Rohde and Schwarz Gmbh & Co. Kg

Rhode & Schwarz Gmbh & Co. Kg

Vincent Abadie

Corbett Rowell

Benoit Derat

Adam Tankielun

Heinz Mellein

Niels Petrovic

Bledar Karajani

Hendrik Bartko

Daniel Markert

Adrian Cardalda-Garcia

Johannes Koebele

Edwin Menzel

Juan-Angel Anton

Ramez Khoury

Jens Wappler

Thorsten Hertel

Moritz Harteneck

Sebastian Schmitz

Jose Fortes

Axel Meier

Jochen Oster

Werner Kehlenbach

Pascal Wolff

Ralf Zoll

Benjamin Haehlke

Johannes Köbele

The present disclosure provides a method of determining a setting for performing a spurious emission measurement of a device under test. A preliminary total radiated power (TRP) measurement of a wanted signal of the device under test is performed along a three-dimensional measurement grid that includes several measurement points. Equivalent isotropic radiated power (EIRP) values are determined for the measurement points during the preliminary total radiated power measurement. The equivalent isotropic radiated power values gathered are evaluated with respect to a threshold value, thereby determining at least one subset of the equivalent isotropic radiated power values. In addition, a method of performing spurious emission measurements is described.

Method of determining a setting for performing a spurious emission measurement and method of performing a spurious emission measurement

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.

Measurement system and method for testing a device under test

The present disclosure relates to a measurement system for testing a device under test over-the-air. The measurement system comprises a signal generation and/or analysis equipment, several antennas, several reflectors and a test location for the device under test. The antennas are connected with the signal generation and/or analysis equipment in a signal-transmitting manner Each of the antennas is configured to transmit and/or 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 one of the reflectors so that the electromagnetic signal corresponds to a planar wave, thereby providing indirect far field conditions for testing. A first reflector of the several reflectors is orientated at a first azimuth angle and at a first elevation angle with respect to a center of the test location. A second reflector of the several reflectors is orientated at a second azimuth angle and at a second elevation angle with respect to the center of the test location. The second elevation angle is different to the first elevation angle. The second azimuth angle is different to the first azimuth angle. Further, a method of performing an over-the-air test of a device under test is described.

Measurement system and method of performing an over-the-air test

An over-the-air measurement system for investigating a device under test with respect to its temperature behavior is provided. The over-the air measurement system includes a positioning unit attached to the device under test for positioning the device under test, at least one antenna, and a temperature generating unit for generating heated or cooled air. The over-the-air measurement system includes a piping system comprising at least one pipe connected to the temperature generating unit for passing the heated or cooled air generated by the temperature generating unit into at least one opening of an enveloping material surrounding the device under test or for siphoning the heated or cooled air.

Measurement system and method for investigating a DUT with respect to its temperature behavior

A method of measuring a total radiated power of a device under test by a test system with a base station simulator, a measurement antenna assigned to the base station simulator and a control and/or measurement equipment is described. The method includes: establishing a radio resource control connection between the device under test and the base station simulator via the measurement antenna; activating an uplink-beam lock function at the device under test; and performing a total radiated power measurement by the control and/or measurement equipment while continuously sending a downlink signal from the base station simulator via the measurement antenna to the device under test. A test system is further described.

Method of measuring a total radiated power of a device under test as well as test system

A test equipment is provided for over the air tests on a device under test, in particular a user equipment, having a shielded space, at least one signal antenna for transmitting and receiving cellular signals arranged in the shielded space, and a plurality of noise antennas arranged in the shielded space linked in an array configured to create Additive White Gaussian Noise. The noise antennas are equally distributed in three dimensions within the shielded space. Further, a method for testing a device under test is shown.

Test equipment for over the air tests as well as method for testing a device under test

A method for performing a radiated two-stage method measurement on a device under test having a predefined number of antennas, comprising: placing the device under test on a positioner; establishing communication with the device under test using at least one link antenna; and measuring the antenna pattern of the device under test using a plurality of measurement antennas, wherein the plurality of measurement antennas comprise a number of measurement antennas being larger than the number of antennas of the device under test. Further, a measurement setup is shown.

Method for performing a radiated two-stage method measurement as well as measurement setup

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.

Measurement arrangement and measurement method

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.

Measurement system and method for performing test measurements

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.

Measurement method and system for increasing the effective size of a quiet zone

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.

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.

Resonant cavity for wireless communication measurement and corresponding method

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. Test of the device under test is performed employing the second antenna, wherein the signals are rescaled based.

Test arrangement and test method

A test system for measuring beam characteristics of a device under test (DUT) is provided. The system comprises a DUT, a measurement antenna configured to receive electro-magnetic radiation emitted by the DUT, a link antenna configured to provide a test communication link to the DUT, and a control and analyzing unit configured to control a beam steering of the device under test and to analyze signals from the device under test received by the measurement antenna. The test communication data transmitted to the device under test comprises beam steering control data in order to control the beam steering of the DUT.

Test system and method for measuring beam characteristics

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.

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Hohenschaeftlarn, Germany

Vincent Abadie