Abstract: A measurement system is provided. The measurement system includes a device under test (DUT), an antenna, and a measuring device connected to the antenna. The measuring device is configured to scan for spurious emissions of the DUT for at least one frequency. The measuring device is further configured to determine at least one spurious frequency. The measuring device is further configured to perform a measurement at each of the at least one spurious frequency.

Abstract: A measuring system for calibrating an antenna array is provided. A parameter setting unit modifies an input signal of a first antenna or a first antenna group, using operating parameters. A signal generator generates a first measuring signal and provides it to the parameter setting unit and to a second antenna or a second antenna group of the antenna array. A measuring antenna receives a second measuring signal composed of a signal emitted by the first antenna or first antenna group and a signal emitted by the second antenna or second antenna group. A power meter measures the power of the second measuring signal. An evaluation device determines a measured interference signal from the measured power of the second measuring signal, and preferably also determines the operating parameters used by the parameter setting unit based upon the measured interference signal and position information.

Abstract: A radio frequency test system for testing a device under test has a plane wave converter antenna array having a plurality of antennas and several signal distribution networks. Each of the antennas is connected to at least two of the several signal distribution networks, wherein each of the signal distribution networks is configured to feed a signal to be simulated to the plane wave converter antenna array to create a plane wave signal at the device under test having a predefined angle of incidence and a predefined signal magnitude. Further, a measurement setup as well as a method for testing a device under test are shown.

Abstract: A measurement system is provided. The measurement system includes a device under test (DUT), an antenna, and a measuring device connected to the antenna. The measuring device is configured to scan for spurious emissions of the DUT for at least one frequency. The measuring device is further configured to determine at least one spurious frequency. The measuring device is further configured to perform a measurement at each of the at least one spurious frequency.

Abstract: A method for determining a phase center of an antenna under test is described wherein the antenna under test is placed on a positioning unit within an anechoic space of a measurement system, the positioning unit being configured to set the antenna under test in at least one angular orientation. At least the phase of a measurement signal assigned to the antenna under test is determined in dependency of the angular orientation of the antenna under test. The phase center of the antenna under test is determined by using least-square techniques while taking the phase of the measurement signal into account, and an uncertainty of the determination of the phase center is determined based on the outcome of the determination of the phase center of the antenna under test by using the least-square techniques. In addition, a measurement system is described.

Abstract: A test device for a wireless communication device comprises a device support that accommodates the wireless communication device, a movable position determination device, a number of wireless probes for communicating with the wireless communication device, and a mechanical probe support, wherein the wireless probes are mechanically coupled to the probe support and the probe support is mechanically coupled to the position determination device.

Abstract: A system for determining the radiation pattern of an antenna array comprising a plurality of antenna elements comprises a signal generator for generating a test signal, a number of probes for measuring a magnitude of the signals emitted by the antenna elements when driven with the test signal in a first surface and in a second surface, wherein the distance of the first surface to the antenna elements is smaller than the distance of the second surface to the antenna elements, and a pattern calculation unit for calculating the radiation pattern of the antenna array based on the magnitudes measured in the first surface and the second surface.

Abstract: The present invention provides to a test arrangement and a test method for testing a device under test. In particular, a test arrangement is provided com-prising a device for vectorial analysis of measurement signals and at least one further device for analyzing only the power of radio frequency signals related to the de-vice under test. By simultaneously operating the device for vectorial analysis and the device for analyzing the power, an efficient testing can be achieved.

Abstract: A test arrangement for wirelessly testing a device under test comprises a number of test antennas that are placed in the near-field of the device under test for receiving wireless signals from the device under test and/or transmitting wireless signals to the device under test, a channel modifier coupled to the test antennas for weighting the signals received by the test antennas and/or the signals transmitted by the test antennas according to predetermined weighting parameters, and a near-field to far-field transformer that is coupled to the channel modifier and transforms the weighted signals received by the test antennas into far-field signals.

Abstract: A test system for testing a device under test is described, which comprises an antenna array having a plurality of antenna elements and an adjustment unit having a Fresnel structure. The adjustment unit is placed between the antenna array and the device under test. Further, a method for testing a device under test is described.

