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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Le-Wei Li Pang-Shyan Kooi Tat-Soon Yeo Mook-Seng Leong Jin-Hou Koh |
| Copyright Year | 1997 |
| Description | Author affiliation: Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore (Le-Wei Li) |
| Abstract | The electromagnetic radiation of an electric dipole in a medium with four layers is examined using dyadic Green's functions in their vector wave eigenfunction expansion forms. In this four-layered model, two lossy dielectric layers are used to represent the canopy and trunks of vegetation that covers the ground plane. The dyadic Green's functions for four-layered media are first applied to derive the integral expression of the electric fields. Asymptotic evaluations of the integrals are then made using the steepest descent method, and the branch-cut integrations in complex planes; and correspondingly the direct wave, multi-reflected waves, and lateral waves along various interfaces have been obtained. Numerical calculations of the transmission losses in the presence of vegetation have been carried out for typical forest. |
| Starting Page | 997 |
| Ending Page | 1000 |
| File Size | 359886 |
| Page Count | 4 |
| File Format | |
| ISBN | 962442117X |
| DOI | 10.1109/APMC.1997.656375 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1997-12-02 |
| Publisher Place | Hong Kong |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Dielectric losses Attenuation Radiowave propagation Electromagnetic analysis Electromagnetic propagation Electromagnetic scattering Propagation losses Feeds Dielectric constant Permittivity |
| Content Type | Text |
| Resource Type | Article |
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