Title :
On Polarization Coupling in the PO and PTD Approximations
Author :
Ufimtsev, Pyotr Ya
Author_Institution :
EM Consulting, Los Angeles, CA
Abstract :
The physical optics (PO) and the physical theory of diffraction (PTD) are in extensive use in the antenna design and RCS calculation. The specific feature of these approximations is the phenomenon of polarization coupling. This phenomenon has been known since 1975, but its physical nature is still not explained in the literature. In the present communication, it is shown that this phenomenon is caused by the charges at the edge of a scattering structure, which are accumulated there due to the discontinuity of the PO current component normal to the edge.
Keywords :
antennas; electromagnetic wave diffraction; electromagnetic wave polarisation; electromagnetic wave scattering; physical optics; PTD approximation; RCS calculation; antenna design; diffraction theory; physical optics approximation; polarization coupling; scattering structure; Adaptive arrays; Antenna arrays; Antenna theory; Array signal processing; Frequency; Image sampling; Microwave antenna arrays; Optical polarization; Quantization; Signal processing algorithms; Diffraction; electromagnetic waves; equivalent edge currents; physical optics (PO); physical theory of diffraction (PTD);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.2007397
