CN209200148U - Phased array antenna and RFID system applied to RFID system - Google Patents
Phased array antenna and RFID system applied to RFID system Download PDFInfo
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- CN209200148U CN209200148U CN201821778772.8U CN201821778772U CN209200148U CN 209200148 U CN209200148 U CN 209200148U CN 201821778772 U CN201821778772 U CN 201821778772U CN 209200148 U CN209200148 U CN 209200148U
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Abstract
The application provides a kind of phased array antenna and RFID system applied to RFID system, wherein the phased array antenna includes: the transmitting-receiving integrated array antenna being made of antenna submatrix；And the phase component with array antenna electrical connection；And the communication control module of phase shifting control function is electrically connected and had with the phase component；The phase shifting control function is the function of being controlled by phase of the phase component to each antenna in the array antenna.Scheme provided by the present application can realize that the dynamic of wave beam is adjustable.
Description
Technical field
This application involves electronic technology field more particularly to a kind of phased array antenna and RFID system applied to RFID system
System.
Background technique
Radio frequency identification (Radio Frequency Identification, RFID) technology, also known as radio frequency identification be
It is a kind of to identify specific objective by radio signals and read and write the communication technology of related data.
Currently, realizing the adjustable scheme of RFID communications zone, rotated using machinery, i.e., by manually adjusting antenna
Direction of illumination, to realize the movement of antenna beam.
However, the mode of mechanical rotation needs artificially rotary antenna direction, with increasing for number of revolutions, machine will cause
Tool abrasion.
Summary of the invention
The application provides a kind of phased array antenna applied to RFID system, it can be achieved that the dynamic of wave beam is adjustable.
Wherein, the application first aspect provides a kind of phased array antenna applied to RFID system, comprising:
The transmitting-receiving integrated array antenna being made of antenna submatrix；
And the phase component with array antenna electrical connection；
And the communication control module of phase shifting control function is electrically connected and had with the phase component；
The phase shifting control function is to be controlled by phase of the phase component to each antenna in the array antenna
The function of system.
Based on the application in a first aspect, in the first possible implementation, the antenna in each antenna submatrix
It is made of the metal patch etched from thin-medium substrate；
And each antenna in same antenna submatrix passes through microstrip line and axis probe feed.
The first possible implementation based on the application first aspect, in the second possible implementation, institute
It states metal patch surface and offers U-type groove.
The first possible implementation based on the application first aspect, in the third possible implementation, institute
Stating metal patch is specially rectangular metal patch.
The first possible implementation based on the application first aspect, in the fourth possible implementation, institute
State the antenna submatrix that antenna submatrix is specially 1*4.
The first possible implementation based on the application first aspect, in a fifth possible implementation, institute
State the antenna submatrix that antenna submatrix is specially 1*6.
Based on the application in a first aspect, or the application first aspect the first possible implementation or the application
The third possible implementation or the application of the possible implementation of second of one side or the application first aspect
4th kind of possible implementation of first aspect or the 5th kind of possible implementation of the application first aspect, the 6th
In the possible implementation of kind, the array antenna includes more than two antenna submatrixs；
The phase component includes: the phase shifter being electrically connected respectively with each antenna submatrix；
Wherein, different antennae submatrix connects different phase shifters.
The 6th kind of possible implementation based on the application first aspect, in the 7th kind of possible implementation, institute
Communication control module is stated to be constructed by the processor of the above D/A converting circuit of built-in two-way；
Wherein, every number analog conversion circuit of the processor is connect with a phase shifter.
The 6th kind of possible implementation based on the application first aspect, in the 8th kind of possible implementation, institute
The spacing stated between each antenna submatrix in array antenna is equal；
The wave beam of each antenna exists as follows in the antenna submatrix that the phase shift value of the phase shifter is connect with the phase shifter
Relationship:
Wherein, θ indicates the deflection angle of wave beam,For the phase shift value of the phase shifter, d indicates each antenna in array antenna
The spacing of submatrix, λ are wavelength.
The application second aspect provides a kind of RFID system, comprising:
Phased array antenna as described in the application first aspect or any possible implementation of the application first aspect；
And the radio frequency interface to receive radiofrequency signal；
And power splitter；
Wherein, the input terminal of the power splitter is connect with the radio frequency interface, and the output end of the power splitter with it is described
The phase component of phased array antenna connects.
Therefore the phased array antenna in the application includes array antenna, phase component and communication control module, due to
Communication control module has phase shifting control function, therefore, carries out assignment to phase component by communication control module, can be poised for battle
The phase of each antenna is controlled in array antenna, to realize the phase controlling to each antenna submatrix, and then realizes antenna beam
Dynamic it is adjustable.Relative to the mode of traditional mechanical rotation, the phased-array antenna of the application is not necessarily to artificial rotary antenna side
To so that also avoidable mechanical wear, improves the service life of antenna.
Detailed description of the invention
Fig. 1 is phased array antenna one embodiment structural schematic diagram provided by the present application；
Fig. 2 is antenna submatrix one embodiment structural schematic diagram in phased array antenna provided by the present application；
Fig. 3 is a kind of RFID system structural schematic diagram provided by the present application；
Fig. 4 is the antenna beam scanning schematic diagram provided by the present application using phased array antenna provided by the present application.
Specific embodiment
To enable present invention purpose, feature, advantage more obvious and understandable, below in conjunction with the application
Attached drawing in embodiment, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described reality
Applying example is only some embodiments of the present application, and not all embodiments.Based on the embodiment in the application, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of phased array antenna applied to RFID system.Referring to Fig. 1, the phased array antenna
Include:
The transmitting-receiving integrated array antenna 11 being made of antenna submatrix；
And the phase component 12 being electrically connected with array antenna 11；
And the communication control module 13 of phase shifting control function is electrically connected and had with phase component 12；
Wherein, above-mentioned phase shifting control function is to be controlled by phase of the phase component 12 to each antenna in array antenna 11
The function of system.
In the embodiment of the present application, each antenna can be connected to phase component by feeding network respectively in array electric wire 11, move
Phase component is made of phase-shift circuit.Specifically, phase component may include multichannel phase-shift circuit, every road phase-shift circuit is by phase shifter
Building.So-called phase shifter is a kind of device for referring to be adjusted the phase of wave.
Optionally, array antenna 11 includes more than two antenna submatrixs, and each antenna submatrix can be identical by several
Antenna rearranges according to certain rules.In the embodiment of the present application, antenna submatrix is specifically as follows the antenna submatrix of 1*4, that is, by
4 antennas rearrange according to certain rules.Certainly, the antenna submatrix in the embodiment of the present application can also be by the antenna of other quantity
Submatrix rearranges, for example, antenna submatrix may be the antenna submatrix of 1*6.Specifically, the quantity of antenna submatrix and each day
The antenna amount that line submatrix is included can determine according to beam angle and minor level requirement, herein without limitation.
Further, phase component 12 includes: the phase shifter being electrically connected respectively with each antenna submatrix.Wherein, not on the same day
Line submatrix connects different phase shifters.That is, the excitation phase of each antenna submatrix is controlled to adjust by corresponding phase shifter respectively, with
Form one-dimensional digital beam.In a kind of application scenarios, the spacing between each antenna submatrix in array antenna 11 is equal.
Following relationship may be present in the phase shift value of phase shifter and the deflection angle of wave beam:Wherein, θ is wave beam
Deflection angle (unit can be radian),For the phase shift value (unit can be radian) of phase shifter, d indicates each antenna in array antenna
The spacing (unit can be millimeter) of submatrix, unit mm, λ are wavelength (unit can be millimeter).Since phase component is using simulation
Therefore the mode of phase shift has phase shift range big, the big advantage of input power dynamic range.
Optionally, the antenna of each antenna submatrix in array antenna 11 can be by the metal that etches from thin-medium substrate
Patch is constituted, and each antenna in same antenna submatrix passes through microstrip line and axis.Antenna submatrix 111 as shown in Figure 2, packet
Containing 4 antennas (i.e. antenna submatrix 111 be 1*4 antenna submatrix), every antenna passes through etching on one side in thin-medium substrate
The metal patch 111a of rectangle forms (i.e. microstrip antenna), and the another side of the thin-medium substrate is arranged in the earth plate of every antenna
(not shown).Each antenna is fed by microstrip line 111b and axis probe 111c in antenna submatrix 111.Metal patch 111a
It is arranged regularly and feeds, control is adjusted by the phase fed to metal patch 111a in real time, to may make up transceiver
The array antenna of formula.
Optionally, cut-off by U-type groove 111d as shown in Fig. 2, metal patch 111a shows to offer U-type groove 111d
Original surface current path, flowing through electric current around trough rim complications, path is elongated, and electric current flows through that path is elongated to be equivalent to increase
The equivalent length of antenna, thus the equivalent length for increasing antenna.After the length dimension of antenna is fixed, the resonance of antenna
Frequency is just fixed, therefore, by carrying out slot treatment to metal patch 111a, can reduce antenna size and obtain identical resonance frequency
Rate, and then reduce machine volume.
It should be noted that being to be illustrated by for metal patch 111a shows to open up U-type groove shown in Fig. 2, at it
In its embodiment, other shapes of slot (such as X-type fluting, Z-type fluting etc.) can also be opened up in metal patch 111a, by not
Isocratic mode of grooving realizes the circular polarisation of antenna and can reduce antenna size.Alternatively, can also by metal patch 111a into
The mode of row corner cut realizes the circular polarisation of antenna and reduces antenna size.
It should be noted that being to be illustrated shown in Fig. 2 by taking the metal patch 111a of rectangle as an example, in other embodiments
In, metal patch 111a can also be etched to other shapes, herein without limitation.
Optionally, communication control module 13 by the above D/A converting circuit of built-in two-way (i.e. DAC circuit) processor (example
Such as arm processor) building.Wherein, every road DAC circuit of above-mentioned processor is connect with a phase shifter of phase component 12, i.e., often
Road DAC circuit is correspondingly connected with phase-shift circuit all the way, and multichannel DAC circuit can work at the same time, and exports different voltage according to demand
Value carries out phase shift to control connected phase shifter.Wherein, the voltage of DAC circuit output is bigger, then the DAC circuit is corresponding connects
The angle of the phase shifter phase shift connect is bigger.Using the integrated form controller built in DAC, the control circuit of phased array antenna may make
It is greatly simplified.
