Numerical studies on the polarities of electromagnetic wave modes in a magnetoplasma-filled cylindrical waveguide

The physical polarities of electromagnetic waves propagating in a, magnetoplasma-filled cylindrical waveguide are studied by numerical calculations and simple analytical analyses. In the plane of the frequency-axial wave number. the obtained results show that dispersion curves of right-hand polarized (RHP) and left-hand polarized (LHP) electromagnetic waves propagating in an infinite magnetoplasma, determine characteristic regions in which wave modes propagating in a magnetoplasma-filled cylindrical waveguide have different physical polarities. The frequeucy region slightly below and above w(r)1 (w(r1) denotes the lower-branch frequency of the RHP electromagnetic wave propagating in an infinite magnetoplasma) is characterized by pure or physical dominant IMP modes. In the frequency region of w(1) < w < w(r2) (w(1) and w(r2) denote the frequency of the LHP wave and the upper-branch frequency of the RHP wave propagating in an infinite magnetoplasma), except for formal IMP waveguide EHn modes with sufficient large axial wave numbers, all modes are pure or dominant physical LHP waves. The frequency region of w > w, can be thought, of as a RHP area. The physical polarity of wave modes clarified in this paper is helpful to understand the interaction between charged particles and waves propagating in a magnetoplasma-filled cylindrical waveguide.