Abstract: A calibration system for calibrating an antenna array comprising a plurality of antenna elements comprises a signal generator for generating a predetermined test signal and, the signal generator being couplable to the antenna elements for providing the test signal to the antenna elements, a number of probes for measuring at least one physical parameter, which is influenced by emissions of the antenna elements, and providing respective measurement signals, and a position determination unit for determining based on the measurement signals the positions of the antenna elements as calibrated positions.

Abstract: A test system is used for testing multiple input multiple output capabilities. The system comprises a device under test, a movable antenna and a signal simulation unit. Furthermore, the signal simulation unit simulates at least two multiple input multiple output channels in order to test the multiple input multiple output capabilities of the device under test.

Abstract: A measuring device comprises a processing unit, a first antenna adapted to receive a first signal, and a second antenna, adapted to receive a second signal. The processing unit comprises a baseline unit adapted to determine a baseline variance of a first variable and/or a second variable. Moreover, it comprises a variance unit adapted to determine a variance of the first variable and/or the second variable. The first variable and the second variable are each at least initially derived from at least the first signal and the second signal. The processing unit furthermore comprises an error unit, adapted to determine if a systematic error is present, based on the baseline variance and the variance of the first variable and/or the second variable.

Abstract: A test arrangement for wirelessly testing a device under test comprises a number of test antennas that are placed in the near-field of the device under test for receiving wireless signals from the device under test and/or transmitting wireless signals to the device under test, a channel modifier coupled to the test antennas for weighting the signals received by the test antennas and/or the signals transmitted by the test antennas according to predetermined weighting parameters, and a near-field to far-field transformer that is coupled to the channel modifier and transforms the weighted signals received by the test antennas into far-field signals.

Abstract: The present invention provides to a test arrangement and a test method for testing a device under test. In particular, a test arrangement is provided com-prising a device for vectorial analysis of measurement signals and at least one further device for analysing only the power of radio frequency signals related to the de-vice under test. By simultaneously operating the device for vectorial analysis and the device for analysing the power, an efficient testing can be achieved.

Abstract: A measuring device comprising a plurality of analog signal adjusters, and an antenna array, comprising a plurality of antennas is provided. Each of the plurality of antennas is connected to exactly one of the plurality of analog signal adjusters. The analog signal adjusters are adapted to alter the phase and/or amplitude of signals sent and/or received by the plurality of antennas, generating an antenna characteristic of the antenna array comprising at least a first beamforming beam or a first plane wave and a second beamforming beam or a second plane wave.

Abstract: An antenna array has plurality of active antennas and passive antennas, wherein the passive antennas being arranged such that the radiation patterns of the active antennas adjacent to the passive antennas match the radiation pattern of the active antennas adjacent only to other active antennas. Further, a calibration system and a method for calibrating an antenna array are shown.

Abstract: A system for phase calibration of an antenna array comprises at least two antenna elements. The system furthermore comprises a device under test comprising the antenna array, a plane wave converter, and a phase measuring unit. Whereas the device under test is configured to transmit or receive a test signal with spatially dependent phase, the plane wave converter is configured to convert the test signal with spatially dependent phase into a signal with constant phase. In addition to this, the device under test or the phase measuring unit is configured to derive calibration values for the phase calibration of the antenna array from the signal with constant phase.

Abstract: A calibration system for calibrating a radio frequency, RF, device comprising a plurality of signal paths, each signal path comprising at least an amplifier and an antenna element, comprises a measurement system for driving the signal paths with a predetermined test signal and measuring an output of the signal paths in response to the test signal, a determination module for determining a first signal path, of which the antenna element provides the lowest output of all antenna elements, and a correction factor calculator for calculating based on output of the first signal path a correction factor for the further signal paths such that with the applied correction factor the output of all signal paths is equal within a predetermined acceptance interval.

Abstract: A calibration system for calibrating a radio frequency, RF, device comprising a plurality of signal paths, each signal path comprising at least an amplifier and an antenna element, comprises a signal generator for driving the signal paths with a predetermined test signal, at least two probes for measuring the output of the signal paths in reaction to the test signal, and a correction factor calculator for calculating respective correction factors based on differences in at least one characteristic of the measured outputs of the signal paths.