Flat loop antenna in a single plane for use in radio frequency i

Details Flat loop antenna in a single plane for use in radio frequency i Flat loop antenna in a single plane for use in radio frequency i

1998-11-05

2000-11-14

Ho, Tan

Communications: radio wave antennas

Antennas

High frequency type loops

343742, 343866, 340572, H01Q 1112

Patent

active

061476552

ABSTRACT:
A flat compact loop pattern provides an antenna for radio frequency identification tags with an enhanced voltage and/or current across two closely adjacently spaced terminals which are disposed on the same side of an insulating substrate. The amount of voltage supplied by the antenna loop to the RFID tag depends not only on the surface area included within the loop but also on the length of the planar loop or winding. The loop is comprised of a serpentine non-crossing wire disposed all on one side of the substrate, typically in the pattern of either a raster patterns in areas adjacent to one or more of the sides of the rectangular substrate, or a radial array of loops extending between the periphery and center of the substrate as the loops are azimuthally advanced around the center like spokes on a wheel or slices of pie.

REFERENCES:
patent: 3534372 (1970-10-01), Scheuerecker et al.
patent: 5760747 (1998-06-01), McCoy et al.
patent: 5798688 (1998-08-01), Schfield
patent: 5825291 (1998-10-01), Platt et al.
patent: 5914692 (1999-06-01), Bowers et al.

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