PROPAGATION CONSTANT ALONG A CYLINDRICAL ANTENNA IMMERSED IN A WARM PLASMA. PARTS I AND II.
SYLVANIA ELECTRONIC SYSTEMS-EAST WALTHAM MASS APPLIED RESEARCH LAB
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Part One of this report considers a lossless plasma. The propagation constant is shown to be close to that of the plasma mode in an unbounded plasma in the frequency range for which the electromagnetic EM and the plasma P space waves are excited, that is for frequencies above the plasma frequency. This applies to antennas without or with an insulating sheath. Part Two considers an insulated antenna in a lossy plasma. A guided wave with a propagation constant close to that of the electromagnetic mode in an unbounded plasma is now possible in addition to the guided plasma wave, that is the only one which satisfies the radiation condition for a lossless plasma. It is, therefore, appropriate to include in the approximation for the current distribution along the antenna parts which have propagation constants of the order of magnitude of P and EM waves. Author