Electromagnetic responses of a metallic conical frustum cabin with one coaxial feeding monopole antenna

Abstract

Electromagnetic responses of a metallic conical frustum cabin with one coaxial feeding monopole antenna, illuminated by an intentional electromagnetic pulse (IEMP), are studied in this paper. There are several slots on the cabin wall with different sizes and orientations. The mathematical treatment is based on novel hybrid finite difference time domain (FDTD) method, where coaxial feeding, transfer impedance coupling and thin wire antenna models are integrated together for handling such a complex three-dimensional (3D) composite structure. The revised antenna port coupling model is verified by comparing the calculated terminal voltage responses of the coaxial feeding cable with that of commercial CST Microwave Studio. Parametric studies are further carried out to show the variations of its terminal voltages for different IEMP waveforms, incident directions and polarizations.

EMI effect simulation of braided cable network using a hybrid FDTD method

“…However, the primary shortcoming of staircase error restricts its applicability in handling the interaction of EM waves with complex objects incorporating small features and multi‐level coupling paths. Thus, several modified FDTD methods have been proposed to take hybrid EMI effects of different coupling paths into account by combining the Maxwell's equations, TL equation, and circuit theory together . In Ye et al and Xie et al, a SPICE model, combined with the FDTD method, has been built for some braided and multi‐core cables to study the transient responses.…”

“…[8][9][10][11][12][13][14][15][16] In Ye et al 8 and Xie et al, 9 a SPICE model, combined with the FDTD method, has been built for some braided and multi-core cables to study the transient responses. In the literature, [10][11][12][13][14][15] the interactions among different structures, such as TLs and circuits, are considered at the same time, but very simple circuit models have been adopted in their problems. Specially, in Bağci et al, 16,17 the authors have presented some cosimulation methods with TLs and circuit modules by using time-domain integral equation method.…”