By Topic

Analysis of natural frequencies of cavities and scatterers using an impulsive current model

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Erez, E. ; Dept. of Electr. Eng., Technion, Haifa, Israel ; Leviatan, Y.

A recently suggested (see Y. Leviatan et al., ibid., vol.36, p.1722-1734, Dec. 1988) method of moments solution to generalized formulations of electromagnetic scattering from perfectly conducting and material bodies of smooth shape is used to compute the natural frequencies of such bodies. The field inside the body and the field scattered from the body are expanded by means of the field of impulsive current sources (elemental dipoles) situated a distance away from (rather than on) the boundary. The key feature of this approach is the fields anywhere in space can be evaluated analytically, yielding a substantial saving of computation time in comparison with standard on-surface formulations. Impulsive expansion functions are used for the fictitious currents that simulate the source-free fields in the relevant regions, and a point matching procedure is adopted for the enforcement of the boundary conditions. The result is a generalized impedance matrix whose singularities in the complex frequency plane represent the natural frequencies of the body. The numerical solution is simple to execute, computationally efficient, and can be applied to a broad class of bodies of smooth shape. Results demonstrating the excellent accuracy of the procedure are given

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:38 ,  Issue: 4 )