CN208209003U - A kind of antenna polarization instantaneous change device based on digital pad - Google Patents
A kind of antenna polarization instantaneous change device based on digital pad Download PDFInfo
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- CN208209003U CN208209003U CN201820778665.9U CN201820778665U CN208209003U CN 208209003 U CN208209003 U CN 208209003U CN 201820778665 U CN201820778665 U CN 201820778665U CN 208209003 U CN208209003 U CN 208209003U
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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 pad.Described device includes one-to-two power splitter, the first feed leg, the second feed leg, PLC technology board and dual-linear polarization antenna；Wherein the first feed leg includes the first digital pad and the first digital phase shifter, and the second feed leg includes the second digital pad and the second digital phase shifter；The utility model has the following beneficial effects: passing through the attenuation of programmable control panel card control digital pad and the phase-shift phase of digital phase shifter, it can be convenient the amplitude and phase of horizontal, vertical polarization directions the electromagnetic wave of quickly regulation, and then realize that the output power in 0 °~90 ° deflection angle ranges relative to horizontal direction is constant, the adjustable linear polarization state transition of the continuous stepping of polarizing angle.
Description
Technical field
The present invention relates to antenna technical fields, are in particular a kind of antenna polarization transition dresses based on digital pad
It sets.
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, dual polarized antenna passes through the orthogonal line pole of transmitting two-way
Change wave and effectively improve the above problem, therefore is used widely.With technically developing, for further satisfaction frequency spectrum benefit
With the demand of rate, anti-interference etc., the Variable Polarization Antenna that developing can work under any polarization state becomes hot issue.
Variable Polarization Antenna has the characteristics that work in any polarization state, can be realized the instantaneous of polarization of ele form
It is variable, it has broad application prospects in the raising availability of frequency spectrum and anti-interference aspect.By working in different polarization states, it is
Channeling may be implemented in system, and then improves the availability of frequency spectrum, or the communication of polarizing field is realized by the switching of polarization state
Encryption；The polarized state that signal is received by detection adjusts the polarization of receiving antenna, realizes the polarization with transmitting antenna
Match, reduces the polarization loss of signal, or the polarization of adjustment receiving antenna, realize the polarization isolation with interference signal, subtract
The interference of few noise signal.Therefore, Variable Polarization Antenna can be widely used in the systems such as base station communication, satellite communication, radar.
Existing Variable Polarization Antenna typically refer to polarized state can vertical/horizontal polarize, ± 45 ° polarization and it is left-handed/
The antenna of free switching between right-handed circular polarization.In the prior art, by increasing specific device, dual polarized antenna is made to realize pole
Change state is capable of the Variable Polarization Antenna function of continuous step change, and the current open source information in relation to above-mentioned apparatus is not yet found.
Summary of the invention
Realize that polarized state is capable of the day of continuous step change based on digital pad the object of the present invention is to provide a kind of
Linear polarization instantaneous change device.Described device can be realized following function, i.e., the identical radiofrequency signal of the two-way of input is transformed into tool
There is the amplitude relation of setting and the identical two-way radiofrequency signal of phase is launched by dual-linear polarization antenna.
The technical scheme is that
A kind of antenna polarization instantaneous change device based on digital pad, which is characterized in that described device includes one-to-two function
Divide device, the first feed leg, the second feed leg, PLC technology board and dual-linear polarization antenna；Wherein the first feed leg
Including the first digital pad and the first digital phase shifter, the second feed leg includes that the second digital pad and the second number are moved
Phase device；Two-way radiofrequency signal respectively enters the first feed leg, after power equal part by one-to-two power splitter input port feed-in
Two feed legs respectively enter the horizontal polarization port and vertical pole of dual-linear polarization antenna after amplitude fading and phase equilibrium
Change port, synthesizes the different linear polarised electromagnetic wave radiation of polarizing angle.The attenuation of the attenuator can walk in attenuation range
Into variation, the phase shifter is then used to compensate the phase of two feed legs balance, and the PLC technology board is used
In digital pad and digital phase shifter progress remote real_time control to two travel permit feed legs.PLC technology board uses
FPGA programme control circut is realized, after FPGA programme control circut receives the instruction for needing the polarizations type exported, programme control circut
By the antenna polarization transmitting table pre-entered, to digital pad and shift to device and control, conveniently regulation it is horizontal,
The electromagnetism wave amplitude phase of vertical polarization directions, realizes being switched fast for polarization state.
