Vivaldi ground penetrating radar antenna and use method thereof

Abstract

The invention belongs to the technical field of microwave antennas, and discloses a Vivaldi ground penetrating radar antenna and a using method thereof.The antenna comprises an antenna body, two sets of index gradual change structures are arranged on the antenna body from a coaxial feeding point to the top of the antenna body, the two sets of index gradual change structures are communicated with a feeding structure respectively, and therefore the antenna body is formed. The design may help to improve the structural stability of the antenna and reduce the dependence on a multi-layer structure and a fixed assembly, thereby enhancing the durability and reliability of the antenna in a practical application environment. According to the antenna, the antenna structure is optimized, namely the vivaldi antenna is used as a basic structure, so that the suppression of back radiation is realized, the requirement of structural stability is met, and the antenna has good popularization and application values.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave antennas, and in particular relates to a Vivaldi ground penetrating radar antenna and a method of using the same. Background Art

[0002] Ground Penetrating Rader (GPR) is a very effective target detection device. It is an effective tool for non-destructive detection and through-wall imaging of subsurface structures and buried objects. Since the 1960s, ground penetrating radar has gone through a process from conception to gradual development. The emergence of ground penetrating radar has greatly improved human's understanding and transformation capabilities of objective objects. During the process of equidistant ground movement measurement, the ground penetrating radar antenna can obtain reflection signals that change with spatial position, and the changes in the amplitude and delay of these reflection signals imply the changes in medium parameters. By analyzing and processing the obtained reflection signals, the target body can be detected and its spatial shape, medium characteristics and burial depth can be determined. Ground penetrating radar relies on time domain narrow pulse signals for underground structure detection. Time domain narrow pulse signals have suitable material penetration capabilities and contain rich spectral content. They will have different signal performances when they come into contact with different materials, thereby achieving detection. To transmit time domain narrow pulse signals, ultra-wideband pulse antennas are required. When used in ground-penetrating radar, ultra-wideband pulse antennas need to meet the following conditions: First, the antenna should have ultra-wideband characteristics, which can achieve frequency doubling or even a relative bandwidth of 10:1; second, the antenna should have good radiation directivity; and finally, since the pulse signal in the ultra-wideband system has the characteristics of a high peak value, the antenna must have an ultra-high power capacity to avoid being penetrated by instantaneous high power. In addition, ground-penetrating radar antennas have high requirements in terms of the fidelity of the time domain waveform and the radiation beam width.

[0003] However, existing ground-penetrating radar antennas have certain limitations, which are specifically manifested in the following aspects: for example, Chinese Patent Publication No. CN116169468A discloses an ultra-wideband directional radiation antenna, which reflects the energy radiated upward from the back to the floor downward through a metal reflector to achieve directional radiation, and uses a metasurface to improve impedance matching and increase gain; however, the entire antenna adopts a multi-layer structure, and a fixed component needs to be added to it; in some application environments, the structural stability of the entire antenna cannot be guaranteed; in addition, Chinese Patent Publication No. CN115983179A discloses an optimization method and an optimization structure for an ultra-wideband butterfly-shaped slotted antenna; although it improves high-frequency impedance matching by changing the shape of the antenna input end and rounding the antenna, reducing the reflection at the end of the antenna and suppressing the ringing effect; however, the antenna is bidirectional radiation, and in ground-penetrating radar applications, the back radiation of the antenna is not suppressed, thereby introducing interference signals; in addition, the above-mentioned antenna structure is difficult to achieve a larger relative bandwidth without changing the volume.

[0004] It can be seen that the existing ground penetrating radar antenna structure has poor stability and fidelity and cannot meet the actual application requirements of ground penetrating radar. Summary of the invention

[0005] The present invention provides a Vivaldi ground penetrating radar antenna and a method of using the same, so as to solve the technical problem that the existing ground penetrating radar antenna has poor structural stability and fidelity and cannot meet the actual application requirements of the ground penetrating radar.

