CN208209009U - A kind of antenna polarization instantaneous change device based on digital phase shifter - Google Patents
A kind of antenna polarization instantaneous change device based on digital phase shifter Download PDFInfo
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- CN208209009U CN208209009U CN201820778882.8U CN201820778882U CN208209009U CN 208209009 U CN208209009 U CN 208209009U CN 201820778882 U CN201820778882 U CN 201820778882U CN 208209009 U CN208209009 U CN 208209009U
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Abstract
The utility model relates to antenna technical fields, are in particular a kind of antenna polarization instantaneous change devices based on digital phase shifter.The device includes one-to-two power splitter, the first feed leg, the second feed leg, PLC technology board and dual circularly polarized antenna, wherein the first feed leg includes first switch and digital phase shifter, and the second feed leg includes second switch and digital pad；The utility model has the following beneficial effects: passing through the phase-shift phase of the automatically controlled digital phase shifter of PLC technology board, it can be convenient and quickly regulate and control left-handed, right-handed circular polarization direction electromagnetic wave phase, and then realization output power is constant, the adjustable linear polarization state transition of the continuous stepping of polarizing angle, and single left or right rotation circular polarisation electromagenetic wave radiation can also be generated additionally by switching.This method precision is high, react fast, stable output power and uses attenuator without a large amount of, is avoided that additional power loss.
Description
Technical field
The utility model relates to antenna technical fields, are in particular a kind of antenna polarization winks based on digital phase shifter
Become device.
Background technique
As frequency spectrum resource increasingly consumes, communications-intensive degree is constantly promoted, single-polarized antenna can not be complete
Meet modern communications the availability of frequency spectrum, in terms of the needs of, Variable Polarization Antenna have work in a variety of polarization states
Feature can be realized the instantaneous variable of polarization of ele form, improve the availability of frequency spectrum, it is anti-interference and in terms of
It has broad application prospects.Current Variable Polarization Antenna mainly in such a way that machinery rotates or is automatically controlled, typically refers to vertical/water
The switching of the polarized states such as mean pole, ± 45 ° of polarization and left-hand/right-hand circular polarisation realizes that polarized state connects using electric-control method
There has been no concrete implementations for the polarization system of continuous variation.
Polarization method based on attenuator is that polarization control is realized by controlling the amplitude of two quadrature linear polarization signals
System, needs largely to use attenuator, will cause serious power loss, and there is also fluctuatings for the output power of composite wave, and
The precision of attenuator also can bring error to polarizing angle, will cause polarized state accuracy decline, and systematic error is larger.
Utility model content
The purpose of the utility model is to provide a kind of polarized states realized based on digital phase shifter being capable of continuous stepping change
The antenna polarization instantaneous change device of change.Described device can be realized following function, i.e., becomes the identical radiofrequency signal of the two-way of input
Phase relation and the identical two-way radiofrequency signal of amplitude with setting is changed into launch by dual circularly polarized antenna.
The technical solution of the utility model is:
A kind of antenna polarization instantaneous change device based on digital phase shifter, which is characterized in that the device includes one-to-two function point
Device, the first feed leg, the second feed leg, PLC technology board and dual circularly polarized antenna, wherein the first feed leg
Including first switch and digital phase shifter, the second feed leg includes second switch and digital pad；Two-way radiofrequency signal by
The input port feed-in of one-to-two power splitter, respectively enters the first feed leg and the second feed leg after power equal part, and two
The on-off of feed leg enters double-circle polarization day by switch control, two paths of signals after phase delay and amplitude balance respectively
The left-hand circular polarization port and right-handed circular polarization port of line synthesize the linear polarization of left-handed, right-handed circular polarization and different deflection angles
Radiation.Single left or right rotation circular polarisation electromagenetic wave radiation can also be generated additionally by switching.The digital phase shift
Device can in its phase shift range step change so that two-way circular polarisation electromagnetic wave generates phase difference, the digital pad then used
Balance is compensated in the power magnitude to two feed legs, the PLC technology board is used for digital phase shifter sum number
Word attenuator carries out remote real_time control, uses FPGA programme control circut to realize, needs to export when FPGA programme control circut receives
Polarizations type instruction after, programme control circut passes through the antenna polarization transmitting table that pre-enters, to digital pad sum number
Word phase shifter is controlled, and conveniently regulation level, the electromagnetism wave amplitude phase of vertical polarization directions, realize the quick of polarization state
Switching.
