公开(公告)号：US06703965B1

公开(公告)日：2004-03-09

申请号：US10089592

申请日：2002-03-28

申请人： Su Guang Ming ,  Wen Xiao Ping ,  Sun Ying Xin ,  Ng Yew Hoe Joseph

发明人： Su Guang Ming ,  Wen Xiao Ping ,  Sun Ying Xin ,  Ng Yew Hoe Joseph

IPC分类号： G01S728

CPC分类号： G01S13/56 ,  G01S7/032

摘要： The present motion detector unit effectively suppresses harmonic frequencies and is cost-effective to build. The motion detector unit includes a main casing which houses the main microwave circuit board (3). Enclosing the casing and the circuit board (3) is a cover. An antenna circuit board is attached to the bottom side of the main casing. The cover has partitioning walls at the bottom side of the cover which press against the main microwave circuit board (3) when the cover is enclosed over the casing. The circuit on the main microwave circuit board (3) includes a microwave oscillator for producing an oscillatory signal. The oscillator is coupled to a ground and to a filter which is a low-pass filter with a relatively wide stop bandwidth. The filter is then coupled to a transmitting antenna. A power supply is routed through the transmission antenna and provides DC voltage to the microwave oscillator. The oscillator is further coupled to a mixer. The mixer is coupled to a filter which is in turn coupled to a receiving antenna.

摘要翻译： 本运动检测器单元有效地抑制了谐波频率并且构建成本有效。 运动检测器单元包括容纳主微波电路板（3）的主壳体。 封闭外壳和电路板（3）是一个盖子。 天线电路板安装在主壳体的底侧。 当盖子封闭在外壳上时，盖子在盖子的底侧具有压靠主微波电路板（3）的分隔壁。 主微波电路板（3）上的电路包括用于产生振荡信号的微波振荡器。 振荡器耦合到接地和滤波器，滤波器是具有相对宽的停止带宽的低通滤波器。 然后将滤波器耦合到发射天线。 电源通过发射天线布线，并向微波振荡器提供直流电压。 振荡器进一步耦合到混频器。 混频器耦合到滤波器，滤波器又耦合到接收天线。