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Electromagnetic Coupling to Satellite Cavities

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
1997 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
4516 Stockbridge Ave NW Albuquerque, NM 87120
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 1997
Title: Electromagnetic Coupling to Satellite Cavities
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $281,255.00


The proposed research combines an innovative eigenvector method with other electromagnetic techniques to produce a hybrid approach towards solving the EM coupling to satellite cavity problem. The physical structure is divided into an exterior region and one or more interior regions. The exterior region is modeled with method of moments (MOM) and or hybrids of MOM with the uniform theory of diffraction. The interior is modeled with an eigenvector analysis. Since the interior is not perfectly conducting at the aperture(s), the classical eigen analysis is extended to account for coupled, generalized impedance boundary conditions at the aperture. The impedances are found from the exterior problem solution. The interior and exterior problems are first formulated in isolation (without coupling), then joined together by a method similar to Householder's Method of Modified Matrices, taken from the Air Force's GEMACS (General Electromagnetic Model for Analysis of Complex Systems) software. The research will demonstrate the proposed method in one, two, and three dimensions. The three-dimensional demonstration will be for a rotationally symmetric structure, such as optical telescope. However, the full three-dimensional theory will be formulated and documented.| Benefits: The major benefit of this research is the development of a computationally efficient method for studying electromagnetic coupling to cavities, particularly cavities with electrically large apertures. This has immediate benefits in satellite and aircraft assessment, but also commercial potential in aerospace and computer industries.|

Principal Investigator:

Edgar L. Coffey, Iii

Business Contact:

Small Business Information at Submission:

Advanced Electromagnetics
4516 Stockbridge Ave. NW Albuquerque, NM 87120

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No