CN108777369A - 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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- CN108777369A CN108777369A CN201810505532.9A CN201810505532A CN108777369A CN 108777369 A CN108777369 A CN 108777369A CN 201810505532 A CN201810505532 A CN 201810505532A CN 108777369 A CN108777369 A CN 108777369A
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- 230000010287 polarization Effects 0.000 title claims abstract description 82
- 230000010363 phase shift Effects 0.000 claims abstract description 24
- 230000009977 dual effect Effects 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention 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；Beneficial effects of the present invention are：Pass through the phase-shift phase of the automatically controlled digital phase shifter of PLC technology board, left-handed, right-handed circular polarization direction electromagnetic wave phase can conveniently and efficiently be regulated and controled, 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 without largely using attenuator, is avoided that additional power loss.
Description
Technical field
The present invention relates to antenna technical fields, are in particular a kind of antenna polarization transition dresses based on digital phase shifter
It sets.
Background technology
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, anti-interference etc. the needs of, Variable Polarization Antenna, which has, is operated in a variety of polarization states
Feature can realize the instantaneous variable of polarization of ele form, improve the availability of frequency spectrum, anti-interference and communication encryption etc.
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 to realize polarization control by controlling the amplitude of two quadrature linear polarization signals
System, needs largely to use attenuator, can 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, and polarized state accuracy can be caused to decline, and systematic error is larger.
Invention content
The object of the present invention is to provide a kind of polarized states realized based on digital phase shifter to be capable of continuous step change
Antenna polarization instantaneous change device.Described device can realize following function, i.e., be transformed into the identical radiofrequency signal of the two-way of input
The identical two-way radiofrequency signal of phase relation and amplitude with setting is launched by dual circularly polarized antenna.
The technical scheme is that：
A kind of antenna polarization instantaneous change device based on digital phase shifter, which is characterized in that the device includes one-to-two work(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 decile, two
The break-make of feed leg is controlled by switch, and two paths of signals enters double-circle polarization day 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, and the digital pad then uses
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 circuts to realize, needs to export when FPGA programme control circuts receive
Polarizations type instruction after, programme control circut is by the antenna polarization transmitting table that pre-enters, to digital pad and shifting
It is controlled to device, conveniently regulation and control level, the electromagnetism wave amplitude phase of vertical polarization directions, realizes quickly cutting for polarization state
It changes.
Working principle of the present invention is as follows：If the two-way radiofrequency signal of input corresponds to the circular polarisation in left-handed and clockwise direction
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 that propagation constant, z indicate electromagnetic wave in the directions 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 levels of the corresponding linear polarised electromagnetic waves of α, vertical direction
Change component Eh、EvFor：
Wherein, EmIndicate total electric field amplitude,The unit vector being illustrated respectively on the directions x and y.
The relationship of polarizing angle α and phase difference is at this time：
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.
Beneficial effects of the present invention are：
By the phase-shift phase of the automatically controlled digital phase shifter of PLC technology board, it can conveniently and efficiently 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-
It answers fast, stable output power and without largely using attenuator, is avoided that additional power loss.
Description of the drawings
Fig. 1 is the device of the invention structure diagram；
Fig. 2 is the orthogonal double-circle polarization decomposition diagram of the present invention.
Specific implementation mode
Below to realize 33 kinds of linear polarization states as specific example, in conjunction with attached drawing, the present invention is described in detail.
Fig. 1 is the device of the invention structure diagram.The device includes one-to-two power splitter 1, the first feed leg 2, second
The input port 11 of feed leg 3, PLC technology board 4 and dual circularly polarized antenna 5, one-to-two power splitter 1 is used as this dress
The input port set；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 that second switch 31 and number decline
Subtract device 32.
