CN116960609A - Frequency and polarization reconfigurable micro-fluidic antenna - Google Patents
Frequency and polarization reconfigurable micro-fluidic antenna Download PDFInfo
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- CN116960609A CN116960609A CN202310769055.8A CN202310769055A CN116960609A CN 116960609 A CN116960609 A CN 116960609A CN 202310769055 A CN202310769055 A CN 202310769055A CN 116960609 A CN116960609 A CN 116960609A
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- 230000010287 polarization Effects 0.000 title claims abstract description 53
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 55
- 230000005855 radiation Effects 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 210000001787 dendrite Anatomy 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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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
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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
- 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
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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
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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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a frequency and polarization reconfigurable microfluidic antenna, which comprises a liquid metal position, a liquid metal position and a liquid metal position, wherein liquid metal EGaIn, a medium substrate, a metal patch, a microfluidic driving device, a wire, an upper electrode, a lower electrode, an elastic film, an insulating ring, an air cavity, an air vent and a micro-channel, wherein the metal patch is arranged on the upper layer of the medium substrate and comprises a main radiation patch and a branch patch which are connected with a microstrip feeder, and the liquid metal is controlled to move by a microfluidic driving technology to connect or disconnect different radiation branches so as to realize frequency and polarization reconfiguration. The invention realizes frequency and polarization characteristics by utilizing coplanar waveguide feed and microstrip line transmission, combines the advantages of low microstrip line loss and wider waveguide feed bandwidth, has small axial ratio, covers 5G sub-6-GHz wave band and ITU wave band in a large range, and has the advantages of small size, thinness, convenient operation, high power input support, low noise and long service life.
Description
Technical Field
The invention relates to a frequency and polarization reconfigurable microfluidic antenna, and belongs to the technical field of communication.
Background
Currently, the rapid development of emerging application technologies such as wireless communication and internet of things has led to a great demand for compact wireless communication systems that meet demanding multiband applications, with wideband frequency reconfigurable antennas being an important device to achieve this goal. Operating in complex and diverse environments, polarization is a key factor in determining the acquisition power level of a receiving antenna. In a wireless communication system in which users carry randomly oriented devices, if both the transmit and receive antennas are single polarized, polarization mismatch can easily occur, resulting in reduced power efficiency. In the worst case, if the transmitting antenna and the receiving antenna are Linear Polarizations (LP) in orthogonal directions or Circular Polarizations (CP) in opposite directions of rotation, the polarization states may be completely mismatched. Multi-polarization reconfigurable antennas can solve the problem of polarization mismatch in such wireless communications. In recent years, with the development of wireless communication, the 5G sub-6-GHz band (4.4 GHz-5 GHz) and the ITU band (7.7 GHz-8.1 GHz) have broad development prospects. In the feeding mode, the coplanar waveguide technology (CPW) feeding has the characteristics of small volume, wide frequency band, single metal layer, so that the CPW feeding is convenient for obtaining the performances of linear polarization, circular polarization, multi-frequency band operation and the like; the planar antenna fed by the coplanar waveguide technology (CPW) has the advantages of low radiation loss, small dispersion, easiness in integrating semiconductor devices, easiness in assembling with an edge feed connector and the like, and becomes an important research hot spot for antenna design in recent years.
The reconfigurability of the antenna is typically accomplished using semiconductor devices such as inverters, diodes or transistors, but may introduce distortion in the transmit path or reduce the noise ratio in the receive path of the wireless link, especially in the high frequency range, and are not suitable for high power operation. Microelectromechanical Systems (MEMS) are also commonly used for reconfigurable antennas, but with high operating voltages and lower average failure times than semiconductor devices.
Disclosure of Invention
The invention aims at overcoming the defects and shortcomings of the prior art, and provides a frequency and polarization reconfigurable micro-fluidic antenna, which increases bandwidth through microstrip transmission on the surface and coplanar waveguide effect of a metal radiation patch, moves metal liquid drops to connect or disconnect different metal branches through a micro-fluidic driving technology, realizes the frequency band and polarization reconfiguration of the antenna by utilizing high conductivity and fluidity of liquid metal and the micro-fluidic driving technology, supports high-power input, has low noise and longer service life than an MEMS antenna, and is small and thin, simple in structure and convenient to operate.
The technical scheme adopted for solving the technical problems is as follows: the frequency and polarization reconfigurable microfluidic antenna comprises a liquid metal position 1, a liquid metal position 2, a liquid metal position 3, a liquid metal EGaIn4, a dielectric substrate 5, a metal patch 6, a microfluidic driving device 7, a conducting wire 8, an upper electrode 9, a lower electrode 10, an elastic film 11, an insulating ring 12, an air cavity 13, an air vent 14 and a micro-channel 15. The metal patch 6 is on the upper layer of the dielectric substrate 5. The metal patch 6 comprises a main radiation patch connected with the microstrip feeder and a branch patch for controlling frequency and polarization reconstruction, and is used for controlling the movement of liquid metal through microfluidic driving and connecting or disconnecting different radiation branches. The microfluidic driving device 7 comprises a lead 8, an upper electrode 9, a lower electrode 10, an elastic film 11, an insulating ring 12, an air cavity 13, an air vent 14 and a micro-channel 15; the size of the upper electrode 9 is larger than that of the lower electrode 10, an insulating ring 12 is arranged around the lower electrode 10, and the thickness of the insulating ring 12 is slightly larger than that of the lower electrode 10; the upper electrode 9 is adhered to the upper surface of the elastic film 11; the upper electrode 9 and the lower electrode 10 are both metal foils and are respectively connected with a wire 8; the cross section of the micro-flow channel 15 is rectangular, nitrogen and liquid metal EGaIn4 are sealed in the micro-flow channel, the liquid metal EGaIn4 is positioned between the nitrogen, one end of the micro-flow channel 15 is communicated with the air cavity 13 of the micro-flow control driving device 7 through the vent hole 14, and the other end of the micro-flow channel is sealed.
Furthermore, the microfluidic antenna of the invention consists of liquid metal EGaIn4, a dielectric substrate 5, a metal patch 6 and a microfluidic driving device 7. The metal patches positioned on the surface layer comprise main radiation patches and branches, and the specific branches are connected or disconnected by driving the liquid metal EGaIn4 to change positions through a micro-fluidic driving device 7. Three flow channels with a length of 1mm, a width of 4mm and a depth of 0.1mm, a length of 1mm, a width of 4.5mm, a depth of 0.1mm and a length of 1mm, a width of 4mm and a depth of 0.1mm are respectively formed on the medium substrate 5. The microfluidic driving device 7 comprises a wire 8, an upper electrode 9, a lower electrode 10, an elastic film 11, an insulating ring 12, an air cavity 13, an air vent 14 and a micro-channel 15.
Furthermore, the main radiation patch is formed by 8 rectangular geometric splices, and the dimensions of the main radiation patch are respectively 5.8mm long and 3.2mm wide; a length of 5.2mm and a width of 1.5mm; 1.5mm long and 1.7mm wide; 3mm long and 2mm wide; 3mm long and 6.5mm wide; 24mm long and 2mm wide; 21mm long and 1.5mm wide; 2mm long and 14mm wide. The metal radiation branches comprise an upper end branch, a middle end branch and a lower end branch. The invention comprises an upper branch patch, a middle branch patch and a lower branch patch. The upper branch joint patch is L-shaped and consists of a rectangular metal foil with the length of 2mm, the width of 1.5mm, the length of 15mm and the width of 1.5mm; the middle-end branch patch consists of a rectangular metal foil with the length of 3.7mm and the width of 1.5 mm. The lower branch patch of the invention is L-shaped and consists of rectangular metal foil pieces with the length of 1.5mm, the width of 2.8mm, the length of 3.5mm and the width of 1.5 mm.
Furthermore, the micro-fluidic driving device 7 can drive the liquid metal EGaIn4 to change the position by applying voltage, so that different metal branches are connected or disconnected, and the dynamic regulation and control of the working frequency band and polarization are realized. The frequency band and polarization have four reconfigurable states, specifically including:
state 1: the position 1 is provided with liquid metal, so that metal branches at corresponding positions are connected; position 2 is free of liquid metal, and the corresponding metal branch is disconnected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (a). At this time, the antenna is linearly polarized and works in the 4.4-5 GHz band.
State 2: the position 1 is provided with liquid metal, so that metal branches at corresponding positions are connected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (b). At this time, the antenna is circularly polarized and works in the 4.4-5 GHz band.
State 3: position 1 has no liquid metal, and the corresponding metal branch is disconnected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (c). At this time, the antenna is linearly polarized and works in the 7.7-8.5 GHz band.
State 4: position 1 has no liquid metal, and the corresponding metal branch is disconnected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; the location 3 has liquid metal, which connects the metal branches of the corresponding location, as shown in fig. 9 (d). At this time, the antenna is circularly polarized and works in the 7.7-8.5 GHz band.
Further, the dielectric substrate 5 of the invention is a polytetrafluoroethylene glass cloth copper-clad laminate F with a dielectric constant of 2.2 and a tangent loss angle of 0.0007 4 BM220。
Further, the dielectric substrate 5 of the present invention is a cuboid with a length of 28mm, a width of 22mm, and a thickness of 1.5 mm.
Further, the invention has the beneficial effects that:
1. the invention realizes the frequency characteristic and polarization characteristic of the antenna by utilizing coplanar waveguide feed and microstrip line transmission, well combines the two advantages of low microstrip line loss and wider waveguide feed bandwidth, has small axial ratio and covers 5G sub-6-GHz wave band and ITU wave band in a large range.
2. According to the invention, the micro-flow control is combined, the liquid metal is controlled to move through a micro-flow control driving technology, and different radiation branches are connected or disconnected, so that the frequency reconstruction or polarization reconstruction of the antenna is realized.
3. The invention has the advantages of light weight, small size, simple structure, convenient operation, high power input support, low noise, long service life, wide bandwidth, small axial ratio and excellent polarization performance.
Drawings
Fig. 1 is a schematic diagram of a part of the structure of a dielectric substrate of a frequency and polarization reconfigurable microfluidic antenna.
Identification description: 1-liquid metal position, 2-liquid metal position, 3-liquid metal position, 4-liquid metal EGaIn, 5-medium substrate, 6-metal patch and 7-microfluidic driving device.
Fig. 2 is a front view of a portion of a frequency and polarization reconfigurable microfluidic antenna dielectric substrate.
Fig. 3 shows a frequency and polarization reconfigurable microfluidic antenna upper end branch patch.
Fig. 4 is a diagram of a center-end stub patch of a frequency and polarization reconfigurable microfluidic antenna.
Fig. 5 shows a frequency and polarization reconfigurable microfluidic antenna lower end stub patch.
Fig. 6 is a perspective view of a microfluidic driving device of a frequency and polarization reconfigurable microfluidic antenna.
Identification description: 15-micro flow channel.
Fig. 7 is a cross-sectional view of a microfluidic drive device of a frequency and polarization reconfigurable microfluidic antenna.
Identification description: 8-wires, 9-upper electrodes, 10-lower electrodes, 11-elastic films, 12-insulating rings, 13-air cavities and 14-vent holes.
Fig. 8 is a cross-sectional view of a microfluidic drive device of a frequency and polarization reconfigurable microfluidic antenna when a voltage is applied.
Fig. 9 is a schematic diagram of four states of a frequency and polarization reconfigurable microfluidic antenna.
Fig. 9 (a), 9 (b), 9 (c) and 9 (d) are schematic diagrams of four states of the microfluidic antenna.
Fig. 10 is a graph of return loss for frequency and polarization reconfigurable microfluidic antennas operating in state one and state two.
Fig. 11 is a graph of return loss for frequency and polarization reconfigurable microfluidic antennas operating in states three and four.
Fig. 12 is a graph of the axial ratio of a frequency versus polarization reconfigurable microfluidic antenna in state two operation.
Fig. 13 is a graph of the axial ratio of a frequency versus polarization reconfigurable microfluidic antenna state four operating.
Fig. 14 is a radiation pattern on the XOZ plane when the frequency and polarization reconfigurable microfluidic antenna states one and two are in operation.
Fig. 15 is a radiation pattern on the YOZ plane when the frequency and polarization reconfigurable microfluidic antenna states one and two are in operation.
Fig. 16 is a radiation pattern on the XOZ plane when the frequency and polarization reconfigurable microfluidic antenna states three and four are in operation.
Fig. 17 is a radiation pattern on the YOZ plane when the frequency and polarization reconfigurable microfluidic antenna states three and four are in operation.
Fig. 18 is a gain simulation plot for the frequency and polarization reconfigurable microfluidic antenna in state one and state two operation.
Fig. 19 is a gain simulation plot for the frequency and polarization reconfigurable microfluidic antenna states three and four operating.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1, the invention provides a frequency and polarization reconfigurable microfluidic antenna, which comprises a dielectric substrate 5, a metal patch 6, liquid metal EGaIn4 and a microfluidic driving device 7. The surface metal patch comprises a main radiation patch and branches, and the specific branches are connected or disconnected by driving the liquid metal EGaIn4 to change positions through a micro-fluidic driving device 7. Three flow channels of length 1mm, width 4mm, depth 0.1mm, length 1mm, width 4.5mm, depth 0.1mm, length 1mm, width 4mm and depth 0.1mm are formed in the medium substrate 5.
