CN211427381U

CN211427381U - Asymmetric structure ultrahigh frequency RFID label

Info

Publication number: CN211427381U
Application number: CN202020569857.6U
Authority: CN
Inventors: 陆振君; 林超; 祁海波; 袁森淼
Original assignee: Shangyang Rfid Technology Yangzhou Co ltd
Current assignee: Shangyang Rfid Technology Yangzhou Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-09-04
Anticipated expiration: 2030-04-16

Abstract

And the ultrahigh frequency RFID label has an asymmetric structure. The utility model is suitable for a RFID label technical field especially relates to an asymmetric structure hyperfrequency RFID label improves. The ultrahigh frequency RFID label with the asymmetric structure is provided, wherein a label damage area is designed in the RFID label, so that the RFID label still has identification performance when being torn in the label damage area. The RFID antenna comprises an impedance matching ring, a label damage area and an antenna radiation area, wherein the RFID antenna is arranged on the dielectric substrate, the RFID chip is connected with the RFID antenna, the RFID antenna comprises the impedance matching ring, the label damage area and the antenna radiation area, the impedance matching ring is provided with an opening, the RFID chip is electrically connected with two ends of the opening of the impedance matching ring, the impedance matching ring is electrically connected with the label damage area through a bent line, and the label damage area is also electrically connected with the antenna radiation area. The utility model discloses tear the label in the label damaged area, the RFID label still can continue to be discerned, has compensatied the defect of traditional dipole antenna one-time use.

Description

Asymmetric structure ultrahigh frequency RFID label

Technical Field

The utility model is suitable for a RFID label technical field especially relates to an asymmetric structure hyperfrequency RFID label improves.

Background

Radio Frequency identification (rfid) technology is a communication technology that identifies a specific target by radio signals and reads and writes related data without establishing mechanical or optical contact between an identification system and the specific target. The ultrahigh frequency electronic identification tag has the advantages of strong penetrability, severe environment resistance, strong safety and confidentiality, reusability, large data memory capacity and the like, and is widely used.

Commercial ultrahigh frequency label in the existing market mostly adopts traditional dipole type structure, and the radio frequency label under this structure is symmetrical structure mostly, and the radio frequency label uses the frequency for disposable, in case the label tears to tear and just can not be read or read efficiency and reduce by a wide margin.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an asymmetric structure hyperfrequency RFID label designs the label damaged area in the RFID label, realizes that the RFID label tears to destroy in the label damaged area and still has the identification performance.

The utility model discloses a concrete technical scheme is:

the ultrahigh frequency RFID tag with the asymmetric structure comprises a dielectric substrate, an RFID antenna arranged on the dielectric substrate and an RFID chip connected with the RFID antenna, wherein the RFID antenna comprises an impedance matching ring, a tag damage area and an antenna radiation area, the impedance matching ring is provided with an opening, the RFID chip is electrically connected with two ends of the opening of the impedance matching ring, the impedance matching ring is electrically connected with the tag damage area through a bent line, and the tag damage area is also electrically connected with the antenna radiation area.

The folding times of the bending lines are more than 2.

And a virtual knife line is arranged on the medium substrate corresponding to the label damage area.

The label damage area is rectangular.

The width of the label damage area is 4-6 mm.

The opening direction of the impedance matching ring is located in the middle of the long edge of the impedance matching ring, and the long edge of the impedance matching ring is consistent with the polarization direction of the RFID antenna.

The RFID antenna size is 29mm x 55 mm.

The utility model discloses hyperfrequency RFID label based on asymmetric structure design, including impedance match ring, label damaged area and antenna radiation district, the impedance match ring is connected through the meander line and label damaged area electricity, and label damaged area still is connected with antenna radiation district electricity. The tag is torn in the tag damage area, the RFID tag can still be identified, and the defect that the traditional dipole antenna is used once is overcome.

Drawings

Figure 1 is a schematic structural diagram of the present invention,

fig. 2 is a schematic structural diagram of the utility model after tearing.

In the figure: 1-a dielectric substrate; 2-RFID antenna, 21-impedance matching loop, 211-opening, 22-label damage area, 221-virtual knife line; 23-antenna radiation area; 24-meander line, 3-RFID chip.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings 1-2, and the following embodiments are provided to illustrate the present invention, but not to limit the scope of the present invention.

