Passive Transponder and an Item with a Passive Transponder
First Claim
1. A passive transponder, comprising:
- an antenna having two electrically conductive parts, wherein each electrically conductive part of the antenna comprises a flexible conductive thread having a first end and a second end;
a diode electrically connected to a first end of the flexible conductive thread of the antenna; and
a transmission line connected to the antenna and to the diode, wherein the transmission line is adapted to match the impedance of the diode to an impedance of the antenna; and
the passive transponder, when hit by radio frequency (RF) power of a first frequency f1, retransmits RF power of a harmonic frequency fh.
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Abstract
A passive transponder includes an antenna having two electrically conductive parts; a diode connected to the antenna; and a transmission line connected to the antenna and to the diode. The transmission line is adapted to match the impedance of the diode to an impedance of the antenna. The passive transponder, when hit by radio frequency (RF) power of a first frequency f1, retransmits RF power of a harmonic frequency fh. Each electrically conductive part of the antenna includes a flexible conductive thread having a first end and a second end, and the diode is connected to a first end of the flexible conductive thread. An item, such as a fabric or adhesive label, includes at least one passive transponder.
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Citations
22 Claims
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1. A passive transponder, comprising:
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an antenna having two electrically conductive parts, wherein each electrically conductive part of the antenna comprises a flexible conductive thread having a first end and a second end; a diode electrically connected to a first end of the flexible conductive thread of the antenna; and a transmission line connected to the antenna and to the diode, wherein the transmission line is adapted to match the impedance of the diode to an impedance of the antenna; and
the passive transponder, when hit by radio frequency (RF) power of a first frequency f1, retransmits RF power of a harmonic frequency fh. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification