Analysis of microwave ducting in an inhomogeneous troposphere |
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| Authors: | Se Hyun Cho James R Wait |
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| Institution: | (1) Department of Electrophysics, Polytechnic Institute of New York, USA;(2) Cooperative Institute for Research in Environmental Sciences, University of Colorado/NOAA, 80309 Boulder, Colorado, USA |
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| Abstract: | Summary Theory for the transmission of electromagnetic waves in a non-uniform troposphere is presented. The atmospheric refractive index is allowed to vary both with height and range. The formulation is facilitated by the fact that the field within a piecewise (laterally) uniform section can be represented by a discrete sum of modes that are orthogonal in the transverse plane. Using the appropriate radial wave functions, mode conversion at a junction between two laterally uniform sections is considered. The analysis is then extended to multi-section structures. A few typical profiles of refractive index are examined numerically for both uniform and non-uniform models. One of the important findings is that the lateral non-uniformities in an elevated duct will enhance the overall transmission for ground-based transmitting and receiving antennas. |
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| Keywords: | Electromagnetic waves transmission of in troposphere Microwaves transmission of in troposphere |
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