CN201490324U - Active tag antenna and active tag - Google Patents
Active tag antenna and active tag Download PDFInfo
- Publication number
- CN201490324U CN201490324U CN2009201730260U CN200920173026U CN201490324U CN 201490324 U CN201490324 U CN 201490324U CN 2009201730260 U CN2009201730260 U CN 2009201730260U CN 200920173026 U CN200920173026 U CN 200920173026U CN 201490324 U CN201490324 U CN 201490324U
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- radiating element
- active label
- distributing point
- antenna
- label antenna
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Abstract
The utility model discloses an active tag antenna and an active tag, wherein the active tag antenna comprises a radiation unit, a grounding surface and a dielectric slab; the radiation unit comprises a substrate and a plurality of radiation units arranged on the substrate and made of metal, wherein each radiation unit is respectively provided with a feeding point; the central symmetrical position of all feeding pointes is provided with a master feeding point; and each feeding point is respectively connected to the master feeding point by metal wires. The active tag antenna with the structure can effectively improve the gains, reduce beam width, and improve the anti-interference performance and sensitivity of the antenna.
Description
Technical field
The utility model relates to the radio frequency identification field, relates in particular to a kind of active label antenna and active label.
Background technology
Radio frequency identification (Radio Frequency Identification abbreviates RFID as) is a kind of contactless automatic identification radio-frequency technique, and it is by the automatic recognition objective object of radiofrequency signal and obtain related data.Because RFID identification work need not manual intervention, can work in various adverse circumstances, based on this specific character, this automated wireless identification of RFID and data acquisition technology are used widely in various fields, closely merge with modern logistics, traffic, monitoring and Internet technology.
Below rfid system and operation principle thereof are carried out simple declaration: rfid system mainly comprises reader, reader antenna and label.In the rfid system course of work, the radio-frequency module that reader can be controlled in the rfid system transmits to label by reader antenna, label is handled accordingly to the signal that it receives, obtain result, again result is sent to reader, reader receives replying of label by reader antenna, and the object id information of label is decoded, other related information transmission on the related label of object id information to main frame, is formed a complete communication link.Wherein, label is made up of label Inlay and outer package, and label Inlay comprises label chip and label antenna, and different label chips is observed different communication protocol (for example, the chip of ISO18000-6C agreement).
At present, people have been applied to the RFID technology in electric non-stop toll (Electronic TollCollection the abbreviates ETC as) technology (for example, on highway charge and come in and go out vehicle registration).Concrete application is as follows: set up (Remote Sensor Units at the freeway toll station place, abbreviate RSU as) reader (corresponding to the reader in the rfid system), and on each car, place active board units (corresponding to the label in the rfid system), can insert storage userspersonal information's card (preserving the cost information of vehicle in this card) on the board units.Like this, do board units and card as a whole, when vehicle passed through charge station, RSU reader in the charge station and board units were as a rfid system, by according to certain rule of communication vehicle being deducted fees between reader and the active board units or registering.When the RFID technology was applied to electric non-stop toll, the working frequency range of rfid system can be arranged on 5.79GHz-5.84GHz.By means of the electric non-stop toll technology, pay dues at charging aperture with regard to not needing vehicle to stop, improved the efficient of charge station, for the user has brought convenience.
At present, the antenna of board units is generally microstrip antenna, and mainly adopts the form of single antenna, and wherein, the microstrip antenna form of circular polarized antenna is a corner cut, and this corner cut can cause the bigger space of hold facility, can't adapt to the demand of present device miniaturization; And single microstrip antenna gain is on the low side, and beamwidth is very wide, easily causes the sensitivity deficiency of equipment in application, and the equipment that can produce between adjacent lane disturbs.
The utility model content
Antenna gain at board units in the correlation technique is lower, sensitivity is poor and occur the problem that equipment room disturbs easily, the utility model proposes a kind of active label antenna, the gain that can improve label, and the interference free performance and the sensitivity that improve antenna.
Antenna gain at board units in the correlation technique is lower, sensitivity is poor and occur the problem that equipment room disturbs easily, the utility model proposes a kind of active label, can improve the gain of label, and improves the interference free performance and the sensitivity of antenna.
