Low-frequency jamming antennas, antenna systems and UAV jamming equipment

Abstract

This application discloses a low-frequency jamming antenna, an antenna system, and a UAV jamming device, belonging to the field of UAV jamming. The low-frequency jamming antenna includes a radiating component and a reflecting component. The reflecting component includes a first reflecting body and a second reflecting body. The first reflecting body is a rectangular box-shaped metal structure, and the second reflecting body is a flat plate-shaped metal structure. The second reflecting body is disposed above the first reflecting body, and one side of the second reflecting body is embedded into the first reflecting body at a preset embedding depth, so that the low-frequency jamming antenna forms a through-array structure along a preset direction. The radiating component is disposed inside the first reflecting body, and the bottom of the radiating component contacts the inner wall of the first reflecting body. The UAV jamming device deploying the low-frequency jamming antenna of this application completely covers low-frequency interference signals. Furthermore, the low-frequency jamming antenna of this application can act as a reflective substrate for a high-frequency array antenna, realizing a conformal design of the overall antenna array and space reuse of the antenna array.

Description

Technical Field

[0001] This invention relates to the field of drone jamming, specifically to a low-frequency jamming antenna, antenna system, and drone jamming equipment. Background Technology

[0002] As drone technology rapidly advances towards miniaturization, swarming, and autonomy, counter-drone technology systems are also showing significant technological advancements. Within these systems, jamming antennas, serving as the core front-end component for suppressing drone navigation, image transmission, and remote control signals, and for deception, are evolving from simple, wide-beam, low-gain, and fixed-frequency jamming methods to intelligent jamming with high precision, fast response, and multi-mode coordination. Jamming antennas are shifting from discrete omnidirectional or sector-based coverage to narrow-beam, high-gain, and low-sidelobe directional array antennas to improve the energy convergence efficiency in the target direction while reducing unnecessary radiation to other equipment and the surrounding environment. Simultaneously, with the increasing power of drone jamming devices, jamming antennas are evolving from traditional helical and log-periodic antennas towards high-voltage-resistant, compact, full-band integrated array antennas. In addition, to adapt to different platforms such as vehicle-mounted, handheld, tethered, and fixed stations, jamming antennas are evolving towards low profile, lightweight, and conformal integration. This requires anti-drone jamming antennas to not only meet performance specifications but also have the ability to adapt to multiple platforms and vehicles.

[0003] Currently, anti-drone jamming antennas need to cover frequency bands such as satellite navigation, uplink, and image transmission links to achieve jamming effects. Commercial drones typically have signal frequencies concentrated in the 300MHz to 6000MHz range, and jamming antennas mainly cover specific fundamental frequency bands such as 915MHz, 1.5GHz, 2.4GHz, and 5.8GHz. However, other drone frequencies exist in actual anti-drone scenarios, such as extended bands like 1.2GHz and 4.9GHz. Furthermore, for long-range remotely controlled drones and special-purpose drones, the 315MHz and 433MHz bands are also used for long-range remote control and data jamming due to their strong diffraction capabilities and low signal attenuation. Therefore, jamming antennas that only cover specific fundamental frequency bands cannot effectively jam all types of drones. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a low-frequency interference antenna, antenna system and UAV jamming device to solve the problem of difficulty in jamming all types of UAVs.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, this application provides a low-frequency interference antenna, including a radiating component and a reflecting component, wherein the reflecting component includes a first reflecting body and a second reflecting body; The first reflective element is a rectangular box-shaped metal structure, and the second reflective element is a flat plate-shaped metal structure; The second reflector is positioned above the first reflector, and one side of the second reflector is embedded into the first reflector at a preset embedding depth, so that the low-frequency interference antenna forms a through-array structure along a preset direction. The radiation component is disposed inside the first reflective body, and the bottom of the radiation component is in contact with the inner wall of the first reflective body; Reflective components are used to generate multi-band resonances in the 300MHz to 1000MHz frequency range; The first reflector body serves as the reflector base plate for the radiation assembly; The second reflector is used to fix the high-frequency array antenna and act as a reflector base plate for the high-frequency array antenna.

