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: A measurement system comprising a device under test, at least a first antenna and a second antenna, a reflector device, a shielded space and a signal analysis module is disclosed. The first antenna is configured to at least one of generate electromagnetic waves directed to the reflector device and receive electromagnetic waves reflected by the reflector device. The reflector device is configured to reflect electromagnetic waves between the first antenna and the device under test. The second antenna is positioned in a near-field area of the device under test. At least the second antenna is connected to the signal analysis module, and the device under test, the first antenna, the second antenna and the reflector device are assigned to the shielded space. Moreover, a method for operating a measurement system is disclosed.

Abstract: The present invention provides a test arrangement and test method for testing a wireless device under test. A first antenna may be arranged at a first distance from the device under test, and a second antenna may be arranged at a second distance from the device under test. In particular, the second antenna may be arranged closer to the device under test and the first antenna. Physical parameters characterizing the transmission properties between the individual antenna and the device under test are determined for the first and the second antenna.

Abstract: A measurement system is provided. The measurement system comprises a device under test comprising at least one antenna, at least one measurement antenna, and a signal analysis unit. In this context, the location of the at least one antenna of the device under test is unknown with respect to the device under test, whereas the signal analysis unit is configured to perform at least one near-field measurement with respect to the device under test with the aid of the at least one measurement antenna. In addition to this, the signal analysis unit is further configured to locate the at least one antenna of the device under test on the basis of the at least one near-field measurement in order to obtain position data of the at least one antenna of the device under test.

Abstract: Measurement arrangement and method for measuring an electromagnetic field. It is for this purpose that a measurement probe is arranged on a mechanical probe positioning structure and moved along a number of one or more circular tracks. In this way, the measurement probe can be subsequently located at multiple different spatial positions and the corresponding electromagnetic signal can be measured. Accordingly, properties of an electromagnetic field can be determined by taking into account the measured electromagnetic signal with respect to the related spatial position.

Abstract: A measurement system comprising a device under test, at least two feed antennas, a shielded space, and at least one of a signal generation unit and a signal analysis unit is disclosed. The device under test comprises at least two sub-arrays, each sub-array being configured to generate an electromagnetic beam. The feed antennas are each allocated to a sub-array and are each configured to at least one of generate an electromagnetic beam with defined electromagnetic properties in a certain area assigned to the device under test and receive an electromagnetic beam from the respective sub-array. The feed antennas are connected to the at least one of the signal generation unit and the signal analysis unit, and the device under test and the feed antennas are assigned to the shielded space. Moreover, a method for operating a measurement system is provided.

Abstract: An over-the-air measurement system for testing the over-the-air characteristics of a device under test is described, comprising several antenna units for receiving and transmitting radio frequency signals, several remote radio units that convert radio frequency signals into digital signals or vice versa, and a baseband unit for generating and analyzing baseband signals. The baseband unit is connected to the remote radio units, the baseband unit having at least one physical layer control unit that is configured to adapt the over-the-air measurement system with regard to the physical layer. The several antenna units are connected to the remote radio units. Further, a method for testing the over-the-air characteristics of a device under test is described.

Abstract: A test system for testing a wireless device under test in a test chamber. The device under test may be located on a bottom of the test chamber, and a measurement antenna may be mounted on a bottom or a side wall of the test chamber. Further, a reflector may be mounted on a ceiling of the test chamber. Accordingly, a signal path for testing the device under test may be established by reflecting the wireless signals between the device under test and the measurement antenna by the reflector.

Abstract: An over-the-air test system for measuring the radiation performance as a function of temperature of a device under test is described, wherein the device under test has at least one antenna unit and at least one radio frequency circuit. The over-the-air test system comprises a measurement antenna unit, a measurement unit for at least one of signal generation and signal analysis, an enclosure that provides an internal space for accommodating the device under test for testing purposes in a sealed manner, and an atmosphere conditioning system that is configured to adapt the atmosphere within the internal space. The enclosure comprises at least one sealable opening via which the internal space is connectable with the atmosphere conditioning system to adapt the atmosphere within the internal space for the testing. Further, a method for measuring the over-the-air performance of a device under test is described.

Abstract: A reflector for deflecting electromagnetic waves is provided. Said reflector comprises a resistive material along its edges in a specific pattern, wherein the resistive material has a resistance per square meter being higher than the resistance per square meter of the material of the reflector in order to attenuate and/or absorb electromagnetic energy of the electromagnetic waves.

Abstract: A measurement system is provided. The measurement system comprises a device under test, at least two measurement antennas, and a reflector. In this context, the reflector comprises at least two separate curved surfaces in the same physical entity in order to generate separate plane waves corresponding to the at least two measurement antennas. The reflector is configured in such a manner that the separate plane waves converge in a quiet-zone comprising the device under test.

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: Test arrangement and method for wirelessly testing a device under test. An in-band test signal and a further interference signal are emitted to the device under test by a test arrangement comprising a single antenna. For this purpose, a linear polarized in-band test signal and a linear polarized interference signal are generated. The in-band test signal and the interference signal are combined by a transducer to a circular polarized signal and the circular polarized signal comprising the in-band test signal and interference signal is used for testing the device under test.

Abstract: A measurement system is provided. The measurement system comprises a device under test comprising at least one antenna, at least one measurement antenna, and a signal analysis unit. In this context, the location of the at least one antenna of the device under test is unknown with respect to the device under test, whereas the signal analysis unit is configured to perform at least one near-field measurement with respect to the device under test with the aid of the at least one measurement antenna. In addition to this, the signal analysis unit is further configured to locate the at least one antenna of the device under test on the basis of the at least one near-field measurement in order to obtain position data of the at least one antenna of the device under test.

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 measurement system is provided. The measurement system comprises a device under test comprising at least two signal paths, at least two measurement antennas being spatially separated in the near-field of the device under test, and a signal analysis unit. Whereas each of the at least two signal paths of the device under test comprises an antenna and a power amplifier, noise of the power amplifiers of the at least two signal paths of the device under test is not phase-coherent. In this context, the signal analysis unit is configured to perform at least two time-coherent measurements with the aid of the at least two measurement antennas with respect to the device under test in near-field. In addition to this, the signal analysis unit is further configured to calculate at least one signal characteristic, especially error vector magnitude and/or signal-to-noise ratio, in far-field on the basis of the at least two time-coherent measurements in the near-field.

Abstract: An antenna measurement system is provided. The antenna measurement system comprises an antenna and a device under test. the antenna comprises a light emitting unit which is integrated in the antenna. Advantageously, the antenna can be positioned with respect to the device under test in an efficient and cost-saving manner.

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 measuring system for over the air measurements on a device under test comprises an antenna module with at least one measuring antenna, a positioner, adapted to change a relative position of the device under test and the antenna module, resulting in a relative path of movement of the antenna module with regard to the device under test. Each measuring antenna comprises an integrated io power detector diode. Each measuring antenna is adapted to determine at least two power values during the movement along the path of movement.

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.