As shown in fig. 6, 7 and 8, the microfluidic driving device 7 includes a lead wire 8, an upper electrode 9, a lower electrode 10, an elastic film 11, an insulating ring 12, an air cavity 13, an air vent 14 and a micro flow channel 15; the micro flow channel 15 is sealed with nitrogen and liquid metal EGaIn4. The air cavity 13 is also sealed with nitrogen, and the air cavity 13 is connected with one end of the micro flow channel 15 through the vent hole 14, and the other end of the micro flow channel 15 is in a sealed state. The size of the lower electrode 10 is smaller than that of the upper electrode 9, and an insulating ring 12 with the thickness slightly higher than that of the lower electrode 10 is arranged around the lower electrode 10, so that the upper electrode 9 and the lower electrode 10 are prevented from being adhered together due to electrostatic attraction; the lower electrode 10 and the insulating ring 12 are fixed at the bottom of the air cavity 13, and the upper electrode 9 is adhered to the elastic film 11; the upper electrode 9 and the lower electrode 10 are respectively connected with a wire 8 for applying voltage to the electrodes; when voltage is applied, the upper electrode 9 drives the elastic film 11 to move downwards due to electrostatic attraction of the upper electrode 10 and the lower electrode, nitrogen in the air cavity 13 is discharged, and metal liquid drops in the micro-channel 15 are driven to move forwards, so that metal branches are connected; the power supply of the electrodes 9 and 10 is disconnected, the elastic film 11 drives the upper electrode 9 to rebound to the initial position, the space of the air cavity 13 is increased, nitrogen is sucked in, and the metal liquid drops are driven to move backwards, so that the metal branches are disconnected.
Therefore, the invention drives the liquid metal to move through the micro-fluidic driving technology, connects or disconnects the branch patches, changes the structure of the antenna radiation patch, and realizes the working frequency band and polarization reconstruction of the antenna.
The relevant parameters of the inventive antenna are shown in table 1.
TABLE 1
| Parameters (parameters) | W1 | W2 | W3 | W4 | W5 |
| Value (mm) | 3.2 | 1.5 | 1.7 | 2 | 6.5 |
| Parameters (parameters) | W6 | W7 | W8 | W9 | W10 |
| Value (mm) | 2 | 1.5 | 14 | 1.5 | 1.5 |
| Parameters (parameters) | W11 | W12 | W13 | L1 | L2 |
| Value (mm) | 1.5 | 2.8 | 1.5 | 5.8 | 5.2 |
| Parameters (parameters) | L3 | L4 | L5 | L6 | L7 |
| Value (mm) | 1.5 | 3 | 3 | 24 | 21 |
| Parameters (parameters) | L8 | L9 | L10 | L11 | L12 |
| Value (mm) | 2 | 2 | 15 | 3.7 | 1.5 |
| Parameters (parameters) | L13 | ||||
| Value (mm) | 3.5 |
Fig. 10 to 13 are an |s11| simulation curve and an axial ratio simulation curve, respectively, for the antenna in four states. As can be seen from fig. 9 to 12, the impedance bandwidth is 14.15% (4.4 to 5.07 GHz) when the antenna is operated in the state; when the antenna works in the second state, the impedance bandwidth is 22.08% (4.03-5.03 GHz), and the 3dB axial ratio bandwidth is 31.12% (4.26-5.83 GHz); when the antenna works in the third state, the impedance bandwidth is 36.52 percent (6.96-10.07 GHz); when the antenna works in the state four, the impedance bandwidth is 68.31% (4.73-10.01 GHz), and the 3dB axial ratio bandwidth is 18.27% (7.31-8.78 GHz).
Figures 14-17 show far field patterns of the antenna at the center frequency in four states, and it can be seen that the antenna has good radiation characteristics in all four operating states.
Fig. 18 and 19 are gain simulation curves of the antenna in four states, respectively, and it can be seen that the average gains of the four operating states in the 5Gsub-6-GHz band (4.4 GHz-5 GHz) or the ITU band (7.7 GHz-8.1 GHz) are 3.10dB, 2.27dB, 3.14dB, and 3.21dB, respectively.
The frequency band and polarization of the invention have four reconfigurable states, specifically including:
state 1: the position 1 is provided with liquid metal, so that metal branches at corresponding positions are connected; position 2 is free of liquid metal, and the corresponding metal branch is disconnected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (a). At this time, the antenna is linearly polarized and works in the 4.4-5 GHz band.
State 2: the position 1 is provided with liquid metal, so that metal branches at corresponding positions are connected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (b). At this time, the antenna is circularly polarized and works in the 4.4-5 GHz band.
State 3: position 1 has no liquid metal, and the corresponding metal branch is disconnected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; position 3 is free of liquid metal and the corresponding metal dendrite breaks as shown in fig. 9 (c). At this time, the antenna is linearly polarized and works in the 7.7-8.5 GHz band.
State 4: position 1 has no liquid metal, and the corresponding metal branch is disconnected; the position 2 is provided with liquid metal, so that the metal branches at the corresponding positions are connected; the location 3 has liquid metal, which connects the metal branches of the corresponding location, as shown in fig. 9 (d). At this time, the antenna is circularly polarized and works in the 7.7-8.5 GHz band.
The invention realizes the reconfigurability of the working frequency band and polarization of the antenna by a micro-fluidic technology, and covers the 5G sub-6-GHz wave band (4.4 GHz-5 GHz) and the ITU wave band (7.7 GHz-8.1 GHz). The invention has the characteristics of wide frequency band coverage, strong practicability, voltage control, strong functionality and the like, and is small and thin, simple in structure, convenient to operate, low in noise, long in service life, wide in bandwidth and small in axial ratio, and supports high-power input.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the specific embodiments described above, and that the above specific embodiments and descriptions are provided for further illustration of the principles of the present invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (6)
1. A frequency and polarization reconfigurable microfluidic antenna, characterized by: the micro-fluidic antenna comprises a liquid metal position (1), a liquid metal position (2), a liquid metal position (3), a liquid metal EGaIn (4), a medium substrate (5), a metal patch (6), a micro-fluidic driving device (7), a wire (8), an upper electrode (9), a lower electrode (10), an elastic film (11), an insulating ring (12), an air cavity (13), an air vent (14) and a micro-channel (15), wherein the metal patch (6) is arranged on the upper layer of the medium substrate (5), and the metal patch (6) comprises a main radiation patch connected with a micro-strip feeder line and a branch patch for controlling frequency and polarization reconstruction, and is used for controlling the liquid metal to move and connecting or disconnecting different radiation branches through micro-fluidic driving;
the micro-fluidic driving device (7) comprises a wire (8), an upper electrode (9), a lower electrode (10), an elastic film (11), an insulating ring (12), an air cavity (13), an air vent (14) and a micro-channel (15), wherein the size of the upper electrode (9) is larger than that of the lower electrode (10), the insulating ring (12) is arranged around the lower electrode (10), the thickness of the insulating ring (12) is larger than that of the lower electrode (10), the upper electrode (9) is adhered to the upper surface of the elastic film (11), the upper electrode (9) and the lower electrode (10) are both metal foils, the wires (8) are respectively connected, the cross section of the micro-channel (15) is rectangular, nitrogen and liquid metal EGaIn (4) are sealed in the micro-channel, one end of the micro-channel (15) is communicated with the air cavity (13) of the micro-driving device (7) through the air vent (14), and the other end of the micro-channel is sealed.
2. A frequency and polarization reconfigurable microfluidic antenna according to claim 1, wherein: the main radiation patch is formed by 8 rectangular geometric splicing, and the dimensions of the main radiation patch are respectively 5.8mm long and 3.2mm wide; 5.2mm long, 1.5mm wide, 1.5mm long and 1.7mm wide; 3mm long and 2mm wide; 3mm long and 6.5mm wide; 24mm long and 2mm wide; 21mm long and 1.5mm wide; 2mm long and 14mm wide.
3. A frequency and polarization reconfigurable microfluidic antenna according to claim 1, wherein: the microfluidic antenna comprises an upper branch patch, a middle branch patch and a lower branch patch, wherein the upper branch patch is L-shaped and consists of rectangular metal with the length of 2mm, the width of 1.5mm, the length of 15mm and the width of 1.5mm; the middle-end branch patch consists of rectangular metal with the length of 3.7mm and the width of 1.5mm, and the lower-end branch patch is L-shaped and consists of rectangular metal with the length of 1.5mm, the width of 2.8mm, the length of 3.5mm and the width of 1.5 mm.
4. A frequency and polarization reconfigurable microfluidic antenna according to claim 1, wherein: the dielectric substrate (5) is a polytetrafluoroethylene glass cloth copper-clad laminate F with a dielectric constant of 2.2 and a tangent loss angle of 0.0007 4 BM220。
5. A frequency and polarization reconfigurable microfluidic antenna according to claim 1, wherein: the dielectric substrate (5) is a cuboid with the length of 28mm, the width of 22mm and the thickness of 1.5 mm.
6. A frequency and polarization reconfigurable microfluidic antenna according to claim 1, wherein: the three liquid metal positions of the medium substrate (5) are respectively provided with a runner with the length of 1mm, the width of 4mm, the depth of 0.1mm, the length of 1mm, the width of 4.5mm, the depth of 0.1mm, the length of 1mm, the width of 4mm and the depth of 0.1 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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