The working principle of the utility model is as follows: the two-way radiofrequency signal for setting input corresponds to the left-handed circle in clockwise direction
Polarized electromagnetic wave EL、ER, two-way electromagnetic wave is in space combination linear polarised electromagnetic wave E:
Wherein ω indicates that angular frequency, k indicate propagation constant, and z indicates electromagnetic wave in the direction z propagation distance, left-hand circular polarization
Electromagnetic wave phase is than right-handed circular polarization electromagnetic wave delayed phase φ.Wherein left-handed, right-handed circular polarization electromagnetic wave unit vectorWith horizontal linear polarization, vertical linear polarization unit vectorBetween relationship be
Identical, the oppositely oriented circular polarisation electromagnetic wave superposition of two-way amplitude can form linear polarised electromagnetic wave, therefore left-handed circle
Polarized electromagnetic wave electric field amplitude ELRight-handed circular polarization electromagnetic wave electric field amplitude E need to be equal toR.By the pole of the linear polarised electromagnetic wave of synthesis
Change angle α and is defined as total electric field and horizontal directionAngle, the line pole in the level of the corresponding linear polarised electromagnetic wave of α, vertical direction
Change component Eh、EvAre as follows:
Wherein, EmIndicate total electric field amplitude,Respectively indicate the unit vector in the x and y direction.
The relationship of polarizing angle α and phase difference at this time are as follows:
Z indicates integer.Above formula illustrates that left-hand circular polarization electromagnetic wave phase than right-handed circular polarization electromagnetic wave phase delay φ, then closes
At linear polarised electromagnetic wave polarizing angle beBy adjusting the phase-shift phase of digital phase shifter, so that two-way radiofrequency signal meets tool
There is the phase relation of setting and amplitude is identical, then can give off the linear polarization electromagnetism with particular polarization angle in space
Wave.
The utility model has the following beneficial effects:
By the phase-shift phase of the automatically controlled digital phase shifter of PLC technology board, it can be convenient and quickly regulate and control left-handed, dextrorotation
The electromagnetic wave phase in circular polarisation direction, and then realization output power is constant, the continuous stepping of polarizing angle adjustable linear polarization state wink
Become, single left or right rotation circular polarisation electromagenetic wave radiation can also be generated additionally by switching.This method precision is high, anti-
Answer fast, stable output power and without largely using attenuator, being avoided that additional power loss.
Detailed description of the invention
Fig. 1 is the apparatus structure block diagram of the utility model；
Fig. 2 is the orthogonal double-circle polarization decomposition diagram of the utility model.
Specific embodiment
Below to realize that 33 kinds of linear polarization states as specific example, are described in detail the utility model in conjunction with attached drawing.
Fig. 1 is the apparatus structure block diagram of the utility model.The device include one-to-two power splitter 1, the first feed leg 2,
Second feed leg 3, PLC technology board 4 and dual circularly polarized antenna 5,11 conduct of input port of one-to-two power splitter 1
The input port of the present apparatus；Wherein one-to-two power splitter 1 includes input port 11, the first output port 12 and second output terminal
Mouth 13；First feed leg 2 includes first switch 21 and digital phase shifter 22, and the second feed leg 3 includes 31 He of second switch
Digital pad 32.
Radiofrequency signal respectively enters the first feed branch after power equal part by 11 feed-in of input port of one-to-two power splitter 1
Road 2 and the second feed leg 3, the radiofrequency signal into the first feed leg 2 pass through first switch 21 and digital phase shifter 22
The left-hand circular polarization port 51 for entering dual circularly polarized antenna 5 afterwards, generates left-hand circular polarization electromagnetic wave；Into the second feed leg 3
Radiofrequency signal after second switch 31 and digital pad 32 enter dual circularly polarized antenna 5 right-handed circular polarization port 52,
Generate right-handed circular polarization electromagnetic wave.Wherein, digital phase shifter 22 plays a major role in polarization state control, suitable by selecting
Phase-shift phase can make the radiofrequency signal for reaching left-hand circular polarization port 51 and right-handed circular polarization port 52 generate phase difference, and count
Word attenuator 32 then plays the role of amplitude balance, makes to reach penetrating for left-hand circular polarization port 51 and right-handed circular polarization port 52
Frequency signal power is identical, because dual circularly polarized antenna 5 requires to reach its left-hand circular polarization port 51 and right-handed circular polarization port 52
The circular polarisation state consistency of two-way radiofrequency signal is high, including gain is identical, phase shift is identical.In the present embodiment, digital phase shifter 22
Phase shift is 5.625 °, and phase shift root-mean-square error is ± 1.0 °, digit N=5bit, and phase shift range is 180 °, insertion loss
For 5.0dB, amplitude scintillation≤0.5dB, the reaction time is less than 30ns, and PLC technology board 4 is opened by TTL Interface Controller first
Close 21, second switch 31, digital phase shifter 22 and digital pad 32.Particularly, due to 22 different conditions of digital phase shifter
Output power amplitude scintillation is smaller, therefore digital pad 32 uses fixed attenuator to balance digital phase shifter 22 in the present embodiment
Insertion loss, attenuation 5.0dB.