[0006] In the embodiments of this application, the radiation component includes four radiation units; The four radiating elements are distributed in a rotationally symmetrical manner around the center point of the radiating assembly; A radiating unit is used to radiate or receive radio waves.

[0007] In the embodiments of this application, the radiating unit includes a first planar structure, a second planar structure, a third planar structure, a fourth planar structure, and a fifth planar structure, all of which are polygonal flat plate structures. The first planar structure is fixed to the reflective component, and the first planar structure is used as the bottom layer of the radiating unit; The second planar structure extends from one edge of the first planar structure at a 90-degree angle to form a polygonal flat plate that is perpendicular to the first planar structure. The third planar structure extends from one edge of the second planar structure at a 90-degree angle to form a polygonal flat plate that is horizontally arranged with the first planar structure, and the first planar structure and the third flat plate structure are arranged perpendicular to the second planar structure in the same direction. The fourth planar structure extends from one edge of the third planar structure at a 90-degree angle to form a polygonal plate that is perpendicular to the first planar structure; The fifth planar structure extends from one edge of the fourth planar structure at a 90-degree angle to form a polygonal flat plate perpendicular to the first planar structure, and the second, fourth, and fifth planar structures are perpendicular to the third planar structure in the same direction.

[0008] In embodiments of this application, the radiation component further includes a limiting plate; The limiting plate is a circular ring structure, and the limiting plate is mechanically fixed to the third plane structure. The four radiation units are evenly distributed along the circumference of the limiting plate.

[0009] In embodiments of this application, the radiating component further includes a radio frequency coaxial cable; The outer core of the radio frequency coaxial cable is welded to the first target radiating unit, and the inner core of the radio frequency coaxial cable is welded to the second target radiating unit. The first target radiating unit and the second target radiating unit are radiating units that are rotationally symmetrically distributed around the center point of the radiating component.

[0010] In embodiments of this application, the radiation assembly further includes a fixed base plate; The base plate is fixed to the first reflective body so that the base plate serves as the bottom layer of the radiation assembly; Each radiating unit is fixed to a base plate.

[0011] In the embodiments of this application, the first reflective body includes a U-shaped base plate and two irregular side plates of different heights; Each irregular side panel is located at the side end of the U-shaped base plate.

[0012] In embodiments of this application, the reflective component further includes at least one fastener; The fastener is vertically positioned between the first reflective body and the second reflective body; Fasteners are used to mechanically secure the first reflector body and the second reflector body.

[0013] Secondly, this application provides an antenna system including a high-frequency array antenna and the aforementioned low-frequency interference antenna, wherein the high-frequency array antenna includes at least two high-frequency antennas; The low-frequency interference antenna and the high-frequency array antenna are stacked together, and the high-frequency array antenna is fixed to the reflective component of the low-frequency interference antenna so that the reflective component can act as the reflective base plate of the high-frequency array antenna. High-frequency array antennas are used to generate multi-band resonances in the 1000MHz to 6000MHz frequency range.

[0014] Thirdly, this application provides a drone jamming device, including the antenna system described above.

[0015] Therefore, this application provides a low-frequency interference antenna, including a radiating component and a reflecting component. The reflecting component includes a first reflecting body and a second reflecting body. The first reflecting body is a rectangular box-shaped metal structure, and the second reflecting body is a flat metal structure. The second reflecting body is disposed above the first reflecting body, and one side of the second reflecting body is embedded in the first reflecting body at a preset embedding depth, so that the low-frequency interference antenna forms a through-array structure along a preset direction. The radiating component is disposed inside the first reflecting body, and the bottom of the radiating component is in contact with the inner wall of the first reflecting body. The reflecting component is used to generate multi-band resonance in the 300MHz to 1000MHz frequency band. The first reflecting body is used to act as a reflecting base plate for the radiating component. The second reflecting body is used to fix a high-frequency array antenna, thereby acting as a reflecting base plate for the high-frequency array antenna.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The low-frequency interference antenna of this application can generate multi-band resonance in the 300MHz to 1000MHz frequency band, thereby enabling the UAV jamming equipment that deploys the low-frequency interference antenna of this application to fully cover the low-frequency interference signal.

