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1. 发明授权

US4740790A Antenna polarization measuring methods 失效
标题翻译：天线极化测量方法
公开(公告)号：US4740790A
公开(公告)日：1988-04-26
申请号：US775364
申请日：1985-09-12
申请人： Doren W. Hess, Jr. , John R. Jones
发明人： Doren W. Hess, Jr. , John R. Jones
IPC分类号： G01R23/16 , G01R29/10 , H01Q21/06 , H01Q21/24 , H04B7/10
CPC分类号： G01R23/16 , G01R29/10
摘要： Method for measuring polarization of antennas utilizing three-antenna methods and far-field scanning techniques where the measured data is processed via digital Fourier transform. In one method, the normalized received phasor voltage for transmission between each of three antennas measured pairwise is digitally recorded as a continuously sampled function of relative roll angle between the antennas as one of the antennas is rolled in a continuous manner. The recorded data is digitally processed via a one-dimensional Discrete Fourier Transform to yield transformed quantities relating to the polarization of the antennas under test. From these quantities, standard polarization parameters including the circular polarization ratio, axial ratio, tilt angle and sense of the electric field polarization ellipse of each antenna may be obtained. In another method, the antenna in each pair which is not continuously rotated is rotated in incremental fashion while the normalized received phasor voltage for transmission between each pair of antennas is digitally recorded. The recorded data for this second method is digitally processed via a two-dimensional Fast, Discrete or other Fourier transform. This step/scan procedure further compensates for test range ambient and reflected noise and for transmitter and receiver RF path variations compared to the single scan procedure of the first method.
摘要翻译：利用三天线方法和远场扫描技术测量天线极化的方法，其中通过数字傅里叶变换处理测量数据。在一种方法中，成对测量的三个天线中的每个天线之间的传输的归一化接收相量电压被数字地记录为天线之间的相对侧倾角的连续采样函数，因为天线之一以连续的方式滚动。记录的数据通过一维离散傅里叶变换进行数字处理，以产生与被测天线的极化相关的变换量。根据这些量，可以获得包括圆极化比，轴比，倾斜角和每个天线的电场偏振椭圆的感觉的标准极化参数。在另一种方法中，每一对中不连续旋转的天线以递增的方式旋转，同时数字地记录每对天线之间用于传输的归一化的接收相量电压。用于该第二种方法的记录数据通过二维快速，离散或其他傅里叶变换进行数字处理。该步骤/扫描过程进一步补偿了测试范围环境和反射噪声以及与第一种方法的单次扫描过程相比发射机和接收机RF路径变化。

2. 发明授权

US06185232B2 Wavelength modulated laser for minimizing effects of Rayleigh backscattering 失效
标题翻译：波长调制激光，用于最小化瑞利后向散射的影响
公开(公告)号：US06185232B2
公开(公告)日：2001-02-06
申请号：US09107428
申请日：1998-06-30
申请人： Doren W. Hess, Jr. , Rezin E. Pidgeon, Jr.
发明人： Doren W. Hess, Jr. , Rezin E. Pidgeon, Jr.
IPC分类号： H01S310
CPC分类号： H01S5/06258 , H01S5/0261 , H01S5/0612
摘要： An optical transmitter (405) includes a distributed feedback semiconductor laser (100) operated in a linear regime below a threshold associated with stimulated Brillouin scattering to generate an optical signal. A resistor (125) or other heater is physically coupled to the semiconductor laser (100), and a modulated current source (120) drives the resistor (125) with a triangle waveform (300), thereby varying an optical wavelength of the optical signal such that the optical signal and a double Rayleigh backscattered signal are characterized, at the optical receiver (410), by different optical frequencies. As a result, interference generated by Rayleigh backscattering is minimized at the optical receiver (410).
摘要翻译：光发射机（405）包括分布反馈半导体激光器（100），其以与受激布里渊散射相关联的阈值以下的线性状态操作，以产生光信号。电阻器（125）或其他加热器物理耦合到半导体激光器（100），并且调制电流源（120）用三角波形（300）驱动电阻器（125），从而改变光信号的光波长使得光信号和双瑞利反向散射信号在光接收器（410）处被不同的光频率表征。结果，由Rayleigh后向散射产生的干扰在光接收器（410）处被最小化。

