Radio-frequency identification (RFID) antenna, tags and communications systems using the same
First Claim
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1. A radio-frequency identification (RFID) tag antenna, comprising:
- a patterned conductive loop having a plurality of longitudinal conductive sections and a plurality of transverse conductive sections connecting to each end of the longitudinal conductive sections to serve as a matching network;
a pair of extended conductive arms electrically connected to the patterned conductive loop via two nodes, wherein the pair of extended conductive arms is a pair of tapered dipole antennas which width becomes thinner outwardly;
a bonding pad with an RFID chip disposed thereon, arranged at the central area between the pair of extended conductive arms; and
a pair of second conductive segments respectively connected to a thinner end of the pair of tapered dipole antennas, wherein the pair of second conductive segments are substantially perpendicular to the pair of tapered dipole antennas or are extended along any included angle, and wherein a length and a width of the pair of second conductive segments are dependent upon the impedance and frequency response of the RFID chip.
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Abstract
Radio-frequency identification (RFID) tag antenna, tags and communications systems using the same are presented. The RFID tag antenna includes a patterned conductive loop having a plurality of longitudinal conductive sections and a pair of transverse conductive sections connecting to each end of the longitudinal conductive sections to serve as a matching network. A pair of extended conductive arms is electrically connected to the patterned conductive loop via two nodes. A bonding pad with an RFID chip disposed thereon is arranged at the central area of the pair of extended conductive arms.
23 Citations
16 Claims
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1. A radio-frequency identification (RFID) tag antenna, comprising:
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a patterned conductive loop having a plurality of longitudinal conductive sections and a plurality of transverse conductive sections connecting to each end of the longitudinal conductive sections to serve as a matching network; a pair of extended conductive arms electrically connected to the patterned conductive loop via two nodes, wherein the pair of extended conductive arms is a pair of tapered dipole antennas which width becomes thinner outwardly; a bonding pad with an RFID chip disposed thereon, arranged at the central area between the pair of extended conductive arms; and a pair of second conductive segments respectively connected to a thinner end of the pair of tapered dipole antennas, wherein the pair of second conductive segments are substantially perpendicular to the pair of tapered dipole antennas or are extended along any included angle, and wherein a length and a width of the pair of second conductive segments are dependent upon the impedance and frequency response of the RFID chip. - View Dependent Claims (2, 3, 4, 5)
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6. A radio-frequency identification (RFID) tag device, comprising:
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a substrate; a patterned conductive loop disposed on the substrate, wherein the patterned conductive loop has a plurality of longitudinal conductive sections and a plurality of transverse conductive sections connecting to each end of the longitudinal conductive sections to serve as a matching network; a pair of extended conductive arms electrically connected to the patterned conductive loop via two nodes, wherein the pair of extended conductive arms is a pair of tapered dipole antennas which width becomes thinner outwardly; a bonding pad with an RFID chip disposed thereon, arranged at the central area of the pair of extended conductive arms; and a pair of second conductive segments respectively connected to a thinner end of the pair of tapered dipole antennas, wherein the pair of second conductive segments is substantially perpendicular to the pair of tapered dipole antennas or are extended along any included angle, and wherein a length and a width of the pair of second conductive segments are dependent upon the impedance and frequency response of the RFID chip. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A radio-frequency identification (RFID) communications system, comprising:
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an RFID tag device, comprising; a substrate; a patterned conductive loop disposed on the substrate, wherein the patterned conductive loop has a plurality of longitudinal conductive sections and a plurality of transverse conductive sections connecting to each end of the longitudinal conductive sections to serve as a matching network; a pair of extended conductive arms electrically connected to the patterned conductive loop via two nodes, wherein the pair of extended conductive arms is a pair of tapered dipole antennas which width becomes thinner outwardly; a pair of second conductive segments respectively connected to a thinner end of the pair of tapered dipole antennas, wherein the pair of second conductive segments are substantially perpendicular to the pair of tapered dipole antennas or are extended along any included angle, and wherein a length and a width of the pair of second conductive segments are dependent upon the impedance and frequency response of the RFID chip; a bonding pad with an RFID chip disposed thereon arranged at the central area between the pair of extended conductive arms; a read antenna sensing the RFID tag device; and a microprocessor processing and transmitting a signal sensed by the read antenna. - View Dependent Claims (15, 16)
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Specification