CN203813020U - Ultra-high-frequency RFID tag antenna - Google Patents
Ultra-high-frequency RFID tag antenna Download PDFInfo
- Publication number
- CN203813020U CN203813020U CN201420054655.2U CN201420054655U CN203813020U CN 203813020 U CN203813020 U CN 203813020U CN 201420054655 U CN201420054655 U CN 201420054655U CN 203813020 U CN203813020 U CN 203813020U
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- China
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- antenna
- ultra
- high frequency
- frequency rfid
- rfid label
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Abstract
An ultra-high-frequency RFID tag antenna comprises an annular antenna and a radiation antenna. The annular antenna comprises an opening. The radiation antenna comprises a first antenna body and a second antenna body which are located on two sides of an opening of the annular antenna respectively. Each of the first antenna body and the second antenna body comprises a longitudinally extended first part, a transversely extended second part and an echo enhancing structure. Contact points of the first parts of the first and the second antenna bodies and the annular antenna are located on the half of the annular antenna opposite to the opening, and the tail end of the second part is connected to the echo enhancement structure. The tag antenna is small in occupied area and long in reading distance.
Description
Technical field
The utility model relates to field of antenna, relates in particular to a kind of ultra-high frequency RFID label 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.In rfid system, antenna is divided into two kinds of label antenna and reading and writing device antennas.The target of label antenna is that transmission is maximum can turnover label chip: when transmitting, be electromagnetic wave by high frequency current transitions; When reception, electromagnetic wave is converted to high-frequency current.If described RFID electronic tag is attached to certain certain objects, and store customizing messages, can be by the data in reading tag, realize the identification to certain objects, therefore RFID label has been widely used in the fields such as logistics management, retail management, taking care of books, asset management, personal identification.
But the reading distance of existing RFID label is shorter.
Summary of the invention
The problem that the utility model solves is to provide a kind of ultra-high frequency RFID label antenna, and the area occupying is less, and reading distance is far away.
For addressing the above problem, the utility model embodiment provides a kind of ultra-high frequency RFID label antenna, comprise loop aerial and radiating antenna, described loop aerial has opening, described radiating antenna comprises the first antenna body and the second antenna body, described the first antenna body and the second antenna body lay respectively at the opening both sides of loop aerial, described the first antenna body, the second antenna body all comprises the Part I of longitudinal extension, the Part II of horizontal expansion and echo strengthen structure, described the first antenna body, the Part I of the second antenna body is positioned on half loop aerial relative with opening with the contact point of loop aerial, and the tail end of described Part II strengthens structure with echo and is connected.
Optionally, to strengthen structure be "T"-shaped structure or " L " shape structure for described echo.
Optionally, in the time that described echo enhancing structure is "T"-shaped structure, the tail end of described Part II is connected with one end of the lateral part of "T"-shaped structure.
Optionally, in the time that described echo enhancing structure is "T"-shaped structure, length range is 14mm ~ 16mm, and width range is 8mm ~ 10mm.
Optionally, the width of described "T"-shaped structure is greater than the width of Part I and Part II.
Optionally, described the first antenna body and the second antenna body are with the center of circle of loop aerial and the line mirror image symmetry of opening.
Optionally, described Part I, Part II have S shape structure.
Optionally, the total height of described ultrahigh-frequency tag antenna is 25.5mm ~ 27.5mm.
Optionally, the live width scope of described Part I, Part II is 1.5mm ~ 2.5mm.
Optionally, described opening is as label chip fixing point.
Compared with prior art, the technical program has the following advantages: by radiating antenna being divided into the Part I of longitudinal extension, Part II and the echo enhancing structure of horizontal expansion, the area that described ultrahigh-frequency tag antenna is occupied is less, and reading distance is far away.
Brief description of the drawings
Fig. 1 is the structural representation of the ultrahigh-frequency tag antenna of the utility model embodiment;
Fig. 2 is the test result figure of the ultrahigh-frequency tag antenna of the utility model embodiment.
Embodiment
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, for the structural representation of the ultra-high frequency RFID label antenna of the utility model embodiment, described ultra-high frequency RFID label antenna, comprise loop aerial 1 and radiating antenna, described loop aerial 1 has opening 3, described radiating antenna comprises the first antenna body 4 and the second antenna body 5, described the first antenna body 4 and the second antenna body 5 lay respectively at opening 3 both sides of loop aerial 1, described the first antenna body 4, the second antenna body 5 all comprises the Part I 6 of longitudinal extension, the Part II 7 of horizontal expansion and echo strengthen structure 8, described the first antenna body, the Part I 6 of the second antenna body is positioned on half loop aerial relative with opening 3 with the contact point 9 of loop aerial 1, and the tail end of described Part II 7 strengthens structure 8 with echo and is connected.
In the present embodiment, described loop aerial 1 is circular, and the diameter of described loop aerial 1 is 6mm ~ 9mm.In other embodiments, described loop aerial can also be ellipse etc.
Described opening 3 is as ultrahigh-frequency tag chip fixing point, and described label chip is connected the loop aerial of opening 3 both sides across opening 3.In the present embodiment, label chip is ultra-high frequency RFID label chip, corresponding, the label antenna that described label antenna is ultrahigh frequency RFID.In other embodiments, described label antenna can be also the label antenna of other wave bands.