The technical solution of the utility model is achieved in that
A kind of active label antenna comprises:
Radiating element, ground plane and dielectric-slab, wherein, dielectric-slab is arranged between radiating element and the ground plane and with radiating element and ground plane and contacts, wherein, radiating element comprises a plurality of radiating elements that are made of metal that are provided with on substrate and the substrate, wherein, is provided with distributing point on each radiating element, the symmetry place is provided with total distributing point at the center of all distributing points, and each distributing point all is connected to total distributing point by metal wire.
Preferably, the shape of each radiating element and size are mutually the same.
Preferably, the relative position of each distributing point on its radiating element separately is mutually the same.
Wherein, radiating element is shaped as rectangle.
Wherein, the quantity of radiating element is two.
Wherein, the active label antenna also comprises the parasitic element that is made of metal, and wherein, parasitic element is the shape sheet metal identical with radiating element, and parasitic element is arranged on radiating element one side, parallels with radiating element and keeps at a certain distance away.
Wherein, the scope of the vertical range between parasitic element and the radiating element is: 0.015 λ to 0.1 λ, wherein, λ is electromagnetic wavelength.
Wherein, the metal wire between each distributing point and the total distributing point is identical, and wherein, metal wire is identical to be meant: the specification of metal wire, length and shape are mutually the same.
Preferably, the length of side of radiating element is approximately equal to λ/2, and wherein, λ is electromagnetic wavelength.
A kind of active label comprises the circuit and the active label antenna that are connected by the radio frequency microstrip line, and the active label antenna comprises radiating element, ground plane and dielectric-slab, wherein,
Dielectric-slab is arranged between radiating element and the ground plane and with radiating element and ground plane and contacts, it is characterized in that, radiating element comprises a plurality of radiating elements that are made of metal that are provided with on substrate and the substrate, wherein, be provided with distributing point on each radiating element, the symmetry place is provided with total distributing point at the center of all distributing points, and each distributing point all is connected to total distributing point by metal wire.
Preferably, the shape of each radiating element and size are mutually the same.
Wherein, the active label antenna also comprises the parasitic element that is made of metal, and wherein, parasitic element is the shape sheet metal identical with radiating element, and parasitic element is arranged on radiating element one side, parallels with radiating element and keeps at a certain distance away.
The utility model passes through to adopt the antenna structure of many rectangles, and has added parasitic element, has reduced the usage space size, and can improve gain effectively, reduces beamwidth, improves the interference free performance and the sensitivity of antenna.
Description of drawings
Fig. 1 is the structural representation according to radiating element in the active label antenna of the present utility model;
Fig. 2 is the schematic diagram that will be arranged at according to active label antenna of the present utility model in the housing;
Fig. 3 is the end view that will be arranged at according to active label antenna of the present utility model in the housing.
Embodiment
Therefore the utility model according to the design feature of existing board units, has added parasitic element, and has adopted the antenna structure of many rectangles at present present situation on the shell of board units, below structure of the present utility model is described.
Active label antenna in the utility model comprises radiating element, ground plane and dielectric-slab, dielectric-slab is arranged between radiating element and the ground plane and with radiating element and ground plane and contacts, radiating element wherein comprises a plurality of radiating elements that are made of metal that are provided with on substrate and the substrate, wherein, be provided with distributing point on each radiating element, the symmetry place is provided with total distributing point at the center of all distributing points, each distributing point all is connected to total distributing point preferably by metal wire, the shape of each radiating element and size are mutually the same, preferably, the shape of this radiating element can be rectangle.And in order to reach better feed effect, the relative position of each distributing point on its radiating element separately is mutually the same.And the metal wire between each distributing point and the total distributing point is identical, and wherein, metal wire is identical to be meant: the specification of metal wire, length and shape are mutually the same.
In order further to improve the gain of antenna, the active label antenna also comprises the parasitic element that is made of metal, and wherein, parasitic element is the shape sheet metal identical with radiating element, and parasitic element is arranged on radiating element one side, parallels with radiating element and keeps at a certain distance away.
Preferably, the scope of the vertical range between parasitic element and the radiating element can be 0.015 λ to 0.1 λ, and the length of side of radiating element can be approximately equal to λ/2, and wherein, λ is electromagnetic wavelength.
In order better the utility model to be described, being two with the quantity of rectangular radiation unit below is that example describes the utility model, those skilled in the art are plural situation for the quantity of radiating element as can be known, and the utility model can be realized equally.
