CN102354798A - Magnetically controlled beam variable plasma antenna array - Google Patents
Magnetically controlled beam variable plasma antenna array Download PDFInfo
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- CN102354798A CN102354798A CN2011102360949A CN201110236094A CN102354798A CN 102354798 A CN102354798 A CN 102354798A CN 2011102360949 A CN2011102360949 A CN 2011102360949A CN 201110236094 A CN201110236094 A CN 201110236094A CN 102354798 A CN102354798 A CN 102354798A
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Abstract
The invention discloses a magnetically controlled beam variable plasma antenna array. The array comprises a plurality of magnetically controlled plasma antenna units, wherein the plurality of magnetically controlled plasma antenna units can be arranged into a circular array, a linear array, a rectangular array or a semi-circular array; the magnetically controlled plasma antenna units comprise dielectric tubes, inert gases, exciting feed loops, signal feed loops, an electromagnet and an earth plate; the same radio frequency exciting power is applied to the exciting feed loops of all the magnetically controlled plasma antenna units to carry out single-ended excitation on the inert gases to generate plasma columns; communication signals with the same amplitude and phase are applied to the signal feed loops of all the magnetically controlled plasma antenna units; and a controller is adopted to adjust the magnetic field intensity of the electromagnet of each magnetically controlled plasma antenna unit and then control the radiance of each magnetically controlled plasma antenna unit, thus realizing dynamic control of the radiation beams of the whole antenna array.
Description
Technical field
The present invention relates to the antenna of wireless communication field, the plasma antenna array that especially a kind of magnetic control wave beam is variable.
Background technology
The modern communications antenna develops towards the smart antenna direction of frequency reconfigurable and directional diagram reconstructable.Smart antenna can dynamically be controlled radiation intensity at different directions, thus spread communication system capacity exponentially.Plasma antenna can be realized the control and the dynamic restructuring of antenna pattern, is a kind of intelligent antenna technology with good development prospect.Compare with traditional antenna, the plasma antenna using plasma substitutes common metal and conducts and radiated electromagnetic wave.Plasma antenna can launch or accept radio signal, and when not working, antenna presents the insulation dielectric characteristic when work, RCS is minimum.Plasma antenna has that light weight, volume are little, restructural, remarkable advantage that cost is low.
In commercialization, the communication equipment of using plasma antenna is the radiation characteristic of control antenna better.Because using plasma is as antenna material, parameters such as the density of plasma, collision frequency can dynamically be adjusted.Antenna impedance, bandwidth, directional diagram, radiant power are dynamically changed in relative broad range.Compare common phased array, the plasma antenna array just can carry out antenna pattern scanning at high speed without movable part.
Militarily, plasma antenna can improve the hidden performance of radar of military installations.Because using plasma conduct and electromagnetic radiation signal, so can in needs, just excite the generation plasma, emission military communication signal; All the other times are activated plasma not, and this moment, plasma was equivalent to general inert gas, can not absorb or the scatter radar signal, thereby realize radar invisible.
Compare with the individual plasma antenna, the controlled range of plasma antenna array is wideer, and performance is more superior.At present existing plasma antenna array technique generally adopts the radiance of the mode article on plasma body antenna array of phase shift battle array, adjusting RF excited power or the work of adjusting number of antennas dynamically to control.
Summary of the invention
The object of the present invention is to provide a kind of feeding classification simple, the plasma antenna array that the magnetic control wave beam of radiation characteristic Fast Adjustable is variable.
