Abstract: A portable antenna measurement system is disclosed. The antenna measurement system can include a robotic arm with an antenna probe on one end, a laser tracker, a vector network analyzer, and a computing device. The computing device can receive input from the laser tracker identifying the position of an antenna and other objects in the environment and generate a scan surface around an antenna under test. The computing device can instruct the robotic arm to move the antenna probe into positions in the scan surface to acquire radiation measurements. If portions of the scan surface are unreachable by the robotic arm, the robotic arm can be repositioned, and measurements can be resumed. The network vector analyzer can acquire and save measurements. An antenna pattern can then be generated based on point measurements and output for display.

Abstract: A calibration and group testing system for RF units and a method therefor are provided. The system includes a control device, a signal source device, a test platform, and a measurement device. M times of measurements are performed between the test platform and the measurement device. For each measurement, a microwave signal source is converted into random microwave signals with N random amplitudes and phases, and the RF units are respectively stimulated to output the random microwave signals superimposed on a measured path to form a measurement signal. The measurement device receives measurement signals of the M times of measurements and converts them into M pieces of measurement information, respectively. The control device solves the measurement information and performs iterative and convergent calculations on all solution results to obtain calibration information of the RF units in a specific state, thereby correcting the RF units according to the calibration information.

Abstract: A near-field testing apparatus for testing a device under test having an array of transmitter antennas is provided. The near-field testing apparatus includes a frame structure and a receiver circuit. The frame structure defines an array of grid sections, and is arranged for receiving the array of transmitter antennas at a first side of the array of grid sections. A periphery of each grid section at the first side surrounds a plurality of transmitter antennas in the array of transmitter antennas. The grid section is arranged to guide respective electromagnetic signals emitted by the transmitter antennas from the first side to a second side of the array of grid sections. The receiver circuit, disposed at the second side of the array of grid sections, is arranged to couple the electromagnetic signals out of the grid section.

Abstract: Provided are a phase difference measurement method and system for an antenna array, and a phase compensation method and system for an antenna array. The antenna array includes at least two array elements. The phase difference measurement method includes: measurement is performed to obtain a three-dimensional space far-field phase data set of each array element in an antenna array; a three-dimensional solid angle space is determined, and three-dimensional space far-field phase data of each array element is acquired from the three-dimensional space far-field phase data set, wherein the three-dimensional space far-field phase data of each array element corresponds to the three-dimensional solid angle space, of each array element in the antenna array; and with a three-dimensional space far-field phase data of a first array element in the antenna array as a reference, a phase difference between other array element and the first array element is obtained.

Abstract: A testing base includes a housing, a carrier, a wave absorber, and a filler. The housing has an inner surface. The carrier is disposed on the housing. The carrier includes an upper surface, a lower surface, and a groove recessed in the upper surface. The groove is adapted for accommodating a component to be tested. The lower surface and the inner surface of the housing define a cavity body together. The wave absorber is disposed on the inner surface of the housing. The filler is filled in the cavity body and contacts the wave absorber and the carrier. A relative permittivity of the filler is less than or equal to 2.

Abstract: 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.

Abstract: A method for evaluating an apparatus having at least one antenna array, the apparatus configured for forming a plurality of communication beam patterns using the antenna array, includes positioning of the apparatus in a measurement environment or moving/switching the probe/link antenna(s) of the measurement environment around the apparatus adapted to measure beam patterns and controlling the apparatus so as to form a predefined beam pattern of the plurality of communication beam patterns. The method includes measuring the predefined beam pattern using the measurement environment and/or the apparatus.

Abstract: A semiconductor device is tested by disposing an antenna-in-package (AiP) module under a test antenna. A first signal is transmitted with a first antenna of the AiP module. The test antenna is moved to a power output peak of the first signal. A second signal is transmitted with a second antenna of the AiP module. The test antenna is moved along a first directional axis from the power output peak of the first signal to a power output peak of the second signal while a second directional axis of the test antenna is held static. The first antenna of the AiP module is tested while the test antenna is at the power output peak of the first signal. The second antenna of the AiP module is tested while the test antenna is at the power output peak of the second signal.

