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THE SCATTERING OF A PLANE ELECTROMAGNETIC WAVE BY A LINEAR ARRAY OF CENTER-LOADED CYLINDERS
NAVAL RESEARCH LAB WASHINGTON DC
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The scattering properties of a linear array of parallel, center- loaded, cylindrical elements have been investigated with the ultimate objective of obtaining information about the character of the array from its scattered field. To this end, a set of integral equations for the currents induced in the linear array illuminated by an incident plane wave were derived from the equations of Maxwell and the boundary conditions at the surface of the array. Using a zero-order approximation to the form of the axial distribution of the induced currents in the array, a pair of complex current coefficients were calculated numerically for each element of the array using a technique incorporating the set of integral equations. The approximation technique gives reasonable accuracy in the calculation of the H-plane, far-zone, scattered field from the induced currents, provided the electrical half-length of the elements of the array is less than 5 pi4 radians.
APPROVED FOR PUBLIC RELEASE