[0006] In order to achieve the above object, the present invention adopts the following technical contents: A Vivaldi ground penetrating radar antenna, comprising an antenna body; Two groups of exponential gradient structures are arranged on the antenna body from the feeding point to the top of the antenna body; The two groups of exponential gradient structures are respectively connected to the feeding structure of the antenna body.

[0007] Furthermore, two sides of the antenna body are respectively provided with slot lines for increasing the working bandwidth of the antenna.

[0008] Furthermore, the slot line is elliptical; the slot lines on both sides of the antenna body are symmetrically arranged and are both inclined.

[0009] Furthermore, metal patches are provided on both sides of the top of the antenna body.

[0010] Furthermore, lumped resistors are respectively provided on both sides of the top of the antenna body; the metal patch is connected to the antenna body through the lumped resistors; and the metal patch is fixed to both sides of the top of the antenna body in a bending manner.

[0011] Furthermore, metal sheets for improving impedance matching of the antenna in the low frequency band are arranged from both sides of the antenna body to the bottom of the antenna body.

[0012] Furthermore, four metal sheets are used, with two metal sheets forming a group, and the two groups are symmetrically arranged; the two metal sheets in each group are correspondingly arranged on the front and back sides of the antenna body.

[0013] Furthermore, the feeding structure includes two radiating disks and a one-to-two microstrip line power divider arranged on the back plate of the antenna body.

[0014] Furthermore, the coaxial feed line is connected to the two radiation disks through an SMA connector and a one-to-two microstrip line power divider.

[0015] A method for using a Vivaldi ground penetrating radar antenna, based on the above-mentioned Vivaldi ground penetrating radar antenna, comprising: The signal is fed into the feeding structure using a coaxial feed line; The energy is fed into the antenna body by the feeding structure; Finally, the structure consisting of the antenna body and two sets of exponential gradient structures diffuses the energy into the free space.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a Vivaldi ground penetrating radar antenna, which includes an antenna body. Two groups of exponential gradient structures are arranged on the antenna body from a coaxial feeding point to the top of the antenna body, and the two groups of exponential gradient structures are respectively connected to the feeding structure. Such a design may help to improve the structural stability of the antenna, reduce the dependence on multi-layer structures and fixed components, and thus enhance the durability and reliability of the antenna in actual application environments. The antenna optimizes the antenna structure, that is, uses the Vivaldi antenna as the basic structure to suppress back radiation, thereby meeting the requirements of structural stability and having good promotion and application value.

[0017] In addition, without changing the design volume, the ground penetrating radar antenna still has an impedance matching bandwidth of more than 18:1, has good fidelity for the received signal, and the entire structure is compact and stable, which has a good application prospect in the field of ground penetrating radar. Preferably, in the present invention, slots are provided on both sides of the antenna body to change the current distribution, which can further increase the working bandwidth of the antenna and improve the radiation performance of the antenna; the antenna can cover a wider frequency range and meet the needs of more application scenarios.

[0018] Further preferably, in the present invention, the slot lines are elliptical and symmetrically arranged at an angle, which can further more effectively adjust the impedance matching of the antenna and improve the radiation efficiency and gain of the antenna.

[0019] Preferably, in the present invention, metal patches are provided on both sides of the top of the antenna body, which can enhance the directivity of the antenna, reduce backward radiation, and improve the fidelity of the antenna.

[0020] Further preferably, in the present invention, the metal patch is connected to the antenna body through a lumped resistor and fixed in a bending manner; on the one hand, the introduction of the lumped resistor weakens the reflection of the current at the end of the antenna, improves the impedance matching of the antenna in the low frequency band, and reduces the ringing effect of the antenna; on the other hand, the metal patch is bent; while not increasing the height of the antenna, the length of the top radiation patch is increased, thereby improving the impedance matching of the antenna in the low frequency band.