The utility model provides an asymmetric structure hyperfrequency RFID label adopts asymmetric structure design, and it includes medium base plate 1, locates medium base plate 1's RFID antenna 2 and the RFID chip 3 of being connected with RFID antenna 2.

The RFID antenna 2 adopts a dipole antenna with an asymmetric structure. The RFID antenna 2 comprises an impedance matching loop 21, a tag damage region 22 and an antenna radiation region 23, wherein the impedance matching loop 21 is provided with an opening 211, the RFID chip is electrically connected with two ends of the opening 211 of the impedance matching loop 21 through conductive adhesive, the impedance matching loop 21 is electrically connected with one end of the tag damage region 22 through a meander line 24, and one end of the tag damage region 22 is also electrically connected with the antenna radiation region 23.

The impedance matching ring 21 is of a loop structure, and the impedance matching ring 21 adjusts the size according to the impedance of the RFID chip 3, so that a good matching effect with the RFID chip 3 is achieved.

The tag damage region 22 is disposed between the impedance matching loop 21 and the antenna radiation region 23, and when the tag is torn along the tag damage region 22, as shown in fig. 2, the remaining portion including the RFID chip 3 can still be identified by the reader/writer antenna, wherein the impedance matching loop 21 is connected to the tag damage region 22 through a bending line 24, and the bending line 24 is used to increase the performance of the RFID tag after being torn.

In a preferred embodiment, bend line 24 is folded a number of times > 2. The folding times are changed, and the radiation performance is improved. When the RFID tag is torn along the tag damage region 22, the bending line 24 has the function of the antenna radiation region 23, and the folding times of the bending line 24 improve the radiation performance, so that the torn RFID tag (the RFID tag with the antenna radiation region 23 removed) can have a certain identification capability.

In a preferred embodiment, the label break zone 22 is rectangular and typically has a width of 4-6mm, and in actual manufacture the label break zone 22 is arranged parallel to the short side of the media substrate 1. The rectangle, width and setting position are all for the convenience of subsequent production and the realization of the action of destruction. The method can be realized by adopting other existing structures, which can be easily realized by a person skilled in the art and is not described in detail.

In a preferred embodiment, a virtual knife line 221 is provided on the dielectric substrate 1 corresponding to the label breaking region 22. The virtual knife line 221 plays an easy tearing role.

In order to maximize the radiation performance of the antenna, in a preferred embodiment, the opening 211 of the impedance matching loop 21 is located in the middle of the long side of the impedance matching loop 21, and the long side of the impedance matching loop 21 is aligned with the polarization direction of the RFID antenna 2.

The RFID antenna 2 has dimensions 29mm × 55 mm. The RFID chip 3 is: any one of Ucode8, Ucode7 series, Monza R6, Monza 5, Monza4, H3, or H4.

The utility model discloses an adopt hyperfrequency RFID label of asymmetric structure design, through experimental, still realized when reading under the condition that the ware antenna is the linear polarization antenna, this label with read when ware antenna quadrature, under the condition of 90 tests promptly, the label still can be effectively discerned.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The ultrahigh frequency RFID tag with the asymmetric structure comprises a dielectric substrate, an RFID antenna arranged on the dielectric substrate and an RFID chip connected with the RFID antenna, and is characterized in that the RFID antenna comprises an impedance matching ring, a tag damage area and an antenna radiation area, the impedance matching ring is provided with an opening, the RFID chip is electrically connected with two ends of the opening of the impedance matching ring, the impedance matching ring is electrically connected with the tag damage area through a bent line, and the tag damage area is also electrically connected with the antenna radiation area.

2. The asymmetric-structure UHF RFID tag of claim 1 wherein the fold line has a number of folds > 2.

3. The asymmetric-structure UHF RFID tag of claim 1, wherein a virtual knife line is disposed on the dielectric substrate corresponding to the tag failure region.

4. The asymmetric-structure UHF RFID tag of claim 1, wherein the tag destruction zone is rectangular.

5. The asymmetric-structure UHF RFID tag of claim 1, wherein the width of the tag destruction zone is 4-6 mm.

6. The asymmetric-structure UHF RFID tag of claim 1, wherein the opening direction of the impedance matching loop is located in the middle of the long side of the impedance matching loop, and the long side of the impedance matching loop is consistent with the polarization direction of the RFID antenna.

7. The asymmetric-structure UHF RFID tag of claim 1, wherein the RFID antenna dimensions are 29mm x 55 mm.