ECE Master of Science Thesis Defense By: Matthew James Sylvia
When: Friday,
February 12, 2021
10:00 AM
-
12:00 PM
Where: > See description for location
Cost: Free
Description: Topic: Spectral Projection-Based Analysis of Electromagnetic Scattering from Elliptical, Conducting Cylinders to Study the Angular Coherence of Radar Backscatter
Zoom Teleconference: https://umassd.zoom.us/j/95060320252
Meeting ID: 950 6032 0252
Passcode: 645910
ABSTRACT:
In many electromagnetic engineering applications, the use of modeling of electromagnetic scattering and radiation has become more widespread. A well-known method for calculating the scattered electromagnetic field from an object is the Method of Moments (MoM) which is the solving of an integral equation over a finite, discretized space where the known boundary conditions. The Remote Sensing Group (RSG) at UMass Dartmouth has developed a new method for modeling electromagnetic scattering using of the Addition Theorem for Bessel and Hankel functions. The model separates the source and observation points and defines the governing equations as a projection of the spectral signatures of the source currents on to the spectral signatures of the observation points. This method, known as the Spectral Projection Model (SPM), was tested for accuracy when calculating the scattered fields as well as the time it took to calculate these fields compared to the MoM approach. From there multiple calculations were made with variations in the axial ratio and size of the cross-section to find a relationship between the angular coherence of the received field and the shape and size of the scattering object with a variation in the angle of incidence. The angular coherence of the scattered signal determines the resolution of radar imaging process. Radar imaging systems utilize geometric diversity obtained from measurements from a wide variety of different viewing angles to generate high resolution images of the scene. In this study, the impact of shape and size on the angular coherence is investigated by simulating radar scattering from a variety of different elliptically shaped cylinders using the SPM model.
NOTE: All ECE Graduate Students are ENCOURAGED to join the zoom teleconference. All interested parties are invited to join.
Advisor: Dr. Dayalan Kasilingam
Committee Members: Dr. Paul J. Gendron and Dr. Yifei Li, Department of Electrical & Computer Engineering, UMass Dartmouth
*For further information, please contact Dr. Dayalan Kasilingam via email at dkasilingam@umassd.edu.
Zoom Teleconference: https://umassd.zoom.us/j/95060320252
Meeting ID: 950 6032 0252
Passcode: 645910
ABSTRACT:
In many electromagnetic engineering applications, the use of modeling of electromagnetic scattering and radiation has become more widespread. A well-known method for calculating the scattered electromagnetic field from an object is the Method of Moments (MoM) which is the solving of an integral equation over a finite, discretized space where the known boundary conditions. The Remote Sensing Group (RSG) at UMass Dartmouth has developed a new method for modeling electromagnetic scattering using of the Addition Theorem for Bessel and Hankel functions. The model separates the source and observation points and defines the governing equations as a projection of the spectral signatures of the source currents on to the spectral signatures of the observation points. This method, known as the Spectral Projection Model (SPM), was tested for accuracy when calculating the scattered fields as well as the time it took to calculate these fields compared to the MoM approach. From there multiple calculations were made with variations in the axial ratio and size of the cross-section to find a relationship between the angular coherence of the received field and the shape and size of the scattering object with a variation in the angle of incidence. The angular coherence of the scattered signal determines the resolution of radar imaging process. Radar imaging systems utilize geometric diversity obtained from measurements from a wide variety of different viewing angles to generate high resolution images of the scene. In this study, the impact of shape and size on the angular coherence is investigated by simulating radar scattering from a variety of different elliptically shaped cylinders using the SPM model.
NOTE: All ECE Graduate Students are ENCOURAGED to join the zoom teleconference. All interested parties are invited to join.
Advisor: Dr. Dayalan Kasilingam
Committee Members: Dr. Paul J. Gendron and Dr. Yifei Li, Department of Electrical & Computer Engineering, UMass Dartmouth
*For further information, please contact Dr. Dayalan Kasilingam via email at dkasilingam@umassd.edu.
Contact:
ECE: Electrical & Computer Engineering Department 508.999.9164 http://www.umassd.edu/engineering/ece/
Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering