公开(公告)号：US06310579B1

公开(公告)日：2001-10-30

申请号：US09570101

申请日：2000-05-12

申请人： Sheldon K. Meredith

发明人： Sheldon K. Meredith

IPC分类号： G01R124

CPC分类号： G01R27/06 ,  G01R29/10

摘要： A method and apparatus for calibrating an antenna apparatus and testing an antenna connected thereto is provided. The calibration is conducted without an antenna connected to establish a baseline return loss calibration coefficient. Thereafter, after an antenna is connected, a test may be conducted to measure the performance of the antenna on the antenna site apparatus. The calibration process includes measuring a leakage signal, measuring an average of the magnitude of a ripple output of the reflection signal over a frequency range to determine the baseline return loss calibration. Thereafter, if the antenna is connected and the test signal is again swept over frequency, then a new ripple factor is determined for the antenna and a new mean output voltage for Vant is determined. By comparing the new average output voltage for Vant and the baseline return loss calibration, one can determine information about the performance of the antenna.

摘要翻译： 提供了一种用于校准天线装置并测试与其连接的天线的方法和装置。 在不连接天线的情况下进行校准，以建立基线回波损耗校准系数。 此后，在连接天线之后，可以进行测试以测量天线位置装置上的天线的性能。 校准过程包括测量泄漏信号，在频率范围内测量反射信号纹波输出的幅度的平均值，以确定基线回波损耗校准。 此后，如果天线被连接并且测试信号再次扫过频率，则确定天线的新纹波因数，并且确定Vant的新的平均输出电压。 通过比较Vant的新的平均输出电压和基线回波损耗校准，可以确定有关天线性能的信息。

公开(公告)号：US06191744B1

公开(公告)日：2001-02-20

申请号：US09406462

申请日：1999-09-27

申请人： Jeffrey Snow ,  Kenneth Thompson

发明人： Jeffrey Snow ,  Kenneth Thompson

IPC分类号： G01R124

CPC分类号： H01Q3/08 ,  G01R29/10

摘要： A probe movement apparatus for spherical near-field antenna testing moves a probe (22) over a spherical measurement surface or path by two bent cantilevered arms (14 and 18). A positioner (12 or 16) rotates each arm (14 and 18). An elevation positioner (16) is mounted on the tip of an azimuth arm (12) The azimuth positioner (12) is mounted on a base (10). The rotation axes of the two positioners (12 and 16) intersect and are orthogonal. The axes intersection point defines the center of the measurement sphere. The antenna (32) is mounted within the measurement sphere on an anti-spin bearing (26) on the azimuth arm (14) centered above the azimuth positioner (12). A shaft (28) connects to the anti-spin bearing, extends down though the azimuth arm (14) and positioner (12) and connects to an anti-spin positioner (30). The anti-spin positioner (30) attaches to the base (10) and holds the antenna (32) stationary. Optionally, the anti-spin positioner (30) may rotate the antenna (32) to check for and minimize the effect of radio frequency reflections.

摘要翻译： 用于球形近场天线测试的探测移动装置通过两个弯曲的悬臂（14和18）将探针（22）移动到球形测量表面或路径上。 定位器（12或16）旋转每个臂（14和18）。 仰角定位器（16）安装在方位角臂（12）的尖端上。方位定位器（12）安装在基座（10）上。 两个定位器（12和16）的旋转轴线相交且正交。 轴相交点定义测量球的中心。 天线（32）安装在测量球体内的位于方位定位器（12）上方的方位角臂（14）上的防旋转轴承（26）上。 轴（28）连接到防旋转轴承，通过方位角臂（14）和定位器（12）向下延伸并连接到防旋转定位器（30）。 防旋转定位器（30）附接到基座（10）并将天线（32）保持静止。 可选地，抗旋转定位器（30）可以旋转天线（32）以检查并最小化射频反射的影响。

公开(公告)号：US06720928B2

公开(公告)日：2004-04-13

申请号：US10279080

申请日：2002-10-24

申请人： Yukihiro Honma

发明人： Yukihiro Honma

IPC分类号： G01R124

CPC分类号： H01Q3/08

摘要： A laser pointer and an image sensor are employed as one measuring system, and two measuring systems are arranged such that a laser beam is irradiated in the opposite direction. One laser pointer and one image sensor are arranged on the measuring reference portion, and also One laser pointer and one image sensor are arranged on the measured portion. The parallel displacement &Dgr;X and the inclination &thgr; of the measured portion are calculated separately based on measured results obtained by these two measuring systems.

