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1. 发明公开

US20240361376A1 REMOVING TEST EQUIPMENT NOISE FROM POWER SPECTRAL DENSITY MEASUREMENTS 审中-公开
公开(公告)号：US20240361376A1
公开(公告)日：2024-10-31
申请号：US18144019
申请日：2023-05-05
申请人： LitePoint Corporation
发明人： Chen Cao , Christian Volf Olgaard , Ruizu Wang , Qingjie Lu
IPC分类号： G01R31/28 , G01R23/18
CPC分类号： G01R31/2837 , G01R23/18 , G01R31/2841
摘要： An example method includes the following operations: (i) receiving a device signal from a device under test (DUT); (ii) setting an attenuation value; (iii) applying the attenuation value to the device signal to produce an attenuated device signal for a frequency spectrum analyzing device, where the frequency spectrum analyzing device produces a noise signal; (iv) obtaining a power spectral density value using the frequency spectrum analyzing device, where a power spectral density comprises a power, at a frequency value, of a combined signal that is based on the attenuated device signal and the noise signal; (v) repeating operations (ii), (iii), and (iv) one or more times to produce multiple power spectral density values; (vi) repeating operations (i), (ii), (iii), (iv), and (v) one or more times to add power spectral density values to the multiple power spectral density values; and (vii) obtaining a power spectral density of the device signal.

2. 发明授权

US11454662B1 System and method for over-the-air (OTA) testing to detect faulty elements in an active array antenna of an extremely high frequency (EHF) wireless communication device 有权
公开(公告)号：US11454662B1
公开(公告)日：2022-09-27
申请号：US17471868
申请日：2021-09-10
申请人： LitePoint Corporation
发明人： Minh-Chau Huynh
IPC分类号： G01R27/28 , G01R29/10 , H01Q3/26
摘要： Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. Configurable (e.g., electrically) scatter probes provide maximized modulation depths (MDs) over wide frequency ranges.

3. 发明授权

US10536226B1 System and method for over-the-air (OTA) testing to detect faulty elements in an active array antenna of an extremely high frequency (EHF) wireless communication device 有权
公开(公告)号：US10536226B1
公开(公告)日：2020-01-14
申请号：US16036432
申请日：2018-07-16
申请人： LitePoint Corporation
发明人： Minh-Chau Huynh , Christian Volf Olgaard
IPC分类号： H04B3/46 , H04B17/00 , H04Q1/20 , H04B17/10 , G01R29/10 , H04B17/29 , H04B17/18 , H04B17/391 , H04B17/17
摘要： Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.

4. 发明申请

US20180351664A1 METHOD FOR IMPROVED ACCURACY OF LOW POWER RADIO FREQUENCY (RF) SIGNAL MEASUREMENTS WHEN USING RECEIVED SIGNAL STRENGTH INDICATOR (RSSI) FUNCTIONS 审中-公开
公开(公告)号：US20180351664A1
公开(公告)日：2018-12-06
申请号：US15535135
申请日：2016-12-22
申请人： LitePoint Corporation
发明人： Christian Volf Olgaard , Ruizu Wang , Qing Jie Lu
IPC分类号： H04B17/318
CPC分类号： H04B17/318 , H04B17/21
摘要： A method for improving accuracy of power measurements of low power radio frequency (RF) signals received by a RF signal receiver in which power measurement accuracy taken at a low resolution is compensated with use of multiple RF signal attenuations at a finer resolution. In accordance with exemplary embodiments, incremental RF signal attenuations are applied to the received RF signal. An average of the power measurements, including those with the applied signal attenuations, has a net measurement error less than that of a direct power measurement.