3. 发明授权

US5311440A Methods and apparatus for correction of cable variations 失效
标题翻译：电缆变化校正方法和装置
公开(公告)号：US5311440A
公开(公告)日：1994-05-10
申请号：US801052
申请日：1991-12-03
申请人： Doren W. Hess, Jr.
发明人： Doren W. Hess, Jr.
IPC分类号： G01R27/28 , G01R29/10 , H04B9/00
CPC分类号： G01R29/10
摘要： Methods and apparatus are described for automatically determining correction factors for an electrical device to compensate for variations in the device as a result of mechanical and/or environmental influences, using a "three cable" method. A primary cable is used to conduct signals between electrical devices, for example a probe antenna and an antenna under test ("AUT") in an antenna test range. The primary cable is subjected to mechanical and/or environmental influences such as cable flexing and temperature changes. A first secondary cable and a second secondary cable are provided alongside the primary cable, and are subjected to similar environmental influences. A switching network connects the primary cable, the first secondary cable, and the second secondary cable in combinations to form three cable pairs during a calibration mode. A computing system determines insertion factors associated with the primary cable at a first time and a second time, using transfer functions associated with the cable pairs. A correction factor is determined using the insertion factors associated with the primary cable at the first time and the second time. The correction factor is applied to data transmitted via the primary cable during use of the primary cable in an antenna measurement mode, to compensate or adjust for the mechanical and/or environmental influences upon the primary cable.
摘要翻译：描述了使用“三电缆”方法自动确定电气设备的校正因子以补偿由于机械和/或环境影响而导致的设备变化的方法和设备。主电缆用于在天线测试范围内的电气设备（例如探头天线和被测天线（“AUT”）之间传导信号。主电缆受到机械和/或环境影响，如电缆弯曲和温度变化。第一辅助电缆和第二辅助电缆沿着主电缆设置并且受到类似的环境影响。开关网络在校准模式期间组合地连接主电缆，第一辅助电缆和第二辅助电缆以形成三个电缆线。计算系统使用与电缆对相关联的传递函数，在第一时间和第二时间确定与主电缆相关联的插入因子。使用与主电缆相关联的插入因子在第一次和第二次确定校正因子。校正因子被应用于在天线测量模式期间使用主电缆期间通过主电缆传输的数据，以补偿或调整对主电缆的机械和/或环境影响。

4. 发明授权

US4885593A Feeds for compact ranges 失效
标题翻译：饲料紧凑范围
公开(公告)号：US4885593A
公开(公告)日：1989-12-05
申请号：US908996
申请日：1986-09-18
申请人： Doren W. Hess, Jr. , John R. Jones
发明人： Doren W. Hess, Jr. , John R. Jones
IPC分类号： H01Q13/06
CPC分类号： H01Q13/06
摘要： Circular open ended waveguide feeds for compact ranges. Feeds according to the present invention employ smaller apertures for a given frequency of operation than a standard compact range feed. According to a first embodiment of the invention, a circular open ended waveguide feed is constructed to operate with its lowest desired frequency of operation at approximately 1.01 times the cutoff frequency. A second embodiment includes a circular open-ended waveguide loaded with ridges to lower the cutoff frequency further and thus further reduce aperture size for a given bandwidth to radiate a broader beamwidth.
摘要翻译：圆形开口波导馈电，适用于紧凑型。根据本发明的进料对于给定的操作频率使用比标准紧凑范围进料更小的孔。根据本发明的第一实施例，圆形开口波导馈电被构造成以其最低期望的操作频率在截止频率的大约1.01倍下操作。第二实施例包括装载有脊的圆形开口波导，以进一步降低截止频率，从而进一步减小给定带宽的孔径大小以辐射更宽的波束宽度。

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