Abstract: A driver assistance system for a vehicle having a decision engine and a plurality of active object-detection sensors including two radar sensors mounted at opposed locations on the vehicle relative to a longitudinal centerline of the vehicle. A field of view of each radar sensor is directed away from the centerline and forward of the vehicle and overlaps with the field of view of the other radar sensor in a region of overlap crossing the centerline forward of the vehicle. The decision engine receives signals from the sensors and determines the presence of an object in the regions of overlap on the basis of signals from only each of the two radar sensors among the active object-detection sensors of the system. The decision engine is thus able to command vehicle functions such as braking or acceleration on the basis of the determination.

Abstract: A cargo handling system that utilizes a distributed antenna system for a cargo bay or compartment is disclosed. A cargo deck within the cargo bay may incorporate a plurality of power drive units. A mobile cargo controller may wirelessly communicate with the distributed antenna system to control movement of a ULD into/out of/within the cargo bay. A base station may be operatively interconnected with both the distributed antenna system and the plurality of power drive units (e.g., directly or indirectly via a control system, such as a control panel).

Abstract: A method for calibrating a phased array including an antenna array comprising a plurality of antenna elements, comprising the steps: measuring with a probe a first antenna element pattern of a first antenna element of the plurality of antenna elements; performing a spherical near-field to far-field transformation of the first antenna element pattern; transforming the far-field first antenna element pattern to a plane-wave spectrum; back transforming the plane-wave far-field first antenna element pattern to a reference point within the near-field of the antenna array; normalizing the first antenna element pattern according to, at least, the value at the phase center of the plane-wave near-field first antenna element pattern; and calibrating the first antenna element based, at least in the part, on the normalized first antenna element pattern.

Abstract: An apparatus includes a first splitter configured to feed a first signal onto a first transmission channel and a second transmission channel, where the first splitter is located in a symmetrical position between the first transmission channel and the second transmission channel, and a vector detection component configured to, when the first splitter feeds the first signal, detect a first signal vector based on a first feedback signal from the first transmission channel, and detect a second signal vector based on a second feedback signal from the second transmission channel.

Abstract: An anechoic chamber and a construction method thereof are provided, the anechoic chamber includes a top surface, being a polygon; trapezoid surfaces, corresponding to edges of top surface, upper edge lengths of trapezoid surface being equal to edge lengths of top surface, trapezoid surfaces being connected to edges of top surface through the upper edges, the trapezoid surfaces being sequentially connected along a circumferential direction of top surface, and being at angle to the top surface; rectangular surfaces, corresponding to the trapezoid surfaces, upper edge lengths of rectangular surface being equal to lower edge lengths of trapezoid surface, rectangular surfaces being connected to the trapezoid surfaces through the upper edges, the rectangular surfaces being sequentially connected along a circumferential direction of the lower edges of trapezoid surfaces, and being perpendicular to the top surface; and an absorbing material, disposed on the top surface, the trapezoid surfaces and the rectangular surf

Abstract: A method of determining electromagnetic exposure values for radiative compliance tests a transmitting device with multiple transmitters or antenna. The device transmits a first set of excitation signals that are chosen in advance. These signals are measured for their electromagnetic exposure values. A second set of excitation signals are then transmitted that are adaptively chosen based on result of a previous measurements of the first excitation signals. The second set of signals are also measured. From the measurements of the predetermined and adaptive signals, the electromagnetic exposure values of all possible transmitted signals are inferred.

Abstract: The present disclosure provides a novel antenna. An antenna according to an example of a plurality of embodiments of the present disclosure includes a radiation conductor, a ground conductor, a first feeding line, a second feeding line, and a connecting conductor. The first feeding line is electromagnetically connected to the radiation conductor and configured to excite the radiation conductor in a first direction. The second feeding line is electromagnetically connected to the radiation conductor and configured to excite the radiation conductor in a second direction. The connecting conductor is positioned apart from the center of the radiation conductor. The connecting conductor is spaced apart from the first feeding line by a first distance. The connecting conductor is spaced apart from the second feeding line by a second distance. The first distance is substantially equal to the second distance.

