Patent ID: 8565677
Filing Date: 2013-10-22
Classification: B41J,G06K,H01Q,H04B

Abstract:
1. A near-field coupling device for coupling a transceiver with a targeted transponder, the near-field coupling device comprising: a ground plane; a dielectric substrate adjacent to the ground plane; a terminating load; a first conductive strip adjacent the dielectric substrate and extending from a port end to a loaded end and connected to the terminating load, the first conductive strip together with the ground plane forming a first coupling element having a length of one half-wavelength or multiple thereof; a second conductive strip adjacent the dielectric substrate and extending from the port end to the loaded end and connected to the terminating load, the second conductive strip together with the ground plane forming a second coupling element having a length of one half-wavelength or multiple thereof, wherein a first width of the first conductive strip is greater than a second width of the second conductive strip; and at least one switching element for selectively electrically connecting one or more of the first and second coupling elements with the transceiver, the connected coupling elements defining a total characteristic impedance of the connected coupling elements, in a first configuration of the switching element, the total characteristic impedance of the connected coupling elements is greater than the terminating load and, in a second configuration of the switching element, the total characteristic impedance of the connected coupling elements is less than the terminating load.