CN202267981U - Anti-metal electronic tag having directionality and based on PIFA - Google Patents
Anti-metal electronic tag having directionality and based on PIFA Download PDFInfo
- Publication number
- CN202267981U CN202267981U CN2011203285122U CN201120328512U CN202267981U CN 202267981 U CN202267981 U CN 202267981U CN 2011203285122 U CN2011203285122 U CN 2011203285122U CN 201120328512 U CN201120328512 U CN 201120328512U CN 202267981 U CN202267981 U CN 202267981U
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- metal
- electronic tag
- directionality
- medium substrate
- pifa
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Abstract
The utility model discloses an anti-metal electronic tag having directionality and based on PIFA. The bottom face of a medium substrate is stuck with the top face of a metal ground. An inverted-F-shaped antenna is disposed on the top face of the medium substrate. Two feed pins are arranged on a radiation vibrator of the inverted-F-shaped antenna at an end close to a short circuit pin. A chip positioning point is arranged between the two feed pins. Except feed points and the chip positioning points, other conductor parts on the top face of the medium substrate and the bottom face of the metal ground are both coated with epoxy resin layers. An electronic tag chip is fixed on the chip positioning point. And pins of the electronic tag chip connect with the two feed points respectively. The short circuit pin penetrates through the inverted-F-shaped antenna, the medium substrate and the metal ground and then connects with the metal ground fixedly. The anti-metal electronic tag having directionality and based on PIFA has comparatively high directionality. The matching of the anti-metal electronic tag having directionality and based on PIFA and different electronic tag chips is realized through adjusting the positioning of the feed points and the position of a short circuit face. And an anti-metal function is realized in the anti-metal electronic tag having directionality and based on PIFA.
Description
Technical field
The utility model relates to a kind of electronic tag, is specifically related to a kind of directionality anti-metal electronic tag based on PIFA, belongs to RF identification (Radio Frequency Identification, RFID) technical field.
Background technology
RFID is the abbreviation of Radio Frequency Indentification, is a kind ofly to carry out non-contacting bidirectional data communication through wireless radio frequency mode a kind of automatic identification technology that article to be measured are discerned.Its maximum characteristics are exactly can the multiple goal Dynamic Recognition.RFID is as one of the core in Internet of Things field, and its technical development directly affects popularizing and using of Internet of Things industry.Congested traffic, medicine, food security, modern logistics etc. all press for a kind of technology and from loaded down with trivial details manual labor, free the people, and the RFID technology can satisfy this demand of social development as a kind of new automatic identification technology.
Passive electronic label is by electronic label chip, and electronic label antenna and encapsulating material are formed.When electronic tag entered into the electromagnetic field that reader launches, the energy that electronic label antenna is accepted was during greater than the minimum threshold power of electronic label chip, and the electronic label chip internal circuit is activated, and the order of reader is responded.Thereby realize communicating by letter between electronic tag and the reader.In the metal environment, because skin effect, the electromagnetic waves ability of UHF is more weak, and in the metal environment, the communication between electronic tag and the reader often receives the influence of metal environment, causes both communication failures or reading distance to reduce greatly.Therefore, need a kind of electronic tag can overcome of the influence of metal environment, the efficient communication between realization and the reader to it.
Summary of the invention
The purpose of the utility model is to remedy the deficiency of prior art, and a kind of anti-metal electronic tag of undersized high directionality based on PIFA is provided.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is:
A kind of directionality anti-metal electronic tag based on PIFA; At least comprise medium substrate and electronic label chip; The end face on the bottom surface of medium substrate and metal ground is pasted; Inverse-F antenna is positioned on the end face of medium substrate, and the end near the short circuit pin on the radiating doublet of inverse-F antenna is provided with two feed pin, is provided with the chip anchor point between two feed pin; On the bottom surface on feeding point and other conductor parts the chip anchor point and metal ground, be coated with epoxy resin layer on the end face of medium substrate; Electronic label chip is fixed in chip anchor point place, and the pin of electronic label chip is connected with two feed pin respectively, the short circuit pin pass behind inverse-F antenna, medium substrate and the metal ground with metal be fixedly connected.
And medium substrate is the FR4 substrate.
And the epoxy resin layer and the Double-face gummed paper that are coated on the bottom surface on metal ground are pasted.
And electronic tag is provided with two fixed orifices, and said fixed orifice is a through hole.
And the shape size of medium substrate is complementary with the shape size on metal ground.
And inverse-F antenna is copper antenna.
Compared with prior art, the utlity model has following advantage:
Common dipole electric field radiation in the plane externally is 8 fonts, and emittance divides two parts to divide equally, so directionality is lower.And the electronic tag that the utility model provides has utilized the antenna structure based on the PIFA of little band; Antenna energy mainly concentrates on a direction radiation; Directionality is higher, and the coupling between electronic label antenna and the different electronic label chips can be realized in the position of position and short circuit face through the adjustment feeding point.In addition, the electronic tag that the utility model provides utilizes the structure on little band band ground, has overcome the influence of metal environment to the communication efficiency between electronic tag and the reader effectively, has realized the function of anti-metal.
Description of drawings
Fig. 1 is medium substrate and the structural representation that is positioned at the inverse-F antenna on the medium substrate;
Fig. 2 is the structural representation based on the directionality anti-metal electronic tag of PIFA;
Fig. 3 be Fig. 2 along A-A to cut-open view;
Among the figure, the 1-inverse-F antenna; The 2-feed pin; 3-chip anchor point; 4-short circuit pin; The 5-radiating doublet; The 6-medium substrate; The 7-fixed orifice; 8-metal ground; The 9-electronic label chip; The 10-Double-face gummed paper; The 11-epoxy resin layer.