Abstract: A test system for testing a device under test is provided including at least one feed antenna, a shielded chamber, and at least a first reflector and a second reflector. The test system is a compact antenna test range. The first reflector and the second reflector are arranged inside the shielded chamber. The first reflector is configured and arranged such that it redirects outgoing test signals emitted by the at least one feed antenna towards the second reflector and incoming test signals coming from the second reflector towards the at least one feed antenna. The device under test is arranged outside the shielded chamber. The shielded chamber includes at least a first interface associated with the device under test. The first interface and the feed antenna are located at different sides of the shielded chamber, which are perpendicular to each other.

Abstract: A circuit device includes a directional coupler with a first port receiving a radiofrequency signal, a second port outputting a signal in response to signal received by the first port, and a third port outputting a signal in response to a reflection of the signal at the second port. An impedance matching network is connected between the second port and an antenna. The impedance matching network includes fixed inductive and capacitive components and a single variable inductive or capacitive component. A diode coupled to the third port of the coupler generates a voltage at a measurement terminal which is processed in order to select and set the inductance or capacitance value of the variable inductive or capacitive component.

Abstract: A method and a closed-loop antenna impedance tuning (CL-AIT) system are provided. An input reflection coefficient is determined. The input reflection coefficient and a threshold value are compared to determine whether the input reflection coefficient is greater than the threshold value. In response to determining that the input reflection coefficient is greater than the threshold value, an optimal tuner code is determined based on a tuner code search algorithm. The optimal tuner code is applied to configure the CL-AIT system.

Abstract: An apparatus for a mmWave RF scanner system is described that enables multiple modes of operation. The disclosed RF scanner may be configured to perform a variety of independent tasks, including antenna measurement in far-field or near-field mode, active array characterization, radome measurements, and material characterization. To achieve all proposed measurements, a nine-axis RF scanner system is disclosed. For all modes, the system may use a two-port vector network analyzer (100 kHz to 9 GHz) connected to a plurality of frequency extenders that increases the operating range from 75 GHz to 110 GHz. The system may also include a graphical user interface for autonomous operation in each mode.

Abstract: A system for the automated validation of a semi-anechoic chamber (SAC) is disclosed. The system includes a receive assembly and a transmit assembly, each configured to autonomously relocate within the SAC. The system also includes a local client communicatively coupled to the transmit assembly. The local client is configured to send a validation arrangement to the transmit assembly describing a validation location and a distance. The transmit assembly is configured to receive the validation arrangement, move the transmit assembly to the validation location and send an instruction to the receive assembly, the instruction describing the distance. The receive assembly is communicatively coupled to the transmit assembly and configured to receive the instruction and move the receive assembly such that a separation between the transmit and receive assemblies is restored to the distance. Each validation arrangement corresponds to a validation point. A plurality of validation points defines a test volume.

Abstract: The electronic device of the present invention may comprise: a first antenna and a second antenna; a communication circuit; and a processor electrically connected to the first antenna, the second antenna, and the communication circuit. The processor is configured to: control the communication circuit such that a first signal is output to the first antenna; acquire a second signal corresponding to the first signal reflected from the first antenna, and a third signal corresponding to the first signal output through the first antenna and received by the second antenna; identify a reflection coefficient at which the first signal is reflected from the first antenna, and a transmission coefficient at which the first signal is transmitted to the second antenna; and perform a designated function according to a value corresponding to a distance between the electronic device and an external object.

