公开(公告)号：US20080204041A1

公开(公告)日：2008-08-28

申请号：US11680610

申请日：2007-02-28

Applicant: Keith F. Anderson ,  David V. Blackham ,  Joel P. Dunsmore ,  Loren C. Betts ,  Nicholas C. Leindecker

Inventor： Keith F. Anderson ,  David V. Blackham ,  Joel P. Dunsmore ,  Loren C. Betts ,  Nicholas C. Leindecker

IPC: G01R27/04

CPC classification number: G01R27/28 ,  G01R27/04

Abstract: A measurement and correction method provides for a complete full correction of a true-mode system using only the single ended error matrix developed for 4 port correction of single ended measurements. The degree of misalignment of the balanced sources may be determined from these measurements.

Abstract translation: 测量和校正方法提供了仅使用针对单端测量的4端口校正开发的单端误差矩阵的真模式系统的完全完全校正。 可以从这些测量中确定平衡源的未对准程度。

公开(公告)号：US06836743B1

公开(公告)日：2004-12-28

申请号：US10273015

申请日：2002-10-15

Applicant: David V. Blackham ,  Douglas K. Rytting

Inventor： David V. Blackham ,  Douglas K. Rytting

IPC: G06F1900

CPC classification number: G01R35/005 ,  G01R27/32

Abstract: A method and a vector network analyzer compensate for unequal source match and load match of a test port of the vector network analyzer. The method characterizes the source match and the load match, computes a delta-match factor from the characterized source match and load match, and uses the delta-match factor to compensate for the difference. The method compensates S-parameter data for a device under test measured by the vector network analyzer. The vector network analyzer comprises a computer program that, when executed by a controller, implements a calibration compensation.

Abstract translation: 一种方法和矢量网络分析仪补偿了矢量网络分析仪测试端口的不相等的源匹配和负载匹配。 该方法表征源匹配和负载匹配，根据特征源匹配和负载匹配计算增量匹配因子，并使用增量匹配因子来补偿差异。 该方法补偿由矢量网络分析仪测量的被测设备的S参数数据。 矢量网络分析器包括计算机程序，当由控制器执行时，执行校准补偿。

公开(公告)号：US20080020726A1

公开(公告)日：2008-01-24

申请号：US11486924

申请日：2006-07-14

Applicant: David V. Blackham ,  Kenneth H. Wong ,  Keith F. Anderson ,  Hassan Tanbakuchi

Inventor： David V. Blackham ,  Kenneth H. Wong ,  Keith F. Anderson ,  Hassan Tanbakuchi

IPC: H04B1/06 ,  H04B7/00

CPC classification number: G01R27/28

Abstract: A vector network analyzer with one or more ports having each port comprising of an N-port signal separating network, where N>=6, an intermediate frequency (IF) filter interposing an RF downconverter and a power detector. The RF downconverter may be N-2 mixers or N-2 samplers. The IF downconverter (comprising N-2 IF filters and power detectors) may also be realized by an AID converter having N-2 inputs connected to a digital signal processor.

Abstract translation: 具有一个或多个端口的矢量网络分析器，每个端口包括N端口信号分离网络，其中N≥6，插入RF下变频器和功率检测器的中频（IF）滤波器。 RF下变频器可以是N-2个混频器或N-2个采样器。 IF下变频器（包括N-2个IF滤波器和功率检测器）也可以由具有连接到数字信号处理器的N-2个输入的AID转换器来实现。

公开(公告)号：US07124049B2

公开(公告)日：2006-10-17

申请号：US11028159

申请日：2005-01-03

Applicant: Kenneth H. Wong ,  David V. Blackham ,  James C. Liu ,  Keith F. Anderson

Inventor： Kenneth H. Wong ,  David V. Blackham ,  James C. Liu ,  Keith F. Anderson

IPC: G06F19/00

CPC classification number: G01R27/28 ,  G01R35/005

Abstract: In one embodiment, a method comprises storing parameters that are related to switch error correction terms of a vector network analyzer (VNA), and applying a calibration process of a TRL group of calibration processes to the VNA to generate calibration measurements, wherein the calibration process generates calibration measurements, calculates a switch error correction matrix using the stored parameters and a subset of the calibration measurements, and applies the switch error correction matrix to calibration measurements before solving for eight-systematic error terms associated with the calibration process.

