Three-state reconstruction method based on multifunctional planar inverted-F-shaped water antenna

Abstract

The invention discloses a tri-state reconstruction method based on a multifunctional planar inverted-F-shaped water antenna, which comprises the steps that a cylindrical water container and a rectangular water container which are communicated with each other are arranged on a grounding plane, a short-circuit wire is soldered on the grounding plane, and the upper end and the lower end of the short-circuit wire are subjected to copper coating treatment; a copper foil adhesive tape is bonded between the copper-clad positions at the upper and lower ends of the short-circuit line, and the top end of the short-circuit line penetrates into the rectangular water container; a feed structure is further arranged at the bottom end of the cylindrical water container; the cylindrical water container is filled with water, the water antenna is a monopole antenna, water is continuously injected, the rectangular water container is filled with water, and the type of the water antenna is changed into an inverted F antenna; by stripping the copper foil adhesive tape, the short-circuit line is separated from the water container, and the type of the water antenna is changed into an inverted L-shaped antenna; the antenna has the advantages that conversion of three different types of antennas including a monopole antenna, an inverted-F antenna and an inverted-L antenna can be achieved, frequency reconfiguration and directional diagram reconfiguration are also achieved, and the multiplexing rate of the antenna is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of water antennas, and in particular to a three-state reconstruction method based on a multifunctional planar inverted-F type water antenna. Background Art

[0002] Compared with traditional antennas, water antennas designed based on the characteristics of water are not only low-cost and easy to access, but also have the characteristics of concealment and emergency response. They have become very popular in recent years. Water is easier to process into any shape than general media and metals. Therefore, due to its unique advantages, water antenna technology has great potential in various fields such as communications. With the development of current communication technology, the requirements for antennas are getting higher and higher. However, traditional water antennas are usually designed for specific communication frequency bands, application scenarios or working modes, and have limitations such as fixed frequency bands and single functions. Once the design and manufacturing are completed, the antenna structure cannot be changed, and the working characteristics cannot be changed, making it difficult to adapt to the increasingly complex and changing needs of modern communication systems. Patent publication number CN114843759B discloses a monopole water antenna, including a coaxial cable, a metal base plate, a base, a first water tank, a second water tank and four arc-shaped water arms. By filling water into the two water tanks, omnidirectional radiation can be achieved in both working frequency bands; however, since the water antenna cannot change the structure, function and other characteristics of the antenna in real time according to the needs of the actual working environment, there is a problem that it is not possible to more flexibly select the frequency band and match the corresponding radiation mode according to the scene requirements, which greatly limits the application of the water antenna. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a three-state reconstruction method based on a multifunctional planar inverted F-type water antenna, which can realize the conversion of three different types of antennas: monopole antenna, inverted F antenna and inverted L antenna, and also realize frequency reconfiguration and radiation pattern reconfiguration. The antenna can more flexibly select the frequency band and match the corresponding radiation mode according to the scene requirements, effectively improving the reuse rate of the antenna. The water antenna has a simple structure and convenient reconstruction operation, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a three-state reconstruction method based on a multifunctional planar inverted F-type water antenna, the three-state reconstruction method comprising a cylindrical water container and a rectangular water container provided on a ground plane, a dielectric base provided between the cylindrical water container and the ground plane; the rectangular water container is provided at the top of the cylindrical water container and is interconnected with the cylindrical water container; a short circuit line is soldered on the ground plane, the upper and lower ends of the short circuit line are copper-clad, and copper foil tape is bonded between the copper-clad parts at the upper and lower ends of the short circuit line, and the top of the short circuit line penetrates into the rectangular water container; a feeding structure is also provided at a position corresponding to the cylindrical water container on the ground plane; the specific antenna reconstruction method is as follows: Water is poured into the cylindrical water container through the water inlet of the rectangular water container, and the cylindrical water container is filled with water. At this time, the water antenna type is a monopole antenna, which is the first working state of the water antenna. Since the copper foil tape is attached to the short-circuit line, the short-circuit line can be used as a reflection surface of the monopole antenna, thereby enhancing the directivity of the monopole antenna. At this time, the radiation direction of the water antenna presents dual-beam radiation. Continue to inject water through the water inlet of the rectangular water container and fill the rectangular water container with water. At this time, the type of the water antenna changes to an inverted F antenna, which is the second working state of the water antenna. At this time, the inverted F antenna has an additional water patch compared to the monopole antenna. The length of the antenna increases, and the working frequency band moves to a low frequency, realizing frequency reconstruction. At this time, the radiation direction of the water antenna presents multi-beam radiation. By peeling off the copper foil tape, the short-circuit line is separated from the water container. At this time, the type of the water antenna becomes an inverted L antenna, which is the third working state of the water antenna, and frequency reconstruction is achieved again. At this time, the radiation direction of the water antenna becomes wide-angle directional radiation.

[0005] Furthermore, the feeding structure includes an SMA connector coaxially arranged with the cylindrical water container, the SMA connector is fixed on the ground plane, and a probe of the SMA connector passes through the ground plane and the dielectric base and extends into the cylindrical water container, and a metal disc is welded to the top of the probe.

[0006] Furthermore, the medium base is a Teflon gasket.

[0007] Furthermore, the short-circuit line is a FR4 dielectric board, and the thickness of the short-circuit line is 1 mm.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the three-state reconstruction method based on the multifunctional planar inverted F-type water antenna can realize the conversion of three different types of antennas, namely, monopole antenna, inverted F antenna and inverted L antenna, by adjusting the water content in the container and the existence state of the short-circuit line, and also realizes frequency reconfiguration and radiation pattern reconfiguration, while achieving the above characteristics, it can also maintain the characteristics of wideband; at the same time, the working frequency band of the water antenna is also switched between 1.95 GHz in the monopole antenna state, 1.35 GHz in the inverted F antenna state and 2.05 GHz in the inverted L antenna state. This synergistic feature enables the antenna to more flexibly select the frequency band and match the corresponding radiation mode according to the scene requirements, thereby effectively improving the reuse rate of the antenna, and the water antenna has a simple structure and convenient reconstruction operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a stereoscopic diagram of the water pouring antenna of the present invention; Figure 2 It is a cross-sectional view of the water-sky line of the present invention; Figure 3This is a schematic structural diagram of the first working state of the water antenna of the present invention; Figure 4 This is the first working state of the water antenna of the present invention. S 11 |Measurement and simulation results diagram; Figure 5 This is a graph showing the measurement and simulation results of the gain (Gain) of the water antenna of the present invention in the first working state; Figure 6 The radiation pattern of the XOY plane of the water antenna of the present invention measured and simulated in the first working state; Figure 7 The radiation pattern of the YOZ plane of the water antenna of the present invention measured and simulated in the first working state; Figure 8 This is a schematic structural diagram of the second working state of the water antenna of the present invention; Fig. 9 The water antenna of the present invention is in the second working state | S 11 |Measurement and simulation results diagram; Fig.10 This is a graph showing the measurement and simulation results of the gain (Gain) of the water antenna of the present invention in the second working state; Fig.11 The radiation pattern of the XOY plane of the water antenna of the present invention measured and simulated in the second working state; Fig.12 The radiation pattern of the YOZ plane of the water antenna of the present invention measured and simulated in the second working state; Fig.13 This is a schematic structural diagram of the third working state of the water antenna of the present invention; Fig.14 The water antenna of the present invention is in the third working state | S 11 |Measurement and simulation results diagram; Fig.15 The figure is a measurement and simulation result diagram of the gain (Gain) of the water antenna of the present invention in the third working state; Fig.16 The radiation pattern of the XOY plane of the water antenna of the present invention is the measurement and simulation results under the third working state; Fig.17 The radiation pattern of the YOZ plane is the measurement and simulation results of the water antenna in the third working state of the present invention.

