Ets-Lindgren, Inc.

Emc Test Systems, L.p.

Electronic Label Technology, Inc.

Michael David Foegelle

Bryan Howard Sayler

Garth Anthony D'Abreu

Jari Vikstedt

John Foegelle

Kefeng Liu

Zhong Chen

A method and system for measuring a device under test are disclosed. In some embodiments, a method of implementing a measurement system is provided. The method includes providing a plurality of nodes, each node including a combination of a communication tester configured to generate a communication signal and a channel emulator configured to emulate a channel, and providing a user interface configured to enable a user to control at least one of the plurality of nodes.

Distributed system for radio frequency environment simulation

According to some embodiments, a system is provided for simulating a cluster of reflections. The system includes an array of antenna elements distributed in space over a solid angle having an angular spread. The solid angle is substantially less than a full sphere and each antenna element has a spatial orientation. The system also includes a variable path simulator connected to the antenna elements and configured to apply one of excitations to the antenna elements and weights to signals from the antenna elements. The variable path simulator enables simulation of a near field arising from a cluster of reflections of a multipath environment.

Methods and apparatus for evaluating radiated performance of MIMO wireless devices in three dimensions

In some embodiments, an electromagnetic measurement system to test a device under test, DUT, in a chamber is provided. Within the chamber, for each of at least one emulated channel, a first emulator core is configured to introduce an impairment in each of at least one transmit signal to produce an impaired signal, and a transmitter is configured to convert the impaired signal to a radio frequency, RF, signal to be transmitted by an antenna.

Methods, tests systems and computers for controlling power delivered to a test volume are provided. According to one aspect, an electromagnetic test system has at least one operational path having a channel emulator output, an amplifier, an attenuator and an antenna. A method includes, for a given desired output power level, C, setting a channel emulator output power to a power level B, and setting the attenuator to a setting A, such that C is a function of B and A. In such embodiments, the attenuation A is calculated based on an upper limit output power of the channel emulator and the desired output power C.

System and method for power control of an over-the-air RF environment emulator

In some embodiments, a positioning system is configured to position a plurality of antennas about a device under test (DUT). According to one embodiment, a positioning system includes a first positioner configured to hold a DUT and to provide motion of the DUT about a first axis, and a second positioner configured to hold a first antenna and to provide motion of the first antenna about a second axis.

Method and system for testing beam forming capabilities of wireless devices

Methods, tests systems and computers for controlling power delivered to a test volume are provided. According to one aspect, an electromagnetic test system has at least one operational path having a channel emulator output, an amplifier, an attenuator and an antenna. A method includes, for a given desired output power level, C, setting a channel emulator output power to a power level B, and setting the attenuator to a setting A, such that C is a function of B and A. In such embodiments, the attenuation A may be calculated based on an upper limit output power of the channel emulator and the desired output power C.

Some embodiments include a system for simulating electromagnetic environments that includes a channel emulator having a plurality of outputs, each output associated with a different operational path. Each operational path has a power amplifier, an antenna and a first coupling mechanism. The power amplifier is coupled to an output of the channel emulator. The antenna is in communication with a test region of the apparatus. The first coupling mechanism simultaneously couples power to the antenna and to a first measurement path when the operational path is coupled to the test region, so that a calibration state of the operational path can be determined and adjusted without interruption of a signal coupled to the antenna in the operational path.

System and method for calibration, monitoring and control of an anechoic boundary array RF environment simulator

A method and system for measurement of a device under test (DUT) are provided. According to one aspect, a system includes a first positioner having a first antenna and a second positioner having a second antenna. The system also includes circuitry configured to cause the first antenna to radiate a test signal to the DUT and to implement one of a probing mode and an interference mode. The probing mode causes, for each of at least one position of the first antenna, the second antenna to receive a signal from the DUT at each of the second set of positions of the second antenna. The interfering mode causes, for each of at least one position of the first antenna, the second antenna to transmit an interfering signal to the DUT at each of the second set of positions of the second antenna.

System and method for over-the-air testing of milli-meter wave and other beamforming technologies

A method and system for measuring a device under test are disclosed. In some embodiments, an electromagnetic measurement system to test a device under test, DUT is provided. The system includes, at a central location, an emulator core configured to introduce an impairment in each of at least one transmit signal to produce a digital impaired signal; and at a remote location, a transmitter configured to convert the digital impaired signal to an analog RF signal.

A method and system for selectively varying the performance of a test chamber are disclosed. According to one aspect, the performance is affected by a variable absorbing structure of the test chamber. The absorbing structure enables selective exposure of absorbing material to achieve a specific performance.

Reverberation chamber loading

A method and system for measuring a device under test are disclosed. Some embodiments include a distributed channel emulation system implementing a downlink channel, including at a central location, an emulator core configured to introduce an impairment in each of at least one transmit signal to produce at least one impaired signal for each of at least one emulated channel. The system includes, at a remote location, for each of at the least one emulated channel, an up-converter configured to up-convert an impaired signal of the emulated channel to produce a radio frequency, RF, signal.

Growing community of inventors

Cedar Park, TX, United States of America

Michael David Foegelle