CN103530683A - High-sensitivity radio frequency tag - Google Patents
High-sensitivity radio frequency tag Download PDFInfo
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- CN103530683A CN103530683A CN201310538695.4A CN201310538695A CN103530683A CN 103530683 A CN103530683 A CN 103530683A CN 201310538695 A CN201310538695 A CN 201310538695A CN 103530683 A CN103530683 A CN 103530683A
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- external coil
- tag
- label
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- match circuit
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Abstract
The invention relates to the technical field of RFID (Radio Frequency Identification), in particular to a high-sensitivity radio frequency tag which can improve the tag gain greatly and improve the tag reading sensitivity further under the condition that the tag material is not changed. The high-sensitivity radio frequency tag comprises a chip and an external coil connected with the chip, and is characterized in that the high-sensitivity radio frequency tag is further provided with a matching circuit connected with the external coil; a capacitor is arranged in the matching circuit; two ends of the capacitor are connected with two ends of the external coil respectively; the capacitor and a resistor which are connected in series are arranged in the matching circuit; and two ends of the matching circuit are connected with two ends of the external coil respectively. Compared with the prior art, the high-sensitivity radio frequency tag has the advantages as follows: the size of the tag is minimized, the gain is high, and the performance is good.
Description
Technical field
The present invention relates to radio-frequency (RF) identification (RFID, Radio Frequency Identification) technical field, specifically realize in the situation that label material is constant, larger raising label gain, and then lifting label reads the high sensitivity radio-frequency (RF) tag of sensitivity.
Background technology
Radio-frequency (RF) identification is a kind of non-contacting automatic identification technology, and radio-frequency recognition system mainly comprises read write line, antenna and radio-frequency (RF) tag to be read.During work, read write line is outwards launched magnetic field by antenna, radio-frequency (RF) tag is obtained energy and is activated by carrying out mutual inductance with magnetic field, information after being activated in radio-frequency (RF) tag can return to antenna and read write line by magnetic field, read write line can be decoded according to the signal receiving, and decoded information is label information.
Existing radio-frequency (RF) tag mainly comprises external coil and chip two parts, and wherein external coil forms after wire is coiled into a fixing turn, produces certain inductance value, cooperatively interact with chip internal electric capacity, by label frequency resonance at 13.56M.The performance of radio-frequency (RF) tag is relevant with the Q value of label with label sizes, and in general label sizes is larger, and tag performance is better.
But in some applications; as done washing, industry need to sew up in clothes by label, student comes in and goes out, and safety management field need to be made label in the running label and other sundry assets management projects of using in school badge pattern, motion timing project, need in the relatively-stationary situation of label sizes, can reach higher performance by label.The performance of high-frequency label depends on the coil dimension of high-frequency label, the gain of label etc., and in general, the area of the external coil of high-frequency label is larger, and the label energy that mutual inductance absorbs in field region is larger, and label is more easily activated; The gain of label is larger, and the label needed energy that is activated is less, and the performance of label is higher.In the situation that area is certain, if need to increase tagged performance, need to improve the gain of label.In the prior art, after the material of external coil and wire diameter are determined, the gain of label is substantially definite, cannot improve preferably label gain, the poor-performing of label.
Summary of the invention
The present invention is directed to that the gain of radio-frequency (RF) tag in prior art is low, the problem of poor performance, propose a kind of raising label gain that can be larger, and then promote label and read the high sensitivity radio-frequency (RF) tag of sensitivity.
The present invention can reach by following measures:
A radio-frequency (RF) tag, comprises chip and the external coil being connected with chip, it is characterized in that being also provided with the match circuit in parallel with external coil.
Chip of the present invention can adopt any 15693 family chips, wherein chip internal be provided with for the treatment of the signal processing circuit of field signal and be connected with signal processing circuit for storing the EEPROM of radio-frequency (RF) tag information.
Described in the present invention, in match circuit, be provided with electric capacity, the two ends of electric capacity are connected with the two ends of external coil respectively, realize in parallelly with external coil, and then time coordinate external coil resonance to 13.56MHz in work.
The electric capacity, the resistance that described in the present invention, in match circuit, are provided with series connection, match circuit two ends are connected with the two ends of external coil respectively, realize in parallelly with external coil, and then time coordinate external coil resonance to 13.56MHz in work.
Described in the present invention, in match circuit, be provided with electric capacity in parallel and resistance, the two ends of match circuit are connected with the two ends of external coil respectively, realize in parallelly with external coil, and then time coordinate external coil resonance to 13.56MHz in work.
Chips of the present invention is connected with external coil by pad, and described external coil is formed by wire coiling, produces inductance value when work.
The present invention compared with prior art, has the following advantages:
1. realize label small-sized: by improving the gain of label, promoted the performance of label, thereby under identical performance condition, reduced the size of label.