Abstract: System and method for measuring path loss of a conductive radio frequency (RF) signal path used in testing a RF data signal transceiver device under test (DUT) with a RF vector signal transceiver. A path loss measurement may be performed by initially leaving an open connection at the RF signal path end normally connected to the DUT during DUT testing. Sourcing the RF test signal with the RF vector signal transceiver at multiple test frequencies avoids need for additional testing with shorted and loaded connections at the RF signal path end.

Abstract: Various systems, devices, and methods for contactless sleep tracking are presented. Based on data received from a contactless sensor, such as a radar sensor, determine that a user has entered a sleep state. A transition time may be determined at which the user transitions from the sleep state to an awake state. An environmental event, based on data received from an environmental sensor, may be identified as occurring within a time period of the transition time. The user waking may be attributed to the environmental event based on the environmental event occurring within the time period of the transition time. An indication of the attributed environmental event as a cause of the user waking may be output.

Abstract: A quasi-isotropic antenna includes: a feeder; a loop antenna configured to radiate a first radio wave based on a feeding from the feeder; and a dipole antenna adjacent to the loop antenna, and configured to radiate a second radio wave by resonating based on a resonant-coupling with the loop antenna, wherein a radiation pattern of the first radio wave is orthogonal to a radiation pattern of the second radio wave.

Abstract: 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.

Abstract: Techniques are described for detecting whether a phased array antenna is to be calibrated. In an example, a controller communicatively coupled with the phased array antenna measures a characteristic of a probe signal. The probe signal is communicated between an antenna element of the phased array antenna and a probe antenna mounted to the phased array antenna. The probe antenna is over-resonant. The controller further determines a drift of the phased array antenna based at least in part on the characteristic. Based at least in part on the drift, the controller initiates a calibration of the phased array antenna.

Abstract: Embodiments provide a method, apparatus and device of reconstructing non-Kronecker structured channels, applicable to communications. A weight matrix is determined for emulating link characteristics of a reconstructed channel, and includes a weight corresponding to each ray mapped to a probe antenna. In each cluster, rays mapped to each probe antenna have different weights with each other. For each cluster, a time-varying fading channel impulse response of each ray of the cluster mapped to a probe antenna is calculated using the weight matrix. The time-varying fading channel impulse response includes a transition equation for each probe antenna describing mapping of rays of the cluster to the probe antenna. A transition matrix from each probe antenna to receiving antennas of a device under test is determined. A product of the time-varying fading channel impulse response of the cluster multiplied by the transition matrix serves as a channel impulse response of the cluster.

Abstract: Various example embodiments described herein relate to a method for selecting antennas in an RFID reader. In some examples, the method includes determining that at least one external antenna and internal antenna are connected to the RFID reader; selecting the at least one external antenna and internal antenna; and performing a read operation based on the selected at least one external antenna and internal antenna.

Abstract: The present invention performs characteristic tests on a communication device with a compact and simple configuration. A testing device 1 that performs characteristic tests in a near field on a communication antenna 250 of a communication device 240 includes a tray body 220 that supports the communication device in a test space S as an anechoic chamber, and a coupler support frame 520 that supports coupler antennas transmitting and receiving radio waves to/from the communication antenna 250. The coupler support frame can form inner-periphery coupler antenna arrays 300A and 300B each including a plurality of coupler antennas 300 arranged at least in a row along a curve extending along an inner peripheral surface composed of side surface S1 and S2, an upper surface S3, and a lower surface S4, and a rear coupler antenna array 300C including a plurality of coupler antennas 300 arranged at least in a row in an upper-lower direction along a curve extending along a rear surface S5.

Abstract: Devices for testing a DUT having a circuit coupled to an antenna are disclose. The device can include a DUT location, a probe, and a ground area configured to serve as an antenna ground area for the antenna of the DUT. The ground area includes a slot that the antenna feed impedance is not affected or not affected significantly. The probe is adapted to weakly couple to the antenna of the DUT via the opening to probe a signal when the antenna of the DUT is fed by the circuit of the DUT and/or in order to couple a signal to the antenna which is fed to the circuit of the DUT by the antenna.

