Patent ID: 9626537
Date: 2017-04-18
CPC Classifications: G06K

Claim:
1. A read infrastructure for radio frequency identification (RFID) devices comprising: a distributed read structure for proximity coupling with RFID devices within one wavelength of radiation emitted by the read structure, the distributed read structure comprises a series of conductive strips or patterns on at least one surface of a display device, the conductive strips or patterns are configured to produce a radio frequency (RF) field between conductors for detecting the RFID device; and a coupler, electrically connected to the read structure, for proximity coupling to an RFID reader wherein the RFID reader includes a first antenna and a second antenna such that either the first or second antenna is used for proximity coupling and whichever of the first and second antenna that is not used for proximity coupling is used for far field coupling and the RFID reader transmits on both the first and second antennas and utilizes the first or second antenna with a lowest return loss, such that the RFID reader transmits for proximity coupling using the first or second antenna with an acceptable return loss for proximity coupling; wherein the coupler includes a microstrip and interconnections from sides of the microstrip are used to connect the conductive strips or patterns to the distributed read structure.