University Events

Description: Topic: An Investigation of The Mesh Approximation Using The Spectral Projection Model for Electromagnetic Scattering From Circular Conducting Cylinders

Location: Lester W. Cory Conference Room, Science & Engineering Building (SENG), Room 213A

Abstract:
In the field of electromagnetics, the relevance of scattering patterns has increased in recent years. Because of the widespread use of scattering within electromagnetic applications such as radar and communications, several modeling techniques have been developed to model and analyze the far field scattering patterns. In this project, the Spectral Projection Method was tested against the Method of Moments and the Balanis method to determine its accuracy when calculating the scattered fields from a wire cylindrical mesh. In addition to proving the Spectral Projection Method is a valid and more efficient method than the Method of Moments, this project also investigated the reliability of a 2D wire cylindrical mesh to replicate a solid conducting cylinder. The wire mesh has potential industry applications in radar, communications, and other fields.

This project researches a new computational modeling technique, called the Spectral Projection Method, and compares it against two well-known methods, the Method of Moments and the theoretical Balanis method. Three separate codes were created and tested across the same parameters (number of observation points, incidence angle, and radius) to allow the metrics to be analyzed. For the first objective, the far-field scattering pattern and induced surface currents were analyzed. For the second, the electric fields inside the cylinder were analyzed.

The results show that all three methods produce equal results for the far-field and induced surface current patterns. Additionally, the fields inside the cylinder indicate that the wire mesh is a good approximation of a solid conducting cylinder provided a minimum of 90 wires (observation points) is used to create the mesh. Together, these results show that the Spectral Projection Method is both a valid numerical technique for calculating scattered fields, and a more computationally efficient method that the Method of Moments. Furthermore, the results show that wire mesh is a good approximation for solid cylinders when a minimum number of wires is considered.

Note: All ECE Graduate Students are ENCOURAGED to attend.
All interested parties are invited to attend. Open to the public.

Advisor: Dr. Dayalan Kasilingam
Committee Members: Dr. David A. Brown, Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth; Dr. Paul J. Gendron, Associate Professor, Department of Electrical & Computer Engineering, UMASS Dartmouth

*For further information, please contact Dr. Dayalan Kasilingam via email at dkasilingam@umassd.edu.