公开(公告)号：US06456228B1

公开(公告)日：2002-09-24

申请号：US09500305

申请日：2000-02-08

申请人： Magnus Granhed ,  Peter Fuks ,  Gunnar Larsson ,  Anders Rehn

发明人： Magnus Granhed ,  Peter Fuks ,  Gunnar Larsson ,  Anders Rehn

IPC分类号： G01S1375

CPC分类号： H01Q1/2225 ,  H01Q1/22 ,  H01Q1/38 ,  H01Q13/106

摘要： A passive transponder comprises an antenna (1, 2) in the form of a metal body with two main surfaces and a diode (3) connected between the main surfaces and a dielectric (10) surrounding the antenna. A characteristic of the invention is that the impedance of the antenna is adapted to the impedance of the diode by matching unit (13, 14). A transmission line (8) is used as the matching unit. Another characteristic for the invention is that the transmission line is surrounded by a dielectric (10) made of plastic. Yet another characteristic of the invention is that the antenna is surrounded by a dielectric made of plastic which reduces the influence of the surroundings on the near field of the antenna.

摘要翻译： 无源应答器包括具有两个主表面的金属体形式的天线（1,2）和连接在主表面之间的二极管（3）和围绕天线的电介质（10）。 本发明的特征在于天线的阻抗通过匹配单元（13,14）适应于二极管的阻抗。 传输线（8）用作匹配单元。 本发明的另一个特征是传输线被由塑料制成的电介质（10）包围。 本发明的另一个特征是天线被由塑料制成的电介质包围，这减少了周围环境对天线近场的影响。