5. 发明授权

US10097282B1 System and method for testing a device under test (DUT) capable of determining relative times of arrival or angles of arrival of multiple radio frequency signals 有权
公开(公告)号：US10097282B1
公开(公告)日：2018-10-09
申请号：US15881181
申请日：2018-01-26
申请人： LitePoint Corporation
发明人： Yen-Fang Chao , Christian Volf Olgaard
IPC分类号： H04B17/10 , H04B17/29 , H04W24/06 , H04B17/364 , H04B17/00 , H04B17/391
摘要： System and method for providing variable time delays with high temporal granularity and consistent broadband delay performance for testing of time-of-arrival (ToA) or angle-of-arrival (AoA) performances of radio frequency (RF) signal transceivers. Multiple delays may be imparted to a common RF signal to provide multiple delayed RF signals corresponding to RF signals originating from a source location and received at various locations having respective position coordinates relative to respective orthogonal axes, plus another delayed RF signal corresponding to a RF signal originating from the source location and received at a location at an intersection of the orthogonal axes.

6. 发明授权

US10079626B1 Method for enabling confirmation of expected phase shifts of radio frequency signals emitted from an antenna array 有权
公开(公告)号：US10079626B1
公开(公告)日：2018-09-18
申请号：US15585831
申请日：2017-05-03
申请人： LitePoint Corporation
发明人： Christian Volf Olgaard , Zhiyong Huang
IPC分类号： H04B7/04 , H04B7/06 , H04B17/00 , H04B17/24 , H04B7/0417 , H04B7/0452 , H04B7/0456
CPC分类号： H04B7/0421 , H04B7/0452 , H04B7/046 , H04B7/0634 , H04B17/0085 , H04B17/24
摘要： A method for assessing receiver signal reception performance during wireless beam steering operation of a radio frequency (RF) data packet signal transceiver capable of multiple input, multiple output (MIMO) operation. In response to transmissions of a sounding packet (SP) from a beamforming device (“beamformer”), a receiving device (“beamformee”) transmits a response data packet containing matrix data representing a beamforming feedback matrix (BFM) related to signal attenuation by the wireless signal path environment through which the beamformer and beamformee are communicating. Using the matrix data, a statistical variation can be computed which is indicative of signal reception performance of the beamformee.

7. 发明授权

US09720023B2 Vector network power meter 有权
公开(公告)号：US09720023B2
公开(公告)日：2017-08-01
申请号：US14270672
申请日：2014-05-06
申请人： Litepoint Corporation
发明人： Christopher Dennis Ziomek , Stephen Jachim
IPC分类号： G01R27/04 , G01R27/28
CPC分类号： H04B17/16 , G01R27/28
摘要： System and method for implementing a Vector Network Power Meter (VNPM) as a new class of electronic test instrument that uses a novel topology based upon a reflectometer to combine the functionality of a Power Meter with that of a Vector Network Analyzer (VNA). The VNPM overcomes application limitations of the two existing classes of test instruments, including parallel and simultaneous measurement capability, in-circuit operation, and improved accuracy and repeatability by eliminating the calibration of interconnecting cabling. Also provided are alternate implementations of a correlator for the reflectometer which reduce the size and complexity of the correlator while extending its frequency range without limit.

8. 发明授权

US09167459B2 System and method for confirming radio frequency (RF) signal connection integrity with multiple devices under test (DUTs) to be tested concurrently 有权
标题翻译：用于确定要同时测试的多个待测器件（DUT）的射频（RF）信号连接完整性的系统和方法
公开(公告)号：US09167459B2
公开(公告)日：2015-10-20
申请号：US13791098
申请日：2013-03-08
申请人： LITEPOINT CORPORATION
发明人： Christian Volf Olgaard
IPC分类号： H04B17/00 , H04W24/08 , H04B17/17 , H01Q3/26 , H04B3/462
CPC分类号： H04W24/08 , H01Q3/267 , H04B3/462 , H04B17/0085 , H04B17/17
摘要： System and method for confirming radio frequency (RF) signal connections with multiple devices under test (DUTs) tested concurrently using replicas of a RF test signal. Cabled signal connections between the signal source and the DUTs are monitored by sensing levels of outgoing and related reflection RF signals. These signal levels are compared against similar signal levels when the outgoing RF signals are provided to reference impedances. Alternatively, the cabled signal connections have lengths of known signal wavelengths and the RF test signal frequency is swept such that minimum and maximum time delays between the outgoing and reflection RF signals go through minimum and maximum signal cycles with a difference of at least one full cycle. The reflection RF signal magnitude and phase are monitored, from which peak and valley signal level differences and phase changes are identified to determine return loss and phase changes indicative of DUT connection.
摘要翻译：使用RF测试信号的副本同时测试的多个待测器件（DUT）确定射频（RF）信号连接的系统和方法。通过感测输出和相关反射RF信号的电平来监测信号源和DUT之间的电缆信号连接。当将输出RF信号提供给参考阻抗时，将这些信号电平与类似的信号电平进行比较。或者，电缆信号连接具有已知信号波长的长度，并且扫描RF测试信号频率，使得出射和反射RF信号之间的最小和最大时间延迟经过最小和最大信号周期，其中至少一个全周期。监测反射RF信号幅度和相位，从中识别峰谷信号电平差和相位变化，以确定指示DUT连接的回波损耗和相位变化。

