CN113067128B - Liquid corner reflector antenna with reconfigurable frequency and adjustable lobe width - Google Patents
Liquid corner reflector antenna with reconfigurable frequency and adjustable lobe width Download PDFInfo
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- CN113067128B CN113067128B CN202110305797.6A CN202110305797A CN113067128B CN 113067128 B CN113067128 B CN 113067128B CN 202110305797 A CN202110305797 A CN 202110305797A CN 113067128 B CN113067128 B CN 113067128B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The invention discloses a liquid corner reflector antenna with reconfigurable frequency and adjustable lobe width, which mainly solves the problems that the prior art can not reconfigure the resonant frequency of the antenna and can not adjust the horizontal lobe width of the antenna. The passive vibrator comprises a metal base plate, two passive vibrator arms fixed on the upper surface of the metal base plate and an active vibrator positioned in an included angle formed by the two passive vibrator arms; each passive oscillator arm consists of a plurality of collinear passive oscillators; the passive vibrators comprise hollow tubes and insulating devices, part of the hollow tubes are filled with conductive liquid, and the adjustment of the horizontal lobe width of the antenna is realized by adjusting the number of the vibrators filled with the conductive liquid on the two passive vibrator arms; the active vibrator comprises a liquid collecting hollow tube, an insulating device, conductive liquid and a feed device; the reconfigurable antenna resonant frequency is realized by adjusting the height of the conductive liquid in the active oscillator. Compared with the prior art, the invention widens the functions of the antenna and can be used for receiving and transmitting signals in a wireless communication system.
Description
Technical Field
The invention belongs to the technical field of microwave communication devices, and particularly relates to a liquid corner reflector antenna which can be used for receiving and transmitting signals in a wireless communication system.
Background
The corner reflector antenna is an antenna system formed by placing a plane or grid reflector behind a radiation unit, and the working principle of the corner reflector antenna is as follows: a reflector is arranged in one direction of the radiation unit, and the reflector can reflect the electromagnetic waves radiated to the direction by the radiation unit back, so that the antenna can perform directional radiation; the antenna system utilizes the structure of the reflector, improves the gain of the antenna, has larger front-to-back ratio of field intensity, and is widely applied to the aspects of television reception, communication, radar and the like. With the technological development and social progress, people have new requirements for a corner reflector antenna such as frequency reconstruction, directional diagram reconstruction, lobe width adjustment and the like, but the traditional corner reflector antenna cannot meet one or more requirements due to the limitation that the traditional corner reflector antenna adopts a solid metal structure.
In order to achieve the reconfigurable characteristic of the directional diagram, research and development personnel have made many attempts in different ways, for example, a patent with the publication number of CN110190377B, entitled 'a directional diagram reconfigurable liquid antenna', discloses a directional diagram reconfigurable liquid corner reflector antenna, which comprises a liquid monopole, a liquid reflecting surface, a grounding plate and a feeding structure, and the antenna utilizes the principle of the corner reflector to realize the reconfigurable effect of the directional diagram by selecting a specific position of the liquid reflecting surface and injecting a conductive liquid to form different liquid reflecting surfaces. The antenna can realize the effect of reconfigurable directional diagram by utilizing the liquidity and the liquidity of the conductive liquid, but the defects are that the frequency reconfiguration cannot be realized, and the lobe width cannot be adjusted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a liquid corner reflector antenna with reconfigurable frequency and adjustable lobe width, aiming at realizing the reconfiguration of antenna resonant frequency and the adjustment of horizontal lobe width of the antenna.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a frequency is restructural and lobe width adjustable liquid corner shape reflector antenna, includes metal bottom plate, two passive oscillator arms and active oscillator, and every passive oscillator arm comprises a plurality of collinear passive oscillators, and the bottom of active oscillator is equipped with feed arrangement, and these oscillators are fixed at metal bottom plate upper surface, and the splendid attire has conducting liquid, its characterized in that in the oscillator:
the two passive oscillator arms are respectively fixed on two edges of the metal bottom plate, are in mirror symmetry about an angular bisector of an included angle formed by the two passive oscillator arms, and are equal in distance between adjacent passive oscillators; the passive vibrators in each passive vibrator arm are partially filled with conductive liquid, at least three passive vibrators filled with the conductive liquid are arranged adjacently or at intervals, the passive vibrators filled with the conductive liquid on the two passive vibrator arms are symmetrically arranged, and the width of a horizontal lobe of the antenna is adjusted by adjusting the number of the passive vibrators filled with the conductive liquid on the two passive vibrator arms;
the active oscillator is positioned on an angle dividing line of an included angle formed by the two passive oscillator arms and smaller than a flat angle, and the reconfiguration of the antenna resonant frequency is realized by adjusting the height of the conductive liquid in the active oscillator.
