Electromagnetic Wave Propagation Through Composite Lossy Structures.
Abstract
A mathematical model was derived to determine the propagation constant of normally incident electromagnetic energy through a dielectric honeycomb loaded with a lossy material. Tests were conducted across a frequency band of 2.6 GHz to 11.0 GHz measuring both phase shift and attenuation. Results of the tests were compared to the theoretical properties of the dominant mode, the HE sub 11 mode. At the lower end of the frequency band tested, the HE sub 11 mode was found to have phase shift and attenuation within 5% of the experimental data, but as frequency increased, the accuracy of the model decreased due to the presence of higher order modes. Formulas for wave impedance, effective permeability, and effective permittivity for each mode were also derived on the basis of the model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1974
- Accession Number
- ADA008669
Entities
People
- Thomas B. Lindahl
Organizations
- Air Force Institute of Technology