For realizing the object of the invention, the technical scheme that the present invention adopted is following:
The plasma antenna array that a kind of magnetic control wave beam is variable comprises a plurality of magnetic controlled plasma antenna elements; The magnetic controlled plasma antenna element comprises medium tube, inert gas, excitation electric feedback ring, signal feed ring, electromagnet and ground plate; Be packaged with inert gas in the medium tube; Excitation electric feedback ring and signal feed ring are metal rings, are looped around the outside of medium tube lower end, and the excitation electric feedback ring is arranged on the top of signal feed ring; Set gradually electromagnet and ground plate under the medium tube, electromagnet is arranged between medium tube and the ground plate; The excitation electric feedback ring of a plurality of magnetic controlled plasma antenna elements links to each other with the RF excited power supply through lead, and the RF excited power supply provides identical RF excited power for each magnetic controlled plasma antenna element; The signal feed ring of a plurality of magnetic controlled plasma antenna elements links to each other each magnetic controlled plasma antenna element of signal of communication constant amplitude feed-in in phase of signal feed port through lead with the signal feed port; The electromagnet of each magnetic control plasma antenna links to each other with controller through lead; Controller is used for regulating respectively the magnetic field intensity of the electromagnet of each magnetic controlled plasma antenna element; The physical characteristic of the plasma in the medium tube of the magnetic controlled plasma antenna element that change is corresponding, and then the radiance of control magnetic control plasma antenna unit; The variable plasma antenna array of magnetic control wave beam is regulated the electromagnet of each magnetic controlled plasma antenna element through controller magnetic field intensity; Adjust the radiance of each magnetic controlled plasma antenna element, realize the dynamic control of the radiation beam of entire antenna array.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, said ground plate is circular metal plate.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, medium tube is the column tube of hollow.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, the internal diameter of excitation electric feedback ring and signal feed ring is identical with the external diameter of medium tube.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, a plurality of magnetic controlled plasma antenna elements are arranged in circular array, linear array, rectangular array or semicircle array.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, the magnetic field intensity of the electromagnet of said magnetic controlled plasma antenna element is adjustable continuously.
In the variable plasma antenna array of above-mentioned magnetic control wave beam; The length of said medium tube is set to λ/4, λ=c/f wherein, and c is the light velocity in the vacuum; F is the operating frequency of the variable plasma antenna array of magnetic control wave beam, the i.e. operating frequency of signal of communication.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, be packaged with the mixture of inert gas and mercury vapour in the medium tube.
In the variable plasma antenna array of above-mentioned magnetic control wave beam, said inert gas is argon gas, neon, helium, krypton gas or xenon.
As the preferred version of the variable plasma antenna array of above-mentioned magnetic control wave beam, the material of said excitation electric feedback ring is the electric conductivity good metal; The sine wave signal of RF excited power supply output 10-30MHz; The length of medium tube is set to λ/4, λ=c/f wherein, and c is the light velocity in the vacuum, f is the operating frequency of the variable plasma antenna array of magnetic control wave beam, the i.e. operating frequency of signal of communication; Medium tube is processed by glass or heat resistant plastice, and thickness is 0.5mm-4mm; The radius of grounding plate and the length ratio of medium tube are less than 0.1; The signal feed ring is arranged on the 8mm-12mm on the medium tube bottom, and the excitation electric feedback ring is arranged on 3mm-6mm on the signal feed ring; The preferred argon gas of inert gas, neon, helium, krypton gas or xenon; The pressure of inert gas is 10mTorr-10Torr; Also can mix mercury vapour in the inert gas; The magnetic field intensity of electromagnet is adjustable continuously.
The high power RF signal in RF excited source encourages the inert gas in the medium tube through the excitation electric feedback ring, makes that the inert gas in the medium tube is ionized to the plasma ions scapus.Simultaneously, be added on the plasma column through the signal feed circulating application, with the form conduction of surface wave and radiate from the signal of communication of the constant amplitude homophase of signal feed port.A plurality of magnetic controlled plasma antenna elements are lined up to work simultaneously and are constituted the variable plasma antenna array of magnetic control wave beam.When the work of the variable plasma antenna array of magnetic control wave beam, it is in running order that all magnetic controlled plasma antenna elements receive identical RF excited simultaneously, and signal of communication of feed-in simultaneously all on each antenna element.When the magnetic field of the electromagnet of magnetic controlled plasma antenna element increased, the plasma in the medium tube received stronger the action of a magnetic field, and plasma has higher conductance, and radiance strengthens.Controller is regulated the magnetic field intensity of the electromagnet of each magnetic controlled plasma antenna element, makes part magnetic controlled plasma antenna element have the radiation stronger than other antenna elements, and then makes the antenna pattern of entire antenna array change.The magnetic field intensity of the electromagnet through regulating each magnetic controlled plasma antenna element; The antenna pattern of the variable plasma antenna array of magnetic control wave beam just can on certain orientation, produce stronger directional diagram directive property, so can carry out beam scanning on the plane that antenna element distributes.