Active label antenna in the utility model comprises radiating element, ground plane and dielectric-slab, wherein, dielectric-slab is arranged between radiating element and the ground plane and with radiating element and ground plane and contacts, the agent structure of the active label antenna in the utility model and the agent structure of existing label antenna are similar, here be not described in detail, Fig. 1 is the structured flowchart of radiating element in the active label antenna of the present utility model, as shown in Figure 1, radiating element comprises that substrate C and substrate C go up being made of metal of being provided with, and shape and the mutually the same first rectangular radiation unit A and the second rectangular radiation unit B of size, wherein, the first rectangular radiation unit A is provided with first distributing point 1, the first rectangular radiation unit B is provided with second distributing point 1 ', vertical centre place between first distributing point 1 and second distributing point 1 ' is provided with total distributing point, first distributing point 1 all is connected to total distributing point that links to each other by metal wire with second distributing point 1 ', and the metal wire between the metal wire between first distributing point 1 and the total distributing point and second distributing point 1 ' and the total distributing point is identical, i.e. the specification of two metal wires, length, mutually the same with shape.Like this, just formed the structure of double-matrix, compared with the structure of the single microstrip antenna of available technology adopting, the label antenna of having chance with in the utility model can improve gain effectively, and reduce beamwidth.And, adopt the shared space of the equipment of rectangular configuration less, adapted to the demand of present device miniaturization.The working frequency range of label antenna is high more owing to have chance with, and the operation wavelength of the label antenna of having chance with is low more, and the resonance frequency of the label antenna of having chance with is more little, and the size of the label antenna of having chance with is more little.That is, working frequency range difference, the specification difference of rectangular radiation unit A or B.This rectangular radiation unit A and rectangular radiation unit B can be made by the metal of conduction, for example copper or silver.
In addition, in order further to improve the gain of active label antenna, this active label antenna can also comprise the parasitic element that is made of metal, wherein, parasitic element is shape and the first rectangular radiation unit A and the identical sheet metal of the second rectangular radiation unit B, and parasitic element is arranged on a side of the first rectangular radiation unit A and the second rectangular radiation unit B projection, parallels with radiating element and keeps at a certain distance away.Wherein, the scope of the vertical range between parasitic element and the radiating element is: 0.015 λ to 0.1 λ, wherein, λ is electromagnetic wavelength.
The utility model passes through to adopt the antenna structure of double square, and has added parasitic element, has reduced the usage space size, and can improve gain effectively, reduces beamwidth, improves the interference free performance and the sensitivity of antenna.
Operation principle to this active label antenna describes below, in actual applications, because the price comparison of copper is cheap, in order to save cost, preferentially can select for use copper as conducting metal, therefore rectangular radiation unit A and rectangular radiation unit B can be made of copper, and like this, antenna body mainly comprises three parts: the shop copper radiation face of upper surface, the copper ground, shop of lower surface, be positioned at the dielectric-slab in the middle of upper surface and the lower surface.
The radiating surface thickness of upper surface is 0.035ms, by this metal covering is handled, and can be so that this metal covering becomes the rectangular preiection portion (that is, above-mentioned the first rectangular radiation unit A and the second rectangular radiation unit B) of two same sizes.Particularly, can adopt processing technologys such as etch process, depositing operation, printed antenna technology on radiating surface, to generate two metal rectangular projections, with the etch process is example: utilize screen printer that anticorrosion printing ink is printed to according to the shape of rectangle and cover on Copper Foil or the cladded aluminum foil, with etching machines the metal of remainder is dissolved away, remaining metal pattern is exactly a rectangle again.Like this, the shop copper radiation face of upper surface is a radiating surface of having carved the identical rectangle of two sizes, promptly forms two rectangular radiation unit, and the length of side of the first rectangular radiation unit (A) and the second rectangular radiation unit (B) can be approximately equal to λ/2, wherein, λ is electromagnetic wavelength.Like this, the active label antenna of this Unit two battle array, each radiating element all are the structures of rectangle, and two long limits and minor face by rectangle carry out the edge gap radiation, and the gain of this kind form is very high, and bandwidth is also very wide, can effectively improve the performance of antenna.
