Electromagnetic Scattering from a Cavity in a Ground Plane
Author | : William D. Wood |
Publisher | : |
Total Pages | : 147 |
Release | : 1997-03-01 |
ISBN-10 | : 1423571002 |
ISBN-13 | : 9781423571001 |
Rating | : 4/5 (02 Downloads) |
Download or read book Electromagnetic Scattering from a Cavity in a Ground Plane written by William D. Wood and published by . This book was released on 1997-03-01 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electromagnetic scattering from an arbitrarily shaped open cavity embedded in a perfectly conducting, infinite ground plane is examined. The cavity is filled with a linear, isotropic, homogeneous material. The fields in the cavity interior and above the ground plane are expressed in terms of the tangential fields on the cavity surface and aperture. A coupled set of three integral equations is developed governing the tangential fields on the aperture and cavity surface. The support of the unknown tangential fields is finite. A moment-method based algorithm to approximate the solution to the integral equations for axisymmetric geometries is developed. The unknown tangential fields are expanded using piecewise-linear functions in the elevation plane and complex exponentials in the azimuth plane. Orthogonality is exploited to reduce the size of the matrix. The algorithm yields a well-conditioned numerical solution. The solution obeys the edge condition at the aperture rim. The integral equations are uniquely solvable at frequencies where other integral equation-based techniques admit spurious solutions. Radar cross section calculations are compared to experimental measurements of full-scale physical models. Results show that an open cavity can serve as an effective radar cross section enhancement device.