Abstract: An apparatus for detecting a condition or authenticity of one or more electronic devices includes an enclosure having an antenna integrated therewithin, a fixture mounted within a hollow interior of the enclosure, the fixture being configured to receive the one or more electronic devices and connect one or more signals to each of the one or more electronic devices and a sensor and controller assembly connected to the antenna and configured to process a signature of an emission of a radiofrequency (RF) energy from of one or more electronic devices having the one or more signals connected thereto.

Abstract: A system includes a first differential amplifier and a first transformer with a primary coil coupled to an output of the first differential amplifier and with a secondary coil coupled to a load. The system also includes a second differential amplifier and a second transformer with a primary coil coupled to an output of the second differential amplifier and with a secondary coil coupled in series with the secondary coil of the first transformer. The system also includes a tuning network coupled to a center tap node between the secondary coil of the first transformer and the secondary coil of the second transformer.

Abstract: An exemplary coil arrangement can be provided, which can include, for example, coil element(s) having a parallel resonant circuit at a port, where the coil element(s) is detuned by causing a low impedance at the port. Pre-amplifier arrangements can provide a low impedance at the port of the coil element(s) to suppress the induced current on the coil element(s) thereby reducing the inductive coupling to neighboring element(s). The coil element(s) can include an inductance and a capacitance which cancel each other out. The inductance and the capacitance can cancel each other out such that an impedance of the coil element has no imaginary part at a working frequency. An impedance of the coil element(s) in free space includes a real part that can be greater than a sum of losses for the coil element(s).

Abstract: An antenna measurement system is configured to measure a radiation field pattern of an AUT fixed on a reference surface. The antenna measurement system includes an articulated robot, a measurement component, and a processor. The articulated robot is seated on a periphery of the reference surface, with a movable end capable of scanning a short-distance area defined by the reference surface. The measurement component is arranged on the movable end of the articulated robot, and a front surface of the measurement component is a specific geometric surface, which is used to face the antenna for radiation measurement. The processor is coupled to the movable end to control the movable end to drive the measurement component to move relative to the antenna along a predefined scanning path, and keep the specific geometric surface facing the antenna during the movement along the scanning path.

Abstract: A support frame is provided that includes an upper plate, a lower plate, side support members, an upper support structure, and a lower support structure. The upper plate defines a first inner surface and an opposed first outer surface. The lower plate defines a second inner surface and an opposed second outer surface. A TEM test space is defined between the first inner surface and the second inner surface. The side support members are disposed between the upper plate and the lower plate proximate a periphery of the test space. The upper support structure is coupled to and supports the upper plate. The upper support structure extends from the first outer surface of the upper plate. The lower support structure is coupled to and supports the lower plate. The lower support structure extends from the second outer surface of the lower plate.

Abstract: A shielding box for testing a transmission antenna and a reception antenna includes a first box, a second box, a third box, and an absorption material. The transmission antenna is positioned in the first box. The reception antenna is positioned in the third box. The absorption material is distributed over the inner surfaces of the first box, the second box, and the third box, respectively. The third box is connected through the second box to the first box. The second box provides a relatively narrow connection path for reducing the multipath interference between the transmission antenna and the reception antenna.

Abstract: A multi-target dynamic simulation test system for vehicle-mounted millimeter-wave (MMW) radar. The test system includes an antenna turntable, a radar pan-and-tilt head (PTH), a radar echo simulation module, a control module, a signal acquisition module and a display. A test radar is driven by the radar PTH to pan or tilt. The radar PTH and the test radar are both placed in a darkroom module. An antenna is driven by the antenna turntable to pan. The control module sends expected states of the test radar and the antennas to the radar PTH and the antenna turntable, respectively, and sends relative states between host vehicle and virtual targets to the test radar after processing by the radar echo simulation module. The signal acquisition module acquires and stores a detection signal of the test radar, and transmits the detection signal of the test radar to the display for real-time display.