In the utility model, each radiating element all is a rectangular configuration, for any rectangular radiation unit, in the feed process, by it being carried out feed at a drift angle place of rectangle (first distributing point 1 and second distributing point 1 ' shown in Fig. 1), rectangle divides long limit and minor face, owing to be to carry out feed at the drift angle place, this drift angle is the common point of long limit and minor face, make the long limit and the minor face that link to each other with this drift angle can both carry out radiation, and the angle that the long limit of rectangle and minor face form is 90 degree, and the difference that then long limit and minor face carry out the excitation phase after the radiation is 90 degree, afterwards, can make that the excitation amplitude (being excitation energy mentioned above) on these two limits is equal substantially, like this by regulating the long edge lengths and the bond length of rectangle, two long limits and minor face by rectangle carry out the radiation at edge, because grow the different realization phase differences of limit and minor face, so just satisfied the condition of circular polarization, realized circular polarization.The gain of this kind circular polarity format is very high, and bandwidth is also very wide, battle array is organized in two unit handle, and effectively raises gain, and has reduced the beamwidth of horizontal direction.
And, two rectangular radiation unit in the utility model link to each other by feeding network, and these two rectangular elements are realized the feed of constant amplitude homophases, because the shape size of these two rectangles is in full accord, and these two rectangular radiation unit are also consistent with the transmission path between middle distributing point, so from feeding network, these two rectangular radiation unit are duplicate, be the spacing of a nearly wavelength between two rectangular radiation unit.By said structure as can be seen, feeding network carries out feed to the same summit of two rectangular radiation unit, promptly the relative position of first distributing point 1 on the affiliated first rectangular radiation unit A can be identical with the relative position of second distributing point 1 ' on the second rectangular radiation unit B, and total distributing point is in the centre position of two radiating elements, promptly two rectangular radiation unit are symmetrical with respect to total distributing point, like this, the phases such as the same width of cloth of feeding network have just been guaranteed, and the path of transmission is the shortest, thereby guaranteed the maximum transmitted of energy, improved gain.
The copper paving area of lower surface is a complete copper ground, shop, like this, has just formed the structure of microstrip antenna between upper surface in the antenna body and the lower surface.
In the application scenario of active label, clear and definite requirement may be arranged the wave beam of antenna, therefore considering is increasing antenna parasitic element, this antenna parasitic element is positioned on the inner casing of plastic casing, parasitic element is the sheet metal of copper (or other metals are made), and the shape of this sheet metal is identical with the shape of A of rectangular preiection portion and B, and size can be different, the size of this sheet metal length of side also can be near half-wavelength, and parallel placement with antenna body.The spacing height of parasitic element and primary radiation unit is different to the effect that improves that gains not simultaneously, and the size of parasitic element is also in conjunction with highly regulating.If this active label antenna is a circular polarized antenna, the disposing way of parasitic element can be consistent with the putting position of radiating element, can further improve the effect of parasitic element like this.Can improve gain by adding parasitic element, and horizontal beam width can be reduced.The advantage of the antenna of this structure is that the structure gain of rectangular array is higher, and impedance bandwidth is very wide.And, also horizontal beam width is further reduced by the form of the adding parasitic element further raising that will gain.
Fig. 2 is the schematic diagram that will be arranged at according to active label antenna of the present utility model in the housing, and Fig. 3 is the end view that will be arranged at according to active label antenna of the present utility model in the housing.As shown in Figures 2 and 3, it is identical with the second rectangular radiation unit B size to have first a rectangular radiation unit A, is arranged side by side in housing.Preferably, inner surface at housing can also post parasitic element sheet metal (not shown) made of copper, wherein, parasitic element can be arranged in the frame that shell inner surface leaves, this parasitic element can be copper sheet, aluminium flake, silver strip etc., and be fixed in the frame by bonding way, thereby further improve gain, effectively reduce horizontal beam width.
In actual applications, the substrate of active label antenna can adopt common FR4 sheet material, and antenna substrate thickness is preferably 1.2mm, and dielectric constant is 4.4.Because antenna is a microstrip antenna structure, feed end directly links to each other by adding microwave capacitors with the output of radio frequency, and this connected mode is simple and reliable, stable performance.In the specific implementation process, can be with multiple poliarizing antennas such as circular polarized antenna or linear polarized antennas as the active label antenna.
The utility model also provides a kind of active label, and this comprises circuit and active label antenna, and wherein, circuit is connected by the radio frequency microstrip line with the active label antenna.The structure and the operation principle of active label antenna in this active label and active label antenna mentioned above are identical, give unnecessary details no longer in detail here.
