Abstract: The present invention relates to a method and an apparatus for detecting anomalies in an operation behavior of a device under test (DUT), in particular during electromagnetic susceptibility (EMS) measurements. The apparatus comprises a monitoring unit adapted to generate a first set of observation data of the operation behavior of a DUT while the DUT is not subjected to disturbances and adapted to generate a second set of observation data of the operation behavior of a DUT while the DUT is subjected to disturbances and comprising an AI module trained with the first set of observation data generated by the monitoring unit and adapted to process the second set of observation data to detect anomalies in the operation behavior of the DUT while being subjected to the disturbances and comprising a reporting unit adapted to reporting anomalies in the operation behavior of the DUT detected by the trained AI module.

Abstract: A measurement system is provided. Said measurement system comprises a first measurement chain, a second measurement chain, a radio frequency hybrid coupler, a first radio frequency port connected to the first measurement chain via the radio frequency hybrid coupler, a second radio frequency port connected to the second measurement chain via the radio frequency hybrid coupler, a first attenuator or a first radio frequency switch for the first radio frequency port, and a second attenuator or a second radio frequency switch for the second radio frequency port. In this context, a first transmission coefficient of the first attenuator or the first radio frequency switch is controllable. In addition to this, a second transmission coefficient of the second attenuator or the second radio frequency switch is controllable.

Abstract: An over-the-air measurement system for testing a reconfigurable intelligent surface (RIS) includes a signal generator circuit configured to generate at least one RF signal, at least one RF antenna configured to transmit the at least one RF signal and to receive at least one reflected RF signal, and a positioner unit configured to hold an RIS circuit in an adaptable position. The at least one RF antenna includes only one RF antenna or only one RF antenna array functioning both as transmitter and receiver of the at least one RF signal. The measurement system is configured such that far-field conditions of the at least one transmitted RF signal are provided at the RIS circuit, and that far-field conditions of the at least one reflected RF signal are provided at the at least one RF antenna. The measurement system is configured to analyze the signals to determine a reflection parameter.

Abstract: A system for testing a device under test, DUT, comprises a holder configured to hold the DUT, wherein the DUT comprises at least one reconfigurable intelligent surface, RIS. A first antenna array generates plane waves at a position of the at least one RIS when the DUT is arranged on the holder. The first antenna array can generate plane waves having different angles of incidence at the position of the at least one RIS. A second antenna array receives a reflection signal originating from a reflection of a plane wave, wherein the plane wave is generated by the first antenna array and is reflected from the at least one RIS. A determination unit determines an angle of incidence on the second antenna array, using the received reflection signal.

Abstract: A device for early warning of a device under test (DUT) failure during an electromagnetic susceptibility (EMS) test is provided. The device is configured to gradually increase perturbation of a DUT during the EMS test. The device is further configured to receive a monitoring result from the DUT being exposed to the increased perturbation, and to determine, by a machine learning (ML) model evaluating the monitoring result, a probability value of the monitoring result corresponding to a faultless operation mode of the DUT. The ML model was trained based on monitoring results obtained during undisturbed operation of the DUT.

Abstract: The invention relates to a method and a system for determining test signals for electromagnetic susceptibility, EMS, testing of a device-under-test, DUT. The method comprises the steps of: receiving at least one DUT parameter which defines a property of the DUT; receiving at least one environmental parameter which defines an electromagnetic environment, EME, in which the DUT is to be used; receiving information on an EM emission behavior, in particular an emission spectrum, of the DUT; and inputting the at least one DUT parameter, the at least one environmental parameter and the information on the EM emission behavior to a machine learning, ML, or artificial intelligence, AI, model. The ML or AI model is configured to determine one or more test signals for EMS testing of the DUT based on the at least one DUT parameter, the at least one environmental parameter and the information on the EM emission behavior.

Abstract: A system for testing a device under test, DUT, comprises a holder configured to hold the DUT, wherein the DUT comprises at least one reconfigurable intelligent surface, RIS. A first antenna array generates plane waves at a position of the at least one RIS when the DUT is arranged on the holder. The first antenna array can generate plane waves having different angles of incidence at the position of the at least one RIS. A second antenna array receives a reflection signal originating from a reflection of a plane wave, wherein the plane wave is generated by the first antenna array and is reflected from the at least one RIS. A determination unit determines an angle of incidence on the second antenna array, using the received reflection signal.

Abstract: A method and apparatus for removal of a parasitic coupling of a signal source to an output of an antenna array comprising at least one antenna element connected via an associated controllable switch to a signal receiver connected to the output of said antenna array, the method includes measuring a parasitic coupling signal received by the signal receiver connected to the output of said antenna array while all switches of the antenna array are switched off and a first reference signal received by a reference signal receiver; measuring a total reception signal for each antenna element and a second reference signal; calculating a parasitic coupling free reception signal for each antenna element by subtracting a ratio between the measured parasitic coupling signal and the measured first reference signal from a ratio between the total reception signal.

Abstract: A device for early warning of a device under test (DUT) failure during an electromagnetic susceptibility (EMS) test is provided. The device is configured to gradually increase perturbation of a DUT during the EMS test. The device is further configured to receive a monitoring result from the DUT being exposed to the increased perturbation, and to determine, by a machine learning (ML) model evaluating the monitoring result, a probability value of the monitoring result corresponding to a faultless operation mode of the DUT. The ML model was trained based on monitoring results obtained during undisturbed operation of the DUT.