Radiofrequency signal respectively enters the first feed branch after power decile by 11 feed-in of input port of one-to-two power splitter 1
Road 2 and the second feed leg 3, into the first feed leg 2 radiofrequency signal after first switch 21 and digital phase shifter 22
Into the left-hand circular polarization port 51 of dual circularly polarized antenna 5, left-hand circular polarization electromagnetic wave is generated；Into the second feed leg 3
Radiofrequency signal enters the right-handed circular polarization port 52 of dual circularly polarized antenna 5, production after second switch 31 and digital pad 32
Raw right-handed circular polarization electromagnetic wave.Wherein, digital phase shifter 22 plays a major role in polarization state control, by selecting suitable phase
Shifting amount can make the radiofrequency signal of arrival left-hand circular polarization port 51 and right-handed circular polarization port 52 generate phase difference, and digital
Attenuator 32 then plays the role of amplitude balance, and the radio frequency of arrival left-hand circular polarization port 51 and right-handed circular polarization port 52 is made to believe
Number power is identical, because dual circularly polarized antenna 5 requires to reach its left-hand circular polarization port 51 and 52 two-way of right-handed circular polarization port
The circular polarisation state consistency of radiofrequency signal is high, including gain is identical, phase shift is identical.In the present embodiment, 22 phase shift of digital phase shifter
Stepping-in amount is 5.625 °, and phase shift root-mean-square error is ± 1.0 °, digit N=5bit, and phase shift range is 180 °, and insertion loss is
5.0dB, amplitude scintillation≤0.5dB, reaction time are less than 30ns, and PLC technology board 4 passes through TTL Interface Controller first switches
21, second switch 31, digital phase shifter 22 and digital pad 32.Particularly, since 22 different conditions of digital phase shifter are defeated
It is smaller to go out power magnitude fluctuating, therefore digital pad 32 balances digital phase shifter 22 using fixed attenuator 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 directions 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
In the radiofrequency signal of the first feed leg 2 delayed phase, phase difference φ are generated by digital phase shifter 22.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 point in the levels of the corresponding linear polarised electromagnetic waves of α, vertical direction
Measure Eh、EvFor：
Wherein, EmIndicate that total electric field amplitude, k indicate that propagation constant, z indicate electromagnetic wave in the directions z propagation distance, φ two
Oppositely oriented circular polarisation electromagnetic wave phase differences,The unit vector being illustrated respectively on the directions x and y.
The relationship of polarizing angle α and phase difference is at this time：
Wherein, Eh、EvThe linear polarization electric field on both horizontally and vertically is indicated respectively.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 phase shift in the present invention
Step change is measured, therefore polarizing angle can be according to the half step change of the minimum phase shift amount of digital phase shifter 22, polarizing angle
Angular range be 22 phase shift range of digital phase shifter half, the precision of the phase-shift phase of digital phase shifter 22 also can be to polarizing angle
Bring error.If the phase shifting accuracy of digital phase shifter 22 is ± δ, the error of any polarizing angle is：
| 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 of difference
Linear polarization state, but when digital phase shifter phase shift is too small, precision is poor, adjacent polarized angular spacing will too small, polarization
Angle error is excessive to cause adjacent polarized state is overlapping cannot be distinguished, it is therefore desirable to choose rational digital phase shift according to actual demand
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 to produce
Raw polarization state deflection angle, error, normalization radiant power and corresponding attenuator state are as shown in table 1.By table as it can be seen that the system
Exporting the different stabilization linear polarization state of 32 kinds of polarizing angles, all linear polarization states can also be realized outside two kinds of circular polarisation
Corresponding normalization radiant power 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)；Two-way radiofrequency signal is by input port (11) feed-in of one-to-two power splitter (1), power decile
After respectively enter the first feed leg (2) and the second feed leg (3), the break-makes of two feed legs by first switch (21) and
Second switch (31) controls, and two paths of signals enters a left side for 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) is then used to compensate balance to the power magnitude of two feed legs, described programmable
Control card (4) is used to carry out remote real_time control to digital phase shifter (22) and digital pad (32), uses FPGA journeys
It controls circuit to realize, after FPGA programme control circuts receive the instruction for the polarizations type for needing to export, programme control circut passes through pre-
The antenna polarization transmitting table first inputted shifts to device (22) to number and digital pad (32) controls, 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 phase
It is 5.625 ° to move device (22) phase shift, 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 the antenna polarization instantaneous change device based on digital phase shifter described in claims 1 to 3 any bar, 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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| CN201810505532.9A CN108777369A (en) | 2018-05-24 | 2018-05-24 | A kind of antenna polarization instantaneous change device based on digital phase shifter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048911A (en) * | 2019-12-02 | 2020-04-21 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing random polarization switching |
| WO2020124952A1 (en) * | 2018-12-20 | 2020-06-25 | 胡南 | Multiple polarization loudspeaker antenna employing electrically-controlled switching technique |
| 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 |
| WO2021237752A1 (en) * | 2020-05-29 | 2021-12-02 | 华为技术有限公司 | Radio-frequency chip |
| CN116914441A (en) * | 2023-09-14 | 2023-10-20 | 迪泰（浙江）通信技术有限公司 | Satellite antenna spin polarization switching method based on Ka band planar array |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020124952A1 (en) * | 2018-12-20 | 2020-06-25 | 胡南 | Multiple polarization loudspeaker antenna employing electrically-controlled switching technique |
| US11139578B1 (en) | 2018-12-20 | 2021-10-05 | Nan Hu | Electrically-controlled switching multi-polarization horn antenna |
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| CN116914441A (en) * | 2023-09-14 | 2023-10-20 | 迪泰（浙江）通信技术有限公司 | Satellite antenna spin polarization switching method based on Ka band planar array |
| CN116914441B (en) * | 2023-09-14 | 2023-12-29 | 迪泰（浙江）通信技术有限公司 | Satellite antenna spin polarization switching method based on Ka band planar array |
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Application publication date: 20181109 |