The utility model provides a kind of stable performance, the active label antenna higher, that the particular beam width is arranged that gains, and can be applicable in the vehicle-mounted active label.Antenna of the present utility model has adopted the structure of squaerial, carries out feed on a summit of rectangle, makes four limits of rectangle can both carry out radiation, thereby has improved radiation efficiency, has improved antenna gain; Carry out feed on a limit in the microstrip antenna of common employing rectangular in form and cause having the effectively problem of radiation of two limits, rectangular configuration antenna in the utility model has adopted non-basic incentive mode, obviously gain improves, increase the impedance bandwidth of antenna, effectively improve the overall performance of antenna.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. active label antenna, comprise radiating element, ground plane and dielectric-slab, wherein, described dielectric-slab is arranged between described radiating element and the described ground plane and with described radiating element and described ground plane and contacts, it is characterized in that, described radiating element comprises a plurality of radiating elements that are made of metal that are provided with on substrate and the described substrate, wherein, be provided with distributing point on each radiating element, the symmetry place is provided with total distributing point at the center of all distributing points, and each distributing point all is connected to described total distributing point by metal wire.
2. active label antenna according to claim 1 is characterized in that, the shape of each radiating element and size are mutually the same.
3. active label antenna according to claim 2 is characterized in that, the relative position of described each distributing point on its radiating element separately is mutually the same.
4. active label antenna according to claim 3, it is characterized in that, described active label antenna also comprises the parasitic element that is made of metal, wherein, described parasitic element is the shape sheet metal identical with described radiating element, and described parasitic element is arranged on described radiating element one side, parallels with described radiating element and keeps at a certain distance away.
5. active label antenna according to claim 4 is characterized in that, the scope of the vertical range between described parasitic element and the described radiating element is: 0.015 λ to 0.1 λ, wherein, λ is electromagnetic wavelength.
6. according to each described active label antenna in the claim 1 to 5, it is characterized in that the quantity of described radiating element is two.
7. according to each described active label antenna in the claim 1 to 5, it is characterized in that, metal wire between each distributing point and the described total distributing point is identical, and wherein, described metal wire is identical to be meant: the specification of metal wire, length and shape are mutually the same.
8. according to each described active label antenna in the claim 1 to 5, it is characterized in that, described radiating element be shaped as rectangle.
9. active label antenna according to claim 8 is characterized in that the length of side of described radiating element is approximately equal to λ/2, and wherein, λ is electromagnetic wavelength.
10. active label, comprise the circuit and the active label antenna that are connected by the radio frequency microstrip line, described active label antenna comprises radiating element, ground plane and dielectric-slab, wherein, described dielectric-slab is arranged between described radiating element and the described ground plane and with described radiating element and described ground plane and contacts, it is characterized in that, described radiating element comprises a plurality of radiating elements that are made of metal that are provided with on substrate and the described substrate, wherein, be provided with distributing point on each radiating element, the symmetry place is provided with total distributing point at the center of all distributing points, and each distributing point all is connected to described total distributing point by metal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730260U CN201490324U (en) | 2009-08-31 | 2009-08-31 | Active tag antenna and active tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730260U CN201490324U (en) | 2009-08-31 | 2009-08-31 | Active tag antenna and active tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490324U true CN201490324U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201730260U Expired - Lifetime CN201490324U (en) | 2009-08-31 | 2009-08-31 | Active tag antenna and active tag |
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| CN (1) | CN201490324U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261603A (en) * | 2021-10-28 | 2022-04-01 | 浙江菜鸟供应链管理有限公司 | Radio frequency packaging box and processing method thereof |
| CN114261604A (en) * | 2021-10-28 | 2022-04-01 | 浙江菜鸟供应链管理有限公司 | Radio frequency packing box |
-
2009
- 2009-08-31 CN CN2009201730260U patent/CN201490324U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261603A (en) * | 2021-10-28 | 2022-04-01 | 浙江菜鸟供应链管理有限公司 | Radio frequency packaging box and processing method thereof |
| CN114261604A (en) * | 2021-10-28 | 2022-04-01 | 浙江菜鸟供应链管理有限公司 | Radio frequency packing box |
| CN114261604B (en) * | 2021-10-28 | 2023-08-22 | 浙江菜鸟供应链管理有限公司 | Radio frequency packing box |
| CN114261603B (en) * | 2021-10-28 | 2023-08-25 | 浙江菜鸟供应链管理有限公司 | Radio frequency packing box and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160907 Address after: 300308 Tianjin Airport Economic Zone, Binhai New Area seven East Road No. 2 Zhongxing Industrial Base Patentee after: ZTE INTELLIGENT IOT TECHNOLOGY CO., LTD. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |