公开(公告)号：US20100066608A1

公开(公告)日：2010-03-18

申请号：US12462632

申请日：2009-08-06

申请人： Daniel McCarthy ,  Dean Paschen ,  Lary Eichel ,  Frank Pratt

发明人： Daniel McCarthy ,  Dean Paschen ,  Lary Eichel ,  Frank Pratt

IPC分类号： G01S3/16 ,  G01S13/90

CPC分类号： G01S13/90 ,  G01S7/2813

摘要： Method and apparatus for minimizing antenna backside signal response and ambiguity in low frequency applications, particularly low frequency synthetic aperture radar (SAR). Various time delay elements are selectably switched into the signal path so as to cause a null to be placed in the antenna response pattern in the direction of undesired radar returns. The means for selectably switching may be dithered so as to introduce modulation onto the undesired radar return to aid in the discrimination and removal of the undesired radar return from the SAR image during post processing.

摘要翻译： 用于最小化低频应用中的天线背侧信号响应和模糊性的方法和装置，特别是低频合成孔径雷达（SAR）。 可选择地将各种时间延迟元件切换到信号路径中，以便在不期望的雷达返回的方向上将空值放置在天线响应模式中。 用于可选地切换的装置可以被抖动以便将调制引入到不期望的雷达返回上，以帮助在后处理期间从SAR图像辨别和去除不期望的雷达返回。

公开(公告)号：US08013792B2

公开(公告)日：2011-09-06

申请号：US12462632

申请日：2009-08-06

申请人： Daniel McCarthy ,  Dean Paschen ,  Lary Eichel ,  Frank Pratt

发明人： Daniel McCarthy ,  Dean Paschen ,  Lary Eichel ,  Frank Pratt

IPC分类号： H01Q3/26 ,  H01Q3/00

CPC分类号： G01S13/90 ,  G01S7/2813

摘要： Method and apparatus for minimizing antenna backside signal response and ambiguity in low frequency applications, particularly low frequency synthetic aperture radar (SAR). Various time delay elements are selectably switched into the signal path so as to cause a null to be placed in the antenna response pattern in the direction of undesired radar returns. The means for selectably switching may be dithered so as to introduce modulation onto the undesired radar return to aid in the discrimination and removal of the undesired radar return from the SAR image during post processing.

摘要翻译： 用于最小化低频应用中的天线背侧信号响应和模糊性的方法和装置，特别是低频合成孔径雷达（SAR）。 可选择地将各种时间延迟元件切换到信号路径中，以便在不期望的雷达返回的方向上将空值放置在天线响应模式中。 用于可选地切换的装置可以被抖动以便将调制引入到不期望的雷达返回上，以帮助在后处理期间从SAR图像辨别和去除不期望的雷达返回。

公开(公告)号：US06268827B1

公开(公告)日：2001-07-31

申请号：US09430051

申请日：1999-10-29

申请人： Dean Paschen ,  Dan Becker ,  Gary Rait ,  Paul Burlingame

发明人： Dean Paschen ,  Dan Becker ,  Gary Rait ,  Paul Burlingame

IPC分类号： H01Q322

CPC分类号： H01Q21/0025 ,  H01Q3/22

摘要： The present invention provides a method and apparatus for carrying signals having different frequencies in a space-deployed antenna system. When the antenna system is in a first mode, DC power, command information and RF signals (1) are multiplexed via a multiplexer, (2) propagate along a RF transmission line and (3) are appropriately demultiplexed by a demultiplexer associated with each T/R module. Similarly, when the antenna system is in a second mode, telemetry data and RF signals (1) are multiplexed via a multiplexer, (2) propagate along the RF transmission line and (3) are appropriately demultiplexed by a demultiplexer at a driver stage. By using the RF transmission lines associated with each T/R module to deliver (1) DC power, (2) command data and (3) RF signals in the first mode and to deliver (1) telemetry data and (2) RF signals in the second mode, the DC power and command/telemetry wire harnesses (and their respective conductors) may be eliminated. Thus, the overall weight of the antenna system may be reduced. Furthermore, deployment risks may be reduced. Finally, the overall cost of the antenna system may be reduced.

摘要翻译： 本发明提供一种在空间部署的天线系统中传送具有不同频率的信号的方法和装置。 当天线系统处于第一模式时，通过多路复用器对DC电力，命令信息和RF信号（1）进行复用，（2）沿着RF传输线传播，（3）由与每个T相关联的解复用器 / R模块。 类似地，当天线系统处于第二模式时，遥测数据和RF信号（1）经由多路复用器复用，（2）沿着RF传输线传播，并且（3）在驱动阶段被解复用器适当解复用。 通过使用与每个T / R模块相关联的RF传输线路（1）直流电源，（2）命令数据和（3）RF信号在第一模式中传送（1）遥测数据和（2）RF信号 在第二模式中，可以消除直流电力和指令/遥测线束（及其各自的导线）。 因此，可以减小天线系统的整体重量。 此外，可能会降低部署风险。 最后，天线系统的整体成本可能会降低。