Working principle of the present invention is as follows: set input two-way radiofrequency signal be respectively both horizontally and vertically on line pole
Change electromagnetic wave Eh、Ev, wherein polarizing angle α is defined as and horizontal directionAngle:
EmIndicate total electric field amplitude, ω indicate angular frequency, k indicate propagation constant, z indicate electromagnetic wave the direction z propagate away from
From two-way radiofrequency signal is in space combination linear polarised electromagnetic wave
E (z, t)=Emcos(ωt-kz)
Synthesize the polarizing angle α and E of linear polarised electromagnetic waveh、EvRelationship it is as follows:
By adjusting attenuator attenuation amplitude, so that two-way radiofrequency signal meets the amplitude relation and phase with setting
It is identical, then the linear polarised electromagnetic wave with particular polarization angle can be given off in space.
The invention has the benefit that
Pass through the attenuation of programmable control panel card control digital pad and the phase-shift phase of digital phase shifter, Ke Yifang
Just quickly amplitude and phase of horizontal, vertical polarization directions the electromagnetic waves of regulation, so realize 0 ° relative to horizontal direction~
Output power in 90 ° of deflection angle ranges is constant, the adjustable linear polarization state transition of the continuous stepping of polarizing angle.
Detailed description of the invention
Fig. 1 is to use the device of the invention structural block diagram；
Fig. 2 is orthogonal dual-linear polarization decomposition diagram of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
Fig. 1 is the device of the invention structural block diagram.Described device includes one-to-two power splitter 1, the first feed leg 2,
Two feed legs 3, PLC technology board 4 and dual-linear polarization antenna 5；The input port 11 of one-to-two power splitter 1 is used as this dress
The input port set；First feed leg 2 includes the first digital pad 21 and the first digital phase shifter 22, the second feed leg
3 include the second digital pad 31 and the second digital phase shifter 32.
Two-way radiofrequency signal by one-to-two power splitter 1 11 feed-in of input port, after power equal part, from one-to-two power splitter
The radiofrequency signal that 1 output port 12 exports enters the first feed leg 2, moves by the first digital pad 21 and the first number
Enter the horizontal polarization port 51 of dual-linear polarization antenna 5 after phase device 22；It is penetrated from what the output port 13 of one-to-two power splitter 1 exported
Frequency signal enters the second feed leg 3, and 5 enter dual-linear polarization after the second digital pad 31 and the second digital phase shifter 32
The vertical polarization port 52 of antenna generates horizontal polarized wave and vertically polarized wave respectively.Wherein, the first digital pad 21 and
Two digital pads 31 play a major role in polarizing angle control, and the first digital phase shifter 22 and the second digital phase shifter 32 play
Phase compensation is so as to reach the consistent effect of signal phase of horizontal polarization port 51 and vertical polarization port 52, because of two-wire pole
Changing antenna 5 requires the polarization state consistency for reaching its horizontal polarization port and the radiofrequency signal of vertical polarization port two high, including
Gain is identical, phase shift is identical.In the present embodiment, the first digital pad 21 is identical with 31 parameter of the second digital pad, decaying
Stepping-in amount is 1.0dB, and attenuation accuracy is ± 0.2dB, digit N=4bit, attenuation range 15dB, additional phase shift amount is less than≤
5 °, PLC technology board 4 passes through TTL Interface Controller the first digital pad 21 and the second digital pad 31 and the first number
Word phase shifter 22 and the second digital phase shifter 32, particularly, since the additional phase shift amount of attenuator differential declines amount is smaller,
Phase equilibrium is carried out without digital phase shifter in the present embodiment.
Polarizing angle and the physical relationship of digital pad attenuation are as follows:
As shown in Fig. 2, polarizing angle α is defined as linear polarised electromagnetic wave and horizontal directionAngle, α corresponding linear polarization electricity
Magnetic wave E can be decomposed into the linear polarised electromagnetic wave E on both horizontally and verticallyh、Ev:
E (z, t)=Emcos(ωt-kz)
Therefore polarizing angle α and Eh、EvRelationship have:
Meet relationship between power and electric field amplitude,
Wherein η is free space wave impedance, unit Ω.
