CN204216213U - A kind of chi structure antenna for radio-frequency (RF) identification - Google Patents
A kind of chi structure antenna for radio-frequency (RF) identification Download PDFInfo
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- CN204216213U CN204216213U CN201420689662.XU CN201420689662U CN204216213U CN 204216213 U CN204216213 U CN 204216213U CN 201420689662 U CN201420689662 U CN 201420689662U CN 204216213 U CN204216213 U CN 204216213U
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- identification
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Abstract
The utility model discloses a kind of chi structure antenna for radio-frequency (RF) identification, comprise many squaerial, the normal of the rectangle plane of described many squaerial is parallel to each other, the projection section of rectangle plane in described normal direction of described many squaerial is overlapping, described multiple squaerial is projected in the useful signal receiving area near squaerial interior location in described normal direction and is connected to each other.Owing to making the projection section of the rectangle plane of many squaerial in described normal direction overlapping, described multiple squaerial is projected in the useful signal receiving area near squaerial interior location in described normal direction be connected to each other, ensure that the useful signal receiving area that many squaerial are formed is inner without blind spot; In addition, because antenna is made up of many squaerial, combined and instant is installed, size and the installation site of the squaerial of each composition can be changed flexibly.
Description
Technical field
The utility model belongs to field of antenna, more specifically, relates to a kind of chi structure antenna for radio-frequency (RF) identification.
Background technology
Radio-frequency (RF) identification (Radio Frequency Identification, RFID) technology, also known as radio frequency identification, it is a kind of communication technology, read and write related data by radio signals identification specific objective, and without the need to setting up machinery or optical contact between recognition system and specific objective.The dimensional requirement of RFID technique to antenna is stricter, distortion dipole antenna (as annular dual slope dipole, tri linear folded dipole etc.) is simple with its structure, polarization mode arbitrarily can be converted by group battle array, advantage that impedance easily changes and resonance point is good tuning etc., is regarded as the first-selection of tag antenna design in RFID technique.
Although it is simple that distortion dipole antenna has structure, polarization mode arbitrarily can be converted by group battle array, advantage that impedance easily changes and resonance point is good tuning etc., but by the restriction of antenna structure itself, blind spot is often there is (such as in receiving area, just blind spot is there is in many broken lines folded dipole central area), antenna cannot be received in the signal of these blind spot region, have impact on range of application and the application prospect of RFID technique.
For avoiding the mode of antenna blind spot defect mainly to comprise in prior art, use annular dual slope dipole, and increase the area of annular dual slope dipole antenna, make the Signal reception region of the Received signal strength region overlay target of antenna.But, further research shows, although the area increasing loop aerial can solve the Signal reception problem in target area, but still there is following technical problem in above-mentioned existing solution: the volume of RFID technique to antenna has strict requirement, the antenna that volume, area are less is that RFID technique development is necessary, and the loop aerial that area is large is not easy to actual installation and application; The impedance of the loop aerial that this outer area is large does not meet the requirement of RFID technique to impedance yet: the area of antenna is large, when radio-frequency emission power is constant, detecting distance can obviously reduce, Detection results can obviously be deteriorated, often can there is the situation of the card that can't detect, namely detect instability; Detection will be made to stablize when large area antenna, need to strengthen transmitting power, power consumption is high, and effect is not also very desirable.And the multiple miniature antenna patterns adopted often exist the problem of check frequency, effectively can not detect whole region, particularly at the borderline region of antenna, Detection results is very undesirable.
Utility model content
For above defect or the Improvement requirement of prior art, the purpose of this utility model is to provide a kind of chi structure antenna for radio-frequency (RF) identification, wherein by improving the structure of its key component and set-up mode thereof etc., compared with prior art effectively can solve the problem that antenna exists blind spot in echo signal receiving area, affects Signal reception effect, and adopt the mode that combination is installed, convenient and flexible installation, be convenient to need flexible antenna size according to actual RFID, obtain the technique effect that antenna cover area is large, easy for installation.
For achieving the above object, according to an aspect of the present utility model, provide a kind of chi structure antenna for radio-frequency (RF) identification, it is characterized in that, comprise many squaerial, the rectangle plane of described many squaerial is positioned at same plane, and the normal of each rectangle plane is parallel to each other, the projection section of rectangle plane in described normal direction of described many squaerial overlaps to form chi structure, described multiple squaerial is connected to each other in the projection of useful signal receiving area in described normal direction near squaerial interior location.
As of the present utility model preferred further, the width of described many squaerial is 5cm, and the centre normal spacing of described many squaerial is 3cm.
As of the present utility model preferred further, the width of described many squaerial is 8cm, and the centre normal spacing of described many squaerial is 6cm.
