A Theory of Millimeter Wave Propagation in Vegetation
Abstract
The millimeter wave radios currently under development for use by US Army personnel may have to transmit information through groves of trees or be placed within a wooded area for camouflage purposes. Recent experimental results have indicated that such communication capability is feasible. To support this conclusion this study was initiated. Millimeter-wave propagation in vegetation (forests) is studied using transport theory. A plane wave is assumed to enter a forest. The forest is modelled as a slab or half-space consisting of a random distribution of particles which scatter energy isotropically. The equation of radiative transfer in such a scattering and absorbing medium is solved by using Chebyshev polynomials as basis functions for series expansions of the diffuse or incoherent intensity. This choice of basis functions simplified considerably the systems of linear equations which had to be solved numerically. Curves are presented which show the range dependency of both diffuse intensity and power flux density. Also drawn are figures depicting the directional spectrum of diffuse intensity. Keywords: Coherent and incoherent field components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1984
- Accession Number
- ADA216497
Entities
People
- Felix K. Schwering
- Gerald M. Whitman
- Li-wen Chen
Organizations
- New Jersey Institute of Technology