Further, each passive oscillator comprises a hollow tube and a first insulating device, wherein the hollow tube is perpendicular to the metal floor, and the first insulating device is sealed at the bottom of the hollow tube.
Furthermore, the active vibrator comprises a liquid collecting hollow tube and a second insulating device, the liquid collecting hollow tube is perpendicular to the metal floor, and the second insulating device is sealed at the bottom of the liquid collecting hollow tube and is embedded with the feed device.
Furthermore, the heights of the insulating device in the passive oscillator and the insulating device in the active oscillator can be adjusted, and the impedance of the antenna is changed by adjusting the heights of the two insulating devices, so that the matching between the antenna and the impedance of the feeder line is realized.
Furthermore, the feeding device comprises a feeding bottom plate, a connector and a feeding probe, wherein the feeding bottom plate is fixed on the upper surface of the second insulating device, the connector is positioned on the lower surface of the metal bottom plate, the feeding probe is insulated from the metal bottom plate, one end of the feeding probe is connected with the feeding bottom plate, and the other end of the feeding probe penetrates through the metal bottom plate and is connected with the connector. The connection point of the feed probe and the feed baseplate is positioned in the center of the feed baseplate.
Furthermore, the height of the conductive liquid in the active oscillator is adjusted to realize the reconstruction of the resonant frequency of the antenna, and the height of the conductive liquid corresponding to the resonant frequency of the antenna is set in the liquid collecting hollow tube according to the radius of the liquid collecting hollow tube, the relative dielectric constant and the conductivity of the conductive liquid.
Compared with the prior art, the invention has the following advantages:
1. the antenna utilizes the principle that the physical length of the antenna oscillator influences the resonant frequency of the antenna, and the height of the conductive liquid contained in the liquid collecting hollow tube of the active oscillator realizes the characteristic of reconfigurable antenna frequency.
2. The invention utilizes the principle that the passive vibrators of the corner reflector antenna can influence the directional diagram of the antenna, and controls the influence of the number of the passive vibrators on the directional diagram of the antenna by controlling the existence of the conductive liquid contained in the partial liquid collecting hollow tubes in the two passive vibrator arms, thereby realizing the effect of adjusting the width of the antenna lobe.
3. The invention can make the feed bottom plate and the metal bottom plate form a capacitor similar to a loading medium in the active oscillator, and make the conductive liquid and the metal bottom plate form a capacitor similar to the loading medium in the passive oscillator, and realize the adjustment of the impedance of the two capacitors by adjusting the heights of the passive oscillator insulating device and the active oscillator insulating device, thereby achieving the purposes of changing the impedance of the antenna and matching the impedance of the antenna and the feed line without designing a matching network, and simplifying the complexity of the antenna structure.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a power feeding device according to the present invention;
FIG. 3 is the S corresponding to the active vibrator liquid collecting hollow tube in different conductive liquid heights11A graph;
FIG. 4 is a graph of the gain of the H-plane corresponding to 190 MHz for different numbers of passive vibrators in the invention;
FIG. 5 is a graph of the difference in height S between the first and second insulating units in the present invention11Graph is shown.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and specific examples.
Referring to fig. 1, the present example includes a metal base plate 1, an active oscillator 2 and two passive oscillator arms, each passive oscillator arm is composed of N passive oscillators 3, N is set to be equal to or greater than 3 in the present example, the passive oscillators 3 are respectively fixed on two edges of the metal base plate 1, and are in mirror symmetry with respect to an angle bisector of an included angle formed by the two passive oscillator arms, and distances between adjacent passive oscillators 3 are equal; the active oscillator 2 is positioned on an angle bisector of an included angle formed by the two passive oscillator arms.