By the above technical scheme that the utility model is conceived, compared with prior art, owing to making the projection section of the rectangle plane of many squaerial in described normal direction overlapping, described multiple squaerial is projected in the useful signal receiving area near squaerial interior location in described normal direction be connected to each other, ensure that the useful signal receiving area that many squaerial are formed is inner without blind spot; In addition, because antenna is made up of many squaerial, combined and instant is installed, size and the installation site of the squaerial of each composition can be changed flexibly, be specially adapted to various application scenario antenna pattern and volume being had to particular/special requirement, as RFID etc., the beneficial effect that antenna is easy to install and use, Signal reception is effective can be obtained.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the chi structure antenna for radio-frequency (RF) identification;
Fig. 2 is the vertical view of the chi structure antenna for radio-frequency (RF) identification.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment 1
Squaerial is 3, the normal of the rectangle plane of every root squaerial is parallel to each other, the rectangle plane projection section in the direction of its normal of these 3 squaerial is overlapping, the useful signal receiving area of each squaerial is projected in the normal direction and is connected to each other.The width of every root squaerial is 5cm, and the centre normal of squaerial is to each other apart from being 3cm.Each squaerial close contact, makes the rectangle plane of squaerial substantially be in same plane.
Be connected to each other because the useful signal receiving area of these 3 squaerial near close squaerial interior location projects in the direction of its normal, ensure that the useful signal receiving area be made up of these 3 squaerial is inner without blind spot, ensure that the stable reception of signal.
Embodiment 2
Squaerial is 2, the normal of the rectangle plane of every root squaerial is parallel to each other, the rectangle plane projection section in the direction of its normal of these 2 squaerial is overlapping, the useful signal receiving area of each squaerial is projected in the normal direction and is connected to each other.The width of every root squaerial is 8cm, and the centre normal of squaerial is to each other apart from being 6cm.Each squaerial close contact, makes the rectangle plane of squaerial substantially be in same plane.
Be connected to each other because the useful signal receiving area of these 2 squaerial near close squaerial interior location projects in the direction of its normal, ensure that the useful signal receiving area be made up of these 2 squaerial is inner without blind spot, ensure that the stable reception of signal.
According to practical application request (as Signal reception area size, antenna mounting locations and size etc.), and in conjunction with the size of the actual useful signal receiving area of each antenna and shape, those skilled in the art can adjust the installation site etc. of the number of squaerial, the width of squaerial, the spacing of the centre normal of squaerial and the rectangle plane of squaerial.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. the chi structure antenna for radio-frequency (RF) identification, it is characterized in that, comprise many squaerial, the rectangle plane of described many squaerial is positioned at same plane, and the normal of each rectangle plane is parallel to each other, the projection section of rectangle plane in described normal direction of described many squaerial overlaps to form chi structure, and described multiple squaerial is connected to each other in the projection of useful signal receiving area in described normal direction near squaerial interior location.
2., as claimed in claim 1 for the chi structure antenna of radio-frequency (RF) identification, it is characterized in that, the width of described many squaerial is 5cm, and the centre normal spacing of described many squaerial is 3cm.
3., as claimed in claim 1 for the chi structure antenna of radio-frequency (RF) identification, it is characterized in that, the width of described many squaerial is 8cm, and the centre normal spacing of described many squaerial is 6cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689662.XU CN204216213U (en) | 2014-11-18 | 2014-11-18 | A kind of chi structure antenna for radio-frequency (RF) identification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689662.XU CN204216213U (en) | 2014-11-18 | 2014-11-18 | A kind of chi structure antenna for radio-frequency (RF) identification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204216213U true CN204216213U (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420689662.XU Expired - Fee Related CN204216213U (en) | 2014-11-18 | 2014-11-18 | A kind of chi structure antenna for radio-frequency (RF) identification |
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| CN (1) | CN204216213U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107657734A (en) * | 2017-10-30 | 2018-02-02 | 赵昕昱 | A kind of sales counter and its application method with commodity RFID identification plate |
| CN107680265A (en) * | 2017-10-30 | 2018-02-09 | 北京正众信源传媒科技有限公司 | A kind of sales counter and its application method |
| CN107767558A (en) * | 2017-10-30 | 2018-03-06 | 北京正众信源传媒科技有限公司 | A kind of return of goods cabinet and its application method |
| CN107808468A (en) * | 2017-10-30 | 2018-03-16 | 北京正众信源传媒科技有限公司 | Commodity RFID identification plate and its application method |
| CN107826470A (en) * | 2017-10-30 | 2018-03-23 | 北京正众信源传媒科技有限公司 | A kind of commodity plastic coating and its application method |
-
2014
- 2014-11-18 CN CN201420689662.XU patent/CN204216213U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107657734A (en) * | 2017-10-30 | 2018-02-02 | 赵昕昱 | A kind of sales counter and its application method with commodity RFID identification plate |
| CN107680265A (en) * | 2017-10-30 | 2018-02-09 | 北京正众信源传媒科技有限公司 | A kind of sales counter and its application method |
| CN107767558A (en) * | 2017-10-30 | 2018-03-06 | 北京正众信源传媒科技有限公司 | A kind of return of goods cabinet and its application method |
| CN107808468A (en) * | 2017-10-30 | 2018-03-16 | 北京正众信源传媒科技有限公司 | Commodity RFID identification plate and its application method |
| CN107826470A (en) * | 2017-10-30 | 2018-03-23 | 北京正众信源传媒科技有限公司 | A kind of commodity plastic coating and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20181118 |