Assessment of Integrated Circuits Emissions With an Equivalent Dipole-Moment Method

RF Desensitization in Wireless Devices

“…The magnitude and phase of the equivalent dipole moment M y can be easily obtained using the least square method as given in Eqs. (6) and (7). The H-field patterns from reconstructed dipole moment source are shown and the magnitude and phase from the reconstructed M y dipole moment agree well with the magnitude and phase of the measured H-field patterns from the cell phone.…”

“…The dipole moment source model is versatile as it contains radiation physics, at the same time it does not require knowing any internal circuit geometry. The validity of the dipole moment source model to be used for RF desensitization was experimentally proven by using a practical cell phone [7,8]. A transfer function between the dipole moment source and RF antenna was experimentally measured and used to represent the EMI coupling to the RF antenna.…”

The Identification Method of the Sources of Radiated Electromagnetic Disturbances on the Basis of Measurements in the Near-Field Zone

“…It does not have limitations in terms of the equipment dimensions, but it has also many drawbacks, such as: -time-consuming analysis of the results of studies, because for each measuring point at least one graph is obtained; the more configuration cases -the more graphs, hence the analysis of results becomes complicated, -it is required to strictly stick to the test plan and configuration settings, to ensure repeatability, -orientation of the probe in space is changed manually, hence the imprecision of the probe orientation in space can result in measurement errors and the distortion of the image of disturbance emission from the device. Summarising, the location methods for disturbance sources known from the literature, using measurements in the near-field zone for printed circuit boards PCB [13,14,15,17,20,23] and for integrated circuits [21], are a good approach leading to the design compliance with the requirements of standards, and later on to a smooth passing through the stage of EMC tests in the laboratory. However, in the case of a more complex equipment, e.g.…”

“…The resolution of measurements depends on dimensions of the measuring probe and the precision of the probe positioning system. Paper [17] presents results of studies on the correlation between the results obtained by the method presented in the document IEC TS 61967-3:2014 [16] and the results of studies obtained with the use of a TEM chamber acc. to IEC 61967-2 [18].…”

An Improved Equivalent Dipole Moment Source Model Based on Regularization Optimization Method for Near Field-Far Field Conversion

“…Another well-known source reconstruction technique based on electric and magnetic dipoles is mentioned in [12] and [13]. The main research on equivalent dipole source is composed of the plane-wave spectrum theory and the source reconstruction principle [14], [15]. An actual source can be replaced by a set of infinitesimal dipoles of different types, amplitudes, phases, locations and orientations [16].…”