CN201466215U - Electronic tag antenna - Google Patents
Electronic tag antenna Download PDFInfo
- Publication number
- CN201466215U CN201466215U CN2009200672766U CN200920067276U CN201466215U CN 201466215 U CN201466215 U CN 201466215U CN 2009200672766 U CN2009200672766 U CN 2009200672766U CN 200920067276 U CN200920067276 U CN 200920067276U CN 201466215 U CN201466215 U CN 201466215U
- Authority
- CN
- China
- Prior art keywords
- antenna
- broken line
- inductive loop
- electronic label
- main radiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses an electronic tag antenna. An inductive loop is square. The middle of the first long side of the inductive loop is disconnected to form the two ports of the antenna. The two ports are connected with the chip of the electronic tag. The main radiating body of the antenna comprises bended lines with different widths. A thinnest first bended line is adjacent to the second long side of the inductive loop. The main radiating body of the antenna is bended towards the short sides of the inductive loop respectively from the two ends of the first bended line to form two second bended lines. The main radiating body of the antenna is bended respectively towards the left and the right of the upper ends of the two second bended lines to form two third bended lines. The main radiating body of the antenna is bended back to the center of the antenna from the two ends to form two fourth bended lines. The utility model has the advantages that proper balance is kept between the area and the performance of the antenna, the structure is beautiful and the characters or patterns in the antenna can publicize the enterprise.
Description
Technical field
The utility model relates to antenna technology, particularly a kind of electronic label antenna, and this antenna comprises inductive loop and main radiator.
Background technology
Non-contacting recognition system is called radio-frequency recognition system (RFID-Radio FrequencyIdentification), RFID is that a kind of radio wave that utilizes is read and write programmed recording medium, radio-frequency technique is combined with the IC-card technology and can be used for the technology of remote, moving-target, wireless identification.Rfid system generally all is made up of transponder, reader and PC.
Antenna is a critical component in radio communication and the radar system as the equipment of a kind of reception and launching electromagnetic wave, and it is the interface of free space and transmission line, is commonly referred to " electronic eyes " or " electronic ear ".
In order to reduce cost, electronic tag often adopts and prints on paper or the plastic film, and label is attached to and means to have different resonance frequencys on the different objects like this.The environment of periphery is also bigger to the resonance frequency influence of electronic tag.Also having the frequency range of the electronic tag of hyperfrequency is 860MHz-960MHz, and such frequency band than broad can guarantee that electronic tag can use in any country, and country variant uses certain frequency band wherein.It is very necessary designing wide band electronic label antenna for this reason.Shown in Fig. 1 a～Fig. 1 d, the most frequently used form of electronic label antenna is half-wave dipole or short dipole, but its frequency band is not wide relatively.
The cost of electronic tag comprises chip, antenna and three parts of encapsulation.Wherein the cost of antenna is directly related with the area of antenna.But the small size antenna often means low performance.Electronic tag popularize need be lower price, the label that therefore designs low-cost and high-performance is pursuing one's goal of Antenna Design person.
The utility model content
For overcoming the deficiency of above-mentioned prior art, the technical problems to be solved in the utility model provides a kind of high-performance, electronic label antenna cheaply, and this antenna is long strip type.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of electronic label antenna comprises inductive loop and main radiator, and the length of antenna is less than the half-wavelength of its work.
Described inductive loop is rectangle, and is separated in the first long limit of inductive loop, forms two ports of antenna, and these two ports are connected with the chip of electronic tag;
The main radiator of antenna comprises the broken line of different live widths, and the second long limit of first wherein the thinnest broken line and inductive loop is adjacent, and the length of first broken line is greater than the length on the inductive loop second long limit;
The main radiator of antenna bends to the short side direction of inductive loop respectively from the two ends of first broken line, forms two section second broken line, and the length of second broken line is greater than the length of inductive loop minor face;
The main radiator of antenna forms two sections tri linears from the upper end bending to the left and right respectively of two section second broken line; The main radiator of antenna is turned back to center of antenna from two ends, forms two section the 4th broken line.
