Electromagnetic coupling by a wire through a cavity-backed circular aperture in an infinite screen: Final report, Part B

Technical Report · Mon Aug 01 04:00:00 EDT 1988

OSTI ID:6202937

Wright, D B

The problem of a wire penetrating a circular aperture in an infinite screen and coupling energy into a cavity behind that screen is considered. We formulate an integral equation in terms of the electric field in the aperture. This integral equation is solved using two approximate methods: a zeroth-order approximation valid at low frequencies, and the method of moments. In addition, we introduce an equivalent circuit model to aid in our physical interpretation of the problem. Numerical results for the interior current on the wire and for the equivalent circuit admittance parameters are presented in order to provide a comparison between the two approximations. Inside the cavity, we examine the components of the electric field as a function of position. Finally, the exterior magnetic field far from the aperture is studied as a function of frequency. We examine the relationship between interior resonance features associated with the presence of the cavity and observations of the exterior field. 31 refs., 46 figs., 3 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6202937
• Report Number(s): UCRL-21158; ON: DE89007717
• Country of Publication: United States
• Language: English

Related Subjects

657002* -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics & Mathematical Models-- (1987-1989)
BOUNDARY-VALUE PROBLEMS
CAVITIES
COUPLING
DOCUMENT TYPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC FIELDS
ELECTRONIC CIRCUITS
EQUATIONS
EQUIVALENT CIRCUITS
FUNCTIONS
GREEN FUNCTION
INTEGRAL EQUATIONS
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
PROGRESS REPORT
WIRES