Analysis of Multi-Layer Composite Cavity Using FEKO
James E. Stanley (1), Dawn H. Trout (2), Susan K. Earles (1), Ivica N. Kostanic (1), and Parveen F. Wahid (2)
(1) Florida Institute of Technology, Melbourne, FL; (2) University of Central Florida, Orlando, FL
Modeling of a large cavity containing multiple layers inside the structure has been studied using equivalent impedance approximations along with simplified single ray tracing analysis. This modeling effort investigates the effects of radiating with a source enclosed in a large vacant composite structure relative to a short wavelength. The development of the model involves the completion of a two step process. First, the heritage geometric reduction and approximation is investigated. This particular investigation involves an approach that is an application of Poynting’s Theorem. This work was performed by Hallett and Reddell at Gooddard Space Flight Center in 1998. For this comparison, the Physical Optics technique available in the commercial tool FEKO, is used to model a generic multi-layer payload fairing (hollow cone connected to a hollow cylinder) with a radiating source to determine the resonant cavity effects within the fairing as another approximation baseline. The intent is to provide predictions for the electric field levels if a transmitter either deliberately or unintentionally is activated. The results show comparable outcomes with the heritage calculation and FEKO software tool. However, FEKO shows added electric field distributions within the composite fairing cavity.
25th Annual Review of Progress in Applied Computational Electromagnetics
2009
March
643-647