Each passive oscillator 3 comprises a hollow tube 31 and a first insulating device 32, the hollow tube 31 is perpendicular to the metal base plate 1, the first insulating device 32 is sealed at the bottom of the hollow tube 31, conductive liquid is contained in part of the hollow tubes 31, at least three hollow tubes 31 are selected to contain the conductive liquid according to the adjacent or interval on each passive oscillator arm, the passive oscillators containing the conductive liquid are symmetrically arranged on the two passive oscillator arms, and the width of a horizontal lobe of the antenna is uniformly adjusted by adjusting the number of the passive oscillators containing the conductive liquid on the two passive oscillator arms.
The active vibrator 2 comprises a liquid collecting hollow tube 21, a second insulating device 22 and conductive liquid, wherein the liquid collecting hollow tube 21 is perpendicular to the metal bottom plate 1, the second insulating device 22 is sealed at the bottom of the liquid collecting hollow tube 21 and is embedded with the feed device 4, and the conductive liquid is contained in the liquid collecting hollow tube 21. The height of the conductive liquid corresponding to the antenna resonant frequency is set in the hollow liquid collecting tube 21 according to the radius of the hollow liquid collecting tube 21, the relative dielectric constant and the conductivity of the conductive liquid, so that the antenna resonant frequency can be reconstructed.
The heights of the insulating device 32 in the passive oscillator 3 and the insulating device 22 in the active oscillator 2 can be adjusted, and the impedance of the antenna can be changed by adjusting the heights of the two insulating devices, so that the matching between the antenna and the impedance of the feeder line is realized.
The conductive liquid in the passive vibrator 3 and the active vibrator 2 adopts liquid metal or seawater or sodium chloride solution, and the seawater with the relative dielectric constant of 81 is adopted in the embodiment without limitation, and the conductivity of the seawater is 4 siemens/meter.
The feeding device 4 comprises a feeding bottom plate 41, a connector 42 and a feeding probe 43, the feeding bottom plate 41 is fixed on the upper surface of the second insulating device 22, the connector 42 is positioned on the lower surface of the metal bottom plate 1, the feeding probe 43 is insulated from the metal bottom plate 1, one end of the feeding probe is connected with the feeding bottom plate 41, and the other end of the feeding probe penetrates through the metal bottom plate 1 and is connected with the connector 42. The connection point of the feeding probe 43 to the feeding substrate 41 is located at the center of the feeding substrate 41.
The metal base plate 1 is used as the ground of an antenna, the metal base plate 1 in the embodiment is made of a square plate made of an iron material, the side length of the metal base plate is 2000mm, the thickness of the metal base plate is 2mm, a round hole is formed in the metal base plate 1, the center of the hole is located on a diagonal line of the metal base plate, the length of the hole from two sides of the metal base plate 1 is 600mm, the diameter of the hole is 8mm, the hole is used for enabling a feed probe 43 to penetrate through the hole, and therefore the connection with the connector 42 is facilitated, and the feed probe 43 is prevented from being short-circuited with the metal base plate 1.
The hollow tubes 31 are equidistantly fixed on two sides of the metal bottom plate 1, and are arranged symmetrically about the angle bisector of the included angle formed by the two passive oscillator arms, so that the antenna lobe is symmetrical about the angle bisector of the included angle formed by the two passive oscillator arms, and the width of the lobe can be uniformly adjusted; the hollow tube 31 is made of, but not limited to, PVC material with a relative dielectric constant of about 4, and is circular in shape, the inner diameter of the hollow tube is 50mm, the height of the hollow tube is 1100mm, the thickness of the hollow tube is 2mm, the height of the contained conductive liquid is 600mm, the number of the hollow tubes 31 is nine in this example, and one hollow tube is selected to be placed at the intersection point of two passive vibrator arms, the hollow tube at the intersection point is located at the nearest corner to the round hole on the metal base plate 1, the distance from the center of the hollow tube to two edges of the metal base plate 1 is 77mm, the remaining eight hollow tubes 31 are regularly distributed on the two passive vibrator arms in a symmetrical manner, the included angle between the two passive vibrator arms is 90 degrees, and the distance between the centers of the adjacent hollow tubes 31 is 350 mm. First insulating means 32 are provided in the hollow tube 31 for preventing the conductive liquid contained therein from short-circuiting with the metal base plate 1. The first insulating means 32 of this example is made of, but not limited to, teflon having a relative dielectric constant of about 2.1, and is shaped like a cylinder with a height of 10mm and a diameter of 50 mm; each first insulating means is fixed to the bottom of the hollow tube 31 with its lower surface in contact with the upper surface of the metal base plate 1.