[0017] Furthermore, the low-frequency interference antenna of this application can serve as a reflective substrate for a high-frequency array antenna, thereby enabling the assembly of a highly integrated spatially multiplexed antenna array and achieving a conformal design for the overall antenna array.

[0018] When the high-frequency array antenna of this application is fixed to the second reflector, it can interfere with all types of UAVs through the high-frequency array antenna and the low-frequency interference antenna. The reflector component and the high-frequency array antenna share the second reflector, eliminating the need for an additional reflector base plate and achieving space reuse of the antenna array. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a top view of the structure of a low-frequency interference antenna according to an embodiment of the present invention; Figure 2 This is a side view of the structure of a radiating unit according to an embodiment of the present invention; Figure 3 This is a top view of the structure of a radiating unit according to an embodiment of the present invention; Figure 4 This is a side view of the structure of a low-frequency interference antenna according to an embodiment of the present invention; Figure 5 This is a structural side view of the first reflective body according to an embodiment of the present invention; Figure 6This is a structural diagram of an antenna system according to an embodiment of the present invention; Figure 7 This is a top view of the antenna system according to an embodiment of the present invention; Figure 8 This is a structural side view of an antenna system according to an embodiment of the present invention; Figure 9 This is a top view of the structure of a high-frequency array antenna according to an embodiment of the present invention; Figure 10 This is the port return loss of a low-frequency interference antenna according to an embodiment of the present invention; Figure 11 This is a radiation pattern of a low-frequency interference antenna at a frequency of 315MHz according to an embodiment of the present invention; Figure 12 This is a radiation pattern of a low-frequency interference antenna according to an embodiment of the present invention at a frequency of 433MHz; Figure 13 This is a radiation pattern of a low-frequency interference antenna according to an embodiment of the present invention at a frequency of 840MHz; Figure 14 This is a radiation pattern of a low-frequency interference antenna according to an embodiment of the present invention at a frequency of 915MHz; Figure 15 This is the port return loss of a first high-frequency antenna according to an embodiment of the present invention; Figure 16 This is the radiation pattern of a first high-frequency antenna at a frequency of 3500MHz according to an embodiment of the present invention; Figure 17 This is the radiation pattern of a first high-frequency antenna in one embodiment of the present invention at a frequency of 4900MHz; Figure 18 This is the port return loss of the second high-frequency antenna in one embodiment of the present invention; Figure 19 This is the radiation pattern of the second high-frequency antenna at 5200MHz, according to one embodiment of the present invention. Figure 20 This is the radiation pattern of the second high-frequency antenna at 5800MHz, according to one embodiment of the present invention. Figure 21 This is the port return loss of the third high-frequency antenna in one embodiment of the present invention; Figure 22 This is the radiation pattern of the third high-frequency antenna of one embodiment of the present invention at a frequency of 2450MHz; Figure 23 This is the port return loss of the fourth high-frequency antenna in one embodiment of the present invention; Figure 24 This is the radiation pattern of the fourth high-frequency antenna of one embodiment of the present invention at a frequency of 1200MHz; Figure 25 This is the radiation pattern of the fourth high-frequency antenna of one embodiment of the present invention at a frequency of 1430MHz; Figure 26 This is the radiation pattern of the fourth high-frequency antenna in one embodiment of the present invention at a frequency of 1575MHz.

