CN203813023U - Near field antenna of RFID ultrahigh frequency electronic label - Google Patents
Near field antenna of RFID ultrahigh frequency electronic label Download PDFInfo
- Publication number
- CN203813023U CN203813023U CN201420187423.4U CN201420187423U CN203813023U CN 203813023 U CN203813023 U CN 203813023U CN 201420187423 U CN201420187423 U CN 201420187423U CN 203813023 U CN203813023 U CN 203813023U
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- China
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- opening
- near field
- ultrahigh frequency
- electronic tag
- frequency electronic
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Abstract
The utility model provides a near field antenna of an RFID ultrahigh frequency electronic label. The near field antenna comprises an annular antenna and an internal antenna located in the annular antenna, wherein the annular antenna comprises a first opening and a second opening which are symmetrical in position, the first opening is used for mounting an RFID chip; the internal antenna comprises a main portion and two wing portions which are located at two sides of the main portion and connected with the main portion, the main portion comprises a first protruding structure which protrudes toward the first opening and a second protruding structure which protrudes toward the second opening; the internal antenna is in axial symmetry about the connection line of the midpoints of the two openings of the annular antenna, and the internal antenna is connected with the annular antenna through the wing portions. By employing the label antenna, a beneficial effect is achieved that the impedance and the chip used are matched, so that the reading performance is improved.
Description
Technical field
The utility model relates to field of antenna, relates in particular to a kind of RFID ultrahigh frequency electronic tag near field antenna.
Background technology
Radio-frequency (RF) identification (Radio Frequency Identification, RFID) technology is a kind of automatic identification technology of rising in recent years.The basic module of its system comprises RFID electronic tag, rfid interrogator and antenna.Wherein, antenna is a kind of device that the radiofrequency signal power of wireless set is received or radiate with electromagnetic wave form.
Ultrahigh frequency RFID electronic tag is easily subject to the impact of environment at present, cannot penetrate most of liquid, and reading distance excessively far away has also hindered its application on some field.The principle of ultrahigh frequency RFID near field electronic tag based on electromagnetic coupled is operated in the near-field region of reader, this makes ultrahigh frequency RFID near field electronic tag have the feature of high-frequency RF ID electronic tag: read distance short, safety and reliability is good, has effectively reduced read false rate; To adverse circumstances strong adaptability around, anti-interference is good; Bandwidth is high, energy consumption is low.Simultaneously compared with high-frequency RF ID electronic tag: hyperfrequency near field tag is simple in structure, and miniaturization more, greatly reduces manufacturing cost.
The near field antenna of present stage mostly is common loop aerial, impedance mismatch, and offset frequency is more, causes reading performance not good, read blind area more, and environmental suitability is poor.
Utility model content
In order to overcome the deficiency of above-mentioned near field antenna, the utility model embodiment provides a kind of RFID ultrahigh frequency electronic tag near field antenna, and impedance is mated with chip used, thereby has improved reading performance.
For this reason, the utility model embodiment provides a kind of RFID ultrahigh frequency electronic tag near field antenna, comprise loop aerial and the inside antenna that is positioned at loop aerial inside, described loop aerial has the first opening and second opening of position symmetry, and the first opening is wherein used for installing RFID chip, described inside antenna comprises principal part and two alar parts that are positioned at principal part both sides and are connected with principal part, described principal part comprises dashing forward to be given prominence to structure and dashes forward to the second outstanding structure of the second opening to first of the first opening, described inside antenna is with the line axial symmetry of two opening mid points of loop aerial, and described inside antenna is connected with loop aerial by described alar part.
Optionally, described inside antenna is bat structure, and wherein the principal part of bat structure comprises and dashes forward to the first outstanding structure of the first opening and dash forward to the second outstanding structure of the second opening, and the alar part of described bat structure comprises the 3rd outstanding structure of dashing forward to the first opening.
Optionally, the top of the described second outstanding structure has trapezoidal or triangle concave inward structure, makes the top of the described second outstanding structure form at least two spikes.
Optionally, a described alar part comprises at least one the 3rd outstanding structure.
Optionally, the described the 3rd outstanding structure structure triangular in shape or class triangular structure, drift angle angular range is 20 degree～40 degree, the length stretching into the first opening one side is 3mm～6mm.
Optionally, the first described outstanding structure structure triangular in shape or class triangular structure, drift angle angular range is 40 degree～60 degree, is 6mm～8mm to the first opening one side built-in length.
Optionally, the described second outstanding top of structure and the scope of loop aerial spacing are 1mm～4mm.
Optionally, the scope of described loop aerial outer radius is 8mm～12mm.
Optionally, the extended distance scope of described the second opening is 3mm～7mm.
Optionally, the position that described alar part is connected with loop aerial is crescent shape structure.
