CN202042597U

CN202042597U - Electronic tag directional antenna for enhancing property of RFLD tag

Info

Publication number: CN202042597U
Application number: CN2011201176972U
Authority: CN
Inventors: 牟军; 宋向明
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-20
Filing date: 2011-04-20
Publication date: 2011-11-16
Anticipated expiration: 2021-04-20

Abstract

The utility model discloses an electronic tag directional antenna for enhancing property of an RFLD (Radio Frequency Identification) tag. The electronic tag directional antenna comprises a substrate, as well as a first reflector, a second reflector, a first symmetrical dipole, a second symmetrical dipole, and a microchip which are arranged on the substrate, wherein; a folding line is arranged at the middle part of the substrate; the microchip is clung to the folding line; the first and the second reflectors are in symmetrical arrangement by taking the folding line as a center line; and the first and the second symmetrical dipoles are in symmetrical arrangement in the direction of the folding line by taking the microchip as the center. The electronic tag directional antenna provided by the utility model has the advantages of simple and compact structure, simplicity and convenience in processing, low cost, and better antenna property.

Description

Can strengthen the electronic tag directional antenna of RFID tag performance

Technical field

The utility model is mainly concerned with radio-frequency (RF) identification (RFID) system field, refers in particular to a kind of electronic tag directional antenna.

Background technology

Along with the research and development of product electronic code (EPC) and Internet of Things, the design of hyperfrequency (UHF) electronic tag more and more is subjected to people's attention.Radio-frequency (RF) identification (RFID) system is made of electronic tag and read write line, its course of work is, read write line produces the electromagnetic wave of characteristic frequency and sends (send and put question to signal) by spatial coupling, when read write line enter electronic tag read apart from the time electronic tag return to read write line (answer answer signal) after receiving this enquirements signal and the electromagnetic wave of read write line transmission being carried out the backscattering coupling.

Because electronic tag is convenient, effective, electronic tag is widely used in logistics transportation and the supply chain management by people.Method commonly used is that the RFID electronic tag directly is attached to certain smooth zone, packing case surface, but this method that label is arranged on certain plane of packing case has limitation.

The radiation efficiency of packing case electronic tag is subjected to the very big influence of connection with wrapping of piece content.Can absorb electromagnetic medium if connection with wrapping of piece is water or wet goods, or metal etc. can be at the medium of specific direction reflection electromagnetic wave, then the radiation efficiency of electronic tag will significantly reduce.In RFID used, the method that tackle electromagnetic radiation decrease in efficiency problem mainly contained the increasing antenna gain, attempts to penetrate the electromagnetic absorption material; Perhaps adopt multiple antenna method, make the part antenna can accept electromagnetic signal from different perspectives.Also having another kind of method is user tropism's antenna in packing, by adjusting and the design to antenna, increases gain or radiation is focused on the direction that certain does not have the electromagnetism obstacle in certain direction.But said structure is comparatively complicated.

The utility model content

The technical problems to be solved in the utility model is: at the technical problem that prior art exists, the utility model provide a kind of simple and compact for structure, processing is easy, with low cost, the electronic tag directional antenna of strengthened RFID tag performance with preferable antenna performance.

For solving the problems of the technologies described above, the utility model by the following technical solutions:

A kind of electronic tag directional antenna that strengthens the RFID tag performance, it is characterized in that: first reflector, second reflector, first symmetrical dipole, second symmetrical dipole and the microchip that comprise the sheet base and be arranged in the sheet base, the middle part of described base is provided with fold line, described microchip is arranged in the position that is close proximity to fold line, described first reflector and second reflector are that center line is symmetry shape and arranges with the fold line, and to be the center with the microchip be the symmetry shape layout along the direction of fold line for first symmetrical dipole and second symmetrical dipole.

As further improvement of the utility model:

Described first symmetrical dipole and second symmetrical dipole are that the identical symmetrical dipole and the length of this symmetrical dipole are that described microchip receives half of electromagnetic wavelength.

Described first reflector and second reflector are the length of the length of identical reflector and this reflector greater than first symmetrical dipole and second symmetrical dipole.

Distance between described reflector and the symmetrical dipole is 1/10th of a reflector length.

It is rectangular-shaped that described base with the fold line is that central folding builds up.

Compared with prior art, advantage of the present utility model is: the electronic tag directional antenna of the RFID of enhancing tag performance of the present utility model, simple and compact for structure, processing easy, with low cost, when using, utilize the intrinsic space attribute of packing case, antenna is placed on the packing case edge, to reach the purpose that strengthens the RFID antenna performance; That is, can arrange that make it have higher performance, order farther read distance, in each link in fields such as logistics, all can realize contactless efficiently management according to the seamed edge of packing case.Especially, the utility model to be liquid and metal etc. in the packing case to the unfriendly article of electromagnetism the time, still can strengthen antenna performance.

Description of drawings

Fig. 1 is the structural representation of the utility model in concrete application example;

Fig. 2 is the structural representation of the utility model when being in deployed condition;

Fig. 3 is an emulation direction result schematic diagram of the present utility model.

Marginal data:

1, first reflector; 2, first symmetrical dipole; 3, microchip; 4, second reflector; 5, second symmetrical dipole; 6, sheet base; 7, fold line; 8, packing case.