[0010] In the figure: 1. rectangular water container; 2. cylindrical water container; 3. dielectric base; 4. ground plane; 5. short circuit line; 6. copper foil tape; 7. feeding structure; 71. SMA connector; 72. probe; 73. metal disk. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0012] See also Figure 1-2 The present invention provides a technical solution: a three-state reconstruction method based on a multifunctional planar inverted F-type water antenna, the three-state reconstruction method comprising a cylindrical water container 2 and a rectangular water container 1 provided on a ground plane 4, a dielectric base 3 is provided between the cylindrical water container 2 and the ground plane 4; the dielectric base 3 is a Teflon gasket, which can prevent the circuit from short-circuiting due to water leakage in the container and improve the bandwidth of the antenna; the rectangular water container 1 is arranged on the top of the cylindrical water container 2 and is interconnected with the cylindrical water container 2; a short-circuit line 5 is soldered on the ground plane 4, and the upper and lower ends of the short-circuit line 5 are copper-clad, and the upper and lower ends of the short-circuit line 5 are copper-clad. A copper foil tape 6 is bonded between the copper-clad parts of the short-circuit line 5, and the top of the short-circuit line 5 penetrates into the rectangular water container 1; the short-circuit line 5 is an FR4 dielectric board, and the thickness of the short-circuit line 5 is 1 mm; a feeding structure 7 is also provided at a position corresponding to the cylindrical water container 2 on the ground plane 4; the feeding structure 7 includes an SMA connector 71 coaxially arranged with the cylindrical water container 2, the SMA connector 71 is fixed on the ground plane 4, and a probe 72 of the SMA connector 71 penetrates the ground plane 4 and the dielectric base 3 and extends into the cylindrical water container 2, and a metal disc 73 is welded to the top of the probe 72; the specific antenna reconstruction method is as follows: See also Figure 3 , water is poured into the cylindrical water container 2 through the water inlet of the rectangular water container 1, and the cylindrical water container 2 is filled with water. At this time, the water antenna type is a monopole antenna, which is the first working state of the water antenna. Since the copper foil tape 6 is attached to the short-circuit line 5, the short-circuit line 5 can be used as a reflecting surface of the monopole antenna, thereby enhancing the directivity of the monopole antenna; S parameters are important parameters to characterize antenna performance. S 11 It is used to characterize the impedance matching status of the antenna, that is, whether the antenna is working properly. S 11 If it is below -10dB, the antenna is considered to be well matched. When analyzing S parameters, it is always necessary to observe | S 11 |To see if the antenna is functioning properly; see Figure 4 The water antenna is shown in its first working state |S 11 |Measurement and simulation results, it can be seen that when | S 11 |<10dB, it operates from 1.75 GHz to 2.66 GHz; see Figure 5 The measurement and simulation results of the two-dimensional gain (Gain) of the water antenna in the first working state are shown in Figure 1. The maximum gain value is 4.7dB; please refer to Figure 6-7 The simulated and measured radiation patterns of the water antenna in the first working state at a frequency of 1.95 GHz are shown. The radiation pattern of the water antenna presents dual-beam radiation in the horizontal plane (XOY plane) with a maximum gain of 3.9 dBi.

[0013] See also Figure 8 , based on the first working state of the water antenna, water is continued to be injected through the water injection port of the rectangular water container 1, and the rectangular water container 1 is filled with water. At this time, the type of the water antenna is changed to an inverted F antenna, which is the second working state of the water antenna. At this time, the inverted F antenna has an additional water patch compared to the monopole antenna, the length of the antenna is increased, and the working frequency band will move to a low frequency to achieve frequency reconstruction; at this time, it can be seen that by adjusting the amount of water in the container, the type of the antenna can be changed to achieve frequency reconfigurable characteristics; See also Fig. 9 Water antenna in the second working state | S 11 |Measurement and simulation results, it can be seen that when | S 11 |<-10dB, its operating frequency is 1.15 GHz-1.82 GHz; see Fig.10 The measurement and simulation results of the two-dimensional gain (Gain) of the water antenna in the second working state are shown. The maximum gain in the inverted F antenna state is 2.9dBi; please refer to Figure 11-12 The simulated and measured radiation patterns of the water antenna in the second working state at a frequency of 1.35 GHz show that the main lobe direction is offset toward the vertical plane (XOZ plane), the radiation pattern presents a multi-beam radiation state, and the maximum gain is reduced to 2 dBi.

[0014] See also Fig.13 , based on the second working state of the water antenna, the short-circuit line 5 is separated from the water container by peeling off the copper foil tape 6. At this time, the type of the water antenna becomes an inverted L antenna, which is the third working state of the water antenna. Frequency reconstruction is achieved again, and this process can be reset by re-pasting the copper foil tape 6. Its working principle is similar to that of a common inverted L antenna; See also Fig.14 The water antenna is shown in the third working state | S11 |Measurement and simulation results, it can be seen that when | S 11 |<-10dB, its operating frequency is 1.33 GHz-2.35 GHz; see Fig.15 The measurement and simulation results of the two-dimensional gain (Gain) of the water antenna in the third working state are shown. The maximum gain in the inverted L antenna state is 4.1dBi; please refer to Figure 16-17 The simulated and measured radiation patterns of the water antenna in the third working state at a frequency of 2.04 GHz are shown. The radiation pattern becomes wide-angle directional radiation in the vertical plane (XOZ plane), and the maximum gain is increased to 3.1 dBi.

[0015] The maximum gain in the monopole antenna state is 4.7dBi, the maximum gain in the inverted F antenna state is 2.9dBi, and the maximum gain in the inverted L antenna state is 4.1dBi. The water antenna maintains a high gain in the available frequency band in the three working states; The three-state reconstruction method based on the multifunctional planar inverted F-type water antenna disclosed in this embodiment can realize the conversion of three different types of antennas, namely, a monopole antenna, an inverted F antenna and an inverted L antenna, by adjusting the water content in the container and the existence state of the short-circuit line 5, and also realizes frequency reconfiguration and radiation pattern reconfiguration, while maintaining the characteristics of wide bandwidth while achieving the above characteristics; at the same time, the working frequency band of the water antenna is also switched between 1.95 GHz in the monopole antenna state, 1.35 GHz in the inverted F antenna state and 2.05 GHz in the inverted L antenna state. This synergistic feature enables the antenna to more flexibly select the frequency band and match the corresponding radiation mode according to the scene requirements, thereby effectively improving the reuse rate of the antenna.

[0016] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-state reconstruction method based on a multifunctional planar inverted F-type water antenna, the three-state reconstruction method comprising a cylindrical water container and a rectangular water container provided on a ground plane, characterized in that: A dielectric base is provided between the cylindrical water container and the ground plane; a rectangular water container is arranged at the top of the cylindrical water container and is connected with the cylindrical water container; a short circuit line is soldered on the ground plane, and both upper and lower ends of the short circuit line are copper-clad, and copper foil tape is bonded between the copper-clad parts at the upper and lower ends of the short circuit line, and the top of the short circuit line penetrates into the rectangular water container; a feeding structure is also provided at a position corresponding to the cylindrical water container on the ground plane; the specific method of reconstructing the antenna is as follows: Water is poured into the cylindrical water container through the water inlet of the rectangular water container, and the cylindrical water container is filled with water. At this time, the water antenna type is a monopole antenna, which is the first working state of the water antenna. Since the copper foil tape is attached to the short-circuit line, the short-circuit line can be used as a reflection surface of the monopole antenna, thereby enhancing the directivity of the monopole antenna. At this time, the radiation direction of the water antenna presents dual-beam radiation. Continue to inject water through the water inlet of the rectangular water container and fill the rectangular water container with water. At this time, the type of the water antenna changes to an inverted F antenna, which is the second working state of the water antenna. At this time, the inverted F antenna has an additional water patch compared to the monopole antenna. The length of the antenna increases, and the working frequency band moves to a low frequency, realizing frequency reconstruction. At this time, the radiation direction of the water antenna presents multi-beam radiation. By peeling off the copper foil tape, the short-circuit line is separated from the water container. At this time, the type of the water antenna becomes an inverted L antenna, which is the third working state of the water antenna, and frequency reconstruction is achieved again. At this time, the radiation direction of the water antenna becomes wide-angle directional radiation.

2. A three-state reconstruction method based on a multifunctional planar inverted F-type water antenna according to claim 1, characterized in that: The feeding structure includes an SMA connector coaxially arranged with the cylindrical water container, the SMA connector is fixed on a ground plane, and a probe of the SMA connector penetrates the ground plane and the dielectric base and extends into the cylindrical water container, and a metal disc is welded to the top of the probe.

3. The three-state reconstruction method based on the multifunctional planar inverted F-type water antenna according to claim 1 is characterized in that: The medium base is a Teflon gasket.

4. The three-state reconstruction method based on the multifunctional planar inverted F-type water antenna according to claim 1 is characterized in that: The short-circuit line is a FR4 dielectric board, and the thickness of the short-circuit line is 1 mm.

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