公开(公告)号：US5258762A

公开(公告)日：1993-11-02

申请号：US598662

申请日：1991-10-28

申请人： Philippe Cabon ,  Jean-Francois Habigand

发明人： Philippe Cabon ,  Jean-Francois Habigand

IPC分类号： H04B1/40 ,  G01S7/02 ,  G01S13/76

CPC分类号： G01S13/767 ,  G01S13/762 ,  G01S7/024

摘要： Identification system constituted by an interrogation station or interrogator 1 itself formed by a radio frequency wave transceiver and preferably on an ultra frequency wave length 5, and, on the other hand, by a responder unit 2 adapted to receive the wave and to re-emit (echo) it following the given coded modulation to the responder unit. The interrogator is adapted to receive this echoing wave 11 and to demodulate it in order to derive the identification code therefrom. The interrogator has an emission antenna adapted to emit an inquiry signal constituted by a radio wave emitted in plane polarization. The responder unit has two adjacent antennas, respectively, for the reception of the inquiry wave and for its re-emission (echo) after modulation. The two antennas are of the circular polarization type and each functioning in a direction of rotation of the polarization opposite with respect to each other. This allows a differentiation between the emission inquiry signal and the response signal, since the inquiry signal wave is received by a circular polarization-type antenna of the responder unit according to a first rotation direction of the polarization. The responder unit is adapted to re-emit a modulated response signal constituted by a radio wave of the same kind as the inquiry wave of circular polarization-type according to a second rotation direction of the polarization in the opposite direction to the first rotation direction.

摘要翻译： PCT No.PCT / FR90 / 00139 Sec。 371日期1991年10月28日 102（e）日期1991年10月28日PCT 1990年2月27日PCT PCT。 WO90 / 10200 PCT出版物 1990年9月7日，由询问站或询问器1构成的识别系统本身由无线电频率收发器形成，优选地以超高频波长5形成，另一方面由适配器接收的响应单元2 并且将响应器单元按照给定的编码调制重新发射（回波）。 询问器适于接收该回波波11并对其进行解调，以便从中导出识别码。 询问器具有发射天线，其发射由平面偏振发射的无线电波构成的查询信号。 响应器单元分别具有两个相邻的天线，用于接收询问波和调制之后的再发射（回波）。 两个天线是圆偏振型的，并且每个天线都在相对于彼此相反的偏振的旋转方向上起作用。 由于响应器单元的圆偏振型天线根据偏振的第一旋转方向接收到查询信号波，所以能够区分发射查询信号和响应信号。 响应单元适于根据与第一旋转方向相反的方向的偏振的第二旋转方向，重新发射由与圆偏振型的查询波相同种类的无线电波构成的调制响应信号。