Abstract translation: 在一个实施例中，一种方法包括存储与矢量网络分析仪（VNA）的切换误差校正项相关的参数，以及将校准过程的TRL组的校准过程应用于VNA以产生校准测量，其中校准过程 生成校准测量，使用存储的参数和校准测量的子集计算开关误差校正矩阵，并在求解与校准过程相关的八个系统误差项之前将开关误差校正矩阵应用于校准测量。

公开(公告)号：US07019536B1

公开(公告)日：2006-03-28

申请号：US11028032

申请日：2005-01-03

Applicant: Keith F. Anderson ,  David V. Blackham ,  Brad R. Hokkanen ,  Kenneth H. Wong

Inventor： Keith F. Anderson ,  David V. Blackham ,  Brad R. Hokkanen ,  Kenneth H. Wong

IPC: G01R35/00

CPC classification number: G01R35/005 ,  G01R27/28

Abstract: In one embodiment, a method of calibrating a multi-port vector network analyzer (VNA) includes (i) performing two-port calibrations on pairs of ports to determine forward and reverse systematic error terms associated with each pair of ports, wherein the pairs of ports are selected such that each port's systematic error terms (directivity, source match, reflection tracking, and load match) are determined, (ii) generating a switch error correction matrix using data from the two-port calibrations, and (iii) performing unknown thru calibration for at least one pair of ports that was not utilized in step (i), wherein the unknown thru calibration comprises applying the switch error correction matrix to measurement data and determining transmission tracking error terms using the corrected measurement data.

Abstract translation: 在一个实施例中，校准多端口矢量网络分析器（VNA）的方法包括（i）在端口对上执行双端口校准，以确定与每对端口相关联的正向和反向系统误差项，其中， 选择端口，使得确定每个端口的系统误差项（方向性，源匹配，反射跟踪和负载匹配），（ii）使用来自两端口校准的数据生成开关误差校正矩阵，以及（iii）执行未知 通过在步骤（i）中未使用的至少一对端口的校准，其中未知通过校准包括将开关误差校正矩阵应用于测量数据，并使用校正的测量数据确定传输跟踪误差项。

公开(公告)号：US07545150B2

公开(公告)日：2009-06-09

申请号：US11680610

申请日：2007-02-28

Applicant: Keith F. Anderson ,  David V. Blackham ,  Joel P. Dunsmore ,  Loren C Betts ,  Nicholas C. Leindecker

Inventor： Keith F. Anderson ,  David V. Blackham ,  Joel P. Dunsmore ,  Loren C Betts ,  Nicholas C. Leindecker

IPC: G01R35/00

CPC classification number: G01R27/28 ,  G01R27/04

Abstract: A measurement and correction method provides for a complete full correction of a true-mode system using only the single ended error matrix developed for 4 port correction of single ended measurements. The degree of misalignment of the balanced sources may be determined from these measurements.

Abstract translation: 测量和校正方法提供了仅使用针对单端测量的4端口校正开发的单端误差矩阵的真模式系统的完全完全校正。 可以从这些测量中确定平衡源的未对准程度。

公开(公告)号：US07148702B2

公开(公告)日：2006-12-12

申请号：US11093456

申请日：2005-03-30

Applicant: Kenneth H. Wong ,  David V. Blackham ,  Joel P. Dunsmore

Inventor： Kenneth H. Wong ,  David V. Blackham ,  Joel P. Dunsmore

IPC: G01R27/28 ,  G01R27/04 ,  G01R35/00 ,  G06F17/50

CPC classification number: G01R27/28

Abstract: In one embodiment, a vector network analyzer (VNA) comprises a plurality of ports for coupling to a device under test (DUT), at least one reference receiver for measuring signals associated with the DUT, and logic for processing measurement data from the at least one reference receiver to compensate for transmission line effects, wherein the logic for processing evaluates a function, of several controllable variables, that is a sum of multiple transmission line models, wherein each of the controllable variables is related to a respective transmission line length associated with a corresponding transmission line model.