Abstract: A system for the automated validation of a semi-anechoic chamber (SAC) is disclosed. The system includes a receive assembly and a transmit assembly, each configured to autonomously relocate within the SAC. The system also includes a local client communicatively coupled to the transmit assembly. The local client is configured to send a validation arrangement to the transmit assembly describing a validation location and a distance. The transmit assembly is configured to receive the validation arrangement, move the transmit assembly to the validation location and send an instruction to the receive assembly, the instruction describing the distance. The receive assembly is communicatively coupled to the transmit assembly and configured to receive the instruction and move the receive assembly such that a separation between the transmit and receive assemblies is restored to the distance. Each validation arrangement corresponds to a validation point. A plurality of validation points defines a test volume.

Abstract: A method for calibrating a transmitter-to-receiver (T2R) relative phase in millimeter wave (mmWave) beamforming system includes: transmitting a first calibrated signal to a second antenna of the mmWave beamforming system through a first antenna of the mmWave beamforming system according to a first transmitter (TX) input signal; receiving the first calibrated signal through the second antenna, and obtaining a first loopback receiver (RX) signal according to the first calibrated signal received by the second antenna; transmitting a second calibrated signal to the first antenna through the second antenna according to a second TX input signal; receiving the second calibrated signal through the first antenna, and obtaining a second loopback RX signal according to the second calibrated signal received by the first antenna; and calibrating the T2R relative phase according to a phase difference between the first and second loopback RX signals.

Abstract: The present disclosure relates to an adaptive antenna radome heating system (200, 300, 400) for a point to point radio link, where the adaptive antenna radome heating system comprises a processing unit (150, 220, 420) and at least one point to point radio link transceiver (TRX) (111, 121; 210A, 210B, 210C). Each TRX comprises an antenna radome (110, 120) having an antenna radome heating device (140, 141) configured to be activated by a control signal (R1, R2, RN). The processing unit (150, 220, 420) is arranged to determine an onset of accumulated precipitation on the antenna radome of the at least one TRX (111, 121; 210A, 210B, 210C) and to activate the corresponding antenna radome heating device (140, 141) by the control signal (R1, R2, RN) in response to determining the onset of accumulated precipitation.

Abstract: A radio frequency (RF) test hat. The RF test hat may comprise: a cylinder having forward and aft ends, end cap, arm and strap assembly, first and second absorber materials, a receiving antenna, and lens. The end cap may couple to the forward end of the cylinder. The arm and strap assembly may hingedly couple to the aft end of the cylinder and may be configured to mount the RF test hat onto a pod or transmitting antenna. The first absorber material may be located within the forward end of the cylinder. The second absorber material may be located near the aft end of the cylinder. The receiving antenna, which may be disposed within the first absorber material, may measure the intensity of a beam of electromagnetic radiation. The lens, which may be located within the middle portion of the cylinder, may spread the beam across a larger surface area of the first absorber material.

Abstract: A radio frequency (RF) test hat. The RF test hat may comprise: a body having a substantially rectangular portion with open forward and aft ends, an end cap, arm and strap assembly, absorber material, a receiving antenna, lens, and upper and lower mesh screens. The end cap may couple to the open forward end of the body. The arm and strap assembly may hingedly couple to the open aft end of the body. The absorber material may be within the end cap. The receiving antenna may be disposed within the first absorber material and may measure the intensity of a beam of electromagnetic radiation. The lens may be located within the middle portion of the body and may spread the beam across a larger surface area of the absorber material. The upper and lower mesh screens may be disposed between the end cap and lens and may comprise openings that are substantially hexagonal in shape.

Abstract: Multiple feed, front-shielded, coplanar waveguide, direct-fed, cavity-backed slot antennas are described. Various implementations form an antenna unit capable of millimeter waveform and/or microwave waveform transmissions. An antenna comprises a conductive plate that includes an aperture. The aperture has a shape that extends along an axis that bisects the aperture into first and second bisected portions, the first bisected portion having a first geometry type, and the second portion having a second geometry type that is a bilateral symmetry shape type of the first geometry type. In implementations, the aperture is configured to radiate waveforms within a frequency range from about between 600 Megahertz (MHz) to 72 Gigahertz (GHz) by applying multiple signal feeds to the conductive plate.