[0021] Preferably, in the present invention, metal sheets are arranged from both sides to the bottom of the antenna body, which can significantly improve the impedance matching of the antenna in the low frequency band, so that the antenna can also maintain good performance in the low frequency band.

[0022] Preferably, in the present invention, four metal sheets are used, and two of them are symmetrically arranged in a group. This layout can further improve the directivity and gain of the antenna, while maintaining the symmetry of the structure and improving the stability of the antenna.

[0023] Preferably, in the present invention, the feeding structure uses two radiating disks and a one-to-two microstrip line power divider. This design can more effectively transmit energy from the feeding point to the free space of the antenna, thereby improving the radiation efficiency and gain of the antenna.

[0024] Further preferably, in the present invention, the coaxial feed line is connected to the two radiating disks through an SMA connector and a one-to-two microstrip line power divider. This connection method is simple and reliable, facilitates the installation and debugging of the antenna, and ensures efficient transmission of the signal.

[0025] The present invention also provides a method for using the Vivaldi ground penetrating radar antenna, based on the above-mentioned Vivaldi ground penetrating radar antenna; the method directly uses a coaxial feeder to efficiently feed the signal into the feed structure, and then the feed structure feeds the energy into the antenna body, and finally the structure composed of the antenna body and two groups of exponential gradient structures (2) together diffuses the energy stably and widely into the free space. The use of this method not only simplifies the antenna use process and improves the efficiency of signal transmission, but also benefits from the structural characteristics of the Vivaldi antenna itself, effectively avoiding the use of multi-layer structures and fixed components, thereby enhancing the structural stability of the antenna; the reduction of back radiation achieved by the Vivaldi antenna structure and the reduction of ringing effects achieved by lumped resistance improve the fidelity of the signal. The use of this method can better meet the requirements of ground penetrating radar in practical applications for structural stability, signal fidelity and ease of operation; after the coaxial feeder feeds the signal through the SMA connector, it must pass through a one-to-two microstrip line power divider before the signal can be fed into the radiation disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a Vivaldi ground penetrating radar antenna provided in an embodiment of the present invention; Figure 2 A partial schematic diagram of a back plate of a Vivaldi ground penetrating radar antenna provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of an antenna body of a Vivaldi ground penetrating radar antenna provided in an embodiment of the present invention; Figure 4 A schematic diagram of the antenna port reflection coefficient of a Vivaldi ground penetrating radar antenna provided in an embodiment of the present invention; Figure 5 A directional pattern of a Vivaldi ground penetrating radar antenna at 100 MHz provided by an embodiment of the present invention; Figure 6 A directional pattern of a Vivaldi ground penetrating radar antenna at 500 MHz provided by an embodiment of the present invention; Figure 7 A directional pattern of a Vivaldi ground penetrating radar antenna at 1000 MHz provided by an embodiment of the present invention; Figure 8 A directional pattern of a Vivaldi ground penetrating radar antenna at 1500 MHz provided by an embodiment of the present invention; Fig. 9 A directional pattern of a Vivaldi ground penetrating radar antenna at 1800 MHz provided by an embodiment of the present invention; Fig.10 A graph showing the time domain performance test results of a Vivaldi ground penetrating radar antenna provided in an embodiment of the present invention.

[0027] Reference numerals: 1. Antenna body; 2. Exponential gradient structure; 3. Metal patch; 4. Slot line; 5. Metal sheet; 6. Lumped resistor; 7. Radiating disk. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1 As described in the background technology, the existing ground penetrating radar antenna has certain limitations, which are specifically manifested in: for example, Chinese Patent Publication No. CN116169468A discloses an ultra-wideband directional radiation antenna, which reflects the energy radiated upward from the back to the floor downward through a metal reflector to achieve directional radiation, and uses a metasurface to improve impedance matching and increase gain; however, the entire antenna adopts a multi-layer structure, and a fixed component needs to be added to it; in some application environments, the structural stability of the entire antenna cannot be guaranteed; in addition, Chinese Patent Publication No. CN115983179A discloses an optimization method and optimized structure of an ultra-wideband butterfly slot antenna; although it improves high-frequency impedance matching by changing the shape of the antenna input end and rounding the antenna, reducing the reflection at the end of the antenna and suppressing the ringing effect; however, the antenna is bidirectional radiation, and in ground penetrating radar applications, the back radiation of the antenna is not suppressed, thereby introducing interference signals.