Horizontal polarized wave corresponds to the first digital pad 21, corresponding second digital pad 31 of vertically polarized wave, decaying
Measure A1、A2It is respectively as follows:
Wherein A1、A2For the attenuation of the first digital pad 21 and the second digital pad 31, A1、A2For negative, unit
For dB.PmFor general power, PhAnd PvRespectively horizontal polarization wave power and vertical polarization wave power.Digital pad in the present invention
Attenuation be according to stepping attenuation step change, therefore two-way attenuator 21 and 31 can according to all attenuation states,
The attenuation close to above formula calculated value is selected to combine the polarized state needed for generating.
Since there is a certain error for the attenuation of digital pad in the present invention, inevitably to polarizing angle
Bring error.If the attenuation accuracy of digital pad is ± δ dB, forward direction, the negative sense limit error of any polarizing angle are as follows:
Wherein Δp、ΔnForward direction, negative sense limit error for any polarizing angle.A1、A2For the first digital pad 21 and
The attenuation of two digital pads 31, numerical value are negative, unit dB.
In principle when digital pad digit is N, antenna exports the attenuator combination of linear polarised electromagnetic wave constant amplitude
Share 2N+1- a kind, 2 can be generatedN+1- a kind of different polarization state, but due to attenuator stepping-in amount, attenuation accuracy and decaying model
The influence enclosed, adjacent polarized angular spacing will be unable to distinguish when too small, it is therefore desirable to choose reasonable attenuator according to the actual situation
Digit and corresponding parameter.For table first is that a certain embodiment realized using the present invention, the table shows all polarizing angles, the limit to miss
Difference, the relationship between normalized output power and digital pad attenuation.Attenuator stepping-in amount is 1.0dB in the present embodiment,
Attenuation accuracy is ± 0.2dB, and digit N is 4bit, the polarization state deflection angle actually generated, error, normalization radiant power and right
Answer attenuator state as shown in table 1.By table one as it can be seen that the system can be realized 31 kinds of stable polarization states, all polarization states pair
The normalization radiant power answered keeps stablizing, the corresponding polarizing angle distributed area no overlap of all polarization states.
Table one
Claims (2)
1. a kind of antenna polarization instantaneous change device based on digital pad, it is characterised in that: described device includes one-to-two function point
Device, the first feed leg, the second feed leg, PLC technology board and dual-linear polarization antenna；Wherein the first feed leg packet
The first digital pad and the first digital phase shifter are included, the second feed leg includes the second digital pad and the second digital phase shift
Device；Two-way radiofrequency signal respectively enters the first feed leg, second after power equal part by one-to-two power splitter input port feed-in
Feed leg respectively enters horizontal polarization port and the vertical polarization of dual-linear polarization antenna after amplitude fading and phase equilibrium
Port synthesizes the different linear polarised electromagnetic wave radiation of polarizing angle；The attenuation of the attenuator can the stepping in attenuation range
Variation, the phase shifter are then used to compensate the phase of two feed legs balance, and the PLC technology board is used for
Digital pad and digital phase shifter to two travel permit feed legs carry out remote real_time control, and PLC technology board uses
FPGA programme control circut is realized, after FPGA programme control circut receives the instruction for needing the polarizations type exported, programme control circut
By the antenna polarization transmitting table pre-entered, to digital pad and shift to device and control, conveniently regulation it is horizontal,
The electromagnetism wave amplitude phase of vertical polarization directions, realizes being switched fast for polarization state.
2. the antenna polarization instantaneous change device based on digital pad according to claim 1, it is characterised in that: the first number declines
The decaying stepping-in amount for subtracting device and the second digital pad is 1.0dB, and attenuation accuracy is ± 0.2dB, digit N=4bit, model of decaying
It encloses for 15dB, additional phase shift amount is less than≤5 °.
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| CN201820778665.9U CN208209003U (en) | 2018-05-24 | 2018-05-24 | A kind of antenna polarization instantaneous change device based on digital pad |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493613A (en) * | 2018-05-24 | 2018-09-04 | 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 pad |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493613A (en) * | 2018-05-24 | 2018-09-04 | 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 pad |
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