Compared with prior art, the technical program has the following advantages:
By the RFID ultrahigh frequency electronic tag near field antenna of special construction, described antenna can obtain higher induced voltage in near-field region, be conducive to Energy Coupling, is more difficult for being affected in complex environment, can be applied under metal and liquid environment.
By being arranged on position and the shape of loop aerial and the second outstanding structure, regulate impedance, to reach the object of mating with chip used impedance phase, read range can cover whole near-field region, thereby in all directions, reads the stable blind area of having reduced.
Brief description of the drawings
Fig. 1 is the structural representation of the RFID ultrahigh frequency electronic tag near field antenna of the utility model embodiment;
Fig. 2 is the RFID ultrahigh frequency electronic tag near field antenna return loss emulation schematic diagram of the utility model embodiment.
Specific embodiments
Below in conjunction with accompanying drawing, by specific embodiment, the technical solution of the utility model is carried out to clear, complete description.
Please refer to Fig. 1, is the structural representation of the RFID ultrahigh frequency electronic tag near field antenna of the utility model embodiment.Described RFID ultrahigh frequency electronic tag near field antenna 1 comprises loop aerial 5 and is positioned at the inside antenna 9 of loop aerial 5 inside, described loop aerial 5 has the first opening 5 and second opening 10 of position symmetry, and the first opening 5 is wherein for RFID chip is installed, and described RFID chip is across described the first opening 5.In the present embodiment, label chip is RFID label chip, corresponding, described label antenna is the label antenna of RFID UHF, in other embodiments, described label antenna can be also the label antenna of other wave bands.
The scope of described loop aerial outer radius is 8mm～12mm.In the present embodiment, described loop aerial 5 external diameters are 10mm～12mm, and internal diameter is 9mm～11mm.
Described inside antenna 9 comprises principal part and two alar parts that are positioned at principal part both sides and are connected with principal part, described principal part comprises dashing forward to be given prominence to structure and dashes forward to the second outstanding structure of the second opening to first of the first opening, described inside antenna 9 is with the line axial symmetry of two opening mid points of loop aerial, and described inside antenna 9 is connected with loop aerial by described alar part.
In the present embodiment, described inside antenna is bat structure, wherein the principal part of bat structure comprises and dashes forward to the first outstanding structure 8 of the first opening 6 and dash forward to the second outstanding structure 4 of the second opening 10, the alar part of described bat structure comprises the 3rd outstanding structure 7 of dashing forward to the first opening 6, and the alar part of described bat structure is connected with loop aerial 5.
The first described outstanding structure 8 structure triangular in shape or class triangular structure, described class triangle is drift angle and has the triangular structure of chamfering, the drift angle angle beta scope of described triangular structure or class triangular structure is 40 degree～60 degree, and is 6mm～8mm to the first opening 6 one side built-in lengths.
The described the 3rd outstanding structure 7 structure triangular in shape or class triangular structure, the drift angle angle [alpha] scope of described triangular structure or class triangular structure is 20 degree～40 degree, the length stretching into the first opening 6 one sides is 3mm～6mm.
In the present embodiment, an alar part comprises one the 3rd outstanding structure 7, and in other embodiments, an alar part can also comprise at least two the 3rd outstanding structures.
Between described inside antenna 9 and loop aerial 5 and be positioned at the first opening 6 one sides and there is the first gap structure 2, by regulate first in described inside antenna 9 give prominence to the angle of structure 8, the 3rd outstanding structure 7, built-in length, quantity and, make described antenna can obtain higher induced voltage in near-field region, be conducive to Energy Coupling, thereby improve reading distance and adaptive capacity to environment.
In the present embodiment, the position that described alar part is connected with loop aerial 5 is crescent shape structure 3, makes the described loop aerial 5 near the second opening 10 form the first angle, and the scope of described the first angle theta is 5 degree～25 degree.In other embodiments, the described loop aerial near the second opening can be also cirque structure.
In the present embodiment, the extended distance scope of described the second opening 10 is 3mm～7mm.In other embodiments, the extended distance of described the second opening can be also other values.
In the present embodiment, the drift angle of the described second outstanding structure 4 has trapezoidal concave inward structure, and the areal extent of described trapezoidal concave inward structure is 1mm
2～3mm
2, make the drift angle of the described second outstanding structure form two spikes, and the described second outstanding top of structure and the scope of loop aerial spacing are 1mm～4mm.In other embodiments, the described second outstanding structure is trapezium structure, triangular structure, class triangular structure, the drift angle of the described second outstanding structure has at least one trapezoidal or triangle concave inward structure, makes the drift angle of the described second outstanding structure form at least two spikes.
