CN201142165Y - Ultrahigh-frequency electronic label - Google Patents
Ultrahigh-frequency electronic label Download PDFInfo
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- CN201142165Y CN201142165Y CNU2007200775369U CN200720077536U CN201142165Y CN 201142165 Y CN201142165 Y CN 201142165Y CN U2007200775369 U CNU2007200775369 U CN U2007200775369U CN 200720077536 U CN200720077536 U CN 200720077536U CN 201142165 Y CN201142165 Y CN 201142165Y
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- electronic tag
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- chip
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Abstract
An UHF electronic tag includes a basis material, a chip, a feed line, and an antenna receiving/sending face, which are arranged on the same face of the basis material, and the basis material face is the front face of the electronic tag; an antenna grounding face is arranged on another face of the basis material, which is the back face of the electronic tag. The antenna receiving/sending face on the front face forms a micro-strip antenna with the antenna grounding face on the back face via a short groove. The chip is connected with the antenna receiving/sending face via the feed line, and the grounding end of the chip is connected with the antenna grounding face on the back face via a through hole. The antenna grounding face on the back face is directly contacted with the surface of the metal material of the electronic tag. The back face of the electronic tag is the grounding face, so that the shielding effect of the metal material surface is not taken into account. The arrangement of the short groove enables the area of the micro-strip antenna to be reduced by half, so that the size of the electronic tag is reduced.
Description
Technical field
The utility model relates to a kind of ultrahigh frequency electronic tag (RFID), is specially adapted to the surface of metal material
Background technology
RFID (electronic tag) technology is to utilize radiofrequency signal to realize that by the space coupling non-contact information transmission and the information of passing through to be transmitted reach the technology of identifying purpose, is concrete application and the development of automatic identification technology aspect the radio microwave technology.As this technology that can gather quickly and accurately with process information, by universally acknowledged be one of the ten big important technologies of 21st century, it is a revolutionary new technology that influences global economy and people's life after mobile communication technology, Internet technology that the expert is referred to as.Its distinctive waterproof, antimagnetic, high temperature resistant, long service life, read that distance is big, label data can encrypt, store that data capacity is big, the canned data change waits advantage freely, the RFID technology is all had broad application prospects at the manufacturing, communications and transportation, circulation retail, logistics and supply chain, safety anti-fake, personnel and aspects such as animal tracking and supervision, become gradually and improve the logistics supply chain management level, reduce cost, realize the indispensable instrument and the means of IT application in management, the systemic circulation of participation international economy, strengthen core competitiveness.
China is also very fast in the development of RFID technical elements, at first, changed just in China by the second generation resident identification card that government carries out, be only to 2008 and will use more than 800,000,000 RFID chip on I.D., the quantity of this employed RFID chip is leading in the world; Secondly, aspects such as some local governments (as Chinese Shanghai) are open to the custom toll management, gate inhibition, safety management, fireworks and firecrackers is false proof, the hazardous gas steel cylinder is false proof have extensively adopted the RFID technology, not only improve work efficiency, also strengthened the dynamics of supervision, obtained the achievement that attracts people's attention.
Basic rfid system comprises three parts such as RFID electronic tag, rfid interrogator and application support programs.RFID (electronic tag) is according to the mode difference that sends radiofrequency signal, is divided into active and two kinds of passive types.Here just at passive type RFID (electronic tag), its principle of work is roughly: rfid interrogator control radio-frequency module reads signal to the label emission, and RFID (electronic tag) provides answer signal after receiving the electromagnetic wave signal of read write line emission; Read write line receives the answer signal of label, the object id information of label is decoded, and other related information transmission on the related label of this information is carried out follow-up processing to background server.
