Multiple beam antenna feed
Radio-frequency identification system
Retrodirective interrogation responsive system
Microwave identification system
Method of making a high voltage rectifier for an integrated circuit chip Patent #: 5622886
ApplicationNo. 968381 filed on 11/12/1997
US Classes:342/42, RADAR TRANSPONDER SYSTEM342/51, Radar transponder only342/175WITH PARTICULAR CIRCUIT
ExaminersPrimary: Sotomayor, John B.
Attorney, Agent or Firm
International ClassG01S 013/76
Foreign Application Priority Data1996-11-14 SG
AbstractAn RF identification transponder comprises a substrate layer, and an array of M*N antenna elements formed on the substrate layer, where M and N are integers. The antenna elements have a common predetermined resonant frequency fr. The resonant frequency of the transponder's antenna element array allows it to be identified apart from other transponders, each having an antenna element array with a different resonant frequency.