The impedance matching structure of the described RFID ultrahigh frequency electronic tag near field antenna of loop aerial 5 common composition of the described second outstanding structure 4 and close the second opening 10.By regulating apex angles scope, the spacing range near the loop configuration 5 of the second opening 10, the groove area of the second outstanding structure drift angle, the spacing of the second outstanding structure drift angle and loop aerial 5, make the output impedance of described RFID ultrahigh frequency electronic tag near field antenna and the impedance conjugate impedance match of label chip, the energy consuming because of reflection can greatly reduce work time, thereby increase reading distance, has improved reading performance.
And described RFID ultrahigh frequency electronic tag near field antenna mirror image symmetry, this symmetrical structure makes described antenna in all directions, all have better reading performance, has greatly reduced blind area.
Please refer to Fig. 2, is the return loss analogous diagram of the label antenna of the utility model embodiment, and wherein abscissa is frequency, and ordinate is return loss.Described label antenna operating frequency is 900MHz in the present embodiment, meets the ultra-high frequency band standard of China; Return loss is-0.397dB to be also better than near field antenna used at present.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; can utilize method and the technology contents of above-mentioned announcement to make possible variation and amendment to technical solutions of the utility model; therefore; every content that does not depart from technical solutions of the utility model; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all belong to the protection range of technical solutions of the utility model.
Claims (10)
1. a RFID ultrahigh frequency electronic tag near field antenna, it is characterized in that, comprise loop aerial and the inside antenna that is positioned at loop aerial inside, described loop aerial has the first opening and second opening of position symmetry, and the first opening is wherein used for installing RFID chip, described inside antenna comprises principal part and two alar parts that are positioned at principal part both sides and are connected with principal part, described principal part comprises dashing forward to be given prominence to structure and dashes forward to the second outstanding structure of the second opening to first of the first opening, described inside antenna is with the line axial symmetry of two opening mid points of loop aerial, and described inside antenna is connected with loop aerial by described alar part.
2. RFID ultrahigh frequency electronic tag near field antenna according to claim 1, it is characterized in that, described inside antenna is bat structure, wherein the principal part of bat structure comprises and dashes forward to the first outstanding structure of the first opening and dash forward to the second outstanding structure of the second opening, and the alar part of described bat structure comprises the 3rd outstanding structure of dashing forward to the first opening.
3. RFID ultrahigh frequency electronic tag near field antenna according to claim 2, is characterized in that, the drift angle of the described second outstanding structure has trapezoidal or triangle concave inward structure, makes the drift angle of the described second outstanding structure form at least two spikes.
4. RFID ultrahigh frequency electronic tag near field antenna according to claim 2, is characterized in that, a described alar part comprises at least one the 3rd outstanding structure.
5. RFID ultrahigh frequency electronic tag near field antenna according to claim 2, it is characterized in that, the described the 3rd outstanding structure structure triangular in shape or class triangular structure, drift angle angular range is 20 degree～40 degree, the length stretching into the first opening one side is 3mm～6mm.
6. RFID ultrahigh frequency electronic tag near field antenna according to claim 2, it is characterized in that, the first described outstanding structure structure triangular in shape or class triangular structure, drift angle angular range is 40 degree～60 degree, is 6mm～8mm to the first opening one side built-in length.
7. RFID ultrahigh frequency electronic tag near field antenna according to claim 2, is characterized in that, the described second outstanding top of structure and the scope of loop aerial spacing are 1mm～4mm.
8. RFID ultrahigh frequency electronic tag near field antenna according to claim 1, is characterized in that, the scope of described loop aerial outer radius is 8mm～12mm.
9. RFID ultrahigh frequency electronic tag near field antenna according to claim 1, is characterized in that, the extended distance scope of described the second opening is 3mm～7mm.
10. RFID ultrahigh frequency electronic tag near field antenna according to claim 1, is characterized in that, the position that described alar part is connected with loop aerial is crescent shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420187423.4U CN203813023U (en) | 2014-04-17 | 2014-04-17 | Near field antenna of RFID ultrahigh frequency electronic label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420187423.4U CN203813023U (en) | 2014-04-17 | 2014-04-17 | Near field antenna of RFID ultrahigh frequency electronic label |
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| Publication Number | Publication Date |
|---|---|
| CN203813023U true CN203813023U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420187423.4U Expired - Fee Related CN203813023U (en) | 2014-04-17 | 2014-04-17 | Near field antenna of RFID ultrahigh frequency electronic label |
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| CN (1) | CN203813023U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972640A (en) * | 2014-04-17 | 2014-08-06 | 杭州电子科技大学 | Ultrahigh RFID near field antenna |
-
2014
- 2014-04-17 CN CN201420187423.4U patent/CN203813023U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972640A (en) * | 2014-04-17 | 2014-08-06 | 杭州电子科技大学 | Ultrahigh RFID near field antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20150417 |
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| EXPY | Termination of patent right or utility model |