Radio frequency identification transponder having a high gain antenna configuration
First Claim
1. A radio frequency tag system comprising:
- at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, wherein the at least one high gain antenna further comprises a horn antenna comprising a waveguide portion and a horn portion.
3 Assignments
0 Petitions
Accused Products
Abstract
A radio frequency identification transponder has a high gain antenna for increased range. In an embodiment, the radio frequency transponder has a reflector to increase its operative range. A system of one or more reflectors is operatively associated with a transponder and may be formed out of any sort of radio frequency reflective material. The reflector system can enhance reception or transmission of radio waves by or from the transponder. The reflector system may also be used to provide for selective coupling of the radio frequency transponder with a base station, user- or vehicle-supported reader, or the like based on relative orientation. In addition, the reflector system may be used to selectively reflect particular radio waves. In another embodiment, the radio frequency transponder has a horn antenna providing increased gain and directivity. In yet another embodiment, the radio frequency transponder has a patch antenna providing increased gain and circular polarization. The patch antenna may further comprise a patch antenna array, a multi-layer patch or a dipole comprised of patch elements.
329 Citations
32 Claims
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1. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, wherein the at least one high gain antenna further comprises a horn antenna comprising a waveguide portion and a horn portion. - View Dependent Claims (2, 3)
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4. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, wherein the at least one reflector further comprises multiple reflectors for reflecting electromagnetic radiation to/from the at least one antenna.
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5. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, wherein said at least one reflector further comprises a shape comprising at least one of concave, cylindrical, corrugated, paraboloidal, ellipsoidal, hyperbolic, hyperboloidal, spherical, and spheroid.
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6. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, the at least one antenna further comprising a patch antenna, wherein the patch antenna further comprises a multi-layer patch antenna. - View Dependent Claims (7, 8)
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9. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, the at least one antenna further comprising plural patch antennas coupled together in a patch antenna array. - View Dependent Claims (10, 11, 12, 13)
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14. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled to the radio frequency integrated circuit; and
at least one reflector disposed proximally to said antenna, said reflector adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased, wherein the at least one high gain antenna further comprises a dipole antenna comprising separated first and second patch elements. - View Dependent Claims (15, 16, 17, 18)
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19. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit;
means for communicating signals to/from the radio frequency integrated circuit with high gain, wherein the communicating means further comprises a horn antenna, and wherein the horn antenna further comprises a waveguide portion and a horn portion, the at least one radio frequency integrated circuit being disposed externally of said waveguide portion and being coupled to an inductive coupling loop disposed within the waveguide portion.
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20. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit;
means for communicating signals to/from the radio frequency integrated circuit with high gain, wherein the communicating means further comprises a patch antenna, wherein the patch antenna further comprises a patch antenna array, wherein the patch antenna array further comprises a plurality of patches coupled to the at least one radio frequency integrated circuit; and
at least one impedance transformer coupled between the plurality of patches and the at least one radio frequency integrated circuit.
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21. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit; and
means for communicating signals to/from the radio frequency integrated circuit with high gain, wherein the communicating means further comprises a patch antenna, wherein the patch antenna further comprises a patch antenna array, wherein the patch antenna array further comprises a plurality of patches coupled to the at least one radio frequency integrated circuit, wherein the plurality of patches are each coupled to the at least one radio frequency integrated circuit on plural corresponding edges thereof to provide circular polarization.
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22. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit, at least one antenna coupled with the radio frequency integrated circuit, and at least one reflector disposed in proximity to the at least one antenna for reflecting electromagnetic radiation therefrom, said reflector being adapted for collecting and focusing energy from the electromagnetic field to/from said antenna so that the gain of said antenna is increased. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit;
at least one high gain antenna coupled to the radio frequency integrated circuit, said at least one high gain antenna including a multi-layer patch antenna, said multi-layer patch antenna including a feeder patch coupled to the at least one radio frequency integrated circuit and a radiating patch spaced from the feeder patch; and
a hybrid coupler coupled between the at least one radio frequency integrated circuit and the feeder patch, the hybrid coupler being coupled to the feeder patch at two points having a phase difference therebetween of 90°
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32. A radio frequency tag system comprising:
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at least one radio frequency integrated circuit;
means for communicating signals to/from the radio frequency integrated circuit with high gain, said means including a multi-layer patch antenna, said multi-layer patch antenna further comprising a feeder patch coupled to the at least one radio frequency integrated circuit and a radiating patch spaced from the feeder patch; and
a hybrid coupler coupled between the at least one radio frequency integrated circuit and the feeder patch, the hybrid coupler being coupled to the feeder patch at two points having a phase difference therebetween of 90°
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Specification