[0036] It can be seen that the existing ground penetrating radar antenna has the following problems: First, the ground penetrating radar antenna has insufficient structural stability; second, the ground penetrating radar antenna has poor directional radiation performance; third, the ground penetrating radar antenna has weak ultra-wideband performance; fourth, the ground penetrating radar antenna has low ringing time domain performance; fifth, it is large in size and cannot be miniaturized.

[0037] The present invention provides a Vivaldi ground penetrating radar antenna, which can be used for ground penetrating radar and can receive and transmit signals. The present invention aims to solve the problems of unstable structure, narrow bandwidth, large antenna volume and the like of existing ground penetrating radar antennas, and to provide an ultra-wideband miniaturized Vivaldi antenna.

[0038] The glossary is as follows: Vivaldi antenna, also known as tapered slot antenna (TSA), is an ideal antenna for broadband applications, with wide bandwidth, high gain and directional radiation characteristics. It has broad application prospects and development potential in radar, communication systems, medical detection, security detection and other fields.

[0039] like Figure 1 As shown, the present invention provides a Vivaldi ground penetrating radar antenna, which specifically includes the following structure: Antenna body 1: The antenna body 1 is the core structure of the entire antenna.

[0040] Exponential gradient structure 2: On the antenna body 1 , two groups of exponential gradient structures 2 are arranged from the feeding point to the top of the antenna body 1 .

[0041] The two groups of exponential gradient structures 2 are respectively connected to the feeding structure of the antenna body 1, and transfer energy through coupling to transmit and radiate signals.

[0042] Slot 4: Slots 4 are provided on both sides of the antenna body 1, and the slots 4 are elliptical. The slots 4 are provided to increase the working bandwidth of the antenna and improve the performance. Figure 1 and Figure 3 As shown, the groove lines 4 on both sides are symmetrically arranged and are arranged in an inclined manner.

[0043] Metal patch 3: Metal patches 3 are arranged on both sides of the top of the antenna body 1. The metal patches 3 on both sides are connected to the antenna body 1 through a lumped resistor 6, which plays a role in improving the antenna performance.

[0044] The metal patch 3 is fixed to both sides of the top of the antenna body 1 in a bending manner. Such a design can optimize the radiation characteristics of the antenna.

[0045] Metal sheet 5: Metal sheets 5 for improving the impedance matching of the antenna in the low frequency band are arranged on both sides and the bottom of the antenna body 1 .

[0046] In this embodiment, there are four metal sheets 5, two of which form a group, and the two groups are symmetrically arranged.

[0047] The two metal sheets 5 of each group are correspondingly arranged on the front and back sides of the antenna body 1 , and work together to improve the low-frequency performance of the antenna.

[0048] Also includes the feed structure: like Figure 2 As shown, the feeding structure includes two radiating disks 7 and a one-to-two microstrip line power divider arranged on the back plate of the antenna body 1.

[0049] The coaxial feed line is connected to the two radiating disks 7 through an SMA connector and a one-to-two microstrip line power divider to achieve signal feeding; after the coaxial feed line feeds the signal through the SMA connector, it must pass through the one-to-two microstrip line power divider to feed the signal into the radiating disk.

[0050] This embodiment provides a Vivaldi ground penetrating radar antenna having the following characteristics: The feeding part adopts a one-to-two microstrip power divider structure, and two groups of four exponential gradient structures are used from the coaxial feeding point to the free space. These structures complete the electromagnetic radiation from the coaxial feed line to the free space.

