Plant Antenna and its Manufacturing Method

Abstract

The application provides a plant antenna, comprising a carrier plant, the carrier plant is provided with two cavities which are spaced apart, the two cavities are filled with liquid metal which keeps liquid at normal temperature, and further comprising a connecting line; the connecting line is a radio frequency line, one end of the radio frequency line is provided with two connectors, the two connectors are connected with the liquid metal in the two cavities respectively; or the connecting line is a wire, two ends of the wire are connected with the liquid metal in the two cavities respectively, and a balancer is arranged on the wire; or the connecting line is a wire, two ends of the wire are connected with the liquid metal in the two cavities respectively. The plant antenna and the manufacturing method thereof have the advantages of strong practicability and strong concealment, and the plant antenna has practical effects. The application further provides a plant antenna manufacturing method.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a plant antenna and its manufacturing method. Background Technology

[0002] An antenna is a transducer that converts guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. It is a component in wireless equipment used to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, and radio astronomy—anything that uses electromagnetic waves to transmit information—rely on antennas. Furthermore, antennas are also needed for non-signal energy radiation in the transmission of energy using electromagnetic waves. Generally, antennas are reversible, meaning the same antenna can be used as both a transmitting and receiving antenna.

[0003] Currently, research on fabricating antennas within plants is still lacking. Previous antenna fabrication methods typically used rigid materials, which could damage plants and hinder applications. Furthermore, the scarcity of shape-adaptable conductors with excellent electrical conductivity has prevented this promising field from receiving sufficient attention. Summary of the Invention

[0004] The plant antenna and its manufacturing method provided by this invention innovatively utilize the structural features of certain plants to manufacture antenna devices with practical effects, which are highly practical and highly concealed.

[0005] This invention provides a plant antenna, including a carrier plant, the carrier plant having two cavities spaced apart, the two cavities being filled with liquid metal that remains liquid at room temperature, and also including connecting wires;

[0006] The connecting line is a radio frequency line, and one end of the radio frequency line is provided with two connectors, which are respectively connected to the liquid metal in the two cavities.

[0007] Alternatively, the connecting line is a conductor, with both ends of the conductor connected to the liquid metal in the two cavities respectively, and a balancer is provided on the conductor;

[0008] Alternatively, the connecting line is a conductor, and the two ends of the conductor are respectively connected to the liquid metal in the two cavities.

[0009] According to the present invention, in a dipole plant antenna, the ends of the liquid metal in the two cavities that are far apart from each other are respectively connected to metal wires.

[0010] According to the present invention, a dipole plant antenna is provided, wherein the metal wire is a copper wire.

[0011] According to the present invention, the liquid metal is a gallium-based alloy, a eutectic gallium-indium alloy, or a eutectic gallium-indium-tin alloy.

[0012] According to the present invention, in a dipole plant antenna, two adjacent cavities are coaxially arranged.

[0013] According to the present invention, the lengths of two adjacent cavities are L1 and L2, respectively, wherein L1 = 0.9L2 ~ 1.1L2.

[0014] According to the present invention, a dipole plant antenna is provided, wherein the carrier plant is bamboo.

[0015] The present invention also provides a method for manufacturing a plant antenna, comprising:

[0016] S1. Select the carrier plant and prepare the connecting wire;

[0017] S2. Inject liquid metal that remains liquid at room temperature into the two adjacent cavities of the carrier plant;

[0018] S3. Connect the liquid metals located in the two cavities respectively using the connecting line to form an antenna.

[0019] The method for manufacturing a plant antenna according to the present invention further includes:

[0020] S4. Connect metal wires to the ends of the liquid metal in the two cavities that are far apart from each other.

[0021] According to the plant antenna manufacturing method provided by the present invention, in step S2, before injecting liquid metal, through holes are drilled on the upper and lower sides of each cavity sidewall, and liquid metal is injected into the cavity through the upper through hole. Before the liquid metal flows out from the lower through hole, the lower through hole is sealed until the cavity is filled, and finally the upper through hole is sealed.

[0022] According to the plant antenna manufacturing method provided by the present invention, the material used to seal the through hole is silicone.

[0023] The plant antenna and its manufacturing method provided by this invention innovatively utilize the structural features of certain plants to manufacture antenna devices with practical effects, which are highly practical and highly concealable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an embodiment of the dipole plant antenna provided by the present invention;

[0026] Figure 2 This is a schematic diagram of an embodiment of the dipole plant antenna manufacturing method provided by the present invention;

[0027] Figure 3 This is one of the comparative schematic diagrams of return loss after adding metal wire to the dipole plant antenna provided by the present invention;

[0028] Figure 4 This is the second comparative schematic diagram of the return loss of the dipole plant antenna provided by the present invention after adding metal wires;

[0029] Figure 5 This is a schematic diagram of an embodiment of the dipole plant antenna with balun provided by the present invention;

[0030] Figure 6 This is a schematic diagram comparing the return loss of the dipole plant antenna with balun provided by the present invention with that of a regular dipole plant antenna.

[0031] Figure 7 This is a schematic diagram of an embodiment of the monopole plant antenna provided by the present invention;

[0032] Figure 8 This is a schematic diagram of the return loss of the monopole plant antenna provided by the present invention.

[0033] Figure label:

[0034] 1-Bamboo; 2-Cavity; 3-Liquid metal; 4-RF wire; 5-Copper wire; 6-Equalizer; 7-Through hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] The following is combined Figures 1-8Describes the plant antenna of the present invention and its manufacturing method.

[0037] Example 1 - Dipole Plant Antenna and its Manufacturing Method

[0038] like Figure 1 The diagram shown is a schematic representation of Embodiment 1 of the plant antenna provided by this invention. The plant antenna of this embodiment includes a carrier plant with two spaced-apart cavities 2. Each cavity 2 is filled with liquid metal 3, which remains liquid at room temperature. It also includes connecting wires; in this embodiment, the connecting wires are radio frequency (RF) wires 4. One end of the RF wire 4 has two connectors, which are respectively connected to the liquid metal 3 within the two cavities 2, thus forming a dipole antenna. In this embodiment, the carrier plant is bamboo 1. Bamboo 1 has spaced-apart cavities 2 with only a small difference in length between adjacent cavities 2, and the cavities 2 meet the requirement of coaxial arrangement, which better conforms to the structural characteristics of a dipole plant antenna. Therefore, bamboo 1 is a suitable carrier plant for making a plant antenna. In this embodiment, the liquid metal 3 is a gallium-based alloy. Experiments show that after injecting the gallium-based alloy into the inner cavity of bamboo 1 for six months, bamboo 1 can still grow new leaves, indicating that the gallium-based alloy does not adversely affect the growth of bamboo 1. Of course, in some embodiments, the liquid metal 3 can also be a eutectic gallium-indium alloy or a eutectic gallium-indium-tin alloy.

[0039] like Figure 1 As shown, in this embodiment, the ends of the liquid metal 3 in the two cavities 2 that are far apart from each other are respectively connected to characteristic adjustment metal wires. Specifically, in this embodiment, the characteristic adjustment metal wires are copper wires 5, combined with the attached... Figure 3 It can be seen that, compared with a regular dipole antenna, the addition of copper wire 5 significantly reduces the return loss at different frequencies of the dipole antenna. Furthermore, combined with the attached... Figure 4 It is evident that extending or shortening the length of the copper wire 5 has little impact on antenna performance. Therefore, in practical implementation, a very short copper wire 5 can effectively reduce return loss. Furthermore, the shorter the copper wire 5, the stronger its concealment.

[0040] In this embodiment, the lengths of two adjacent cavities 2 are L1 and L2, respectively, where L1 = 0.9L2 to 1.1L2. For example, when the length of L1 is 100 mm, a length range of 90 to 110 mm for L2 is more suitable. This is because, according to the structural characteristics of a dipole antenna, the length of a single cavity 2 is close to one-quarter of the wavelength, and the sum of the lengths of two adjacent cavities 2 is close to half the wavelength. The smaller the difference in length between adjacent cavities 2, the more it conforms to the structural characteristics of a dipole antenna, resulting in higher accuracy. Measurements are required during the selection of carrier plants.

[0041] This embodiment also provides a method for manufacturing a dipole plant antenna; please refer to the appendix. Figure 2 The method for manufacturing a dipole plant antenna in this embodiment includes:

[0042] S1. Select a carrier plant and prepare a connecting wire. In this embodiment, the connecting wire is a radio frequency line 4, and the end of the radio frequency line 4 is provided with two connectors.

[0043] S2. Liquid metal 3, which remains liquid at room temperature, is injected into the two adjacent cavities 2 of the carrier plant. In this embodiment, the injected liquid metal 3 is a gallium-based alloy, and the device used to inject the liquid metal 3 is a syringe.

[0044] S3. Connect the two connectors of the radio frequency line 4 to the liquid metal 3 located in the two cavities 2 respectively to form an antenna.

[0045] S4. Connect copper wires 5 to the ends of the liquid metals 3 in the two cavities 2 that are far apart from each other.

[0046] After completing the above steps, check the connection of the wires to ensure they are intact, and cut off any excess wire ends.

[0047] In step S2 of this embodiment, before injecting the liquid metal 3, holes are drilled on the upper and lower sides of the sidewall of each cavity 2. Liquid metal 3 is injected into the cavity 2 through the upper hole. The lower through hole 7 is sealed before the liquid metal 3 flows out from the lower through hole 7 until the cavity 2 is full. Finally, the upper through hole 7 is sealed. The material used to seal the through hole 7 is silicone. Setting the through hole 7 is beneficial for injecting liquid metal 3 into the cavity 2 and can ensure that the antenna is continuous. The two through holes 7 of two adjacent cavities 2 that are close to each other also facilitate the connection of the two connectors of the radio frequency line 4 to the liquid metal 3 respectively. The two cavities 2 that are far apart also facilitate the connection between the copper wire 5 and the liquid metal 3.

[0048] It should be noted that,

[0049] Example 2 - Dipole Antenna with Balun

[0050] This embodiment provides a dipole antenna with a balun, such as... Figure 5 As shown, the balun-equipped dipole antenna of this embodiment differs from that of Embodiment 1 in that the connecting line is a wire, with both ends of the wire connected to the liquid metal 3 inside the two cavities 2 respectively. A balancer 6 is provided on the wire. Thus, a balun-equipped dipole antenna is constructed. The experimental results of its property testing are as follows... Figure 6 As shown, experimental results demonstrate that the dipole antenna with balun is highly effective, thus providing an alternative strategy for modifying the characteristics of liquid metal 3-antennas within plants (improving plant antenna characteristics by adding components). In other words, similar to ordinary antennas, the relevant characteristics of plant antennas can be improved by adding components, which is of great significance for antenna implementation.

[0051] It should be noted that the manufacturing method of the dipole antenna with balun is similar to that of the dipole antenna described in Example 1, and will not be repeated here.

[0052] Example 3 - Monopole Antenna

[0053] This embodiment provides a monopole antenna, such as Figure 7 As shown, the difference between the monopole antenna in this embodiment and Embodiment 1 is that the connecting line is a wire, with both ends of the wire connected to the liquid metal 3 inside the two cavities 2 respectively. This constitutes a monopole antenna. The monopole antenna can be simply designed with a quarter-wavelength conductor connected to the inner core of the RF cable, and the outer conductor connected to ground. The experimental results of the property test of the monopole antenna in this embodiment are as follows... Figure 8 As shown, compared with dipole antennas, monopole antennas can hide their feed lines inside the soil, which is beneficial for better camouflage and concealment, and is especially important for their military applications.

[0054] It should be noted that the manufacturing method of the monopole antenna is similar to that of the dipole antenna described in Example 1, and will not be repeated here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plant antenna, characterized in that, The carrier plant is provided with two cavities arranged at intervals, the two cavities are filled with liquid metal which keeps liquid at normal temperature, and a connecting wire is further provided; The connecting wire is a radio frequency wire, one end of the radio frequency wire is provided with two connectors, the two connectors are connected with the liquid metal in the two cavities respectively; or the connecting wire is a wire, two ends of the wire are connected with the liquid metal in the two cavities respectively, and a balancer is arranged on the wire; or the connecting wire is a wire, two ends of the wire are connected with the liquid metal in the two cavities respectively. The liquid metal is gallium-based alloy. The carrier plant is bamboo.

2. The plant antenna of claim 1, wherein, The liquid metal in the two cavities is connected with characteristic adjusting metal wires at the ends far away from each other respectively.

3. The plant antenna of claim 2, wherein, The characteristic adjusting metal wires are copper wires.

4. The plant antenna according to any one of claims 1-3, c h a r a c t e r i z e d i n that The two cavities are coaxially arranged.

5. The plant antenna according to any one of claims 1-3, c h a r a c t e r i z e d i n that The lengths of the two cavities are L1 and L2 respectively, and L1=0.9L2~1.1L2.

6. A plant antenna manufacturing method based on the plant antenna according to any one of claims 1 to 5, characterized by, The method comprises the steps that: S1, selecting a carrier plant and preparing a connecting wire; S2, injecting liquid metal which keeps liquid at normal temperature into the two cavities of the carrier plant; S3, connecting the liquid metal in the two cavities by the connecting wire and forming an antenna.

7. The plant antenna manufacturing method according to claim 6, wherein The method further comprises the steps that: S4, connecting metal wires at the ends far away from each other of the liquid metal in the two cavities respectively.

8. The plant antenna manufacturing method according to claim 6 or 7, characterized by, In step S2, before injecting the liquid metal, a through hole is punched on the upper and lower sides of the side wall of each cavity, the liquid metal is injected into the cavity through the upper through hole, the lower hole is sealed before the liquid metal flows out from the lower through hole, until the cavity is filled, and finally the upper through hole is sealed.

9. The plant antenna manufacturing method according to claim 8, wherein The material for sealing the through hole is silica gel.

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