Abstract
A method of increasing a RFID tag reading range and a device for carrying out the same, said method comprising placing the RFID tag in an electrically polarizable medium, which may be water or another polarizable liquid or a polarizable amorphous plastic or melt. The device comprises a capsule into which the RFID tag is mounted. Then, the capsule is filled with an electrically polarizable medium.
Claims
1. A method of extending a RFID tag reading range, characterized in that a RFID tag is placed in an electrically polarizable medium.
2. The method according to claim 1, characterized in that said polarizable medium is water.
3. The method according to claim 1, characterized in that said polarizable medium is a liquid or amorphous plastic or melt.
4. A device for extending a RFID tag reading range comprising a scanning device and a FRID tag, characterized in that a RFID tag is placed in a capsule filled with an electrically polarizable medium.
5. The device according to claim 4, characterized in that said polarizable medium is water.
6. The device according to claim 4, characterized in that said polarizable medium is a liquid or amorphous plastic or melt.
7. The device according to claim 4, characterized in that said capsule is made of a dielectric material.
Description
[0054] The following is a description of the attached drawings.
[0055] FIG. 1 is a general view of a device, where [0056] 1—scanning device, [0057] 2—scanning device antenna, [0058] 3—RFID tag, [0059] 4—RFID tag built-in receiving antenna, [0060] 5—RFID tags electronic unit, [0061] 6—capsule with a polarizable medium, [0062] 8—scanning sinusoidal electromagnetic wave, [0063] 8a—backward electromagnetic wave modulated by the RFID tag.
[0064] FIG. 2 is a general view of a capsule with a RFID tag, where [0065] 1—RFID tag, [0066] 4—RFID tag built-in receiving antenna, [0067] 5—RFID tags electronic unit, [0068] 6—capsule with a polarizable medium, [0069] 7—water as a polarizable medium.
[0070] FIG. 2a is a general view of a capsule with a RFID tag, where [0071] 3—RFID tag, [0072] 4—RFID tag built-in receiving antenna, [0073] 5—RFID tags electronic unit, [0074] 6—capsule with a polarizable medium, [0075] 9—viscous fluid or melt as a polarizable medium.
[0076] FIG. 3 is a general view of a RFID tag, where [0077] 3—RFID tag, [0078] 4—RFID tag built-in receiving antenna, [0079] 5—RFID tags electronic unit.
[0080] FIG. 4 is a general view of a capsule with polarizable medium, where [0081] 6—capsule with a polarizable medium, [0082] 10—electric dipole modulating a RFID tag built-in antenna.
[0083] FIG. 4a is a general view of a capsule with water molecules, where [0084] 6—capsule with a polarizable medium, [0085] 7a—water molecules in a capsule without electromagnetic field.
[0086] FIG. 4b is a general view of a capsule with water molecules, where [0087] 6—capsule, [0088] 7 b—water molecules in a capsule with electromagnetic field.
[0089] FIG. 4c is a general view of a capsule with water molecules, where [0090] 6—capsule, [0091] 7b—water molecules in a capsule with electromagnetic field, [0092] 10—electric dipole modulating a RFID tag built-in antenna.
[0093] An embodiment of the invention is described below with reference to the attached drawings.
[0094] The proposed method comprises placing a RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a) in water 7 (FIG. 2), viscous liquid, amorphous plastic 9 (FIG. 2a) or melt with an electrically polar molecular structure.
[0095] Water 7 (FIG. 2) or viscous liquid, amorphous plastic 9 (FIG. 2a) or melt are placed in a capsule 6 (FIG. 1, FIG. 2, FIG. 2a) with the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3).
[0096] The RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a) is attached to items or objects to be accounted or tracked.
[0097] When tags 3 (FIG. 1, FIG. 2, FIG. 2a) are detected within the reading zone of a scanning device 1 (FIG. 1), a signal of the scanning device 1 (FIG. 1) is modulated and a resulting electromagnetic response of the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a) is read by the scanning device 1 (FIG. 1) able not only to generate electromagnetic waves but also to receive the same.
[0098] An electromagnetic signal is generated by the scanning device 1 (FIG. 1) with a circularly polarized directional antenna 2 (FIG. 1) in the same frequency range as that of a built-in receiving antenna 4 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) of the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3).
[0099] The receiving antenna 4 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) of the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a) excited by a sinusoidal electromagnetic wave 8 (FIG. 1) of the scanning device 1 (FIG. 1) begins to emit a reflected wave 8a (FIG. 8a) at the same frequency as the scanning device 1 (FIG. 1) carrier frequency.
[0100] The sinusoidal electromagnetic wave 8 (FIG. 1) of the scanning device 1 (FIG. 1) not only excites the antenna 4 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) of the FRID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) comprising herein physically the main electric dipole 10 (FIG. 4) but also aligns the electric dipole molecules of the polarizable medium 7a, 7b (FIG. 4a, FIG. 4b, FIG. 4c) along the scanning sinusoidal electromagnetic wave 8 (FIG. 1).
[0101] The energy of the electromagnetic field of the scanning device 1 (FIG. 1) received by the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) is transmitted to a electronic unit 5 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) chip with the RFID tag 3 memory (FIG. 1, FIG. 2, FIG. 2a, FIG. 3), which reads information from its memory and modulates a backward electromagnetic wave 8a (FIG. 1) reflected by the built-in receiving antenna 4 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) of the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) by low frequency, as compared to the scanning device carrier frequency 1 (FIG. 1), oscillations encoding the information having been read. The modulated reflected wave 8a (FIG. 1) with information is received and processed by the scanning device 1 (FIG. 1). In this case, there is observed a multiple increase in the reading range of information from the RFID tag 3 (FIG. 1, FIG. 2, FIG. 2a, FIG. 3) by the scanning device 1 (FIG. 1).
