Rfid reader and transponders
AssigneeReed Licensing Pty Ltd
InventorsNemai Karmakar, Md Aminul Islam, Yixian Yap, Akm Azad, Klaus Lorentschitsch
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Abstract
A passive and chipless RFID transponder comprising: a substrate; and at least one planar patch on the substrate, the patch including a slot resonator of with radial conductive strips disposed at points around the slot resonator.
Claims17
A passive and chipless radio frequency identification (RFID) transponder comprising:
- a substrate;
- and
- at least one planar patch on the substrate, the patch including a slot resonator of with radial conductive strips disposed at points around the slot resonator.
A passive and chipless radio frequency identification (RFID) transponder comprising:
- a substrate;
- and
- at least one planar patch on the substrate, the patch including parallel pairs of horizontal slot resonators in opposing quadrants and having lengths Li, i=1−n, that decrease towards the center of the patch:
- and parallel pairs of vertical slot resonators in opposing quadrants and having lengths Wi, i=1−n, that decrease towards the center of the patch.
A passive and chipless radio frequency identification (RFID) transponder comprising:
- a substrate;
- and
- a plurality of planar antennas with respective selected resonant frequencies, wherein each antenna includes a first portion in conductive communication with both a second portion and a third portion, and wherein the second portion and the third portion are separated by a non-conductive slot.
A radio frequency identification (RFID) reader, comprising:
- a transmit antenna configured to transmit RF interrogation signals to a passive and chipless RFID transponder;
- a receive antenna configured to receive backscattered signals in response from the RFID transponder;
- an RF module including an RF transmitter configured to generate the RF interrogation signals for the transmit antenna and an RF receiver configured to amplify and down convert the signals received by the receive antenna;
- and
- a digital module including a digital controller configured to control the RF transmitter and a digital signal processor (DSP) configured to process the down converted signals from the RF receiver to extract a unique identification (ID) code of the RFID transponder.
A reader for reading a transponder, wherein the transponder comprises a passive and chipless radio frequency identification (RFID) transponder comprising a substrate, and at least one planar patch on the substrate, the patch including a slot resonator of with radial conductive strips disposed at points around the slot resonator.
Dependencies are inferred from the claim text.