From concrete application facet, the RFID technology has remarkable advantages in the following aspects: the one, and RFID utilization radio-frequency technique can be carried out remote, contactless read-write; The 2nd, it is not subject to the influence of external environment, still can keep its serviceability under general rugged surroundings such as dust, moist environment; The 3rd, can carry out the storage and the modification of information; The 4th, can use repeatedly, data storage can be preserved 10 years, and repetitive read-write is greater than 100,000 times.RFID itself have safety, accurately, fast, fundamental such as low consumption, desirable information carrier is provided, by read write line, can under minimum manual intervention, tell people inquisitive information.
At present, the applied environment of RFID electronic tag is more and more wider, can run into the metal species material inevitably, as container body, dangerization product steel cylinder bottle, plant equipment etc.In general, be difficult to use the RFID electronic tag on the metal species material, and the high more influence of the frequency of label is big more, this is because metal material has shielding action to electromagnetic wave, the RFID electronic tag that is attached on the metal surface is difficult to intactly receive the signal that read write line emits, and causes it to lose function.According to the characteristic of RFID electronic tag frequency, its frequency is high more, then is subjected to the influence of metal species material just remarkable more.
At present, at metal species material surface applying RFID, the common practices in the industry is: at RFID be mounted the Ferrite Material of putting into one deck high magnetic permeability between object (metal) surface of label, make metal material influence its shielding action and reduce.But owing to the diversity of RFID applied environment, the otherness of surface characteristics of metal, the Ferrite Material characteristic that different materials supplier provides also varies, these bring a lot of inconvenience all for follow-up processing, general all is to test the Ferrite Material of determining to select for use which kind of model by the matching of reality, carries out the test of repeated multiple times back and forth.And the cost of Ferrite Material itself is also higher.Be subjected to the restriction of extraneous environment for use, final RFID product differs and satisfies client's actual request for utilization surely fully, is unfavorable for wideling popularize of RFID product.
Summary of the invention
The purpose of this utility model solves the shortcoming that exists described in the top background technology, exactly for being applied in a kind of simple in structure, the economical and practical ultrahigh frequency electronic tag on the metal object surface.
The utility model is the purpose that reaches above-mentioned, and the technical scheme of being taked provides a kind of ultrahigh frequency electronic tag, comprising:
Base material places the chip of the electronic tag on the base material,
One microstrip antenna is made of the antenna reception/surface of emission, antenna ground face and feeder line.Antenna reception/the surface of emission is seated in the one side that is equipped with chip and feeder line on the base material, and this face is as the front of electronic tag; The antenna ground face is seated in the another side of base material, and this face is the back side of electronic tag.Antenna reception/the surface of emission is connected with chip by feeder line, and the back side that base material is equipped with this one side-electronic tag of antenna ground face directly contacts the surface of the metal material that uses electronic tag;
Short slot is arranged on the base material, and the antenna reception/surface of emission is connected with antenna ground face on the electronic tag back side by this short slot;
Through hole is arranged on the base material, and the ground wire of chip is connected with antenna ground face on the electronic tag back side by this through hole.
The effect that the utility model is used for the RFID (electronic tag) on the metal material surface is remarkable.
RFID of the present utility model such as above-mentioned structure, the another side of base material is the antenna ground face on (back side of electronic tag).Principle of work according to microstrip antenna, do not need to consider the shielding action of metal material surface fully, because the back side of electronic tag itself is exactly ground plane, contacting with the metal surface has also just increased contact area, and can not have influence on the effect of microstrip antenna and the performance of electronic tag.This is the great advantage of ultrahigh frequency electronic tag (RFID) product that the utlity model has this microstrip antenna structure.
As above-mentioned structure of the present utility model, consider that the size of ultrahigh frequency RFID will adapt to the miniaturization of existing market demand, the utility model on base material specialized designs a short slot, by this short slot the antenna reception/surface of emission of microstrip antenna and the antenna ground face on its back side are linked together, can dwindle whole microstrip antenna area, also reduce with regard to the size that makes RFID.For example, compare with the microstrip antenna that short slot is not set for the microstrip antenna that is provided with short slot that plays same purpose, according to determining of the frequency of operation (915MHz) of an electronic tag, the length of the antenna reception/surface of emission of microstrip antenna is limited by its half-wavelength, again because the antenna ground face of microstrip antenna and the antenna reception/surface of emission also must stay enough gaps to guarantee radiation efficiency.The area of the antenna reception/surface of emission of so last design is 12cm * 8cm.And when being provided with after the short slot, the area of the antenna reception/surface of emission is reduced into 8cm * 6cm.The area that promptly is provided with the microstrip antenna of short slot can dwindle one times approximately than the area of the microstrip antenna that does not have short slot.Thereby the size of electronic tag also just can be dwindled greatly.
As the structure of above-mentioned the utility model RFID as can be seen, it is simple in structure, and figure, lines are also more single.Therefore, manufacturing process is simple relatively, and basic with ripe at present printed circuit board (PCB) (PCB) manufacture craft is similar, and this also offers convenience for follow-up production in enormous quantities processing.
Description of drawings
Fig. 1 is the electronic tag Facad structure synoptic diagram of the utility model electronic tag one embodiment;
Fig. 2 is the electronic tag structure synoptic diagram of the utility model electronic tag one embodiment.
Embodiment
Further specify the architectural feature of the utility model RFID below in conjunction with accompanying drawing.
As shown in Figure 1, 2, RFID of the present utility model comprises: base material 1, place the chip 4 of the electronic tag on the base material 1, and be connected the feeder line 5 on the chip 4,
One microstrip antenna is made of the antenna reception/surface of emission 2 (Fig. 1 shows), antenna ground face 6 (Fig. 2 shows) and feeder line 5 (Fig. 1 shows).Antenna reception/the surface of emission 2 is seated in the one side that is equipped with chip 4 and feeder line 5 on the base material 1, and this substrate surface is the front 101 (Fig. 1 shows) of electronic tag; Antenna ground face 6 is seated in the another side of base material 4, and this substrate surface is the back side 102 (Fig. 2 shows) of electronic tag; Antenna reception/the surface of emission 2 is connected with chip 4 by feeder line 5, and the back side 102 that is equipped with the electronic tag of antenna ground face 6 directly contacts the surface of the metal material that uses this electronic tag;
Be arranged on the short slot 3 on the base material 1, the antenna reception/surface of emission 2 is connected with antenna ground face 6 on the back side 102 by this short slot 3;
Be arranged on the through hole 7 on the base material 1, the earth terminal of chip 4 is connected with antenna ground face 6 on the back side 102 by this through hole 7.
In the present embodiment, the antenna reception/surface of emission 2 of microstrip antenna and antenna ground face 6 constitute by Copper Foil (covering copper).Be conductor sheet (general Copper Foil).It utilizes the feeder line feed of microstrip line (or coaxial cable), has encouraged radio frequency electromagnetic field between conductor sheet and conductive earthing face, and by conductor sheet (the antenna reception/surface of emission) all around and the slit between conductive earthing face (antenna ground face) to external radiation.
This antenna of the present utility model (as Fig. 1,2), its substrate are that a slice has certain thickness base material 1.Find that according to test findings the thickness of base material 1 is greater than 1mm at least, could reduce the loss of antenna energy so as much as possible.When making microstrip antenna, cover copper simultaneously on the two sides of base material 1, one side etches the figure of the antenna reception/surface of emission 2 of the microstrip antenna that designs, whole antenna ground face 6 as microstrip antenna of another side.Then, chip 4 is seated on 1 of the base material that is carved with the antenna reception/surface of emission, this face is as the front of electronic tag; Two connectivity ports of chip 4 (particular location of connectivity port is relevant with the model of selecting different chips) are connected with the antenna ground face with the antenna reception/surface of emission of microstrip antenna respectively, concrete connection is that a port of chip 4 links to each other with the antenna reception/surface of emission 2 by feeder line 5, and the another port of chip 4 (ground connection) links to each other with the antenna ground face 6 at the back side by through hole 7.