[0051] Slots are opened on both sides of the antenna body to complete the design of current distribution and improve the working bandwidth of the antenna.

[0052] An independent metal patch is added to the top of the antenna body as an additional radiation patch, and is connected to the antenna body through a lumped resistor to improve the low-frequency impedance matching of the antenna and reduce the ringing effect.

[0053] Metal loading is added to both sides and the top of the antenna body, which improves the low-frequency impedance matching of the antenna without increasing the height of the antenna.

[0054] Example 2 This embodiment provides another Vivaldi ground penetrating radar antenna, and the embodiment 1 is specifically implemented and the effect is verified. The specific steps of implementation are as follows: Step 1: Vivaldi Antenna Design like Figure 1 As shown, attached Figure 1 The overall structure of the Vivaldi antenna is shown in Figure 1. The antenna is composed of two exponential gradient gaps. Two sets of different exponential gradient structures 2 are designed from the feed point to the free space, which facilitates good radiation characteristics for both high and low frequency signals. On both sides of the top of the antenna body 1, there is an independent metal patch 3 separated from the antenna body.

[0055] In this embodiment, a slotted portion is provided on the antenna body 1. Figure 1 and Figure 3 As shown, two obliquely arranged elliptical slot lines 4 are respectively provided on both sides of the antenna body 1 to change the current distribution, thereby improving the antenna radiation performance.

[0056] In this embodiment, the feeding part specifically includes: Figure 2 As shown, the coaxial feed line is fed into the feeding structure of the backplane through an SMA connector (i.e., an SMA RF connector), and the signal is fed into two radiating disks 7 through a one-to-two power divider. The radiating disks 7 then feed the energy into the exponential gradient gap (exponential gradient structure 2) of the antenna body 1, and finally diffuse into the free space through the gap radiation, thereby realizing the reception and transmission of ground penetrating radar antenna signals.

[0057] Step 2: Lumped resistance loading like Figure 3 As shown, a 100 ohm lumped resistor 6 is added to the connection between the antenna body 1 and the independent metal patch 3 on the top. By loading the lumped resistor 6, the reflection of the current at the end of the antenna is weakened, the impedance matching of the antenna in the low frequency band is improved, and the ringing effect of the antenna is reduced.

[0058] Step 3: Loading the metal sheet 5: Loading the metal sheet 5 on the bottom side of the antenna body 1: like Figure 1 As shown, four metal sheets 5 are fixed on both sides of the antenna body 1; thus, the impedance matching of the antenna in the low frequency band is improved.

[0059] The top metal patch 3 of the antenna body 1 is loaded Attached Figure 1 In the embodiment, four additional metal patches 3 are added to the two independent metal patches 3 on the top for loading. By bending downward, the length of the top radiation patch is increased without increasing the height of the antenna, thereby improving the impedance matching of the antenna in the low frequency band.

[0060] Regarding the antenna port reflection coefficient of the Vivaldi ground penetrating radar antenna provided in this embodiment: like Figure 4 As shown, Figure 4 is the reflection coefficient of the antenna port. The Vivaldi ground penetrating radar antenna proposed in this embodiment, that is, the horn antenna has a reflection coefficient of less than -6dB in the frequency range of 100MHz-1800MHz, and a bandwidth of about 18:1, achieving ultra-wideband performance.

[0061] In this embodiment, combined with Figures 5 to 9 , Figures 5 to 9 They are the directional diagrams of the antenna at the frequencies of 100 MHz, 500 MHz, 1000 MHz, 1500 MHz and 1800 MHz respectively; it can be seen that the Vivaldi ground penetrating radar antenna provided in this embodiment maintains good unidirectional radiation performance within the ultra-wideband operating frequency band.

