Abstract: A measurement system is described, comprising a signal processing equipment, an antenna unit, a device under test, and a resonant cavity surrounding the antenna unit and the device under test. The signal processing equipment is at least one of a signal generation equipment and a signal measurement equipment. The resonant cavity has a resonance for a frequency corresponding to at least one of the frequency used for testing the device under test and its multiples. The device under test is located within the resonant cavity such that a standing wave is established inside the resonant cavity during testing the device under test. The standing wave has an electric field distribution with maxima and minima. The antenna unit is located within the resonant cavity such that the antenna unit is assigned to a maximum of the electric field. Further, a method for testing a device under test is described.

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 resonant cavity for wireless communication measurements with respect to a device under test is provided. In this context, the resonant cavity is hollow such that the device under test is held inside the resonant cavity, preferably without directly touching the walls. Furthermore, the internal dimension of the resonant cavity is of a size such that higher order modes are generated. In addition to this, the resonant cavity comprises at least one stepped cavity located on an outer portion of the resonant cavity holding the device under test. Further additionally, each of the at least one stepped cavity is resonant at a different frequency band.

Abstract: A measurement system for multiple antenna measurements is provided. The measurement system comprises a device under test, at least two measurement antennas, and an anechoic chamber. In this context, the at least two measurement antennas are arranged on at least one wall of the anechoic chamber.

Abstract: The invention relates to an over-the-air (OTA) test system for measuring a performance of a device under test (DUT). The test system comprises an over-the-air (OTA) measurement chamber provided with at least one feedthrough for at least a first air hose and a second air hose. The test system further includes a thermally isolated hollow body inside the OTA measurement chamber, in which the DUT is positioned having at least two openings for connecting a first end of each of the first and the second air hose, and at least one sensor having a connection wire, located within the thermally isolated hollow body. Advantageously, the sensor connection wire is fed through one of the two openings into the thermally isolated hollow body.

Abstract: An integrated device comprises a horn antenna with an antenna waveguide feed, a waveguide transition element comprising a first end connected to the antenna waveguide feed and second end, and an orthomode transducer comprising a common waveguide connected to the second end of the waveguide transition element and at least two separate waveguides. The orthomode transducer is adapted to couple at least two orthogonal linear polarized fields into the common waveguide of the orthomode transducer with the aid of the at least two separate waveguides of the orthomode transducer and/or vice versa. The horn antenna is preferably adapted to support at least two waveguide modes corresponding to the at least two orthogonal linear polarized fields. The integrated device is preferably manufactured in at least two separate blocks such that each part of the at least two piece assembly is constructed as external protrusions and/or holes and/or partial holes.

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: 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 measurement system for measurements of a device under test (DUT) is provided. The measurement system includes a first test antenna configured to send radio frequency (RF) radiation to the DUT and to receive RF radiation sent by the DUT. The system further includes a positioning device, including at least one motor, configured to move the DUT about at least one axis of rotation. The system further includes a geometrical fixture configured to absorb RF radiation and to de-couple or shield the DUT from unintended or spurious RF radiation of one or more of the at least one motor and the first test antenna.

Abstract: A measurement system for measurements of a device under test (DUT) is provided. The measurement system includes a first test antenna configured to send radio frequency (RF) radiation to the DUT and to receive RF radiation sent by the DUT. The system further includes a positioning device, including at least one motor, configured to move the DUT about at least one axis of rotation. The system further includes a geometrical fixture configured to absorb RF radiation and to de-couple or shield the DUT from unintended or spurious RF radiation of one or more of the at least one motor and the first test antenna.

Abstract: An over-the-air measurement chamber is provided for performing measurements with respect to a device under test. The over-the-air measurement chamber includes a thermally isolated space inside the over-the-air measurement chamber, a positioner for positioning the device under test, and a first gas guiding means for intake of a gas and a second gas guiding means for outtake of the gas. The positioner comprises an inner portion and an outer rotational unit. The first and second gas guiding means are fed into the inner portion of the positioner through a hollow rotational axis of the outer rotational unit.

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 radio frequency channel emulator system is provided. Said system comprises a box with at least one measurement antenna arranged at an input, a device under test, an interchangeable lid or wall with a basic arrangement of resistive and/or conductive materials, and an output being connectable to signal measurement equipment.

Abstract: This application relates to a test chamber for testing a device under test (DUT), the test chamber comprising: a plurality of chamber walls defining an interior of the test chamber which are configured to provide an anechoic and shielded test chamber, an antenna arrangement which is arranged in the form of a plane-wave synthesizing array and which is configured to emit plane-waves into the interior of the test chamber, a receiving area for receiving the DUT, wherein in a test mode the receiving area forms a region of measurement of the DUT, wherein the receiving area is formed by a portion of a first wall of the test chamber and wherein the receiving area is configured such that during test mode heat from the DUT is transferred to the outside of the test chamber. The application further relates to a test system comprising such a test chamber.

Abstract: The present invention relates to a measurement of radio-frequency signals by a measurement arrangement comprising a radio-frequency lens for mapping a vertex of a reflector to a virtual vertex. Accordingly, measurement of radio-frequency signals may be performed either at the vertex of the reflector or the virtual vertex generated by means of the radio-frequency lens.

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 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: Measurement arrangement and measurement method for measuring spurious emissions of a wireless device. The measurement arrangement comprises at least two antennas, wherein a first antenna is arranged at proximity of the wireless device. In a first step, frequencies relating to spurious emissions are determined by measuring wireless signals received by the first antenna. In a second step, the spurious emissions are measured by the second device.

Abstract: A measurement system is described, comprising a signal processing equipment, an antenna unit, a device under test, and a resonant cavity surrounding the antenna unit and the device under test. The signal processing equipment is at least one of a signal generation equipment and a signal measurement equipment. The resonant cavity has a resonance for a frequency corresponding to at least one of the frequency used for testing the device under test and its multiples. The device under test is located within the resonant cavity such that a standing wave is established inside the resonant cavity during testing the device under test. The standing wave has an electric field distribution with maxima and minima. The antenna unit is located within the resonant cavity such that the antenna unit is assigned to a maximum of the electric field. Further, a method for testing a device under test is described.

Abstract: A measurement system for testing a device under test is described, with at least two antennas, at least two reflectors, a signal generation and/or analysis equipment and a test location. Each of the antennas is assigned to a corresponding reflector. Each of the antennas is configured to transmit/receive an electromagnetic signal so that a beam path is provided between the respective antenna and the test location. The electromagnetic signal is reflected by the respective reflector so that the electromagnetic signal corresponds to a planar wave. The beam paths have different angular orientations that are adjustable. At least one antenna and the corresponding reflector are coupled with each other so that an integrated beam path adjustment unit is established including at least one antenna and the corresponding reflector. Further, a testing method is described.