[0020] In the figure's reference numerals 1-Antenna system; 10-Low-frequency interference antenna; 20-High-frequency array antenna; 11-Radiating component; 12-Reflecting component; 21-First high-frequency antenna; 22-Second high-frequency antenna; 23-Third high-frequency antenna; 24-Fourth high-frequency antenna; 111-First radiating element; 112-Second radiating element; 113-Third radiating element; 114-Fourth radiating element; 115-Limiting plate; 116-RF coaxial cable; 121-First reflector body; 122-Second reflector body; 123-Fastener; 1111-First planar structure; 1112-Second planar structure; 1113-Third planar structure; 1114-Fourth planar structure; 1115-Fifth planar structure; 1211-U-shaped base plate; 1212-Irregular side plate. Detailed Implementation

[0021] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the present invention.

[0022] The components of the embodiments of the invention described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] In the following, the terms “comprising,” “having,” and their cognates, which may be used in various embodiments of the invention, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as excluding, firstly, the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations thereof.

[0024] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0026] While full-band jamming antennas have been proposed, actual antenna systems do not include antenna elements in the 0.3GHz to 1000MHz frequency band. This means the antenna system still lacks the ability to jam low-frequency drone signals such as 300MHz, 433MHz, and 915MHz, leaving vulnerabilities in jamming attacks and unable to support full-band jamming. Jamming antennas typically consist of arrays of multiple narrowband antennas, covering most of the fundamental frequency band. However, because the frequency interference range of narrowband antennas is relatively fixed, blind spots appear in the interference band. This causes anti-drone equipment to experience signal mismatch when facing specific frequencies, unknown frequencies, and various types and models of drones, reducing the link jamming effect and shortening the effective range of the jamming antenna.

[0027] Furthermore, due to the dispersed and wide bandwidth of low-frequency UAV communication bands, low-frequency directional jamming antennas designed to cover the 0.3-1000MHz UAV communication band are often large in size, have low gain, and are difficult to integrate with antennas of other frequency bands. In addition, the array antennas of the jamming antennas are relatively independent, requiring additional reflective base plates to achieve directional radiation, failing to achieve spatial reuse and occupying extra space, increasing the overall weight. Since the additional reflective base plate needs to cover all antennas, the overall shape of the jamming antenna system often adopts a square planar layout with an aspect ratio close to 1:1, resulting in a large vertical span in physical space. When the jamming antenna system is integrated into a mobile vehicle, a large installation space is required in the vertical direction. Additionally, due to the high vertical height, for structural stability, the jamming antenna system can usually only be externally mounted to the side of the vehicle or fixed to a separate chassis via a gimbal, causing spatial interference and affecting the overall integration. Furthermore, the large outer contour makes it difficult to achieve concealed deployment of the antenna, increasing the vehicle's wind resistance.

[0028] Please see Figure 1 , Figure 1 This is a top view of the structure of a low-frequency interference antenna according to an embodiment of the present invention. This application provides a low-frequency interference antenna. Figure 1 The low-frequency interference antenna 10 includes a radiating component 11 and a reflecting component 12. The reflecting component 12 includes a first reflecting body 121 and a second reflecting body 122. The first reflective body 121 is a rectangular box-shaped metal structure, and the second reflective body 122 is a flat plate-shaped metal structure; The second reflector 122 is disposed above the first reflector 121, and one side of the second reflector 122 is embedded into the first reflector 121 based on a preset embedding depth, so that the low-frequency interference antenna 10 forms a through array structure along a preset direction. The radiation component 11 is disposed inside the first reflective body 121, and the bottom of the radiation component 11 is in contact with the inner wall of the first reflective body 121. The reflector component 12 is used to generate multi-band resonance in the 300MHz to 1000MHz frequency band; The first reflective body 121 serves as the reflective base plate of the radiation assembly 11; The second reflector 122 is used to fix the high-frequency array antenna 20 and to act as a reflector base plate for the high-frequency array antenna 20.

