The theory of a thin metal antenna in anisotropic media

Computations of the Input Impedance of Antennas in Cold Magnetoplasmas in Nongyrotropic and Quasi-Stationary Cases Using the Method of Moments

“…This approximation works under such conditions as strong external magnetic field and relatively low radiation frequency (see [3]). Therefore, the permittivity tensor (5) is diagonal.…”

“…It was pointed out that the impedance of a "thin" ellipsoid equals the impedance obtained in [1]. The current distribution and impedance of a thin dipole antenna of an arbitrary length which is directed along the magnetic field in a non-gyrotropic magnetized plasma was found in [3]. Some very important additions, discussions and calculations that mainly concern short dipoles in magnetoplasmas were made in [4].…”

Current Distribution and Input Impedance of a Strip Loop Antenna Located on the Surface of a Circular Column Filled With a Resonant Magnetoplasma

“…In most papers on the subject, dipole and loop antennas in a homogeneous plasma medium are considered [1][2][3][4][5][6][7][8][9][10]. By resonant magnetoplasma, we mean a cold, collisionless magnetized plasma in which the refractive index of one of the characteristic waves tends to infinity when an angle between the wave normal direction and an external dc magnetic field approaches a certain value determined by the plasma parameters.…”

“…By resonant magnetoplasma, we mean a cold, collisionless magnetized plasma in which the refractive index of one of the characteristic waves tends to infinity when an angle between the wave normal direction and an external dc magnetic field approaches a certain value determined by the plasma parameters. In this case, the classical thin-antenna theory cannot be employed readily since no matter how small the cross section of the antenna wire might be physically, it is always possible to find some wave normal direction for which one wavelength in the plasma medium will become less than the wire cross-sectional extent and the antenna conductor will appear to be "thick" [2,3,9,10].…”

Insulated Cylindrical Antenna in a Cold Magnetoplasma

“…Many earlier works on this subject (see, e.g., [1][2][3][4] and references therein) treated the input impedance and the total field of a comparatively short dipole antenna with assumed current distribution. For the special case of a uniaxially anisotropic plasma medium, the problem of finding the current distribution and the input impedance of a cylindrical dipole antenna was considered exhaustively in [5][6][7]. The effect of the insulation of the antenna conducting surface from such a medium on the characteristics of an infinitely long cylindrical antenna was examined in [8].…”