Therefore the phased array antenna in the application includes array antenna, phase component and communication control module, due to
Communication control module has phase shifting control function, therefore, carries out assignment to phase component by communication control module, can be poised for battle
The phase of each antenna is controlled in array antenna, to realize the phase controlling to each antenna submatrix, and then realizes antenna beam
Dynamic it is adjustable.Relative to the mode of traditional mechanical rotation, the phased-array antenna of the application is not necessarily to artificial rotary antenna side
To so that also avoidable mechanical wear, improves the service life of antenna.
The embodiment of the present application also provides a kind of RFID system, as shown in figure 3, the RFID system includes:
Phased array antenna；
And the radio frequency interface to receive radiofrequency signal；
And power splitter.
Wherein, the input terminal of above-mentioned power splitter is connect with above-mentioned radio frequency interface, and the output end of above-mentioned power splitter with it is above-mentioned
The phase component of phased array antenna connects.
Wherein, above-mentioned phased array antenna includes: the transmitting-receiving integrated array antenna being made of antenna submatrix, and with it is upper
The phase component of array antenna electrical connection is stated, and is electrically connected with above-mentioned phase component and has the logical of phase shifting control function
Interrogate control module.Specifically, above-mentioned phased array antenna can be such as the phased array antenna mentioned in previous embodiment, herein no longer
It repeats.
Fig. 4 show a kind of antenna beam scanning schematic diagram of above-mentioned RFID system under application scenarios, shown in Fig. 4 to answer
With in scene, phased array antenna is made of two groups of antenna submatrixs and phase component includes two-way phase-shift circuit, every road phase-shift circuit
Connect one group of antenna submatrix.In conjunction with Fig. 3 and Fig. 4 as it can be seen that the radiofrequency signal (such as rf excitation signal) that radio frequency interface receives
After power splitter function point, fed each road phase-shift circuit by feeder line, each road phase-shift circuit is based on the finger from communication control module
It enables and phase shift is carried out to radiofrequency signal, the radiofrequency signal after phase shift is directly fed to each antenna submatrix, forms beam scanning in space.
The above are to provided herein a kind of applied to the phased array antenna of RFID system and the description of RFID system,
For those skilled in the art, it according to the thought of the embodiment of the present application, has in specific embodiments and applications
Change place, to sum up, the contents of this specification should not be construed as limiting the present application.
Claims (9)
1. a kind of phased array antenna applied to RFID system characterized by comprising
The transmitting-receiving integrated array antenna being made of antenna submatrix；
And the phase component with array antenna electrical connection；
And the communication control module of phase shifting control function is electrically connected and had with the phase component；
The phase shifting control function is to be controlled by phase of the phase component to each antenna in the array antenna
Function.
2. phased array antenna according to claim 1, which is characterized in that antenna in each antenna submatrix is by from thin
The metal patch etched on medium substrate is constituted；
And each antenna in same antenna submatrix passes through microstrip line and axis probe feed.
3. phased array antenna according to claim 2, which is characterized in that the metal patch surface offers U-type groove.
4. phased array antenna according to claim 2, which is characterized in that the metal patch is specially rectangular metal patch
Piece.
5. phased array antenna according to claim 2, which is characterized in that the antenna submatrix is specially antenna of 1*4
Battle array.
6. phased array antenna according to claim 2, which is characterized in that the antenna submatrix is specially antenna of 1*6
Battle array.
7. phased array antenna according to any one of claims 1 to 6, which is characterized in that the array antenna includes two
Antenna submatrix described above；
The phase component includes: the phase shifter being electrically connected respectively with each antenna submatrix；
Wherein, different antennae submatrix connects different phase shifters.
8. phased array antenna according to claim 7, which is characterized in that the communication control module by built-in two-way more than
The processor of D/A converting circuit constructs；
Wherein, every number analog conversion circuit of the processor is connect with a phase shifter.
9. a kind of RFID system characterized by comprising
Phased array antenna as claimed in any one of claims 1 to 8；
And the radio frequency interface to receive radiofrequency signal；
And power splitter；
Wherein, the input terminal of the power splitter is connect with the radio frequency interface, and the output end of the power splitter with it is described phased
The phase component of array antenna connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821778772.8U CN209200148U (en) | 2018-10-30 | 2018-10-30 | Phased array antenna and RFID system applied to RFID system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821778772.8U CN209200148U (en) | 2018-10-30 | 2018-10-30 | Phased array antenna and RFID system applied to RFID system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462040A (en) * | 2018-10-30 | 2019-03-12 | 深圳市航天华拓科技有限公司 | Phased array antenna and RFID system applied to RFID system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462040A (en) * | 2018-10-30 | 2019-03-12 | 深圳市航天华拓科技有限公司 | Phased array antenna and RFID system applied to RFID system |
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