Abstract: A system, device and method for optimization of a radiated transmission matrix by the selecting probe antennae and applying a compensation network in the test system are described. Among other benefits, the anechoic chamber in which the DUT is disposed is comparatively small and inexpensive. The time-consuming process of inverse matrix tuning or isolation level checking that plagues known systems, device and methods of testing DUT is substantially avoided. Because of small size of shield box and probe antenna selection algorithm, low path loss and acceptable power in testing can be realized.

Abstract: A system and method test sustained and anti-islanding capabilities of EUT, where a power island is sustained without anti-islanding functionality and becomes de-energized with anti-islanding functionality. The method includes applying grid voltage to the EUT to obtain measurement current from the EUT; calculating RLC component values of a programmable RLC filter from measurement current and source voltage, including calculating target gain and phase, calculating target R, L and C parameters using the target gain and phase, and translating the target R, L and C parameters to physical parameters; applying the physical parameters and the measurement current to the programmable RLC filter to obtain RLC voltage; comparing the RLC voltage to source voltage; and when the RLC voltage is substantially the same as the source voltage, predicting that transition to a power island with the applied RLC component values will be sufficiently smooth to avoid triggering system protections of the EUT.

Abstract: A method for planning and executing a test of a DUT includes receiving a test description from a user via a GUI, where the test description identifies the DUT and an objective of the test; composing a prompt for querying a large language model (LLM) based on the test description, where LLM includes a trained machine learning algorithm; sending the prompt to the LLM via an API; determining, using the LLM, a test plan for executing the test to be performed in response to the prompt to achieve the objective of the test based on the test description and general testing information, where the test plan identifies a type of test, test instruments for performing the test, a test procedure using the instrument, and parameters of the DUT to be measured according to the test procedure; providing, via the GUI, the test plan to the user for testing the DUT.

Abstract: An optical system has a plurality of surfaces. In addition, a specification of a sequential ray trace through the optical system specifies an order of surface elements for tracing rays through the optical system. The sequential ray trace may be for stray light rays rather than for the primary rays propagating through the optical system. The surface elements include a surface set. The surface set includes at least two of the surfaces in the optical system. Rays are traced through the optical system according to the sequential ray trace. For example, the specification of the sequential ray trace may also specify a maximum number N of surface-intersections for the surface set. Rays are traced through the optical system with up to N surface-intersections with the surfaces in the surface set, and without regard to the order in which rays intersect the surfaces in the surface set.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for analyzing and displaying wireless signal data captured by a wireless signal capture and data analyzer device. The method includes capturing wireless in-phase and quadrature (IQ) signals transmitted over an air interface between a real or emulated wireless base station and one or more real or emulated user equipment (UE) devices. The device stores parameters from the captured IQ signals in a log file and provides a graphical user interface (GUI) that displays the parameters and enables a user to select them. The GUI receives user inputs selecting one or more parameters and a selectable operators. The device then performs an operation corresponding to the selectable operator on the one or more parameters and generates an output and presents the output to the user via the graphical user interface.

Abstract: A system emulates multipath effects of a radar signal transmitted by a radar and reflected from an emulated target and an emulated surface. The system includes RTSs configured to generate and transmit emulated echo signals having different phases in response to the radar signal, where a first RTS is configured to emulate the emulated target, receiving the radar signal via a direct path, and at least one second RTS is configured to emulate at least one ghost target corresponding to the emulated target; and a controller configured to control the RTSs to generate and transmit the emulated echo signals at the different phases, which correspond to the RTSs receiving the radar signal from the radar transmitter and the radar receiver receiving the emulated echo signals from the RTSs over different combinations of the direct the indirect paths to replicate interference effects caused by multipath propagation.

Abstract: A hardware-in-the-loop (HiL) test system is for testing sensor fusion of an advance driver assistance system (ADAS). The ADAS includes a plurality of sensors and an electronic control unit (ECU) processing outputs of the sensors. The HiL test system includes a three-dimensional (3D) scenario simulator for generating drive scenarios including objects in a surrounding environment of a simulated vehicle, and a sensor target emulator for generating emulated sensors inputs to the plurality of sensors corresponding to the drive scenarios generated by the 3D scenario simulator. The sensor target emulator is configured to synchronize the emulated sensor inputs by interpolating a current location of the objects from parameters extracted from the drive scenarios.

Abstract: An antenna array controller is configured to measure a magnitude and phase of each of a set of antenna array elements, and compensate for leakage of other elements of the set of array elements. The leakage may be compensated for by one or more mechanisms including phase cancellation by row of antenna array elements, programmatic cancellation via a single offsetting antenna array element of the antenna array elements, and deembedding array leakage by subtracting the array leakage from the measured data.

Abstract: A system and method are provided for compiling a bare quantum-logic circuit.

Abstract: A system is provided for measuring a power radiated pattern of an incident radio frequency (RF) signal indicating spatial distribution characteristics of a device under test (DUT). The system includes multiple antenna elements arranged in an array, where the antenna elements include antennas and diodes coupled to the antennas, respectively. Each antenna has a radar cross-section (RCS) that is too small for the antenna elements to operate in a reflect mode. Each diode is zero biased, such that the diodes receive the incident RF signal through the antennas to which the diodes are respectively coupled, and rectify the incident RF signal to DC voltages that are proportional to power of the incident RF signal, enabling the antenna elements to operate in a detect mode.