Embodiment
Through accompanying drawing and specific embodiment the utility model is further described below.
Like Fig. 1～shown in Figure 3, the directionality anti-metal electronic tag based on PIFA that the utility model provides mainly comprises inverse-F antenna 1, medium substrate 6, metal ground 8 and electronic label chip 9.
The end face on the bottom surface of medium substrate 6 and metal ground 8 is pasted, and the shape size on the shape of medium substrate 6 size and metal ground 8 is complementary, and inverse-F antenna 1 is positioned on the end face of medium substrate 6, and the medium substrate in the present embodiment is the FR4 substrate of thickness 3mm.Be provided with between 2, two feed pin of two feed pin near an end of short circuit pin 4 on the radiating doublet 5 of inverse-F antenna and be provided with chip anchor point 3.On the bottom surface on feeding point and other conductor parts the chip anchor point and metal ground 8, be coated with epoxy resin layer 11 on the end face of medium substrate 6, the epoxy resin layer and the Double-face gummed paper 10 that are coated on the bottom surface on metal ground 8 are pasted.Electronic label chip 9 is fixed in chip anchor point 3 places, and the pin of electronic label chip 9 is connected with two feed pin respectively, and short circuit pin 4 passes inverse-F antenna 1, medium substrate 6 and 8 backs, metal ground and is fixedly connected with metal ground 8.
The electronic tag of the utility model is provided with two fixed orifices 7, and said fixed orifice is a through hole, and two fixed orifices preferably have certain spacing.
The principle of work based on the directionality anti-metal electronic tag of PIFA that the utility model provides is following:
Inverse-F antenna is the distortion of common dipole, and it is to be bent into the first half of common dipole parallel to the ground, reducing the physical size of antenna, and needs to keep its resonance frequency constant.But after the first half of dipole bending, but brought stray capacitance, the perception that is produced through short circuit pin (or short circuit face) can compensate the capacitive that is caused by bending.Simultaneously, the metal ground of introducing produces reflex to the latter half space radiation of common dipole, makes the electromagnetic wave energy of radiation only to first segment space radiation, thereby has strengthened the radiation intensity of the first half, has improved the directionality of this electronic tag.
The utility model based on the directionality anti-metal electronic tag of PIFA in use, tear the silicone oil paper of 3M double faced adhesive tape 10, stick on the metal object to be identified, perhaps adopt screw to be fixed on the article to be measured and get final product through fixed orifice.
Claims (6)
1. directionality anti-metal electronic tag based on PIFA; At least comprise medium substrate and electronic label chip; It is characterized in that: the end face on the bottom surface of medium substrate and metal ground is pasted; Inverse-F antenna is positioned on the end face of medium substrate, and the end near the short circuit pin on the radiating doublet of inverse-F antenna is provided with two feed pin, is provided with the chip anchor point between two feed pin; On the bottom surface on feeding point and other conductor parts the chip anchor point and metal ground, be coated with epoxy resin layer on the end face of medium substrate; Electronic label chip is fixed in chip anchor point place, and the pin of electronic label chip is connected with two feed pin respectively, the short circuit pin pass behind inverse-F antenna, medium substrate and the metal ground with metal be fixedly connected.
2. the directionality anti-metal electronic tag based on PIFA according to claim 1 is characterized in that: said medium substrate is the FR4 substrate.
3. the directionality anti-metal electronic tag based on PIFA according to claim 1 is characterized in that: the epoxy resin layer and the Double-face gummed paper that are coated on the bottom surface on metal ground are pasted.
4. the directionality anti-metal electronic tag based on PIFA according to claim 1 is characterized in that: electronic tag is provided with two fixed orifices, and said fixed orifice is a through hole.
5. the directionality anti-metal electronic tag based on PIFA according to claim 1 and 2 is characterized in that: the shape size of medium substrate is complementary with the shape size on metal ground.
6. the directionality anti-metal electronic tag based on PIFA according to claim 1 is characterized in that: inverse-F antenna is copper antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203285122U CN202267981U (en) | 2011-09-02 | 2011-09-02 | Anti-metal electronic tag having directionality and based on PIFA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203285122U CN202267981U (en) | 2011-09-02 | 2011-09-02 | Anti-metal electronic tag having directionality and based on PIFA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267981U true CN202267981U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203285122U Expired - Fee Related CN202267981U (en) | 2011-09-02 | 2011-09-02 | Anti-metal electronic tag having directionality and based on PIFA |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202267981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647142A (en) * | 2013-11-21 | 2014-03-19 | 南京信息工程大学 | A double-frequency band MIMO inverted F antenna used for a WLAN and a WIMAX |
| CN111276810A (en) * | 2020-02-18 | 2020-06-12 | 环鸿电子（昆山）有限公司 | Chip antenna |
-
2011
- 2011-09-02 CN CN2011203285122U patent/CN202267981U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647142A (en) * | 2013-11-21 | 2014-03-19 | 南京信息工程大学 | A double-frequency band MIMO inverted F antenna used for a WLAN and a WIMAX |
| CN111276810A (en) * | 2020-02-18 | 2020-06-12 | 环鸿电子（昆山）有限公司 | Chip 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: 20120606 Termination date: 20200902 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |