CN101640313A - Coupled antenna device and radio frequency reading device - Google Patents
Coupled antenna device and radio frequency reading device Download PDFInfo
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- CN101640313A CN101640313A CN200810131173A CN200810131173A CN101640313A CN 101640313 A CN101640313 A CN 101640313A CN 200810131173 A CN200810131173 A CN 200810131173A CN 200810131173 A CN200810131173 A CN 200810131173A CN 101640313 A CN101640313 A CN 101640313A
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- radio frequency
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- coupled antenna
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Abstract
The invention provides a coupled antenna device and a radio frequency reading device. The coupled antenna device comprises a substrate, an antenna coil and a magnetizer. The antenna coil is spirally coiled in the surface of the substrate. The magnetizer is arranged in the surface of the substrate and is configured on the inner circumferential side of the antenna coil, wherein the ratio of the areaof the magnetizer to the coiling area of the antenna coil is between 1:2.6 and 1:3. In addition, the radio frequency reading device comprises a coupled antenna device and a reader, wherein the readerreads label data from the coupled antenna device. The area ratio between the material of the coupled antenna device and elements thereof can be changed so as to improve the coupling ability and further increase the distance at which the radio frequency reading device reads remote radio frequency signals without suffering interference from metals or magnetic materials.
Description
Technical field
The present invention relates to a kind of coupled antenna device and radio frequency reading device, relate in particular to the high coupling ability of a kind of tool and increase coupled antenna device and the radio frequency reading device that radiofrequency signal reads distance.
Background technology
Radio frequency identification system (the RadioFrequency Identification System that is called as one of big technology in this century most important preceding ten, RFID), begun slowly to enter in the middle of our daily life, and following every to the market or convenience store's shopping, library check out, take the vehicles, pay parking fee, carwash, mailing, permit identification or register to hospital and to lead medicine etc., none does not follow around we people not like the shadow following the personly.
So-called radio frequency identification system is a kind of wireless radio-frequency to be quoted at identity (Identification, ID) combination on the recognition function, it is to utilize a small electronic type label (RFIDTag) that data are back in the induction recognition system (RFID Reader) via radio-frequency technique, have compact, fast access to reach, multidata is handled, durability is high and the advantage of high-penetrability, very possible existing IC chip card, barcode device, gate inhibition's card or the animal chip of replacing on development in future ... Deng.
Though have above-mentioned advantage, present radio frequency identification system has following problem to need to solve, and uses with its more convenient society:
One, passive type radio frequency identification system transmission distance of reaction is not far.
Two, radio frequency identification system is disturbed by metal material or magnetic material easily, and then influences the transmission distance of reaction of radio frequency identifying antenna.
Therefore present many patents focus on the improvement of radio frequency identification system transmission distance of reaction, TaiWan, China patent announcement number for example: 00395027, promptly disclose a kind of " can supply insulating base Silicon Wafer and its manufacture method of the manufacturing of radio frequency integrated circuit elements ", it relates to a kind of improvement of insulating base of radio frequency integrated circuit element manufacturing, this piece patent characteristic is for imbedding the metal ground plane plate in the insulating barrier of insulating base, and replace silicon layer on the metal ground plane plate with the dielectric material of high-k and low dielectric loss, make radio frequency integrated circuit have good high frequency characteristics; The and for example application for a patent for invention of United States Patent (USP) No. 7298330 " RFID TAG WITH ENHANCED READABILITY ", disclose that a kind of wireless radio frequency identification mark is made up of in conjunction with a radio frequency identification system device a conductive material, the angle of the setting by changing conductive material and position or change the size of conductive material are with the induction range of increase wireless radio frequency identification mark.
Though above-mentioned patent application can reach the purpose that increases the transmission induction range, scrutinizes its technical characterictic and still can find some shortcomings: at first, the production method of above-mentioned patent application is too complicated, need expend a large amount of costs and time and make.Moreover the device of above-mentioned patent application still need be avoided the interference of metal material or magnetic material, otherwise the scope of transmission induction can be influenced, therefore can't utilize this metal material or this magnetic material manufacturing materials as this device.Therefore the inventor thinks that above-mentioned defective can improve, and proposes rationally a kind of and effectively improves the present invention of above-mentioned defective.
Summary of the invention
In view of this, the invention provides a kind of coupled antenna device and radio frequency reading device, wherein by the material of change coupled antenna device and the area ratio of its element, to improve coupling ability, and then increase the distance that radio frequency reading device reads the far end radio frequency signal, and the interference that is not subjected to metal or magnetic material.
Coupled antenna device of the present invention includes a substrate, an aerial coil and a magnetic conductor, wherein, aerial coil with helical coil in the face that is arranged on substrate.Magnetic conductor is arranged in the face of substrate, and magnetic conductor is disposed at interior all sides of aerial coil, and wherein, the area of magnetic conductor is between 1: 2.6 to 1: 3 for the area ratio that aerial coil centered on.
Radio frequency reading device of the present invention in order to read far-end one label data, comprises a substrate, an aerial coil, a magnetic conductor and a reader.Wherein, aerial coil with helical coil in the face that is arranged on substrate.Magnetic conductor is arranged in the face of substrate, and magnetic conductor is disposed at interior all sides of aerial coil, and wherein, the area of magnetic conductor is between 1: 2.6 to 1: 3 for the ratio of the area that aerial coil centered on.Reader is coupled to aerial coil, reads this label data by aerial coil.
So, coupled antenna device of the present invention is provided with a magnetic conductor in interior all sides of aerial coil, in order to the coupling ability of raising aerial coil, and then increases the distance that radio frequency reading device reads the far end radio frequency signal, simultaneously, magnetic conductor can be used for compensating the interference of metal or magnetic material.In addition, coupled antenna device of the present invention can center on the area ratio of scope by magnetic conductor on the adjustment coupled antenna device and aerial coil, with the scope of effective increase transmission induction when power output is constant.
Above general introduction and ensuing detailed description are exemplary in nature all, are in order to further specify claim scope of the present invention.And relevant other objects and advantages of the present invention will be set forth in follow-up explanation and diagram.
Description of drawings
Fig. 1 is the schematic top plan view of coupled antenna device of the present invention;
Fig. 2 is the schematic diagram of area ratio scope of the present invention; And
Fig. 3 is the circuit function block diagram of radio frequency reading device of the present invention.
Wherein, description of reference numerals is as follows:
1 coupled antenna device
10 substrates
12 aerial coils
14 magnetic conductors
2 readers
3 radio frequency reading devices
The S1 label data
Embodiment
Please refer to Fig. 1, be the schematic top plan view of coupled antenna device of the present invention.Coupled antenna device 1 comprises: a substrate 10, an aerial coil 12, an and magnetic conductor 14.Wherein, aerial coil 12 so helical coil are in the face that is arranged on substrate 10.And magnetic conductor 14 is set in the face of substrate 10 equally, and magnetic conductor 14 is disposed at interior all sides of aerial coil 12, simultaneously, the area ratio that the area of magnetic conductor 14 is centered on for aerial coil 12 is between 1: 2.6 to 1: 3, and this area ratio scope is an optimal proportion scope of the present invention.
In conjunction with Fig. 1, please refer to Fig. 2.Fig. 2 is the schematic diagram of area ratio scope of the present invention.In the optimal proportion scope, coupled antenna device 1 of the present invention can increase the transmission distance of reaction.Simultaneously, in preferred embodiment of the present invention, be that the best area of design magnetic conductor 14 is 33.6mm * 36.4mm, and the best area that aerial coil centered on is 60.8mm * 60.8mm, and under this best area, coupled antenna device of the present invention has longer transmission distance of reaction 160mm.Therefore, according to shown in Figure 2, the ratio of the area that area and the aerial coil 12 by magnetic conductor 14 surrounded can be adjusted the transmission distance of reaction of coupled antenna device 1 of the present invention.
Aforesaid aerial coil 12 can be metal material, magnetic material or conducting ceramic material with the material of magnetic conductor 14.Simultaneously, aerial coil 12 is to be wound with most circles with helical coil to be arranged in the face of substrate 10, and in design of the present invention, the area of magnetic conductor 14 is between 1: 2.6 to 1: 3 for the area ratio that aerial coil 12 outmost turns are centered on.
So, coupled antenna device 1 of the present invention is provided with magnetic conductor 14 by the interior all sides at aerial coil 12, simultaneously, the area of magnetic conductor 14 is designed between 1: 2.6 to 1: 3 for the area ratio that aerial coil 12 outmost turns are centered on, can effectively improve the coupling ability of aerial coil 12, and then improve the distance of radio signal transmission induction.Simultaneously, magnetic conductor 14 can also be used to compensating the interference of metal or magnetic material, is subjected to the interference of extraneous metal or magnetic material with the magnetic coupling of avoiding aerial coil 12.In addition, coupled antenna device 1 of the present invention can be by adjusting the magnetic conductor 14 and the area ratio of aerial coil 12 around scope on the coupled antenna device 1, to reach the purpose of effective increase transmission distance of reaction when power output is constant.
In conjunction with Fig. 1, please refer to Fig. 3.Fig. 3 is the circuit function block diagram of radio frequency reading device of the present invention.Radio frequency reading device 3 comprises a coupled antenna device 1 and a reader 2, and wherein, reader 2 is the aerial coils 12 that are coupled to coupled antenna device 1.Coupled antenna device 1 is obtained a label data S1 by the mode of magnetic coupling (Magnetic Coupling) from far-end, and reader 2 reads and discern this label data S1 from what aerial coil 12 carried out this label data S1 immediately.
So, radio frequency reading device 3 has used has the coupled antenna device 1 that high coupling ability and compensation metal or magnetic material disturb, and is effectively to increase the distance that radio frequency reading device 3 reads the far end radio frequency signal.
Therefore, coupled antenna device of the present invention and radio frequency reading device have characteristics described as follows: 1. use magnetic material, conducting ceramic material or metal material to be used as the material of coupled antenna device, can effectively increase the magnetic coupling amount, make the transmission distance of reaction increase.2. the ratio of the area that area and aerial coil surrounded by changing magnetic conductor, when coupled antenna device when power output is constant, transmission distance of reaction far away also can be arranged.3. increase the distance that radio frequency reading device reads the far end radio frequency signal, and the interference that is not subjected to metal or magnetic material.
In sum, coupled antenna device 1 of the present invention is placed with the magnetic conductor 14 of metal material, magnetic material or ceramic material in aerial coil 12, with the magnetic coupling amount of increase aerial coil 12 magnetic induction, and then the coverage of increase radio frequency reading device 3 reading of data.The principle that the present invention used is because the mode that reads of aerial coil 12 adopts coupling (Coupling) mode, and utilization aerial coil 12 couple currents produce magnetic, and far-end label magnetic produces little current drives chip (Chip) and does recognized action.Therefore, the present invention is sidelong in aerial coil 12 and puts magnetic conductor 14 in week, promptly can effectively increase the magnetic coupling amount of aerial coil 12, and to produce bigger magnetic flux, the distance of the magnetic induction that makes increases, and relative also is to read distance to increase.
So, the present invention designs the area of magnetic conductor 14 between 1: 2.6 to 1: 3 for the area ratio that aerial coil 12 is centered on, and will have preferable distance of reaction.This area ratio is an optimal proportion scope of the present invention, promptly can improve the usefulness and the magnetic coupling amount of aerial coil 12, effectively read distance with what increase radio frequency reading device 3 reading tag data S1, simultaneously, also can effectively solve the problem that prior art is subjected to extraneous metal or the interference of magnetic material easily.