Abstract: The invention relates to a method and a system for determining test signals for electromagnetic susceptibility, EMS, testing of a device-under-test, DUT. The method comprises the steps of: receiving at least one DUT parameter which defines a property of the DUT; receiving at least one environmental parameter which defines an electromagnetic environment, EME, in which the DUT is to be used; receiving information on an EM emission behavior, in particular an emission spectrum, of the DUT; and inputting the at least one DUT parameter, the at least one environmental parameter and the information on the EM emission behavior to a machine learning, ML, or artificial intelligence, AI, model. The ML or AI model is configured to determine one or more test signals for EMS testing of the DUT based on the at least one DUT parameter, the at least one environmental parameter and the information on the EM emission behavior.

Abstract: The present invention relates to a method and an apparatus for detecting anomalies in an operation behavior of a device under test (DUT), in particular during electromagnetic susceptibility (EMS) measurements. The apparatus comprises a monitoring unit adapted to generate a first set of observation data of the operation behavior of a DUT while the DUT is not subjected to disturbances and adapted to generate a second set of observation data of the operation behavior of a DUT while the DUT is subjected to disturbances and comprising an AI module trained with the first set of observation data generated by the monitoring unit and adapted to process the second set of observation data to detect anomalies in the operation behavior of the DUT while being subjected to the disturbances and comprising a reporting unit adapted to reporting anomalies in the operation behavior of the DUT detected by the trained AI module.

Abstract: A measurement system is provided. Said measurement system comprises a first measurement chain, a second measurement chain, a radio frequency hybrid coupler, a first radio frequency port connected to the first measurement chain via the radio frequency hybrid coupler, a second radio frequency port connected to the second measurement chain via the radio frequency hybrid coupler, a first attenuator or a first radio frequency switch for the first radio frequency port, and a second attenuator or a second radio frequency switch for the second radio frequency port. In this context, a first transmission coefficient of the first attenuator or the first radio frequency switch is controllable. In addition to this, a second transmission coefficient of the second attenuator or the second radio frequency switch is controllable.

Abstract: A method and apparatus for removal of a parasitic coupling of a signal source to an output of an antenna array comprising at least one antenna element connected via an associated controllable switch to a signal receiver connected to the output of said antenna array, the method includes measuring a parasitic coupling signal received by the signal receiver connected to the output of said antenna array while all switches of the antenna array are switched off and a first reference signal received by a reference signal receiver; measuring a total reception signal for each antenna element and a second reference signal; calculating a parasitic coupling free reception signal for each antenna element by subtracting a ratio between the measured parasitic coupling signal and the measured first reference signal from a ratio between the total reception signal.

Abstract: Field probe for conducting antenna measurements by phaseless measurements. An antenna arrangement comprises three or four antennas for measuring RF waves. The measured RF waves are pairwise added and subtracted. Based on the result of the adding and subtracting operations, magnitude patterns and phase patterns are determined. In this way, magnitude and phase patterns of electromagnetic waves emitted by a device under test can be determined by a completely passive device.

Abstract: A system for over-the-air testing of a device under test includes a measurement antenna, a reference antenna, a device under test capable of wirelessly transmitting and/or receiving complex radio frequency signals, and an analyzer. The analyzer has at least two ports, wherein the reference antenna is connected with a first port of the analyzer. The measurement antenna is connected with a second port of the analyzer. The analyzer is capable of determining a phase difference and a power ratio of radio frequency signals received via the measurement antenna and the reference antenna. The analyzer is capable of performing an IQ analysis on complex radio frequency signals. Further, a method of over-the-air testing of a device under test is disclosed.

Abstract: A system for over-the-air testing of a device under test includes a measurement antenna, a reference antenna, a device under test capable of wirelessly transmitting and/or receiving complex radio frequency signals, and an analyzer. The analyzer has at least two ports, wherein the reference antenna is connected with a first port of the analyzer. The measurement antenna is connected with a second port of the analyzer. The analyzer is capable of determining a phase difference and a power ratio of radio frequency signals received via the measurement antenna and the reference antenna. The analyzer is capable of performing an IQ analysis on complex radio frequency signals. Further, a method of over-the-air testing of a device under test is disclosed.

Abstract: Field probe for conducting antenna measurements by phaseless measurements. An antenna arrangement comprises three or four antennas for measuring RF waves. The measured RF waves are pairwise added and subtracted. Based on the result of the adding and subtracting operations, magnitude patterns and phase patterns are determined. In this way, magnitude and phase patterns of electromagnetic waves emitted by a device under test can be determined by a completely passive device.

Abstract: A switching system for sequential switching of radio frequency paths is provided. The switching system comprises a plurality of inputs and a plurality of outputs, a plurality of switching elements respectively connected between the plurality of inputs and the plurality of outputs and a trigger module. In this context, multiple signal paths are defined between the plurality of inputs and the plurality of outputs corresponding to specific switch positions of the plurality of switching elements. In addition, the trigger module is adapted to generate a trigger signal in order to switch between the multiple signal paths.

Abstract: A method for performing active over-the-air measurements of a device under test with an antenna is described. The device under test with the antenna is provided. The device under test is arranged randomly in a measurement zone assigned to a measurement antenna. The phase center of the antenna of the device under test is determined. Measurement positions for the active over-the-air measurements are calculated that depend on an offset between the phase center determined and a center of the measurement zone. Further, a measurement system for over-the-air measurements is described.

Abstract: A system for optimizing signal path calibration is provided. The system comprises at least one transmitting module, at least one measuring unit, connected to the transmitting module via a signal path and a processing unit. In this context, the measuring unit is adapted to perform power measurement on the signal path. In addition, the processing unit is adapted to configure the measuring unit with respect to a predefined measurement accuracy and a predefined test time duration.