A plurality of magnetic controlled plasma antenna elements can be arranged in circular array; Linear array, rectangular array or semicircle array, and pass through the radiation characteristic that controller is regulated each magnetic controlled plasma antenna element; Thereby obtain needed radiation lobe figure, antenna parameters such as directivity.
The present invention and existing plasma antenna compared with techniques; Existing plasma antenna array generally adopts the mode of phase shift battle array, adjusting RF excited power or the work of adjusting number of antennas to change the radiation characteristic of aerial array, and the cost of tunable radio frequency excitation power supply and phase shift battle array is expensive.The variable plasma antenna array of magnetic control wave beam passes through the magnetic field intensity of the electromagnet of each magnetic controlled plasma antenna element of adjusting; Can be neatly the conductivity and the radiation intensity of the plasma of each magnetic controlled plasma antenna element be dynamically adjusted; Therefore the controllability of its radiation characteristic is wideer, quicker, and cost is lower.Simultaneously; Each antenna element of the plasma antenna array that the magnetic control wave beam is variable is energized simultaneously and is plasma antenna; And signal of communication all constant amplitude in phase be fed on the antenna element; So each antenna element is worked simultaneously, can have higher radiation direction property coefficient like this.The directional diagram of the plasma antenna array that the magnetic control wave beam is variable can point to needed direction, and antenna pattern has controllability, can radiant power be concentrated on the direction that needs, so directivity factor is higher.
The present invention compares with the common metal aerial array; The feed of the plasma antenna array that the magnetic control wave beam is variable adopts constant amplitude homophase feeding classification, has removed complexity, unsteadiness and the cost high characteristic of metal antenna array to the phase-control circuit of the feed port of each antenna element like this from; In addition; The variable plasma antenna array of magnetic control wave beam passes through the magnetic field size of the electromagnet of change antenna element, and plasma conductivity changes thereupon, thereby influences the directional diagram directive property of aerial array; This is a kind of automatically controlled beam scanning, can realize the quick dynamic restructuring of directional diagram.
Description of drawings
Fig. 1 is the structural representation of the magnetic control plasma sub antenna unit of the variable plasma antenna array of magnetic control wave beam.
Fig. 2 be unit 8 the magnetic control wave beam can the schematic top plan view of plasma circular array.
Fig. 3 be Unit 4 the magnetic control wave beam can the schematic top plan view of plasma linear array.
Fig. 4 be Unit 6 the magnetic control wave beam can the schematic top plan view of plasma rectangle array.
Fig. 5 be Unit 5 the magnetic control wave beam can the schematic top plan view of plasma semicircle array.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation, but the scope that the present invention requires to protect is not limited to down the scope that example is explained.
The variable plasma antenna array of a kind of magnetic control wave beam has comprised a plurality of magnetic controlled plasma antenna elements 1, and a plurality of magnetic controlled plasma antenna elements 1 can be arranged in circular array, linear array, rectangular array or semicircle array.The quantity of magnetic controlled plasma antenna element 1 is generally 4 to 8.