Polarizing angle is defined as the angle of linear polarised electromagnetic wave and horizontal direction, the tool of polarizing angle and digital phase shifter phase-shift phase
Body relationship is as follows:
When the conducting of first switch 21, second switch 31 disconnect, aerial radiation left-hand circular polarization electromagnetic wave；Work as first switch
When 21 disconnect, second switch 31 is connected, aerial radiation right-handed circular polarization electromagnetic wave.
When first switch 21, second switch 31 are all connected, as shown in Fig. 2, dual circularly polarized antenna 5 can generate rotation direction phase
Anti- left-hand circular polarization electromagnetic wave and right-handed circular polarization electromagnetic wave, composite wave can be analyzed to the synthesis of above-mentioned circular polarisation electromagnetic wave,
By taking circular polarisation electromagnetic wave is propagated in the direction z as an example, it is represented by
Wherein ELIt is left-hand circular polarization electromagnetic wave electric field amplitude, ERIt is right-handed circular polarization electromagnetic wave electric field amplitude,It is left-handed
The unit vector of circular polarisation electromagnetic wave,It is the unit vector of right-handed circular polarization electromagnetic wave, left-hand circular polarization electromagnetic wave port institute
Delayed phase, phase difference φ are generated by digital phase shifter 22 in the radiofrequency signal of the first feed leg 2.Left-handed, dextrorotation circle
The unit vector of polarized electromagnetic waveWith horizontal linear polarization, vertical linear polarization unit vectorBetween relationship be
Identical, the oppositely oriented circular polarisation electromagnetic wave superposition of two-way amplitude can form linear polarised electromagnetic wave, therefore left-handed circle
Polarized electromagnetic wave electric field amplitude ELRight-handed circular polarization electromagnetic wave electric field amplitude E need to be equal toR.By the pole of the linear polarised electromagnetic wave of synthesis
Change angle α is defined as and horizontal directionAngle, the linear polarization components in the level of the corresponding linear polarised electromagnetic wave of α, vertical direction
Eh、EvAre as follows:
Wherein, EmIndicate total electric field amplitude, k indicates propagation constant, and z indicates electromagnetic wave in the direction z propagation distance, φ two
Oppositely oriented circular polarisation electromagnetic wave phase differences,Respectively indicate the unit vector in the x and y direction.
The relationship of polarizing angle α and phase difference at this time are as follows:
Wherein, Eh、EvRespectively indicate the linear polarization electric field on both horizontally and vertically.Above formula illustrates left-hand circular polarization electromagnetism
Wave compares right-handed circular polarization electromagnetic wave phase delay φ, then the linear polarised electromagnetic wave polarizing angle synthesized isTherefore digital phase shift
The performance of device directly determines the performance of polarization system.The phase-shift phase of digital phase shifter 22 is according to minimum in the utility model
Phase-shift phase step change, therefore polarizing angle can be according to the half step change of the minimum phase shift amount of digital phase shifter 22, pole
The angular range for changing angle is the half of 22 phase shift range of digital phase shifter, and the precision of the phase-shift phase of digital phase shifter 22 also can be to pole
Change angle and brings error.If the phase shifting accuracy of digital phase shifter 22 is ± δ, the error of any polarizing angle are as follows:
| Δ |=δ/2
In principle when digital phase shifter digit is N, and phase shift range is no more than 360 °, antenna can generate 2N+ a kind is not
Same linear polarization state, but when digital phase shifter phase shift is too small, precision is poor, adjacent polarized angular spacing will too small, pole
Change angle error is excessive to cause adjacent polarized state is overlapping cannot be distinguished, it is therefore desirable to choose reasonably digital move according to actual needs
Phase device.Digital phase shifter stepping-in amount is 5.625 ° in the present embodiment, and phase shift root-mean-square error is ± 1.0 °, digit 5bit, practical
The polarization state deflection angle of generation, error, normalization radiant power and corresponding attenuator state are as shown in table 1.By table as it can be seen that this is
System can also realize the different stabilization linear polarization state of 32 kinds of polarizing angles, all linear polarization shapes outside two kinds of circular polarisation exporting
The corresponding normalization radiant power of state is stablized, polarizing angle distributed area no overlap.
