On the Validity of Time Domain Methods for the Calculation of Cavity Calibration Factors

摘要

This work evaluates the applicability of computational electromagnetic methods for the determination of Cavity Calibration Factors for aircraft weapon bays. Cavity Calibration Factors provide a prediction of maximum expected electrical field levels in a weapon bay for evaluating EMC, including hazards of electromagnetic radiation to ordnance. A generalized geometry is created with traits similar to an aircraft bay. The Transmission Line Matrix method is used to simulate the response of the bay across two frequency bands; 800-2500 MHz using a near field source and 5300-5900 MHz using a tuned dipole. Results are evaluated for chi-squared distribution with six degrees of freedom and the total number of modes contained at four frequencies; 915, 1830, 2250, and 5600 MHz.