As shown in Figure 1, magnetic controlled plasma antenna element 1 comprises medium tube 2, inert gas 3, excitation electric feedback ring 4, signal feed ring 5, electromagnet 6, ground plate 7; Medium tube 2 can be processed by glass or heat resistant plastice, and medium tube 2 is cylindrical tube of hollow, and the preferred 0.5mm-4mm of thickness has wherein encapsulated inert gas 3, and length is preferably λ/4, can make magnetic controlled plasma unit 1 have higher radiation intensity; Excitation electric feedback ring 4 is metal rings with signal feed ring 5, is looped around the outside of medium tube 2 lower ends, and its internal diameter is identical with the external diameter of medium tube 2; Excitation electric feedback ring 4 is arranged on the top of signal feed ring 5; Set gradually electromagnet 6 and ground plate 7 under the medium tube 2, electromagnet 6 is between medium tube 2 and ground plate 7; Ground plate 7 is circular metallic plates, and the length ratio of its radius and medium tube 2 is preferably less than 0.1; Signal feed ring 5 preferably is arranged on the 6mm-12mm on the electromagnet 6, and excitation electric feedback ring 4 preferably is arranged on 3mm-6mm on the signal feed ring 5.The excitation electric feedback ring 4 of a plurality of magnetic controlled plasma antenna elements 1 links to each other with RF excited power supply 10 through lead, and RF excited power supply 10 provides identical RF excited power for each magnetic controlled plasma antenna element 1; The signal feed ring 5 of a plurality of magnetic controlled plasma antenna elements 1 links to each other with signal feed port 9 through lead, is used for each magnetic controlled plasma antenna element 1 of signal of communication feed-in from signal feed port 9; Signal feed port 9 is used to connect signal transmitter or receiver; The electromagnet 6 of a plurality of magnetic controlled plasma antenna elements 1 links to each other with controller 8 through lead, and controller 8 changes the magnetic field intensity of electromagnet through the size of current of each electromagnet 6 of control.Controller 8 comprises single chip machine controlling circuit and the adjustable DC power supply of a plurality of output current; DC power supply and electromagnet 6 link to each other through lead, for electromagnet 6 provides direct current; When the electric current of DC power supply output increases, the magnetic field grow of electromagnet 6; When the electric current of DC power supply output reduced, the magnetic field of electromagnet 6 died down; The output current size of each DC power supply is regulated by single chip machine controlling circuit.
The material of excitation electric feedback ring 4 and signal feed ring 5 is the electric conductivity good metal.4 pairs of inert gases of excitation electric feedback ring 3 carry out single end driver to produce the plasma column that surface wave drives.The sine wave signal of RF excited power supply 10 exportable 10-30MHz.From the signal of communication of signal feed port 9 through signal feed ring 5 constant amplitudes in phase in each the magnetic controlled plasma antenna element 1 in the feed-in array.
The inert gas 3 of medium tube 2 inner fillings is energized electric feedback ring 4 and excites and become plasma column, becomes the electromagnetic wave conduction ature of coal of magnetic controlled plasma antenna element 1; The magnetic field intensity of the electromagnet 6 of each magnetic controlled plasma antenna element 1 is by controller 8 controls, and realization is to the independent control of the magnetization of the plasma of each plasma antenna unit 1; Through the conductance that the plasma in each magnetized plasma antenna element 1 is regulated in the magnetic field of control electromagnet 6, cause this magnetic controlled plasma antenna element 1 radiation or accept the variation of communication signal strength; Some magnetic controlled plasma antenna element radiation in the array are perhaps accepted communication signal strength and are increased, and can make the antenna pattern of entire antenna array have tangible directive property, thereby make the radiation beam of aerial array variable.
When the variable plasma antenna array of magnetic control wave beam was worked, each magnetic controlled plasma antenna element 1 all received the effect of RF excited power supply 10; When being used for radiation signal, the signal of communication of constant amplitude homophase through signal feed ring 5 and 1 coupling of magnetic controlled plasma antenna element, makes each magnetic controlled plasma antenna element 1 radiated communications signal simultaneously from signal feed port 9.When the variable plasma antenna array of magnetic control wave beam is not worked; RF excited power supply 10 is all closed with signal feed port 9; Plasma in the medium tube 2 is replied and is inert gas 3; Its RCS is minimum, thereby makes the variable plasma antenna array of magnetic control wave beam have the radar invisible performance.
The length of magnetic controlled plasma antenna element 1 is that λ/4 o'clock have radiance preferably in electrical length; The length of the medium tube 2 of magnetic controlled plasma antenna element 1 is set to λ/4; λ=c/f wherein; C is the light velocity in the vacuum, and f is the operating frequency of the variable plasma antenna array of magnetic control wave beam, the i.e. operating frequency of signal of communication.For the operating frequency of 250MHz, the length of medium tube 2 is 300mm, thereby makes the length of wherein being excited to generate plasma be about 300mm, and promptly corresponding electrical length is λ/4.The inert gas 3 that charges in the medium tube 2 can be selected argon gas, neon, helium, krypton gas or xenon, also can mix mercury vapour therein in addition.The air pressure pressure of inert gas 3 is 10mTorr-10Torr.