9. 发明授权

US09160554B1 Apparatus and method for operating automated test equipment (ATE) 有权
标题翻译：自动化测试设备（ATE）的设备和方法
公开(公告)号：US09160554B1
公开(公告)日：2015-10-13
申请号：US11931566
申请日：2007-10-31
申请人： Christian Volf Olgaard , Thomas Toldborg Andersen , Carsten Andersen
发明人： Christian Volf Olgaard , Thomas Toldborg Andersen , Carsten Andersen
IPC分类号： G01R31/14 , H04L12/26 , G01R31/3183
CPC分类号： H04L12/2697 , G01R31/31707 , G01R31/318307 , G01R31/319 , H04L43/50
摘要： An apparatus and method of operating automated test equipment (ATE) in a networked environment of multiple external test controllers. The system resources responsible for coordinating the shared uses of the ATE by the multiple external test controllers are centralized within the ATE. As a result, programming of the respective test controllers is simplified since the test controllers no longer need be responsible for communicating among themselves to coordinate or otherwise determine how and when access to the ATE is granted to any particular test controller.
摘要翻译：在多个外部测试控制器的网络环境中操作自动测试设备（ATE）的设备和方法。负责协调多个外部测试控制器的ATE共享使用的系统资源集中在ATE内。因此，各个测试控制器的编程被简化，因为测试控制器不再需要负责在它们之间进行通信，以协调或以其他方式确定如何以及何时向任何特定的测试控制器访问ATE。

10. 发明申请

US20150244477A1 METHOD FOR TESTING MULTIPLE WIRELESS DATA PACKET SIGNAL TRANSCEIVERS USING SHARED TESTING RESOURCES 审中-公开
标题翻译：使用共享测试资源测试多个无线数据包信号收发器的方法
公开(公告)号：US20150244477A1
公开(公告)日：2015-08-27
申请号：US14187926
申请日：2014-02-24
申请人： LITEPOINT CORPORATION
发明人： Jonathan Barry HIRST , Adam Martin SMITH
IPC分类号： H04B17/15
CPC分类号： H04B17/15 , H04B17/11
摘要： Method for testing multiple signal transceiver devices under test (DUTs), such as data packet signal transceivers, with a shared DUT testing resource, such as a tester having a single vector signal generator (VSG) and a single vector signal analyzer (VSA). Requests by the DUTs for access to tester resources (e.g., to receive signals from the signal generator or provide signals to the signal analyzer) are prioritized based upon tester availability and whether the requesting DUT requires sole access or can share access to the tester. If the tester is unavailable, DUT requests are queued according to their respective priorities to await tester availability. As a result, access to shared tester resources can be managed dynamically to minimize test time while testing multiple DUTs concurrently.
摘要翻译：用于测试多个信号收发器设备（DUT）的方法，例如具有共享DUT测试资源的数据分组信号收发器，例如具有单个矢量信号发生器（VSG）和单个矢量信号分析仪（VSA）的测试仪。 DUT的访问测试者资源的请求（例如，从信号发生器接收信号或向信号分析仪提供信号）根据测试者的可用性以及请求的DUT是否需要唯一的访问或者可以共享对测试者的访问来确定优先级。如果测试仪不可用，DUT请求将根据各自的优先级排队等待测试仪的可用性。因此，可以动态管理对共享测试人员资源的访问，以便在同时测试多个DUT时最大限度地减少测试时间。

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