Improved numerical diffraction coefficients with application to frequency-selective surfaces
- 1 June 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 40 (6) , 606-612
- https://doi.org/10.1109/8.144593
Abstract
A method for numerically determining diffraction coefficients for arbitrary scattering centers is described. In this method finite bodies possessing scattering centers of the type of interest are first analyzed via the moment method. The various contributions to the total scattered fields are then isolated by solving low-order simultaneous equations obtained by writing expressions for the fields in terms of unknown diffraction coefficients. The method yields numerical diffraction coefficients in angular sectors where previous methods fail (e.g., near grazing angles), and can be applied in the context of measured as well as simulated scattering data. Finite frequency-selective surfaces are shown to be amenable to analysis with ray-optics techniques, and several two-dimensional examples are given with comparisons to far- and near-field moment method results.Keywords
This publication has 8 references indexed in Scilit:
- Analysis of blended rolled edge reflectors using numerical UTDIEEE Transactions on Antennas and Propagation, 1990
- Hybrid method computation of diffraction by trailing edges using reciprocityPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1990
- Method for treatment of finite-sized dichroic structures using a surface impedance approachElectronics Letters, 1988
- The effects of the truncation and curvature of periodic surfaces: a strip gratingIEEE Transactions on Antennas and Propagation, 1988
- Numerical diffraction coefficients in the shadow transition regionIEEE Transactions on Antennas and Propagation, 1988
- Numerical computation of diffraction coefficientsIEEE Transactions on Antennas and Propagation, 1987
- A uniform geometrical theory of diffraction for an edge in a perfectly conducting surfaceProceedings of the IEEE, 1974
- Geometrical Theory of Diffraction*Journal of the Optical Society of America, 1962