Abstract: A testing device includes a testing socket and a reflector. The testing socket defines an accommodating space. The reflector is disposed in the accommodating space and has a plurality of reflection surfaces non-parallel with each other. The reflection surfaces define a transmission space.

Abstract: Front-shielded, coplanar waveguide, direct-fed, cavity-backed slot antennas are described. Various implementations form an antenna unit capable of millimeter waveform and/or microwave waveform transmissions. A bottom shielding structure of the antenna unit defines a cavity, where various implementations include one or more dampening structures within the cavity. Some implementations includes a slot antenna within the cavity defined by the bottom shielding structure, such as a coplanar waveguide (CPW) direct-fed slot antenna, to form a cavity-backed slot antenna. Some implementations connect a top shielding structure to the bottom shielding structure to encase the slot antenna. In one or more implementations, the top shielding structure includes aperture windows to allow waveforms within a frequency range from about between 600 Megahertz (MHz) to 72 Gigahertz (GHz). and radiated by the slot antenna to radiate outward from the antenna unit.

Abstract: A measurement device for measuring performance of at least one antenna system in a first frequency band and in a second frequency band. The measurement device including an outer chamber having inwardly radio frequency reflective walls configured to enclose the antenna system, an inner chamber deployable inside the outer chamber, the inner chamber having radio frequency absorptive walls configured to enclose the antenna system, a first test antenna arrangement arranged inside the outer chamber and configured for a measurement operation in the first frequency band, and a second test antenna arrangement arranged inside the inner chamber and configured for a measurement operation in the second frequency band, thereby enabling measuring performance of the antenna system in a reflective radio frequency environment by the first test antenna arrangement and measuring performance in an essentially anechoic radio frequency environment by the second test antenna arrangement.

Abstract: A beamformer for providing signals from a device under test (DUT) and an emulator is disclosed. The beamformer includes: a radio frequency (RF) interface configured to receive a plurality of radio beams and convert a data stream comprising a plurality of radio beams from analog signals to digital signals; a radio samples processor configured to receive the digital signals, decouple data samples from the plurality of radio beams, and recombine the data samples to provide a single data stream to a corresponding single device used by an end-user; and a local processor adapted to dynamically adjust operational parameters in the radio samples processor of the single data stream.

Abstract: A method includes defining a Center-of-Radiation Reference for a device under test, the CORR indicating a reference origin of an electromagnetic wave pattern formable with the DUT; determining a 3-dimensional orientation information with respect to the CORR, the 3-dimensional orientation information indicating a direction of the electromagnetic wave pattern; and providing the CORR and the 3-dimensional orientation information to a measurement system.

Abstract: The present application provides a method and an apparatus of modulating a neuronal firing frequency at a brain functional site in a brain, the method comprising: generating an electromagnetic field with its power in variation at the preset modulating frequency; and arranging the generated electromagnetic field near the brain such that the brain functional site is within the range of the near field of the electromagnetic field, to polarize extracellular fluid at the brain functional site with the power of the electromagnetic field, such that a polarization density of the extracellular fluid varies at the preset modulating frequency and neurons in the extracellular fluid are modulated to fire at the preset modulating frequency.

Abstract: An antenna structure and a mobile device including the same are provided. The mobile includes a metal back cover and an antenna structure. The metal back cover has an open slot. The antenna structure includes a feeding metal radiator, a first grounded metal radiator, a second grounded metal radiator, and a substrate. The feeding metal radiator includes a first radiating portion, a first connecting portion, a second radiating portion and a feeding portion. The first radiating portion extends along a second direction from one side of the opening slot. The second radiating portion is coupled with the first radiating portion through the first connecting portion. The feeding portion is connected to the second radiating portion and extends along the second direction from one side of the open slot.