The second long limit of main radiator and inductive loop is by the form interactive information and the transmission energy of inductance coupling high.
The induction reactance numerical value of inductive loop equals the absolute value of the reactance imaginary part of electronic label chip.
Literal is arranged at the top on the first long limit of inductive loop, comprises the literal of hollow out on the antenna metal or the literal main body of using the antenna metal directly to constitute.
First broken line is parallel with the second long limit of inductive loop.
The 4th broken line is parallel with tri linear respectively.
Described two ends are pattern or literal, are formed or are used the antenna metal directly to constitute by hollow out on the antenna metal.
The width of tri linear is greater than the width of second broken line.
The width of the 4th broken line is greater than the width of tri linear.
Compared with prior art, the beneficial effects of the utility model are:
This new antenna can reduce the physical length of antenna by the broken line form of main radiator, and then reduces the area of antenna.By the different live widths of main radiator broken line part, when increasing the coupling of main radiator and inductive loop, can further reduce the area of antenna, increase the radiation resistance of antenna, and then increase the efficient of antenna.In sum, this new antenna can realize the reasonable compromise between relatively little area (being that the antenna cost is low) and the performance, also can have beautiful version simultaneously.Simultaneously, add literal or pattern in this new antenna and can play certain enterprises propagandist effect.
Description of drawings
Fig. 1 a is conventional half-wave dipole antenna schematic diagram;
Fig. 1 b is the antenna structure view that conventional dipole antenna two ends load with horizontal line;
Fig. 1 c is the antenna structure view that conventional dipole antenna two ends load with broken line;
Fig. 1 d is the conventional terminal antenna schematic diagram that loads with the rectangle conductor of dipole antenna;
Fig. 2 is the structural representation of the utility model electronic label antenna;
Fig. 3 is the return loss plot figure between the utility model electronic label antenna and the chip.
Embodiment
Below in conjunction with drawings and Examples embodiment of the present utility model is further described in detail, but should limit protection range of the present utility model with this.
See also Fig. 2.This novel electronic label antenna comprises inductive loop 20 and main radiator.
The length of antenna is less than the half-wavelength of its work, and width is moderate, and the working band of antenna and efficient are all fine.
Described inductive loop 20 is rectangle, separated in the first long limit of inductive loop, form two ports 221,222 of antenna, these two ports are connected with the chip direct physical of electronic tag, and location mark 23 was positioned at inductive loop inside when antenna and chip carried out mechanical encapsulation.
The main radiator of antenna comprises the broken line of different live widths, and the first wherein the thinnest broken line 26 is adjacent with the second long limit of inductive loop, and the length of first broken line 26 is greater than the length on the inductive loop second long limit; The live width of first broken line 26 is narrow to be in order to increase the coupling between inductive loop 20 and the antenna main radiator.First broken line 26 is parallel with the second long limit of inductive loop.The second long limit of main radiator and inductive loop is by the form interactive information and the transmission energy of inductance coupling high.
The main radiator of antenna bends to the short side direction of inductive loop 20 respectively from the two ends of first broken line 26, forms two section second broken line 271,272, can reduce the main radiator length of a curve like this.The length of second broken line 271,272 is greater than the length of inductive loop minor face;
The main radiator of antenna forms the width of the width of two sections tri linear 281,282, the tri linears 281,282 greater than second broken line 271,272 from the upper end bending to the left and right respectively of two section second broken line 271,272;
The main radiator of antenna 291,292 is turned back to center of antenna from two ends, forms two section the 4th broken line 211,212, the further like this length that reduces main radiator.The width of the 4th broken line 211,212 is greater than the width of tri linear 281,282.The 4th broken line 211,212 is parallel with tri linear 281,282 respectively.
The induction reactance numerical value of inductive loop approximates the absolute value of the reactance imaginary part of electronic label chip.