[0062] like Fig.10 As shown, Fig.10 It is the test result of antenna time domain performance. The four lines in the figure are the electric field strength at 50cm, 100cm, 150cm and 200cm in the normal direction of the antenna. The Vivaldi ground penetrating radar antenna provided in this embodiment receives a Gaussian pulse signal as a receiving antenna. It can be seen that the main pulse waveform of the received signal in the time domain is clear, and the shape of the original Gaussian pulse main waveform is basically maintained, while the tail decays rapidly; it is enough to show that the Vivaldi ground penetrating radar antenna provided in this embodiment has good time domain performance.

[0063] In summary, the present invention provides a Vivaldi ground penetrating radar antenna and a method of using the same, which has the following advantages over existing radar antennas: First, the present invention adopts the Vivaldi antenna form to achieve the performance of an ultra-wideband pulse antenna, and the overall structure is relatively firm and stable.

[0064] Secondly, the present invention enhances the low-frequency radiation characteristics of the antenna by adding an additional metal patch on the top as a radiation patch.

[0065] Thirdly, the low-frequency impedance matching performance of the antenna is improved by loading the lumped resistor and the additional metal loading.

[0066] The Vivaldi antenna of the present invention has an impedance matching bandwidth exceeding 18:1, has a low profile within the working frequency band, and has a stable phase center, good fidelity for received signals, and a compact and stable entire structure, and has good application prospects in the field of ground penetrating radar.

[0067] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A Vivaldi ground penetrating radar antenna, characterized in that: It comprises an antenna body (1); Two groups of exponential gradient structures (2) are arranged on the antenna body (1) from the feeding point to the top of the antenna body (1); The two groups of exponential gradient structures (2) are respectively connected to the feeding structure of the antenna body (1).

2. The Vivaldi ground penetrating radar antenna according to claim 1, characterized in that: Slot lines (4) for increasing the working bandwidth of the antenna are respectively provided on both sides of the antenna body (1).

3. The Vivaldi ground penetrating radar antenna according to claim 2, characterized in that: The slot lines (4) are elliptical in shape; the slot lines (4) on both sides of the antenna body (1) are symmetrically arranged and are both arranged obliquely.

4. The Vivaldi ground penetrating radar antenna according to claim 1, characterized in that: Metal patches (3) are provided on both sides of the top of the antenna body (1).

5. The Vivaldi ground penetrating radar antenna according to claim 4, characterized in that: Lumped resistors (6) are respectively arranged on both sides of the top of the antenna body (1); the metal patch (3) is connected to the antenna body (1) via the lumped resistors (6); and the metal patch (3) is fixed to both sides of the top of the antenna body (1) in a bending manner.

6. The Vivaldi ground penetrating radar antenna according to any one of claims 1 to 5, characterized in that: Metal sheets (5) for improving impedance matching in the low frequency band of the antenna are arranged respectively from both sides of the antenna body (1) to the bottom of the antenna body (1).

7. The Vivaldi ground penetrating radar antenna according to any one of claim 6, characterized in that: The metal sheets (5) are four in number, two in each group, and the two groups are symmetrically arranged; the two in each group are correspondingly arranged on the front and back sides of the antenna body (1).

8. The Vivaldi ground penetrating radar antenna according to claim 1, characterized in that: The feeding structure comprises two radiation disks (7) arranged on the back plate of the antenna body (1) and a one-to-two microstrip line power divider.

9. The Vivaldi ground penetrating radar antenna according to claim 9, characterized in that: The coaxial feed line is connected to the two radiation disks (7) via an SMA connector and a one-to-two microstrip line power divider.

10. A method for using a Vivaldi ground penetrating radar antenna, characterized in that: The Vivaldi ground penetrating radar antenna according to any one of claims 1 to 9, comprising: The signal is fed into the feeding structure using a coaxial feed line; The energy is fed into the antenna body by the feeding structure; Finally, the structure consisting of the antenna body and two sets of exponentially tapered structures (2) diffuses the energy into free space.

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