When the variable plasma antenna array of magnetic control wave beam is used for radiation; It is plasma that inert gas 3 in the All Media pipe 2 all is energized electric feedback ring 4 ionization, and signal of communication is input to signal feed ring 5 and feed-in plasma antenna unit 1 from signal input port 9.Magnetic field size through the electromagnet 6 on controller 8 each plasma antenna unit 1 of adjustment can make the conductivity of plasma wherein change; When the magnetic field of electromagnet 6 increased, the conductivity of the plasma in the medium tube 2 rose, and the radiation intensity of pairing magnetic controlled plasma antenna element 1 increases.The magnetic field intensity of the electromagnet 6 through the magnetic controlled plasma antenna element 1 on the diverse location in controller 8 array of controls; Can be so that the variable total antenna pattern of plasma antenna array of magnetic control wave beam have tangible directive property on certain orientation, thus can realize the dynamic control of the radiation beam of entire antenna array.
A plurality of magnetic controlled plasma antenna elements 1 can be arranged in circular array, linear array, and rectangular array or semicircle array as shown in Figure 2 constitute circular array by 8 magnetic controlled plasma antenna elements 1 are evenly distributed on an annulus; The magnetic control wave beam of Unit 4 as shown in Figure 3 can the plasma linear array; The magnetic control wave beam of Unit 6 shown in Figure 4 can plasma rectangle array; The magnetic control wave beam of Unit 5 shown in Figure 5 can plasma semicircle array; The variable plasma antenna array of the magnetic control wave beam of various spread patterns is regulated the radiation characteristic of each magnetic controlled plasma antenna element through controller, thereby obtains needed radiation lobe figure, antenna parameters such as directivity.
The above is merely preferred embodiments of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the plasma antenna array that the magnetic control wave beam is variable is characterized in that comprising a plurality of magnetic controlled plasma antenna elements; The magnetic controlled plasma antenna element comprises medium tube, inert gas, excitation electric feedback ring, signal feed ring, electromagnet and ground plate; Be packaged with inert gas in the medium tube; Excitation electric feedback ring and signal feed ring are metal rings, are looped around the outside of medium tube lower end, and the excitation electric feedback ring is arranged on the top of signal feed ring; Set gradually electromagnet and ground plate under the medium tube, electromagnet is arranged between medium tube and the ground plate; The excitation electric feedback ring of a plurality of magnetic controlled plasma antenna elements links to each other with the RF excited power supply through lead, and the RF excited power supply provides identical RF excited power for each magnetic controlled plasma antenna element; The signal feed ring of a plurality of magnetic controlled plasma antenna elements links to each other each magnetic controlled plasma antenna element of signal of communication constant amplitude feed-in in phase of signal feed port through lead with the signal feed port; The electromagnet of each magnetic control plasma antenna links to each other with controller through lead; Controller is used for regulating respectively the magnetic field intensity of the electromagnet of each magnetic controlled plasma antenna element, and then the radiance of control magnetic control plasma antenna unit, realizes the dynamic control to the radiation beam of entire antenna array.
2. the plasma antenna array that magnetic control wave beam according to claim 1 is variable is characterized in that ground plate is circular metal plate.
3. the plasma antenna array that magnetic control wave beam according to claim 1 is variable is characterized in that medium tube is the column tube of hollow.
4. the plasma antenna array that magnetic control wave beam according to claim 3 is variable is characterized in that encouraging the internal diameter of electric feedback ring and signal feed ring identical with the external diameter of medium tube.
5. the plasma antenna array that magnetic control wave beam according to claim 1 is variable is characterized in that a plurality of magnetic controlled plasma antenna elements are arranged in circular array, linear array, rectangular array or semicircle array.
6. the plasma antenna array that magnetic control wave beam according to claim 1 is variable is characterized in that: the magnetic field intensity of the electromagnet of said magnetic controlled plasma antenna element is adjustable continuously.
