Examples of radio environments are a single structure such as an airplane, satellite, wireless electronic device or multiple radios in a more dispersed environment, such as many wireless devices within an office setting or at outdoor cell communications sites. This dense wireless capability has resulted in an exponential growth of the radio frequency interference (RFI) problem throughout the electronics industry. With continued integration into the IoT infrastructure, modern commercial electronic devices are becoming ever more complex and feature rich with increasing wireless capability. The problem of RF interference between co-located platform integrated radios can be difficult to manage. With HyperStudy, FEKO users can perform design of experiments to further optimize designs, including other physics analysis, and with activate electrical circuits, like DC/DC converters, can be analyzed and designed.įigure 3 Examples of multi-radio and radio-digital systems that can be analyzed with ANSYS EMIT. Very complex Computer Aided Design (CAD) models can be cleaned-up and meshed in less time (including automation) thanks to HyperMesh, a leading finite element analysis pre-processor. FEKO, as part of Altair HyperWorks Computer Aided Engineering (CAE) platform, brings a set of additional and differential capabilities that can be leveraged at no extra cost due to Altair’s unique licensing system. Two special methods in FEKO for cables are Multi-Conductor Transmission Line (MTL) and the combined MoM/MTL, which is used for real problems where ground planes below the cables are not continuous. FEKO’s integrated cable modelling tool addresses EMC problems involving complex cables. Depending on the electrical size and complexity of the problem, one solver or another just needs to be used. ![]() These solvers are widely used to solve antenna design and placement, EMC, radar cross-section (RCS), bio-electromagnetics, radomes and RF devices problems, among others. In Figure 2b, fields at two points are simulated at 10 m, and for each point the vertical and horizontal polarizations are calculated.įigure 2 Car model with windscreen antenna, cable harness and equivalent source for the engine control unit (ECU) (a) and simulated electric near fields including measurement setup (b).įEKO is easy to use and has a comprehensive, accurate, reliable and fully parallelized set of solvers with true hybridization, including Method of Moments (MoM), Multilevel Fast Multipole Method (MLFMM), Finite Element Method (FEM), Finite Difference Time Domain (FDTD), Physical Optics/Large Element-Physical Optics (PO/LE-PO), Ray-Launching Geometrical Optics (RL-GO) and Uniform Theory of Diffraction (UTD). This tool, together with a windscreen antenna method specifically designed to model real windscreen antennas, permits one to analyze and find solutions related to these cases (see Figure 2). To address this, FEKO includes a complete integrated cable modeling tool that permits the analysis of the radiation (and irradiation) of cables. ![]() There can be noisy signals propagating through different cables in the car and the radiation from such cables is coupled into different antennas, adding noise, thus reducing the performance of systems like analog or digital radio. For example, coupling of radiated fields from cable harnesses to windscreen antennas (and to other types of antennas) in a vehicle, also related to CISPR-25 EMC standard (CISPR is the International Special Committee on Radio Interference or Comité International Spécial des Perturbations Radioélectriques) that sets industry test standards. ![]() There are multiple key use cases related to EMI being solved with FEKO. In addition to this, model decomposition in FEKO works with equivalent antenna and EMC sources to reduce computational requirements. One way to easily calculate antenna coupling in FEKO is through S-parameters, where users can see the effect of changing antenna loads without re-running the solver, easily visualize results for a large number of ports and plot a co-site interference matrix to visually identify and analyze critical couplings. Depending on the problem and its electrical size and complexity, users just need to select one of the solvers in FEKO. ![]() and the HIRF SE Consortium, HIRF-SE FP7 EU project). This aircraft geometry is part of the Computational Electromagnetics for EMC (CEMEMC) workshop and corresponds to a morphed version of EV55 (Intellectual Property of EVEKTOR, spol. Figure 1 Aircraft and magnetic field strength at 1 GHz computed by FEKO.Īntenna coupling in platforms is one of the sweet spots of FEKO (see Figure 1).
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