The Part I 6 of described the first antenna body, the second antenna body is positioned on half loop aerial relative with opening 3 with the contact point 9 of loop aerial 1, make the described Part I 6 can longitudinal extension, described is longitudinally the direction of parallel in Fig. 1 and Y-axis, can effectively utilize the area that antenna occupies, under the prerequisite of length of not dwindling the first antenna body, the second antenna body, by increasing the height D of ultrahigh-frequency tag antenna, the width of ultrahigh-frequency tag antenna can be reduced, thereby the area of antenna can be reduced.In the present embodiment, the total height of described ultrahigh-frequency tag antenna is 25.5mm ~ 27.5mm, and described the first antenna body and the second antenna body are with the center of circle of loop aerial and the line mirror image symmetry of opening.
Because all comprising the Part I of longitudinal extension, Part II and the echo of horizontal expansion, described the first antenna body 4, the second antenna body 5 strengthen structure, described is laterally the direction of parallel in Fig. 1 and X-axis, and described Part I, Part II have S shape structure, make, under the prerequisite of length of not dwindling the first antenna body, the second antenna body, to dwindle antenna area.In the present embodiment, described Part I and Part II have a S shape structure, and in other embodiments, described Part I and Part II also can have multiple S shape structures.
The width of described echo enhancing structure is greater than the live width of Part I and Part II, utilizes described echo to strengthen structure and can reduce return loss, improves reading distance.In the present embodiment, it is "T"-shaped structure that described echo strengthens structure 8, and the length range of described "T"-shaped structure is 14mm ~ 16mm, and width range is 8mm ~ 10mm.The tail end of described Part II is connected with one end of the lateral part of "T"-shaped structure.In other embodiments, it can be also " L " shape structure that described echo strengthens structure, and the tail end of described Part II is connected with the breakover point of " L " shape structure.
In the present embodiment, the live width scope of described Part I, Part II is 1.5mm ~ 2.5mm, and the live width of described "T"-shaped structure is greater than the live width of Part I and Part II, is conducive to improve reading distance.
Please refer to Fig. 2, is the test result figure of the ultrahigh-frequency tag antenna of the utility model embodiment, and wherein ordinate is return loss, and abscissa is echo frequency.In the present embodiment, described ultrahigh-frequency tag antenna is at less near the local return loss of freq=915MHz, corresponding return loss dB(S11_fitted)=-10.222, the reading distance that is therefore positioned at frequency and is near label antenna 915MHz is larger.
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 ultra-high frequency RFID label antenna, it is characterized in that, comprise loop aerial and radiating antenna, described loop aerial has opening, described radiating antenna comprises the first antenna body and the second antenna body, described the first antenna body and the second antenna body lay respectively at the opening both sides of loop aerial, described the first antenna body, the second antenna body all comprises the Part I of longitudinal extension, the Part II of horizontal expansion and echo strengthen structure, described the first antenna body, the Part I of the second antenna body is positioned on half loop aerial relative with opening with the contact point of loop aerial, and the tail end of described Part II strengthens structure with echo and is connected.
2. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, it is "T"-shaped structure or " L " shape structure that described echo strengthens structure.
3. ultra-high frequency RFID label antenna as claimed in claim 2, is characterized in that, in the time that described echo enhancing structure is "T"-shaped structure, the tail end of described Part II is connected with one end of the lateral part of "T"-shaped structure.
4. ultra-high frequency RFID label antenna as claimed in claim 2, is characterized in that, in the time that described echo enhancing structure is "T"-shaped structure, length range is 14mm ~ 16mm, and width range is 8mm ~ 10mm.
5. ultra-high frequency RFID label antenna as claimed in claim 2, is characterized in that, the live width of described "T"-shaped structure is greater than the live width of Part I and Part II.
6. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, described the first antenna body and the second antenna body are with the center of circle of loop aerial and the line mirror image symmetry of opening.
7. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, described Part I, Part II have S shape structure.
8. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, the total height of described ultrahigh-frequency tag antenna is 25.5mm ~ 27.5mm.
9. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, the live width scope of described Part I, Part II is 1.5mm ~ 2.5mm.
10. ultra-high frequency RFID label antenna as claimed in claim 1, is characterized in that, described opening is as label chip fixing point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054655.2U CN203813020U (en) | 2014-01-28 | 2014-01-28 | Ultra-high-frequency RFID tag antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054655.2U CN203813020U (en) | 2014-01-28 | 2014-01-28 | Ultra-high-frequency RFID tag antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813020U true CN203813020U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420054655.2U Expired - Fee Related CN203813020U (en) | 2014-01-28 | 2014-01-28 | Ultra-high-frequency RFID tag antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN203813020U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114970588A (en) * | 2022-07-28 | 2022-08-30 | 中国计量大学 | Ultrahigh frequency RFID electronic tag capable of preventing data collision and radio frequency identification system |
-
2014
- 2014-01-28 CN CN201420054655.2U patent/CN203813020U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114970588A (en) * | 2022-07-28 | 2022-08-30 | 中国计量大学 | Ultrahigh frequency RFID electronic tag capable of preventing data collision and radio frequency identification system |
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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: 20150128 |
|
| EXPY | Termination of patent right or utility model |