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This paper is focused on input impedance optimization of a stripline. The stripline for electromagnetic susceptibility testing represents a radiating structure which is composed of one active and one or more grounded conductors. The characteristic impedance of the stripline is given by the dimension and the material between conductors. If the characteristic impedance does not match to the output impedance...
This paper is focused on optimization of electrical properties of 50 ohm stripline which was described in international standard for the automotive industry ISO 11452-5. The standard shows the dimension of the stripline but information about impedance matching is missing — and this information is crucial for a power amplifier connection, especially in terms of VSWR parameter. In this paper connection...
When designing a TEM transmission line cell for electromagnetic compatibility susceptibility or immunity tests, its input impedance must be properly defined in order to deliver the maximum power to the device under test. The closed-form solution, relating the cell geometry with the characteristic impedance Zc, is possible only for the simplest “canonical” transmission line transverse cross-sections...
This paper deals with an experimental measurement and a numerical simulation of shielding effectiveness of a perforated shielding enclosure using finite element method (FEM). There are shown possibilities of model definitions, differences between 2D and 3D models are discussed. Important part of simulation is the possibility to verify the model results - the simulation result should be verified in...
This paper deals with the cavity resonance of perforated shielding boxes, which decrease shielding effectiveness. Shielding effectiveness is very important part of electromagnetic interference (EMI) - the properly designed shielding box eliminates undesired interference from the electric equipment which is placed into the box (power converters, control unit). In this paper, the illustrative example...
This paper deals with industrial DC/DC converters in terms of EMC. The first part of paper describes basic information from standard EN 55022:2006, which establishes EMI limits for DC/DC converters. The second part shows the most interesting measured values of samples industrial DC/DC converters.
This paper deals with PSpice simulations of normalized and unnormalized varistor tests. At first are describe basic characteristic parameters of varistor. The next section of paper introduces to standard EN 61000–4–5:2006 Testing and measurement techniques — surge immunity test, which is applicable to device for surge protection against high voltage transient and surges. Combination waveform 1.2/50μs...
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