Title :
Frequency Transformation of a Whistler Wave by A Collapsing Plasma Medium in a Cavity: FDTD Solution
Author :
Kalluri, Dikshitulu K. ; Eker, Sebahattin ; Ehsan, Monzurul M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Lowell, MA, USA
fDate :
7/1/2009 12:00:00 AM
Abstract :
A whistler wave in a cavity filled with a magnetoplasma medium is strongly affected when the plasma source is switched-off. Due to such a collapse of the plasma, the whistler wave is converted to an electric- field-intensified higher frequency wave (with an order of magnitude upshift of the frequency). In principle, it is possible to transform a 2.45 GHz source radiation to 300 GHz Terahertz radiation, with significant strength of the electric field. Finite difference time domain (FDTD) technique is used to study the effect of the following parameters: the rate of collapse, spatial plasma-density profile, collision frequency as well as the switching angle.
Keywords :
finite difference time-domain analysis; plasma collision processes; plasma density; plasma magnetohydrodynamics; whistlers; FDTD solution; collision frequency; finite difference time domain technique; frequency 2.45 GHz to 300 GHz; frequency transformation; magnetoplasma medium; plasma collapse; plasma source; spatial plasma-density profile; whistler wave; Electromagnetic scattering; Electrons; Finite difference methods; Frequency conversion; Magnetosphere; Plasma density; Plasma properties; Plasma sources; Plasma waves; Time domain analysis; Cavity; finite difference time domain (FDTD); frequency transformer; time-varying medium; whistler wave;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2019721
