A method of performing a measurement of a device under test by using an antenna array. The method includes: providing an antenna array that includes several antenna elements; providing a device under test configured to communicate over-the-air; locating the device under test at a first test location, thereby establishing a first relative distance between the device under test and the antenna array; performing a first measurement over-the-air when the first relative distance is provided between the device under test and the antenna array, thereby obtaining first measurement results; moving the antenna array and/or the device under test, thereby establishing a second relative distance between the device under test and the antenna array; and performing a second measurement over-the-air when the second relative distance is provided between the device under test and the antenna array, thereby obtaining second measurement results, wherein a quiet zone is established, in which the device under test is located, and wherein the size of the quiet zone is derived from a combination of at least two transfer functions associated with the first measurement results and the second measurement results. Further, a measurement system is described.

A testing system and method for testing integrated circuits with radio frequency (RF) antennas is disclosed. The system includes an alignment plate for receiving a device under test (DUT) having an RF transmitting antenna, an enclosure surrounding but separated from the transmitting antenna, a receiving antenna in a telescopic enclosure, and a conversion circuit connected to the receiving antenna. The conversion circuit is configured to convert an RF output from the DUT to a direct current (DC) voltage. The DC voltage is used as a proxy for the RF output to test the DUT. When testing chips with RF ports, the chip or ports are surrounded by the enclosure which is non-radio reflective and includes antennas for receiving RF outputs disbursed around the enclosure, or a single antenna. If multiple receiving antennas are used, sequential testing can also detect directional transmission patterns to confirm that the direction is correctly calibrated.

An over-the-air measurement system for performing over-the-air measurements on a device under test is described. The measurement system comprises a measurement device having several measurement antennas, several waveguides, wherein at least one waveguide is assigned to each measurement antenna, several waveguide-to-cable adapters, and a positioning unit assigned to the measurement antennas. The number of the waveguide-to-cable adapters is at least identical to the number of the measurement antennas. The positioning unit is configured to move the measurement antennas with respect to the waveguide-to-cable adapters.

A multi-panel base station test system includes a base station radio unit configured with a plurality of antenna panels positioned at a first end of a test chamber of the multi-panel base station test system. The multi-panel base station test system includes a plurality of test antennas positioned at a second end of the test chamber opposing the first end. The multi-panel base station test system includes a microwave lens positioned between the plurality of antenna panels and the plurality of test antennas in the test chamber. The microwave lens is configured to focus respective beams transmitted from each of the plurality of antenna panels toward respective focal points associated with each of the plurality of test antennas based on steering of the plurality of antenna panels.

An electromagnetic stirrer including: a shaft body extending in a first direction; and a plurality of stirring blades disposed on the shaft body, in which the plurality of stirring blades include a first stirring blade and a second stirring blade, the first stirring blade and the second stirring blade are aligned from a reference position of the shaft body in the first direction in order of the first stirring blade and the second stirring blade, a shape of the first stirring blade and a shape of the second stirring blade are similar to each other, and a size of the first stirring blade is different from a size of the second stirring blade.

The invention discloses a hybrid compact, near-field-to-far-field and direct-far-field test system in an anechoic chamber. It comprises a curved reflector with its primary feed antenna set situated on a lateral side and pointing towards it, a secondary feed antenna set pierced to the reflector or in front of it, and one or several sets of antennas or devices under test (AUT/DUT), and their 3D turntable tower placed at a quiet zone, for which roll, elevation and azimuth can change. In a receive process, the primary antenna set transmits several signals towards the reflector, which reflects these signals towards the quiet zone in the form of planar wavefronts. The secondary antenna set also transmits several signals, but directly towards the quiet zone in spherical wavefronts. The AUT/DUT receives all these signals simultaneously. Through reciprocity, a similar measurement process for transmission can be performed.

An over-the-air (OTA) measurement system for testing a device under test, with a plurality of feed antennas, a test location for the device under test, and a reflector array with a main reflector and a sub-reflector. The plurality of feed antennas face the sub-reflector. The reflector array is located such that a signal path is established between the plurality of feed antennas and the test location via the sub-reflector and the main reflector. The sub-reflector has at least one focal point. The plurality of feed antennas include a first feed antenna and at least one second feed antenna. The first feed antenna is associated with the focal point of the sub-reflector. The at least one second feed antenna is located offset from the focal point of the sub-reflector. Further, a method of testing a device under test over-the-air is described.

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.

A testing device for testing an antenna is provided. The testing device includes a housing, an antenna module for holding the antenna and disposed under the housing, and a receiving module disposed on the housing. The antenna module includes a base and a flexible film disposed on the base. The receiving module includes a substrate, a coupling radiation element disposed on the substrate and a support disposed on the substrate and having an opening. The antenna is partially exposed from the opening.

A method for measuring performance of at least one DUT in a reverberation chamber over a frequency band, the method including, iteratively: generating a fading scenario by the reverberation chamber; identifying at least one measurement sub-band included in the frequency band, wherein the at least one measurement sub-band complies with a gain flatness criterion; measuring performance of the at least one DUT in the at least one identified measurement sub-band, thereby generating at least one performance measurement result; accumulating the at least one performance measurement result; and determining measurement coverage and terminating the performance measurement in case the measurement coverage meets a coverage criterion.