2. the gain of label is high, performance good; By increasing match circuit, improve the gain of label, and then greatly reduced the needed energy of activation label, promoted the performance of label.
accompanying drawing explanation:
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is a kind of structural representations of match circuit in the present invention.
Accompanying drawing 3 is another kind of structural representations of match circuit in the present invention.
Accompanying drawing 4 is the third structural representations of match circuit in the present invention.
Reference numeral: external coil 1, match circuit 2, chip 3, pad 4.
embodiment:
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, the present invention proposes a kind of high sensitivity radio-frequency (RF) tag, comprise chip 3 and the external coil 1 being connected with chip 3, it is characterized in that being also provided with the match circuit in parallel with external coil 12.
Chip of the present invention can adopt any 15693 chips, be wherein provided with for the treatment of the signal processing circuit of field signal and be connected with signal processing circuit for storing the EEPROM of radio-frequency (RF) tag information.
As shown in Figure 2, in match circuit described in the present invention 2, be provided with electric capacity, the two ends of match circuit 2 are connected with the two ends of external coil 1 respectively, realize in parallelly with external coil 1, and then time coordinate external coil 1 resonance to 13.56MHz in work.
As shown in Figure 3, be provided with electric capacity, the resistance of series connection in match circuit described in the present invention 2, match circuit 2 two ends are connected with the two ends of external coil 1 respectively, realize in parallelly with external coil 1, and then time coordinate external coil 1 resonance to 13.56MHz in work.
As shown in Figure 4, be provided with electric capacity in parallel and resistance in match circuit described in the present invention 2, the two ends of match circuit 2 are connected with the two ends of external coil 1 respectively, realize in parallelly with external coil 1, and then time coordinate external coil resonance to 13.56MHz in work.
The present invention in use, because the internal capacitance of chip 3 is certain, therefore as need be by label resonance at 13.56MHZ, required external coil 1 is certain, match circuit 2 is by parallel with chip 3, in a disguised form increased the internal capacitance of chip 3, the number of turns of label external coil 1 under equal conditions can be reduced, Coil resistance reduces; Match circuit 2, by parallel with external coil 1, after active component and coils from parallel connection of coils, has in a disguised form reduced the internal resistance of external coil 1; Thereby label Q value is promoted, after label Q value promotes, activate the required energy of label and tail off, so tag performance promotes.
The present invention compared with prior art, have can realize label small-sized, high, the advantage such as performance is good gains.
What embodiments of the invention were announced is its preferably embodiment, but is not limited to this.Those of ordinary skill in the art, very easily according to above-described embodiment, understands spirit of the present invention, and makes different amplifications and industrialization, but only otherwise within departing from the spirit and principles in the present invention, all within protection scope of the present invention.
Claims (5)
1. a high sensitivity radio-frequency (RF) tag, comprises chip and the external coil being connected with chip, it is characterized in that being also provided with the match circuit in parallel with external coil.
2. a kind of high sensitivity radio-frequency (RF) tag according to claim 1, it is characterized in that described chip adopts 15693 chips, be wherein provided with for the treatment of the signal processing circuit of field signal and be connected with signal processing circuit for storing the EEPROM of radio-frequency (RF) tag information.
3. a kind of high sensitivity radio-frequency (RF) tag according to claim 2, is characterized in that being provided with electric capacity in described match circuit, and the two ends of electric capacity are connected with the two ends of external coil respectively.
4. a kind of high sensitivity radio-frequency (RF) tag according to claim 2, is characterized in that being provided with in described match circuit electric capacity, the resistance of series connection, and match circuit two ends are connected with the two ends of external coil respectively.
5. a kind of high sensitivity radio-frequency (RF) tag according to claim 2, is characterized in that being provided with electric capacity in parallel and resistance in described match circuit, and the two ends of match circuit are connected with the two ends of external coil respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538695.4A CN103530683A (en) | 2013-11-05 | 2013-11-05 | High-sensitivity radio frequency tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538695.4A CN103530683A (en) | 2013-11-05 | 2013-11-05 | High-sensitivity radio frequency tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103530683A true CN103530683A (en) | 2014-01-22 |
Family
ID=49932676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310538695.4A Pending CN103530683A (en) | 2013-11-05 | 2013-11-05 | High-sensitivity radio frequency tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103530683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108577986A (en) * | 2018-05-21 | 2018-09-28 | 上海数斐信息科技有限公司 | A kind of RF tag mounting assembly, installation method and instrument |
-
2013
- 2013-11-05 CN CN201310538695.4A patent/CN103530683A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108577986A (en) * | 2018-05-21 | 2018-09-28 | 上海数斐信息科技有限公司 | A kind of RF tag mounting assembly, installation method and instrument |
| CN108577986B (en) * | 2018-05-21 | 2024-04-23 | 赛斐信息科技(南通)有限公司 | Radio frequency tag installation assembly, installation method and apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140122 |
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| WD01 | Invention patent application deemed withdrawn after publication |