Abstract: A circuit for processing data for radio frequency (RF) spectrum signals includes an input interface; a controller includes a controller memory that stores instructions. A processor executes the instructions, causing a circuit to: obtain representative RF feature vectors of pre-sorted cluster information for the RF spectrum signals via the input interface; group the representative RF feature vectors of the pre-sorted cluster information for the RF spectrum signals into final clusters for the RF spectrum signals; compute representative RF feature vectors for the final clusters for the RF spectrum signals; determine signal occupancy of each final cluster within a corresponding set display time for each of the RF spectrum signals; and generate visualization data for each final cluster for the RF spectrum signals for a display in accordance with the signal occupancy within the corresponding set display time for the RF spectrum signals.

Abstract: Methods, systems, and computer readable media for link multiplexing and forwarding packets in a test environment are disclosed. One example method occurs at a network switch comprising a first plurality of ports and a second plurality of ports, wherein each of the first plurality of ports is connected to one of a plurality of traffic generators and each of the second plurality of ports is connected to a system under test (SUT). The method comprises receiving, by the network switch, test packets via the first plurality of ports, wherein a first portion of the test packets includes a first aggregation identifier associated with a first egress port of the second plurality of ports; and forwarding, using the first aggregation identifier and at least one corresponding egress forwarding rule, the first portion of the test packets via the first egress port toward the SUT.

Abstract: A system for measuring and calibrating an antenna array having a plurality of antenna array elements each configured to individually radiate signals is described. The system includes an antenna array controller comprising a memory that stores instructions and a processor that executes the instructions. When executed by the processor, the instructions cause the system to: measure a magnitude and phase of each of a set of antenna array elements; and compensate for leakage of other antenna array elements of the set of antenna array elements.

Abstract: A system for testing a cellular device under test (DUT) includes a display device for displaying a mirror image of a screen of the cellular DUT, and a network emulator configured to emulate a cellular network while in communication with the cellular DUT. The system further includes a sequencer engine module, including a graphical user automated testing interface displayed on the display device together with the mirror image of the screen of the cellular DUT, configured to control the network emulator and the cellular DUT, to automatically run a sequence of test commands on the cellular DUT, and to automatically run user emulation scripts. The system further includes a user emulation module configured to emulate a graphical user interface of the DUT by generating the user module scripts according to the sequence of test commands. The system further includes a data analytics module configured to generate display data of measurement results of the DUT on the display device.

Abstract: A system for rotating polarization of radio frequency (RF) waves includes a flange configured to couple to a waveguide interface at a first side of the flange. The flange includes a recess at the first side of the flange, a rectangular cavity through the flange and located in the recess, and pins extending from the recess. The system further includes a plurality of shims configured for stacking in the recess. The shims each include a rectangular cavity and holes configured to receive the pins and position the plurality of shims in the recess such that the rectangular cavities form a spiral configured to rotate polarization of linearly-polarized RF waves received at the flange from a first polarization to a second polarization angularly rotated from the first polarization.

Abstract: A method for measuring even/odd jitter (EOJ) in digital signals includes receiving a signal under test (SUT), where the SUT includes a waveform of even symbols and odd symbols constituting an even-length test pattern. The method further includes generating a first pulse-fit vector for the even symbols of the waveform and a second pulse-fit vector for odd symbols of the waveform, and determining the EOJ of the SUT by measuring and comparing respective widths of the first and second pulse-fit vectors.

Abstract: An apparatus, a method and a system for testing a battery are disclosed. A voltage source adapted to apply a voltage to an assembly having a first battery electrode, a second battery electrode and a separator layer disposed between the first and second battery electrodes. A current logger is adapted to measure a current caused by partial discharges in the separator layer caused by the contaminants or voids in the separator layer, or at an interface between the first battery electrode and the separator layer, or at an interface between the second battery electrode and the separator layer, or in the separator layer. The voltage is less than a threshold value of a characteristic breakdown voltage of the separator layer.

Abstract: Methods, systems, and computer readable media for a heuristic approach to facilitating analysis of radio frequency recordings. An example method includes receiving a time series of radio frequency (RF) spectra of a test RF signal; identifying first detected signals within the time series of RF spectra; relating the first plurality of detected signals to second detected signals within the time series of RF spectra; characterizing the first detected signals and the second detected signals with a set of characteristic parameters; and outputting a reduced size time series of RF spectra using the set of characteristic parameters.

Abstract: A system and method for measuring a resistance (R)-magnetic field (H) curve of a magnetoresistive random-access memory (MRAM) device is described. The system includes a calibration fixture adapted to provide initial measured magnetic field data for setting a measured distance and a coil current of a coil of an electromagnet for a plurality of magnetic field strengths at a plurality of predetermined distances from an end surface of the electromagnet; a power supply adapted to provide a coil current to the electromagnet; and a laser displacement meter adapted to measure a distance from the end surface of the electromagnet to a device under test (DUT). The electromagnet is adapted to generate magnetic fields at a predetermined magnetic field sweep interval within a magnetic field sweep range from a value of a first magnetic field strength to a value of a second magnetic field strength.

Abstract: A test system implemented method removes intrinsic noise from a waveform representation of a repeating signal under test (SUT). The method includes obtaining an oversampled equivalent-time waveform representation of the repeating SUT. The method further includes obtaining a time-domain representation of a combined noise of the equivalent-time waveform above the deterministic maximum frequency by applying the equivalent-time waveform to a high-pass filter. The method further includes determining a standard deviation of the time-domain representation of the combined noise, and determining a correction factor ? in accordance with the standard deviation of the digitizer noise, and the standard deviation of the time-domain representation of the combined noise.