RFID tag including environmentally sensitive materials
First Claim
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1. An RFID device, comprising:
- a substrate;
an antenna structure having a first sheet of electrically conductive material including two parts and an elongated slot extending therebetween, the elongated slot having a length and one open end;
a wireless communications device coupled to the substrate; and
a non-ambient environmentally responsive material deposited within or across a portion of the elongated slot wherein the material alters the level of interaction between the two parts of the antenna structure in response to a change in an environmental factor and wherein the interaction between the two parts of the antenna varies along a length of the slot.
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Abstract
According to one exemplary embodiment, an RFID device is disclosed. The RFID device includes a substrate, an antenna structure having a first sheet of electrically conductive material including two parts and an elongated slot extending therebetween, a wireless communications device coupled to the substrate, and an environmentally-responsive material disposed within a portion of the elongated slot.
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Citations
19 Claims
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1. An RFID device, comprising:
- a substrate;
an antenna structure having a first sheet of electrically conductive material including two parts and an elongated slot extending therebetween, the elongated slot having a length and one open end;
a wireless communications device coupled to the substrate; and
a non-ambient environmentally responsive material deposited within or across a portion of the elongated slot wherein the material alters the level of interaction between the two parts of the antenna structure in response to a change in an environmental factor and wherein the interaction between the two parts of the antenna varies along a length of the slot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a substrate;
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11. An RFID device, comprising:
- a substrate;
an antenna structure having a sheet of electrically conductive material having a first part and a second part, the two parts being capacitively coupled together such that an operating parameter of the antenna structure varies in relation to an environmental condition wherein an elongated slot having a length that extends between the two parts and a non-ambient environmentally responsive material is desposited within a portion of the length of the elongated slot and the non-ambient environmentally responsive material alters the level of interaction between the two parts of the antenna structure in response to an environmental and wherein the interaction between the two parts of the antenna varies along a length of the slot; and
a wireless communications device coupled to the antenna structure.
- a substrate;
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12. A method of forming an RFID device, comprising:
depositing a first electrically conductive material on a substrate;
defining an elongated slot in the first electrically conductive material such that the conductive material includes two parts the elongated slot having a length and an end;
depositing a non-ambient environmentally responsive material at a location along the elongated slot wherein the material alters the level of interaction between the two parts in response to an environmental factor selected from the group including temperature, physical compression, bending, stretching air pressure, biological or chemical and wherein the interaction between the two parts of the antenna varies along a length of the slot; and
coupling a wireless communications device to the antenna structure.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
Specification