摘要翻译： 使用激光指示器和图像传感器作为一个测量系统，并且布置两个测量系统，使得激光束沿相反方向照射。 一个激光指示器和一个图像传感器布置在测量基准部分上，并且在测量部分上还设置有一个激光指示器和一个图像传感器。 基于由这两个测量系统获得的测量结果，单独计算测量部分的平行位移DeltaX和倾斜度θ。

公开(公告)号：US06329953B1

公开(公告)日：2001-12-11

申请号：US09676590

申请日：2000-09-29

申请人： Patrick D. McKivergan

发明人： Patrick D. McKivergan

IPC分类号： G01R124

CPC分类号： G01R29/10 ,  H01Q1/245

摘要： A system and method for rating the performance of competing antennas under various environmental conditions is herein disclosed. The present invention provides a method to statistically characterize antenna performance, relating actual operating conditions to the likelihood of completing a reliable wireless communication link within a desired confidence level. The invention provides a system and method to predict antenna performance based upon actual usage condition factors, such as power needed for transmitting, and radiation absorption by a user, relative to the angle of orientation between the antenna under test and a corresponding antenna on the opposite side of a wireless communication link.

摘要翻译： 本文公开了一种在各种环境条件下评估竞争天线的性能的系统和方法。 本发明提供了一种用于统计表征天线性能的方法，将实际操作条件与在期望置信水平内完成可靠无线通信链路的可能性相关联。 本发明提供了一种系统和方法，用于基于实际使用条件因素来估计天线性能，所述实际使用条件因素例如用于发射所需的功率和用户的辐射吸收相对于被测天线之间的取向角和相对的天线 无线通信链路的一侧。

公开(公告)号：US06297780B1

公开(公告)日：2001-10-02

申请号：US09295388

申请日：1999-04-21

申请人： Akihiro Kirisawa

发明人： Akihiro Kirisawa

IPC分类号： G01R124

CPC分类号： H01Q11/08 ,  H01Q1/362 ,  H01Q3/24 ,  H04B7/0602

摘要： In a mobile apparatus for communication with a satellite, a plurality of antennas having different directivities from each other are provided. A selector circuit is connected between a transmitter circuit and the antennas to select and connect one of the antennas to the transmitter circuit. A control section controls the selector circuit in accordance with a reflected power detected from one of the antennas.

摘要翻译： 在与卫星通信的移动装置中，提供了彼此具有不同方向性的多个天线。 选择器电路连接在发射机电路和天线之间，以选择并将天线中的一个连接到发射机电路。 控制部根据从天线之一检测的反射功率来控制选择器电路。

公开(公告)号：US06236371B1

公开(公告)日：2001-05-22

申请号：US09361479

申请日：1999-07-26

申请人： Brian C. Beck

发明人： Brian C. Beck

IPC分类号： G01R124

CPC分类号： G01R31/2822 ,  G01R31/2837 ,  H04B17/20

摘要： A system and method tests the frequency response of a linear time-invariant unit-under-test, such as an antenna. A test signal is generated at a selected frequency and modulated with a spread spectrum input excitation signal to produce a broadband test signal that is substantially wider than the bandwidth of a device-under-test. The test signal is transmitted from one of either the unit-under-test or test device to a responsive test device or unit-under-test. The test signal is demodulated by mixing an input excitation signal that is delayed and increased in steps, such that the difference in time generates an estimate of the impulse response of the unit-under-test. The test signal is correlated and integrated to filter out unwanted interference and reflections.

摘要翻译： 系统和方法测试线性时变不变单位下测试的频率响应，例如天线。 以选定的频率产生测试信号并用扩展频谱输入激励信号进行调制，以产生比被测设备的带宽大得多的宽带测试信号。 测试信号从测试单元或测试设备之一传输到响应测试设备或未测试单元。 通过混合延迟并逐步增加的输入激励信号来解调测试信号，使得时间差产生对被测单位的脉冲响应的估计。 测试信号相关并集成，以滤除不需要的干扰和反射。