TRANSPONDER TAG WITH IMPROVED TOLERANCE TO PRESENCE OF NEAR-FIELD LOADING MATERIAL

摘要

A mixing inlay (102) is provided which includes a first radiating element (110a), a second radiating element (110b), and a non-linear mixing component (112) connected between adjacent end portions (114a, 114b) of the first and second radiating elements. The mixing inlay is configured to receive a first exciter signal having a first frequency and a second exciter signal having a second frequency, and in response, to radiate a mixing product signal produced by the mixing inlay from the first and second exciter signals. A conductive parasitic element (116) is disposed within a near field of the re-radiating transponder. A distance provided between the conductive parasitic element and the radiating elements is varied over the length of the conductive parasitic element to enhance a sideband signal generated by the mixing inlay.

主权项

1. A re-radiating transponder, comprising:
a first radiating element formed of a first planar conductive sheet aligned with a first plane and comprising a first leg of an antenna; a second radiating element formed of a second planar conductive sheet aligned with said first plane and comprising a second leg of said antenna; a non-linear mixing component connected between adjacent end portions of said first and second radiating elements, wherein said first radiating element, said second radiating element and said non-linear mixing component comprise a mixing inlay; and a conductive parasitic element positioned within a near field of said re-radiating transponder at a location spaced apart from said second radiating element and separated by a distance extending in a direction transverse to said first plane, wherein said distance is varied over a length of the conductive parasitic element; and wherein said mixing inlay is configured to receive a first exciter signal having a first frequency and a second exciter signal having a second frequency, and in response radiate a mixing product signal produced by said mixing inlay from said first and second exciter signal.