The above only is the specific embodiment of the best of the present invention, but feature of the present invention is not limited thereto, any those of ordinary skills in the field of the invention, can think easily and variation or modification, all can be encompassed in the application's the claim scope.
Claims (10)
1. a coupled antenna device is characterized in that, comprising:
One substrate;
One aerial coil, with helical coil in the face that is arranged on this substrate; And
One magnetic conductor is arranged in the face of this substrate, and this magnetic conductor is disposed at interior all sides of this aerial coil, and wherein, the area of this magnetic conductor is between 1: 2.6 to 1: 3 for the area ratio that this aerial coil centered on.
2. coupled antenna device as claimed in claim 1 is characterized in that, the best area of this magnetic conductor is 33.6mm * 36.4mm, and the best area that this aerial coil centered on is 60.8mm * 60.8mm.
3. coupled antenna device as claimed in claim 1 is characterized in that, the material of this aerial coil is metal material, magnetic material or conducting ceramic material.
4. coupled antenna device as claimed in claim 1 is characterized in that, the material of this magnetic conductor is metal material, magnetic material or conducting ceramic material.
5. coupled antenna device as claimed in claim 1 is characterized in that, this aerial coil has most circles, and the area of this magnetic conductor is between 1: 2.6 to 1: 3 for the area ratio that this aerial coil outmost turns is centered on.
6. a radio frequency reading device in order to read far-end one label data, is characterized in that, comprising:
One substrate;
One aerial coil, with helical coil in the face that is arranged on this substrate;
One magnetic conductor is arranged in the face of this substrate, and this magnetic conductor is disposed at interior all sides of this aerial coil, and wherein, the area of this magnetic conductor is between 1: 2.6 to 1: 3 for the ratio of the area that this aerial coil centered on; And
One reader is coupled to this aerial coil, and this reader reads this label data by this aerial coil.
7. radio frequency reading device as claimed in claim 6 is characterized in that, the best area of this magnetic conductor is 33.6mm * 36.4mm, and the best area that this aerial coil centered on is 60.8mm * 60.8mm.
8. radio frequency reading device as claimed in claim 6 is characterized in that, the material of this aerial coil is metal material, magnetic material or conducting ceramic material.
9. radio frequency reading device as claimed in claim 6 is characterized in that, the material of this magnetic conductor is metal material, magnetic material or conducting ceramic material.
10. radio frequency reading device as claimed in claim 6 is characterized in that, this aerial coil has most circles, and the area of this magnetic conductor is between 1: 2.6 to 1: 3 for the area ratio that this aerial coil outmost turns is centered on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810131173A CN101640313A (en) | 2008-07-30 | 2008-07-30 | Coupled antenna device and radio frequency reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810131173A CN101640313A (en) | 2008-07-30 | 2008-07-30 | Coupled antenna device and radio frequency reading device |
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| Publication Number | Publication Date |
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| CN101640313A true CN101640313A (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810131173A Pending CN101640313A (en) | 2008-07-30 | 2008-07-30 | Coupled antenna device and radio frequency reading device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013063979A1 (en) * | 2011-10-31 | 2013-05-10 | 深圳市新国都技术股份有限公司 | Sensing structure and pos machine with magnetizer |
| CN104657697A (en) * | 2010-08-12 | 2015-05-27 | 株式会社村田制作所 | Communication terminal |
-
2008
- 2008-07-30 CN CN200810131173A patent/CN101640313A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104657697A (en) * | 2010-08-12 | 2015-05-27 | 株式会社村田制作所 | Communication terminal |
| CN104657697B (en) * | 2010-08-12 | 2017-10-31 | 株式会社村田制作所 | Communication terminal |
| WO2013063979A1 (en) * | 2011-10-31 | 2013-05-10 | 深圳市新国都技术股份有限公司 | Sensing structure and pos machine with magnetizer |
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