Theoretical Analysis of Microwave and Millimeter Wave Integrated Circuits Based on Magnetic Films
Annual rept. 1 Oct 1989-30 Sep 1990
MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
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An inversion algorithm is presented based on a recently developed inversion method referred to as the Renormalized Source-Type Integral Equation approach. The objective is to overcome some of the limitations and difficulties of the iterative Born technique. It recasts the inversion, nonlinear in nature, in terms of the solution of a set of linear equations however, the final inversion equation is still nonlinear. The derived inversion equation is an exact equation which sums up the iterative Neuman or Born series diverges hence, the name Renormalized Source-Type Integral Equation Approach. The coupled-wave theory is generalized to analyze the diffraction of waves by chiral gratings for arbitrary angle of incidence and polarizations. Numerical results are illustrated for the Stokes parameters of diffracted Floquet modes versus the thickness of chiral gratings with various chiralities. Both horizontal and vertical incidences are considered for illustration. The diffracted waves from chiral gratings are in general elliptically polarized and at some particular instances, it is possible for chiral gratings to convert a linearly polarized incident field into two nearly circularly polarized Floquet modes propagating in different directions.
- Electricity and Magnetism