Literal is arranged at the top on the first long limit of inductive loop, comprises the literal 24 of hollow out on the antenna metal or the literal main body 25 of using the antenna metal directly to constitute, and these literal can be the models of antenna.Literal among Fig. 2 is the literal of mirror image, and metal was near object when antenna was pasted, and the substrate of antenna sees into that from substrate literal just just come outside.
Two ends the 291, the 292nd of antenna, pattern or literal are formed or are used the antenna metal directly to constitute by hollow out on the antenna metal.This pattern or literal can be logos.
The induction reactance of inductive loop 20 is designed to equate with the capacitive reactance absolute value of chip, thereby satisfies the requirement that the imaginary part of antenna reactance and chip reactance is gripped altogether.
The radiation efficiency of this new antenna is greater than 95%.See also the return loss plot figure between Fig. 3 the utility model electronic label antenna and the chip, abscissa is a frequency among the figure, and unit is GHz, and ordinate is the return loss of label.As seen the frequency bandwidth of antenna is non-constant width, can satisfy the application demand of all frequency ranges of ultrahigh frequency electronic tag fully.
The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be technology category of the present utility model.
Claims (7)
1. an electronic label antenna comprises inductive loop (20) and main radiator, it is characterized in that:
The length of antenna is less than the half-wavelength of its work,
Described inductive loop (20) is rectangle, and is separated in the first long limit of inductive loop, forms two ports (221,222) of antenna, and these two ports are connected with the chip of electronic tag;
The main radiator of antenna comprises the broken line of different live widths, and wherein the thinnest first broken line (26) is adjacent with the second long limit of inductive loop, and the length of first broken line (26) is greater than the length on the inductive loop second long limit;
The main radiator of antenna bends to the short side direction of inductive loop (20) respectively from the two ends of first broken line (26), forms two section second broken line (271,272), and the length of second broken line (271,272) is greater than the length of inductive loop minor face;
The main radiator of antenna forms two sections tri linears (281,282) from the upper end bending to the left and right respectively of two section second broken line (271,272); The main radiator of antenna is turned back to center of antenna from two ends (291,292), forms two section the 4th broken line (211,212).
2. electronic label antenna according to claim 1 is characterized in that form interactive information and the transmission energy of the second long limit of described main radiator and inductive loop by inductance coupling high.
3. electronic label antenna according to claim 1 is characterized in that the induction reactance numerical value of described inductive loop equals the absolute value of the reactance imaginary part of electronic label chip.
4. electronic label antenna according to claim 1 is characterized in that described first broken line (26) is parallel with the second long limit of inductive loop.
5. electronic label antenna according to claim 1 is characterized in that described the 4th broken line (211,212) is parallel with tri linear (281,282) respectively.
6. electronic label antenna according to claim 1 is characterized in that the width of the width of described tri linear (281,282) greater than second broken line (271,272).
7. electronic label antenna according to claim 1 is characterized in that the width of the width of described the 4th broken line (211,212) greater than tri linear (281,282).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200672766U CN201466215U (en) | 2009-01-22 | 2009-01-22 | Electronic tag antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200672766U CN201466215U (en) | 2009-01-22 | 2009-01-22 | Electronic tag antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466215U true CN201466215U (en) | 2010-05-12 |
Family
ID=42393562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200672766U Expired - Lifetime CN201466215U (en) | 2009-01-22 | 2009-01-22 | Electronic tag antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466215U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112625A (en) * | 2014-10-30 | 2017-08-29 | 凸版资讯股份有限公司 | Noncontact data transmitter and receiver body |
-
2009
- 2009-01-22 CN CN2009200672766U patent/CN201466215U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112625A (en) * | 2014-10-30 | 2017-08-29 | 凸版资讯股份有限公司 | Noncontact data transmitter and receiver body |
| US10303994B2 (en) | 2014-10-30 | 2019-05-28 | Toppan Forms Co., Ltd. | Non-contract data receiving/transmitting body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
|
| CX01 | Expiry of patent term |