7. the plasma antenna array that magnetic control wave beam according to claim 1 is variable; It is characterized in that: the length of said medium tube is set to λ/4; λ=c/f wherein; C is the light velocity in the vacuum, and f is the operating frequency of the variable plasma antenna array of magnetic control wave beam, the i.e. operating frequency of signal of communication.
8. the plasma antenna array that magnetic control wave beam according to claim 1 is variable is characterized in that: the mixture that is packaged with inert gas and mercury vapour in the medium tube.
9. according to the variable plasma antenna array of each described magnetic control wave beam of claim 1～8, it is characterized in that: said inert gas is argon gas, neon, helium, krypton gas or xenon.
10. the plasma antenna array that magnetic control wave beam according to claim 9 is variable is characterized in that the RF excited power supply is output as the sine wave signal of 10-30MHz; Medium tube is processed by glass or heat resistant plastice, and thickness is 0.5mm-4mm; The radius of grounding plate and the length ratio of medium tube are less than 0.1; The signal feed ring is arranged on the 8mm-12mm place on the medium tube bottom, and the excitation electric feedback ring is arranged on 3mm-6mm on the signal feed ring; The pressure of inert gas is 10mTorr-10Torr.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107211251A (en) * | 2015-02-13 | 2017-09-26 | 欧姆龙株式会社 | Wireless communication control system, radio communication control apparatus, wireless communication control method, directional information generation method and radio machine |
| CN108649993A (en) * | 2018-04-11 | 2018-10-12 | 北京航天长征飞行器研究所 | Whether there is or not communication signal transmissions delay measurement systems when plasma for one kind |
| CN109301453A (en) * | 2018-09-20 | 2019-02-01 | 中国科学院国家空间科学中心 | A kind of plasma antenna impedance-matching device |
| CN110538334A (en) * | 2019-08-09 | 2019-12-06 | 西安交通大学 | Plasma sterilization and anti-infection device based on argon and ethanol mixed gas |
| CN110635249A (en) * | 2019-09-05 | 2019-12-31 | 南京邮电大学 | Broadband transfer wave absorber based on mercury expansion with heat and contraction with cold regulation |
| CN111952736A (en) * | 2020-07-30 | 2020-11-17 | 中国科学院国家空间科学中心 | Expandable controllable plasma excitation power source |
| CN113140910A (en) * | 2020-01-16 | 2021-07-20 | 东京毅力科创株式会社 | Array antenna and plasma processing apparatus |
| CN114447593A (en) * | 2021-12-29 | 2022-05-06 | 北京邮电大学 | Magnetic current controllable antenna array device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107211251A (en) * | 2015-02-13 | 2017-09-26 | 欧姆龙株式会社 | Wireless communication control system, radio communication control apparatus, wireless communication control method, directional information generation method and radio machine |
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| CN109301453A (en) * | 2018-09-20 | 2019-02-01 | 中国科学院国家空间科学中心 | A kind of plasma antenna impedance-matching device |
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| CN110538334A (en) * | 2019-08-09 | 2019-12-06 | 西安交通大学 | Plasma sterilization and anti-infection device based on argon and ethanol mixed gas |
| CN110635249A (en) * | 2019-09-05 | 2019-12-31 | 南京邮电大学 | Broadband transfer wave absorber based on mercury expansion with heat and contraction with cold regulation |
| CN110635249B (en) * | 2019-09-05 | 2021-03-16 | 南京邮电大学 | Broadband transfer wave absorber based on mercury expansion with heat and contraction with cold regulation |
| CN113140910A (en) * | 2020-01-16 | 2021-07-20 | 东京毅力科创株式会社 | Array antenna and plasma processing apparatus |
| CN113140910B (en) * | 2020-01-16 | 2024-04-12 | 东京毅力科创株式会社 | Array antenna and plasma processing apparatus |
| CN111952736A (en) * | 2020-07-30 | 2020-11-17 | 中国科学院国家空间科学中心 | Expandable controllable plasma excitation power source |
| CN114447593A (en) * | 2021-12-29 | 2022-05-06 | 北京邮电大学 | Magnetic current controllable antenna array device |
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Application publication date: 20120215 |