Embodiment

Below with reference to the drawings and specific embodiments the utility model is described in further detail.

As depicted in figs. 1 and 2, the electronic tag directional antenna that strengthens the RFID tag performance of the present utility model, comprise sheet base 6 and be arranged in first reflector 1 on the sheet base 6, second reflector 4, first symmetrical dipole 2, second symmetrical dipole 5 and microchip 3, the middle part of sheet base 6 is provided with fold line 7, microchip 3 and radiating element (not shown) thereof are arranged in the position that is close proximity to fold line 7, first reflector 1 and second reflector 4 are that center line is symmetry shape and arranges with fold line 7, and to be the center with microchip 3 be the symmetry shape layout along the direction of fold line 7 for first symmetrical dipole 2 and second symmetrical dipole 5.Wherein, the whole electrically conductive ink that adopts of antenna is printed or vacuum aluminum-coated manufactured, and microchip 3 is read-write chip, is used to store the information relevant with the packing content thing, and can upgrades by the read write line of correspondence; The material of sheet base 6 is paper, PP, PE or PET etc., customizes as required.

In the present embodiment, first symmetrical dipole 2 and second symmetrical dipole 5 are that microchip 3 receives half of electromagnetic wavelengths for the length of identical symmetrical dipole and this symmetrical dipole.First reflector 1 and second reflector 4 are the length of the length of identical reflector and this reflector greater than first symmetrical dipole 2 and second symmetrical dipole 5.Distance between reflector and the symmetrical dipole is 1/10th of a reflector length.

Referring to Fig. 2, the shape when being the present embodiment flattening.Referring to Fig. 1, be example the utility model is applied to packing case 8, arrow is represented aerial radiation direction (level is outside), when arranging the RFID label, the seamed edge of fold line 7 with packing case 8 coincided, and when packing case 8 launched, label was bent into 90 degree automatically.Can be with the seamed edge position of this electronic tag directional antenna arrangement in packing case 8, its antenna adopts dipole antenna simple in structure.This be a kind of be arranged in the packing case 8 (on) passive RF label, pass through read write line, the content that packing case 8 will be packed writes the RFID label, and information comprises multiple information such as Item Title in the packing case 8, quantity, manufacturer, date of manufacture, preserving type.From simulation result, this antenna has directional characteristic preferably.

In the present embodiment, antenna is to fold according to the shape of packing case 8, it is rectangular-shaped that to be sheet base 6 be with fold line 7 that central folding builds up, vertical line between two reflectors and the symmetrical dipole constitutes 90 degree mutually, be that antenna is arranged according to the seamed edge of packing case 8, the radiating element that wherein connects microchip 3 is close to the seamed edge layout, and two reflectors then are arranged in the both sides of radiating element, lay respectively on two orthogonal planes.The function of reflector is exactly to make the aerial radiation direction extend to the opposite direction of reflector, dipole antenna with respect to planar structure, two angles of the design are the reverser of 90 degree, can make that the aerial radiation direction is outside, make that also the directivity of antenna is better.Electronic tag directional antenna resonance frequency of the present utility model is a hyperfrequency, and reading distance reaches more than 10 meters, and the chip of label is read-write, the information of article in the packing case can be write chip, and can upgrade at any time, helps transportation management.And make antenna gain improve.In sum, the utility model has made full use of the physical form of packing case 8, and production cost is low, is easy to realize, and with respect to plane RFID label, has more performance.

As shown in Figure 3, antenna of the present utility model is in Φ=45 degree, and gain reaches maximum 5.4dBi, and the half-wave dipole of comparison with standard (2.15dBi) has strengthened 3.25dB.

The above only is a preferred implementation of the present utility model, and protection range of the present utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to protection range of the present utility model.Should propose, for those skilled in the art, in the improvements and modifications that do not break away under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1. electronic tag directional antenna that can strengthen the RFID tag performance, it is characterized in that: comprise sheet base (6) and be arranged in first reflector (1) on the sheet base (6), second reflector (4), first symmetrical dipole (2), second symmetrical dipole (5) and microchip (3), the middle part of described base (6) is provided with fold line (7), described microchip (3) is arranged in the position near fold line (7), described first reflector (1) and second reflector (4) are that center line is symmetry shape and arranges with fold line (7), and be the center with microchip (3) be the symmetry shape layout along the direction of fold line (7) for described first symmetrical dipole (2) and second symmetrical dipole (5).

2. the electronic tag directional antenna that strengthens the RFID tag performance according to claim 1 is characterized in that: described first symmetrical dipole (2) and second symmetrical dipole (5) are that described microchip (3) receives half of electromagnetic wavelength for the length of identical symmetrical dipole and this symmetrical dipole.

3. the electronic tag directional antenna that strengthens the RFID tag performance according to claim 2 is characterized in that: described first reflector (1) and second reflector (4) are the length of identical reflector and this reflector length greater than first symmetrical dipole (2) and second symmetrical dipole (5).

4. the electronic tag directional antenna that strengthens the RFID tag performance according to claim 3 is characterized in that: the distance between described reflector and the symmetrical dipole is 1/10th of a reflector length.

5. according to claim 1 or 2 or the 3 or 4 described electronic tag directional antennas that strengthen the RFID tag performance, it is characterized in that: it is rectangular-shaped that described base (6) is with fold line (7) that central folding builds up.