The liquid collecting hollow tube 21 is fixed on an angle division line of an included angle formed by the two passive vibrator arms, so that an antenna lobe is symmetrical about the angle division line of the included angle formed by the two passive vibrator arms; the liquid collection hollow tube 21 is made of but not limited to PVC material with relative dielectric constant of about 4, is circular in shape, has the inner diameter of 50mm, the height of 1100mm and the thickness of 2mm, and contains conductive liquid with the height of 300 mm; the hollow liquid collecting pipe 21 is vertically fixed on the metal bottom plate 1, and the center of the hollow liquid collecting pipe coincides with the center of the hole on the metal bottom plate 1. The second insulating device 22 in the hollow tube 21 is used to prevent the conductive liquid in the hollow tube 21 from short-circuiting with the metal bottom plate 1. The example is made of but not limited to Teflon material with relative dielectric constant of about 2.1, and is cylindrical in shape, 10mm in height and 50mm in diameter; a circular hole is drilled at the center of the second insulating device 22, the diameter of the circular hole is equal to the diameter of the feed probe 43, the size of the circular hole is 4mm, and the circular hole is used for allowing the feed probe 43 to pass through the circular hole, so that the circular hole is convenient to connect with the feed bottom plate 41. The second insulating device 22 is fixed at the bottom of the liquid collecting hollow tube 21, the center of a circular hole on the second insulating device 22 is superposed with the center of a hole on the metal bottom plate 1, and the lower surface of the second insulating device 22 is contacted with the upper surface of the metal bottom plate 1;
referring to fig. 2, the feeding device 4 is used for feeding the conductive liquid to the hollow liquid collecting tube 21 of the active oscillator. The feeding bottom plate 41 in the device is used for feeding power by directly contacting with the conductive liquid in the liquid collecting hollow tube 21, is made of copper, is not limited to be circular, and has the thickness D of 2mm and the diameter R1Is 50 mm; the connector in the device adopts an N-type connector; the feed probe 43 in the device, which is made of copper but not limited thereto, has the function of transmitting a feed signal fed from the connector 42 to the feed substrate 41, is cylindrical in shape, and has a length H1Is 12mm, diameter R2Is 4 mm.
The working principle of the invention is as follows: the connector 42 transmits a feeding signal to the feeding bottom plate 41 through the feeding probe 43, so that the conductive liquid in the liquid collecting hollow tube 21 of the active oscillator is electrified, and the active oscillator becomes a radiating body; the energy radiated by the charged conductive liquid in the liquid collecting hollow tube 21 is coupled to the conductive liquid in the hollow tube 31 of the passive oscillator, so that the conductive liquid is charged and the passive oscillator becomes a radiator; then, the physical height of the active oscillator is controlled by adjusting the height of the conductive liquid contained in the liquid collecting hollow tube 21, so that the resonant frequency of the antenna is influenced, and the reconfiguration of the resonant frequency of the antenna is realized; the quantity of the passive vibrators 3 is controlled by controlling the existence of the conducting liquid in the hollow tubes 31 of the two passive vibrator arm parts, so that the directional diagram of the antenna is influenced, and the adjustment of the horizontal lobe width of the antenna is realized.
Several simulation examples of the adjustment of the horizontal lobe width of the antenna of the present invention and the reconfigurability of the resonant frequency of the antenna are given below to further illustrate the advantages of the present invention.
Simulation example 1, reconfiguration of antenna resonant frequency:
in this example, commercial HFSS software is used for simulation, assuming that the heights of the first insulating device 32 and the second insulating device 22 are both 30mm, the 9 hollow tubes of the two passive oscillator arms are filled with conductive liquid, and the resonant frequencies of the antenna are simulated under four conditions that the heights of the conductive liquid in the liquid collecting hollow tube 21 are 250mm, 280mm, 310mm and 340mm, respectively, and the result is shown in fig. 3, wherein the ordinate represents the return loss S of the antenna11The abscissa represents frequency in MHz.