The position of feeder line 5, size have direct related with the input impedance of chip 4.The general antenna commonly used to all the winds radiation pattern of emittance (Radiation Pattern) is described antenna performance, and this is to be example with the circular antenna, is a kind of mode that the aerial radiation characteristic description is become spatial function.When the frequency shift of radiofrequency signal on the feeder line 5, the resistance value of entire antenna also changes thereupon.Therefore, the consideration of appropriate signals feed-in mode and impedance matching, can so that entire antenna when resonant frequency, all projectile energies can both radiate.The designing and calculating of the special Designer Antenna Design simulation software that the design of feeder line can provide by Ansoft company obtains.
In the present embodiment; the utility model also considers to be covered with on the surface of label the diaphragm of environment-friendly materials (PET); this is for the copper layer that covers that prevents ultrahigh frequency electronic tag contacts phenomenons such as oxidation, corrosion take place with external environment, to satisfy long-term stability and the serviceable life of electronic tag in application circumstances.
In the present embodiment, the utility model also considers to adopt hard brittle material to seal the big envelope of ultrahigh frequency electronic tag integral body.Purpose is to reach disposable use, the anti-characteristic that shifts.Because big envelope is a hard brittle material, so after ultrahigh frequency electronic tag is fixed on body surface, just it intactly can't be taken off once more and move and do its and use.
Claims (5)
1. a ultrahigh frequency electronic tag comprises base material, places the chip of the electronic tag on the base material, it is characterized in that comprising:
One microstrip antenna is made of the antenna reception/surface of emission, antenna ground face and feeder line, and the antenna reception/surface of emission and feeder line are seated in the one side that is equipped with chip on the base material, and this face is as the front of electronic tag, and the antenna reception/surface of emission is connected with chip by feeder line; The antenna ground face is seated in the another side of base material, and this one side that base material is equipped with the antenna ground face directly contacts the surface of the metal material that uses electronic tag as the back side of electronic tag;
Short slot is arranged on the base material, and the antenna reception/surface of emission is connected with antenna ground face on the electronic tag back side by this short slot;
Through hole is arranged on the base material, and the earth terminal of chip is connected with antenna ground face on the electronic tag back side by this through hole.
2. ultrahigh frequency electronic tag according to claim 1 is characterized in that described short slot is a groove, or an exhausting hole.
3. ultrahigh frequency electronic tag according to claim 1 is characterized in that also comprising covering the lip-deep diaphragm of electronic tag.
4. ultrahigh frequency electronic tag according to claim 1 is characterized in that also comprising by hard brittle material being encapsulated in big envelope on the electronic tag.
5. ultrahigh frequency electronic tag according to claim 1, the thickness that it is characterized in that described base material is greater than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200775369U CN201142165Y (en) | 2007-12-28 | 2007-12-28 | Ultrahigh-frequency electronic label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200775369U CN201142165Y (en) | 2007-12-28 | 2007-12-28 | Ultrahigh-frequency electronic label |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201142165Y true CN201142165Y (en) | 2008-10-29 |
Family
ID=40069875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200775369U Expired - Lifetime CN201142165Y (en) | 2007-12-28 | 2007-12-28 | Ultrahigh-frequency electronic label |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201142165Y (en) |
-
2007
- 2007-12-28 CN CNU2007200775369U patent/CN201142165Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI FUDAN MICROELECTRONICS GROUP COMPANY LIMI Free format text: FORMER NAME: FUDAN MICROELECTRONICS CO., LTD., SHANGHAI |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200433 building 127, 4 Cathay Pacific Road, Shanghai, Yangpu District Patentee after: Shanghai Fudan Microelectronic Group Co., Ltd. Address before: 200433 building 127, 4 Cathay Pacific Road, Shanghai, Yangpu District Patentee before: Fudan Microelectronics Co., Ltd., Shanghai |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |
|
| CX01 | Expiry of patent term |