Calculated compensated magnetic antennas for different frequencies
OwnerJurgen Kastner, Hans-Juergen Pirch +1inventors
InventorsJurgen Kastner, Hans-Juergen Pirch, Markus Pretschuh
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Abstract
A compensated antenna array (108) and an RFID system including the compensated antenna array are disclosed. The antenna array includes a first antenna (208) and a second antenna (204) where the first antenna is positioned within the second antenna and overlaps itself at least one point (216) such that at least some induced current in the first antenna is offset by at least some induced current in the second antenna and such that at least some induced current in the second antenna is enhanced at the at least one point of overlap.
Claims15
An antenna array for an RFID reader comprising:
- a first antenna tuned to operate at a first carrier frequency;
- a second antenna tuned to operate at a second carrier frequency that is different from the first carrier frequency, wherein the first antenna is positioned within the second antenna and overlaps itself at least one point such that at least some induced current in the first antenna is offset by at least some induced current in the second antenna and such that at least some induced current in the second antenna is enhanced at the at least one point of overlap.
A multi-technology reader, comprising:
- an antenna array, the antenna array comprising a first antenna and a second antenna, the first antenna being positioned within the second antenna and overlapping itself at at least one point such that at least some induced current in the first antenna is offset by at least some induced current in the second antenna and such that at least some induced current in the second antenna is enhanced at the at least one point of overlap;
- and
- reader logic configured to operate the antenna array.
Dependencies are inferred from the claim text.