As can be seen from fig. 3, when the height of the conductive liquid in the hollow liquid collecting tube 21 of the active oscillator is 250mm, the corresponding antenna resonant frequency is 208 MHz; when the height of the conductive liquid is 280mm, the corresponding antenna resonant frequency is 195 MHz; when the height of the conductive liquid is 310mm, the corresponding antenna resonant frequency is 184 MHz; when the height of the conductive liquid is 340mm, the corresponding resonant frequency of the antenna is 175 MHz. The result shows that the heights of different conductive liquids in the liquid collecting hollow tube 21 correspond to different resonant frequencies of the antenna, and the antenna frequency can be reconfigured by adjusting the height of the conductive liquid of the active oscillator 2.
Example 2 simulation, adjustment of horizontal lobe width.
The simulation is carried out by commercial software HFSS, the resonant frequency of the antenna is 190 MHz, the heights of the first insulating device 32 and the second insulating device 22 are 30mm, three passive vibrators containing conductive liquid, 5 passive vibrators containing conductive liquid, 7 passive vibrators containing conductive liquid and 9 passive vibrators containing conductive liquid are respectively arranged, and H-plane gain of the antenna is simulated under the four conditions, wherein the three passive vibrators containing conductive liquid are arranged at the intersection point of two passive vibrator arms and the adjacent position of the two passive vibrator arms; five passive vibrators for containing conductive liquid are arranged at the intersection point of the two passive vibrator arms and 4 adjacent positions of the two passive vibrator arms; the rest two conditions are analogized in turn, and the simulation result is shown in fig. 4, wherein the ordinate represents the H-plane gain of the antenna, and the unit is dBi.
In fig. 4, curve a shows the H-plane gain results for an antenna with three passive elements containing conductive liquid, where the 3dB lobe width of the antenna gain is about 201 degrees; curve B represents the H-plane gain results for the antenna when five passive elements containing conductive liquid are provided, with the 3dB lobe width of the antenna gain being about 94 degrees; curve C represents the H-plane gain results for the antenna when seven passive elements containing conductive liquid are provided, with the 3dB lobe width of the antenna gain being about 61 degrees; curve D shows the H-plane gain results for the antenna when nine passive elements containing conductive liquid are provided, where the 3dB lobe width of the antenna gain is about 52 degrees; from these four results, it can be seen that the lobe width can be adjusted by adjusting the number of the passive vibrators 2 having the conductive liquid mounted on the two passive vibrator arms.
Simulation example 3, verification of antenna impedance matching.
The present example was simulated by using commercial HFSS software, and assuming that the heights of the first and second insulating devices 32 and 22 were equal throughout the simulation process of the present example, the 9 hollow tubes of the two passive dipole arms were filled with conductive liquid, and the heights of the first and second insulating devices 32 and 22 were set to 15mm, 20mm, 25mm, and 30mm, respectively, the resonant frequencies of the simulated antennas in these four cases were as shown in fig. 5, wherein the ordinate represents the return loss S of the antenna11The abscissa represents frequency in MHz.
As can be seen from fig. 5, the impedance bandwidth of the antenna is about 164MHz to 219MHz, and the return loss of the antenna gradually decreases as the heights of the first insulating device 32 and the second insulating device 22 become larger. This result shows that the impedance matching of the antenna is achieved by adjusting the heights of the first and second insulating means 32 and 22.
The above description is only a preferred embodiment of the present invention, but not limited to the above embodiments, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention.
Claims (3)
1. The utility model provides a frequency is restructural and lobe width adjustable liquid corner shape reflector antenna, includes metal bottom plate (1), two passive oscillator arms and active oscillator (2), and every passive oscillator arm comprises a plurality of collinear passive oscillator (3), and the bottom of active oscillator is equipped with feed arrangement (4), and these oscillators are fixed at metal bottom plate (1) upper surface, its characterized in that:
the two passive vibrator arms are respectively fixed on two edges of the metal bottom plate (1), are in mirror symmetry about an angular bisector of an included angle formed by the two passive vibrator arms, and are equal in distance between adjacent passive vibrators; the passive vibrators (3) in each passive vibrator arm are partially filled with conductive liquid, at least three passive vibrators filled with the conductive liquid are arranged adjacently or at intervals, the passive vibrators filled with the conductive liquid on the two passive vibrator arms are symmetrically arranged, and the width of a horizontal lobe of the antenna is adjusted by adjusting the number of the passive vibrators filled with the conductive liquid on the two passive vibrator arms;
the active oscillator (2) is positioned on an angle division line of an included angle which is formed by the two passive oscillator arms and is smaller than a flat angle, conductive liquid is contained in the active oscillator, and the reconfiguration of the antenna resonant frequency is realized by adjusting the height of the conductive liquid in the active oscillator;
each passive oscillator (3) comprises a hollow tube (31) and a first insulating device (32), the hollow tube (31) is perpendicular to the metal bottom plate (1), and the first insulating device (32) is sealed at the bottom of the hollow tube (31); part of the hollow tube (31) is filled with conductive liquid;
the active vibrator (2) comprises a liquid collecting hollow tube (21) and a second insulating device (22), the liquid collecting hollow tube (21) is vertical to the metal bottom plate (1), and the second insulating device (22) is sealed at the bottom of the liquid collecting hollow tube (21) and is embedded with the feed device; the conductive liquid is contained in the liquid collection hollow tube (21);
the height of the conductive liquid corresponding to the antenna resonant frequency is set in the liquid collection hollow tube (21), the antenna resonant frequency can be reconstructed, the heights of the first insulating device (32) in the passive oscillator (3) and the second insulating device (22) in the active oscillator (2) can be adjusted, and the impedance of the antenna can be changed by adjusting the heights of the two insulating devices, so that the impedance of the antenna can be matched with the impedance of the feeder line.
2. The antenna according to claim 1, wherein the feeding means (4) comprises a feeding substrate (41), a connector (42), and a feeding probe (43), the feeding substrate (41) is fixed on the upper surface of the second insulating means (22), the connector (42) is located on the lower surface of the metal substrate (1), the feeding probe (43) is insulated from the metal substrate (1), one end of the feeding probe is connected with the feeding substrate (41), and the other end of the feeding probe penetrates through the metal substrate (1) and is connected with the connector (42); the connection point of the feeding probe (43) and the feeding bottom plate (41) is positioned at the center of the feeding bottom plate (41).
3. The antenna according to claim 1, wherein the height of the conductive liquid in the active element is adjusted to reconstruct the resonant frequency of the antenna, and the height of the conductive liquid corresponding to the resonant frequency of the antenna is set in the hollow liquid-collecting tube (21) in accordance with the radius of the hollow liquid-collecting tube (21), the relative dielectric constant and conductivity of the conductive liquid.
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| CN202110305797.6A CN113067128B (en) | 2021-03-19 | 2021-03-19 | Liquid corner reflector antenna with reconfigurable frequency and adjustable lobe width |
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| CN101872894A (en) * | 2010-04-01 | 2010-10-27 | 电子科技大学 | Medium resonator antenna with reconfigurable directional diagram and phased array thereof |
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| US10553962B2 (en) * | 2014-12-09 | 2020-02-04 | Communication Components Antenna Inc. | Dipole antenna with beamforming ring |
| CN109193145A (en) * | 2018-09-11 | 2019-01-11 | 哈尔滨工业大学 | A kind of light-operated directional diagram reconstructable yagi aerial of printed form working in UHF waveband |
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| CN110190377A (en) * | 2019-04-15 | 2019-08-30 | 南京航空航天大学 | A kind of directional diagram reconstructable liquid antenna |
| CN110994149A (en) * | 2019-12-06 | 2020-04-10 | 西安电子科技大学 | Conductive liquid antenna |
| CN110994153A (en) * | 2019-12-17 | 2020-04-10 | 西安电子科技大学 | Broadband liquid antenna |
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| "An Azimuth-Pattern Reconfigurable Antenna";JIA-JUN LIANG;《IEEE Acess》;20180712;全文 * |
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