in terms of cylindrical vector eigenfunctions of a magnetoplasma, rigorous integral representations of the total radiated power of the array are obtained along with its partial radiated powers going to waves with different values of the azimuthal index. For the ionospheric plasma conditions, the total and partial radiation resistances corresponding to these powers are calculated. Conditions are determined under which the array can excite selectively whistler waves with a given azimuthal index in a magnetoplasma.