Near Field Scatter from a Body of Revolution

Authors

  • Edward C. Michaelchuck Jr Signature Technology Office U.S. Naval Research Laboratory, Washington, D.C. 20375, USA https://orcid.org/0000-0001-9379-7984
  • Samuel G. Lambrakos Space Systems Development Division U.S. Naval Research Laboratory, Washington, D.C. 20375, USA
  • William O. Coburn Retired Electronics Engineer Army Research Laboratory, Adelphi, MD 20378, USA

DOI:

https://doi.org/10.13052/2024.ACES.J.390501

Keywords:

Body of Revolution, Method of Moments, Near Fields, Scattering, Remote Sensing

Abstract

Better understanding of electromagnetic wave propagation through vegetation and forest environments can be achieved with the aid of modeling and simulation. Specifically, modeling the coherent summation of electromagnetic waves due to both single scatter and multi-scatter effects. To accurately perform simulations in lower frequency bands, S-band and below, the Body of Revolution (BOR) Method of Moments (MoM) must be extended to calculate the scattered electric and magnetic near-fields from BOR in the presence of a plane wave. The near field interactions specifically occur during the various higher order scattering harmonics, i.e. 2nd order and greater harmonics. Additionally, the method must accurately capture scattered fields in the presence of a non-plane wave incident upon BOR. The focus of this study is modeling lossy dielectric BOR that are characteristic of vegetation and forest environments, e.g., cylinders representing tree branches. Although the formal electric and magnetic field scattering definitions are known, this report presents analytical formulations of near field scattering from BOR for this implementation of BOR-MoM. The scattered-field extensions are validated using the commercial software FEKO©, which simulates electromagnetic-wave scattering in 3D using MoM formulation of scattered fields.

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Author Biographies

Edward C. Michaelchuck Jr, Signature Technology Office U.S. Naval Research Laboratory, Washington, D.C. 20375, USA

Edward C. Michaelchuck Jr. is currently pursuing a Ph.D. in electrical engineering with a focus in applied electromagnetics at The George Washington University, Washington D.C., USA. He received a M.S. degree in electrical engineering with a concentration in applied electromagnetics from George Washington University, Washington D.C., USA, in January 2021. He received a B.S. in mechanical engineering from Rowan University, Glassboro, NJ, USA, in May 2017.

With regards to his career, he acted as a research assistant for Dr. Parth Bhavsar at Rowan University from 2015 to 2017 studying traffic monitoring systems. He interned at PSE&G Salem Nuclear Power plant in 2016. Currently, he is at the Signature Technology Office, Code 5009, at the U.S. Naval Research Laboratory, Washington, D.C., USA, since August 2017. His expertise includes multispectral signature characterization, computational electromagnetics, RF material measurements, and machine design.

Samuel G. Lambrakos, Space Systems Development Division U.S. Naval Research Laboratory, Washington, D.C. 20375, USA

Samuel G. Lambrakos received the Ph.D. degree in Physics from the Polytechnic Institute of New York University in 1983.

He is currently a Research Physicist at the U.S. Naval Research Laboratory, Code 8113, Washington, D.C., where he has been for over 35 years. His expertise is computational physics in general and has many publications, patents and awards. His recent studies concern computational materials physics and inverse spectral analysis.

William O. Coburn, Retired Electronics Engineer Army Research Laboratory, Adelphi, MD 20378, USA

William O. Coburn received his B.S. in Physics from Virginia Polytechnic Institute in 1984. He received an MSEE in Electro Physics in 1991 and Doctor of Science in Electromagnetic Engineering from The George Washington University (GWU) in 2005. His dissertation research was in traveling wave antenna design.

He has 38 years’ experience as an Electronics Engineer at the Army Research Laboratory (formerly the Harry Diamond Laboratories) primarily in the area of CEM for EMP coupling/hardening, HPM, target signatures and antennas. He retired in 2019 from the RF Electronics Division of the Sensors and Electron Devices Directorate applying CEM tools for antenna design and EM analysis.

He is a Fellow of the Applied Computational EM Society (ACES) and served on the ACES Board of Directors. He is a Member of the USNC-URSI, Commission A and B (2010), Sigma Xi and an Adjunct Professor at the Catholic University of America and GWU. Coburn has authored or coauthored over 100 publications and four patents.

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Published

2024-05-31

How to Cite

[1]
E. C. Michaelchuck Jr, S. G. Lambrakos, and W. O. Coburn, “Near Field Scatter from a Body of Revolution”, ACES Journal, vol. 39, no. 05, pp. 376–389, May 2024.

Issue

2024: Vol 39 Iss 5

Section

General Submission

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