Table 1
Claims (4)
1. a kind of antenna polarization instantaneous change device based on digital phase shifter, it is characterised in that: the device includes one-to-two power splitter
(1), the first feed leg (2), the second feed leg (3), PLC technology board (4) and dual circularly polarized antenna (5), wherein
First feed leg (2) includes first switch (21) and digital phase shifter (22), and the second feed leg (3) includes second switch
(31) and digital pad (32)；Input port (11) feed-in of two-way radiofrequency signal by one-to-two power splitter (1), power equal part
After respectively enter the first feed leg (2) and the second feed leg (3), the on-off of two feed legs by first switch (21) and
Second switch (31) control, two paths of signals enter the left side of dual circularly polarized antenna (5) after phase delay and amplitude balance respectively
Hand circular polarization port (51) and right-handed circular polarization port (52) synthesize the line pole of left-handed, right-handed circular polarization and different deflection angles
Change radiation；The digital phase shifter (22) can in its phase shift range step change so that two-way circular polarisation electromagnetic wave generate phase
Potential difference, the digital pad (32) are described programmable then for compensating balance to the power magnitude of two feed legs
Control card (4) is used to carry out remote real_time control to digital phase shifter (22) and digital pad (32), uses FPGA journey
It controls circuit to realize, after FPGA programme control circut receives the instruction for needing the polarizations type exported, programme control circut passes through pre-
The antenna polarization transmitting table first inputted, controls digital phase shifter (22) and digital pad (32), conveniently adjusts
Control level, the amplitude and phase of vertical polarization directions electromagnetic wave, realize being switched fast for polarization state.
2. the antenna polarization instantaneous change device based on digital phase shifter according to claim 1, it is characterised in that: the number is moved
Phase device (22) phase shift is 5.625 °, and phase shift root-mean-square error is ± 1.0 °, digit N=5bit, and phase shift range is 180 °,
Insertion loss is 5.0dB, amplitude scintillation≤0.5dB, and the reaction time is less than 30ns.
3. the antenna polarization instantaneous change device based on digital phase shifter according to claim 1, it is characterised in that: the number declines
Subtract device (32) using the insertion loss of fixed attenuator balance digital phase shifter (22), attenuation 5.0dB.
4. according to claim 1 to the antenna polarization instantaneous change device described in 3 any bars based on digital phase shifter, it is characterised in that:
Single left or right rotation circular polarisation electromagenetic wave radiation can also be generated by first switch (21) and second switch (31) switching.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777369A (en) * | 2018-05-24 | 2018-11-09 | 湖南国科锐承电子科技有限公司 | A kind of antenna polarization instantaneous change device based on digital phase shifter |
| CN110911834A (en) * | 2019-12-02 | 2020-03-24 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing left-right rotation circular polarization switching |
| CN111293756A (en) * | 2020-03-23 | 2020-06-16 | 电子科技大学 | Wireless charging device, system, method, mobile terminal and storage medium |
| CN112003001A (en) * | 2020-08-12 | 2020-11-27 | 上海交通大学 | Omnidirectional dual-circular polarization based phased random multi-polarization antenna and multi-polarization channel communication system |
-
2018
- 2018-05-24 CN CN201820778882.8U patent/CN208209009U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777369A (en) * | 2018-05-24 | 2018-11-09 | 湖南国科锐承电子科技有限公司 | A kind of antenna polarization instantaneous change device based on digital phase shifter |
| CN110911834A (en) * | 2019-12-02 | 2020-03-24 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing left-right rotation circular polarization switching |
| CN111293756A (en) * | 2020-03-23 | 2020-06-16 | 电子科技大学 | Wireless charging device, system, method, mobile terminal and storage medium |
| CN111293756B (en) * | 2020-03-23 | 2021-10-01 | 电子科技大学 | Wireless charging device, system, method, mobile terminal and storage medium |
| CN112003001A (en) * | 2020-08-12 | 2020-11-27 | 上海交通大学 | Omnidirectional dual-circular polarization based phased random multi-polarization antenna and multi-polarization channel communication system |
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