Abstract: A system for parallel measurement of devices under test in an open over the air environment is provided. The system comprises a plurality of alignment structures, each comprising a shaped reflector arranged at a top end of the alignment structure and an antenna arranged at the focal region of the shaped reflector. In this context, the devices under test are arranged at bottom ends of the plurality of alignment structures, opposite to a respective shaped reflector. In addition, the plurality of alignment structures are placed parallel to each other without shielded enclosures.

Abstract: A method for positioning a device under test within a test area is provided. The method comprises the steps of determining shape and/or quality of a quiet zone with respect to the device under test, and using an augmented reality technique in order to optimize the positioning of the device under test in the quiet zone.

Abstract: A measurement system for testing a device under test is described that comprises at least one signal unit for processing a signal, at least two measurement antennas, at least two reflectors, a shielded space, and a testing position for the device under test. Each measurement antenna is orientated with respect to the testing position such that the testing position is located in at least one of a side lobe area and a back lobe area of the measurement antennas. The reflectors are located such that each reflector generates and/or collimates a planar wave at different angles with respect to the testing position. Further, a method for performing test measurements is described.

Abstract: A measurement method for increasing the effective size of a quiet zone is provided. The measurement method comprises the step of in the case that an amplitude and/or a phase distribution of the quiet zone is known, determining a set of correction factors on the basis of said amplitude and/or phase distribution of the quiet zone. Additionally or alternatively in the case that the amplitude and/or phase distribution of the quiet zone and an antenna radiating aperture location on a device under test are known, the device under test is centered in the middle of the quiet zone and the device under test is moved radially in at least one axis.

Abstract: A method and a system for detecting faulty devices are provided. The method comprises the steps of gathering test data in near field with respect to a device under test, extrapolating the test data to far field conditions with the aid of at least one machine learning technique, and evaluating a far field performance of the device under test on the basis of the far field conditions.

Abstract: A measurement system for investigating the receive behavior of a device under test is provided. The measurement system comprises a test antenna, a test equipment connected to the test antenna, and a test position with respect to the device under test. In this context, the test equipment is configured to derive from geometrical information and radiation pattern data of the test antenna position based signal properties for transmitting via the test antenna.

Abstract: A measurement system for investigating the receive behavior of a device under test is provided. The measurement system comprises a test antenna, a test equipment connected to the test antenna, and a test position with respect to the device under test. In this context, the test equipment is configured to derive from geometrical information and radiation pattern data of the test antenna position based signal properties for transmitting via the test antenna.

Abstract: A system for characterizing a quiet zone of an over-the-air testing space includes at least one measurement antenna and at least one scattering member. The measurement antenna is configured to at least transmit electromagnetic signals. The scattering member includes predefined scattering properties. The scattering member is enabled to scatter the electromagnetic signals so as to generate scattered electromagnetic signals that are transmitted in a defined manner Further, a method of characterizing a quiet zone of an over-the-air testing space is described.

Abstract: A method for near-field reconstruction in indirect far-field systems is provided. The method comprises the steps of measuring a reference antenna for orthogonal field components in a direct spherical near-field system at a well geometrically defined distance (R0), measuring the reference antenna for orthogonal field components in an indirect far-field system and optimizing the orthogonal field components in the indirect far-field system with respect to the orthogonal field components in the direct spherical near-field system.

Abstract: A method for correcting a radiation pattern is described by using a system having a device under test with at least one antenna and a measurement antenna. The device under test is located in a placement zone. A radiation pattern of the device under test is measured. A corrected measurement antenna pattern is determined to compensate for an offset of the at least one antenna of the device under test with respect to a coordinate center of the placement zone towards which the measurement antenna is orientated. The corrected measurement antenna pattern is applied on the measured radiation pattern of the device under test to obtain a corrected radiation pattern of the device under test. Furthermore, a system and a computer program for correcting a radiation pattern are described.

Abstract: A method of performing a test assigned to a quiet zone of a test chamber by using a test system is described. The test system comprises an antenna array with a plurality of antennas. The test system includes a measurement antenna adapted to establish a link to each one of the antennas of the antenna array. At least one measurement is performed over a coordinate surface. The antennas of the antenna array are fed with signals simultaneously, the signals having at least one of different frequencies and different orthogonal code-modulations. Alternatively or additionally, the antennas of the antenna array are switched electronically such that, in one spatial acquisition of the field over the coordinate surface, the field of each antenna of the antenna array is measured sequentially. Moreover, a test system is described.

Abstract: A method of performing a test assigned to a quiet zone of a test chamber by using a test system is described. The test system comprises an antenna array with a plurality of antennas. The test system includes a measurement antenna adapted to establish a link to each one of the antennas of the antenna array. At least one measurement is performed over a coordinate surface. The antennas of the antenna array are fed with signals simultaneously, the signals having at least one of different frequencies and different orthogonal code-modulations. Alternatively or additionally, the antennas of the antenna array are switched electronically such that, in one spatial acquisition of the field over the coordinate surface, the field of each antenna of the antenna array is measured sequentially. Moreover, a test system is described.

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: A method for positioning a device under test within a test area is provided. The method comprises the steps of determining shape and/or quality of a quiet zone with respect to the device under test, and using an augmented reality technique in order to optimize the positioning of the device under test in the quiet zone.

Abstract: A system for near-field measurement of a device under test in a far-field environment is provided. The system comprises a communication unit adapted to establish a far-field connection with the device under test. The system further comprises a measuring unit adapted to measure a magnitude and a phase of at least two field components. Moreover, the system comprises a processing unit adapted to perform far-field to near-field and/or near-field to near-field transformation of the field components in order to calculate field components at a specific surface in the near-field of the device under test.

Abstract: An antenna array for at least one of generating and receiving a plane wave in a certain distance is described, the antenna array comprising a plurality of antennas which are movable with respect to each other. The antenna array is configured such that plane waves are at least one of generated and received in the near field of the antenna array. Further, a test system and a method for testing a device under test are described.

Abstract: This application relates to an anechoic test chamber for testing antennas of a device under test (DUT), the test chamber comprising: a test area having a test surface for receiving the DUT, wherein in a test mode the test surface forms a region of measurement of the DUT and wherein the DUT comprises at least one antenna array having a plurality of multi-input multi-output (MIMO) antennas, at least one reflector compact antenna test range (CATR) comprising a first measurement antenna and one shaped reflector, wherein the reflector is used to generate a first quiet zone, at least one second measurement antenna, wherein the second measurement antenna is arranged inside the test chamber such to generate a second quiet zone at test surface, an input/output terminal for connecting the test chamber to a test equipment, wherein the input/output terminal is connected to the first and second antennas.

Abstract: A method and a system for detecting faulty devices are provided. The method comprises the steps of gathering test data in near field with respect to a device under test, extrapolating the test data to far field conditions with the aid of at least one machine learning technique, and evaluating a far field performance of the device under test on the basis of the far field conditions.

Abstract: A method for correcting a radiation pattern is described by using a system having a device under test with at least one antenna and a measurement antenna. The device under test is located in a placement zone. A radiation pattern of the device under test is measured. A corrected measurement antenna pattern is determined to compensate for an offset of the at least one antenna of the device under test with respect to a coordinate center of the placement zone towards which the measurement antenna is orientated. The corrected measurement antenna pattern is applied on the measured radiation pattern of the device under test to obtain a corrected radiation pattern of the device under test. Furthermore, a system and a computer program for correcting a radiation pattern are 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 power detector diode. Each measuring antenna is adapted to determine at least two power values during the movement along the path of movement.