Abstract translation: 在一个实施例中，矢量网络分析器（VNA）包括用于耦合到待测器件（DUT）的多个端口，用于测量与DUT相关联的信号的至少一个参考接收器，以及用于处理来自至少 一个用于补偿传输线效应的参考接收机，其中用于处理的逻辑评估几个可控变量的函数，其是多个传输线模型的总和，其中每个可控变量与相关联的传输线长度有关 相应的传输线模型。

公开(公告)号：US06995571B1

公开(公告)日：2006-02-07

申请号：US11028161

申请日：2005-01-03

Applicant: James C. Liu ,  Kenneth H. Wong ,  David V. Blackham

Inventor： James C. Liu ,  Kenneth H. Wong ,  David V. Blackham

IPC: G01R35/00

CPC classification number: G01R35/00 ,  G01R27/28 ,  G01R35/007

Abstract: In one embodiment, a method comprises applying a stimulus signal to a reference frequency translation device (FTD) by a vector network analyzer during a calibration mode, wherein the reference FTD possesses equal conversion efficiency in forward and reverse directions and the reference FTD possesses unknown input and output reflection characteristics; measuring a response of the reference FTD; and determining forward and reverse transmission tracking error terms using data from the measured response and single-port error calibration terms.

Abstract translation: 在一个实施例中，一种方法包括在校准模式期间通过矢量网络分析仪将激励信号施加到参考频率转换装置（FTD），其中参考FTD在正向和反向方向具有相等的转换效率，并且参考FTD具有未知输入 并输出反射特性; 测量参考FTD的响应; 以及使用来自测量响应和单端口错误校准项的数据确定正向和反向传输跟踪误差项。

公开(公告)号：US06823276B2

公开(公告)日：2004-11-23

申请号：US10407671

申请日：2003-04-04

Applicant: David V. Blackham ,  Kenneth H. Wong

Inventor： David V. Blackham ,  Kenneth H. Wong

IPC: G01D1800

CPC classification number: G01R35/005 ,  G01R27/28

Abstract: A system and method are disclosed which provide for flexible and accurate test apparatus error value calculation. Error value calculation of a testing apparatus requires at least one unique measurement for each unknown error value using the equation that relates the measured response, the predicted response and the error value. When more equations than unknowns can be acquired, the system of equations is over-determined and an improvement of accuracy is possible, but accuracy may be lost when the predicted responses are not trusted to the same degree. The disclosed system and method provide the increased accuracy of an over-determined system, while accounting for predicted responses of varying degrees of trust.

公开(公告)号：US6060888A

公开(公告)日：2000-05-09

申请号：US066801

申请日：1998-04-24

Applicant: David V. Blackham ,  Jason Chodora ,  Joel P. Dunsmore

Inventor： David V. Blackham ,  Jason Chodora ,  Joel P. Dunsmore

IPC: G01R35/00 ,  G01R27/28

CPC classification number: G01R27/28

Abstract: An error correction method improves measurement accuracy of a vector network analyzer by reducing reflection measurement errors for a broad class of devices, such as filters, switches, cables, couplers, attenuators, and other passive devices tested by vector network analyzers (VNAs) that are reciprocal, having a forward transmission coefficient S.sub.21 and a reverse transmission coefficient S.sub.12 that are equal. Errors due to impedance mismatches at the load port of a transmission/reflection (T/R) test set are corrected without impacting the measurement speed of the VNA. The source port of the T/R test set is calibrated and a reflection measurement is performed while an impedance matched thruline standard of known electrical length is coupled between the source port and load port of the T/R test set. The reflection measurement is corrected for the electrical length of the thruline standard to obtain a reflection measurement of the load port of the T/R test set. Then, the transmission and reflection characteristics of the DUT are measured. The reciprocity of the DUT and the reflection measurement of the load port are used to extract the actual input reflection coefficient of the DUT.

Abstract translation: 误差校正方法通过减少诸如滤波器，开关，电缆，耦合器，衰减器和其他被矢量网络分析仪（VNA）测试的无源器件的广泛类别的器件的反射测量误差，从而提高了矢量网络分析仪的测量精度。 具有相等的正向传输系数S21和反向传输系数S12。 在传输/反射（T / R）测试装置的负载端口处由于阻抗失配导致的错误被校正，而不会影响VNA的测量速度。 校准T / R测试装置的源端口，并且在T / R测试装置的源端口和负载端口之间耦合已知电气长度的阻抗匹配thruline标准的同时进行反射测量。 根据标准的电气长度对反射测量进行校正，以获得T / R测试装置的负载端口的反射测量值。 然后，测量DUT的透射和反射特性。 DUT的互易性和负载端口的反射测量用于提取DUT的实际输入反射系数。