Model the complexity
With Simcenter 3D electromagnetics, ultra-large-scale problems (large electric size) can be investigated for models of different length scales (small antennas integrated into large systems). Interrogate the effects of user-defined complex materials, element properties, boundary conditions and excitations, then use the improved values to update the associated CAD model's design instantly.
Directly import a wire harness from Capital software with its automatic generation of the 3D paths and assignment of properties, then analyze the electromagnetic compatibility (EMC) performance.
The uniform theory of diffraction (UTD) is a "ray" method, based on an asymptotic solution of the Maxwell equations. UTD is applicable when a radiating source interacts with a scattering structure whose dimensions are much larger than the field wavelength (for example: ships, vehicles or scenario configurations like airports, factories, cities, etc.). Under these hypotheses, similarly to the optics case, electromagnetic scattering can be described as the combination of discrete contributions (reflections and diffractions of different orders) from a number of "hot points" distributed on the structure (edge, wedge, vertex) according to relatively simple geometric laws relating to the propagation of rays. UTD manages real materials characterized through transmission and reflection coefficients.
MoM solves the Maxwell equations in a discrete form without making any approximation: the problem is discretized and transformed into a system of linear equations. Both standard (direct) and fast (iterative with Multilevel Fast Multipole Algorithm) solution approach is available. Different boundary conditions are managed: Electric Field Integral Equation (EFIE), Impedance Boundary Conditions (IBC), Combined Field Integral Equation (CFIE), and Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT).
Preconditioners (for example: Multi-Resolution, SPLU, ILUT) speed up the convergence of the iterative solution approach. Low-frequency stabilization methods (S-PEEC formulation) solves the Low-Frequency Breakdown problem (very ill-conditioned linear system). The multi-port approach minimizes the computational burden for the evaluation of active solutions. MoM is suitable in case accuracy is needed for complex problems (in terms of geometries and materials) and when the interaction between the radiation source and the scattering structure is strong.
Iterative Physical Optics (IPO) is a current-based iterative high-frequency technique. IPO is applicable in the evaluation of the interaction between a radiating source and a scattering structure whose dimensions are larger than the field wavelength (for example: antenna reflectors, radomes, vehicles, etc.). The application of the equivalence theorem for the description of the scattering mechanism and adoption of the iterative process allows the reconstruction of the interactions between objects in complex scenarios without resorting to ray-tracing. The computational capabilities are optimized by exploiting of cutting-edge technologies: GPU computing, Fast Far-Field Approximation algorithm, and iterative relaxation techniques. Thin sheet and impedance boundary conditions formulations are available.
Perform wire harness EMC performance analysis and solve for a multiconductor transmission line network to improve emission, susceptibility and crosstalk within the bundle and between bundles.