Electromagnetic waves along an infinitely long and thin conducting wire in a magneto-ionic medium

Abstract

Electromagnetic fields of an infinitely long co nducting cylinder in a magneto·ionic medium with axial stati c magnetic fi eld are theoreti call y analyzed. Expressions of the electromagnetic field s and the di spersion formulas are ob taine d. Explicit approximate expressions of the relative propagation constants for th e case of an ex tremely thin wire are derived and their dependence on th e plasma and the cyclotron frequen cies is di scussed. The behavior of th e electromagnetic fi elds around the wire is also di sc ussed.

Current distribution and input admittance of an infinite cylindrical antenna in anisotropic plasma

“…Many papers on this subject have been published in recent years and may roughly be classified into the following four categories: 1) the study of the far-field pattern and radiation resistance of a short dipole with assumed current distribution (Bunkin [l 1, Kogelnik Kuehl [3], Arbel and Felsen [4], Mittra and Deschamps [5], Staras [6], Wait [7], Seshadri [8], and others); 2) the study of the input impedances of a short dipole or a small loop with assumed current distribution by using the quasistatic theory (Balmain [ 9 ] , Duff and Mittra [lo]); 3) the study of the input impedance of a short dipole antenna with assumed sinusoidal current distribution (Ament, Katzin, Katzin, and Koo [ll]); 4) the study of the propagating waves guided along a perfectly conducting infinite wire (Mushiake [12] and Seshadri [13]). …”

Insulated Cylindrical Antenna in a Cold Magnetoplasma

“…Evaluating H φ (ρ, p) and H z (ρ, p) at ρ = a 0 and substituting them into (18), after some lengthy algebra we arrive at…”

“…Then the truncation of the antenna to a finite length is performed, which leads to reflections of current waves of similar type from the antenna ends. Using such a waveguide approach, it was shown that, in general, the current on an uninsulated antenna immersed in a resonant magnetoplasma and excited by a voltage source comprises contributions from an eigen (bound) mode, which can exist in some frequency bands [18,19], and from continuous-spectrum waves [14,17]. In some cases important for applications, the eigenmode contribution is found to dominate the current distribution on a fairly thin antenna excited by a delta-function voltage source [17].…”

Guided electromagnetic waves observed on a conducting ionospheric tether

“…Because the high-frequency extremities of the observed curves can be fitted well to (2) by adjusting it is worthwhile to see what happens when the surrounding dielectric is changed to that of a cold magnetoplasma. Mushiake [1965] .............. •,,, ' .............. . ............... • .…”