[0029] The low-frequency interference antenna 10 includes a radiating component 11 and a reflecting component 12. The reflecting component 12 serves as the bottom support and electromagnetic reflection structure of the low-frequency antenna, used to extend the low-frequency bandwidth and generate multi-band resonance in the 300MHz to 1000MHz frequency band. The first reflecting body 121 contributes to the low-frequency resonance and also acts as the reflecting base plate of the radiating component 11. The second reflecting body 122 is used to fix the high-frequency array antenna 20, acting as the reflecting base plate of the high-frequency array antenna 20, realizing the conformal design of the overall antenna array. The radiating component 11 is disposed inside the first reflecting body 121, and the bottom of the radiating component 11 contacts the inner wall of the first reflecting body 121. For ease of understanding, in the embodiments of this application, the surface of the second reflecting body 122 is configured with a connector interface and mounting feature holes. The mounting feature holes are used for the high-frequency antenna array to be directly mounted to the second reflecting body 122 by support studs, so that the second reflecting body 122 acts as the reflecting base plate of the high-frequency array antenna 20.

[0030] The reflective component 12 includes a first reflective body 121 and a second reflective body 122. The first reflective body 121 is a rectangular box-shaped metal structure located at the bottom layer of the low-frequency interference antenna 10, used to support the radiating component 11 and support directional radiation. The second reflective body 122 is a flat metal structure, disposed above the first reflective body 121, and one side of the second reflective body 122 is embedded into the first reflective body 121 at a preset embedding depth, so that the low-frequency interference antenna 10 forms a through-array structure along a preset direction. The preset embedding depth is set according to actual needs and is not limited here. For ease of understanding, in the embodiment of this application, the preset embedding depth is 40mm. Figure 1As shown, the left side of the second reflective body 122 is embedded into the first reflective body 121 to a depth of 40mm. The embedding depth and gap of the second reflective body 122 affect the coupling effect of the second reflective body 122, which will not be elaborated here.

[0031] In this embodiment, the low-frequency interference antenna 10 includes a radiating component 11 and a reflecting component 12. The low-frequency interference antenna 10 adopts a multi-resonance superposition structure, which can be equivalent to a combination of a radiating antenna body, a parasitic loop dipole, and a capacitively coupled dipole. Based on the multi-resonance principle, the radiating component 11 contributes to high-frequency resonance, and the reflecting component 12 contributes to low-frequency and mid-frequency resonance. The low-frequency interference antenna 10 utilizes the parasitic coupling effect to achieve multi-frequency resonance and extend the operating bandwidth. At the same time, by controlling the induced current distribution on the reflecting component 12, the vector superposition characteristics of the radiation field are used to give the mid- and low-frequency resonances directional radiation characteristics, thereby improving the antenna gain.

[0032] Based on the parasitic coupling mechanism, an induced current is generated on the first reflector 121. Adjusting the size of the first reflector 121 can contribute to low-frequency resonance, thereby forming an equivalent parasitic loop dipole. Simultaneously, by setting the position of the radiating component 11, the direction of the induced current is controlled to create directionality in the radiation at the corresponding low-frequency resonance, thus enhancing low-frequency gain through directional radiation. One side of the second reflector 122 is embedded into the first reflector 121 at a preset embedding depth. Through capacitive coupling, an induced current is generated in the second reflector 122, serving to match impedance and regulate current distribution, contributing a resonant point and forming an equivalent capacitively coupled dipole. Changing the length of the second reflector 122 allows the resonant point to operate in the mid-frequency range.

[0033] This application provides a low-frequency interference antenna 10, including a radiating component 11 and a reflecting component 12. The reflecting component 12 includes a first reflecting body 121 and a second reflecting body 122. The first reflecting body 121 is a rectangular box-shaped metal structure, and the second reflecting body 122 is a flat metal structure. The second reflecting body 122 is disposed above the first reflecting body 121, and one side of the second reflecting body 122 is embedded into the first reflecting body 121 based on a preset embedding depth, so that the low-frequency interference antenna 10 has a through-array structure along a preset direction. The radiating component 11 is disposed inside the first reflecting body 121, and the bottom of the radiating component 11 contacts the inner wall of the first reflecting body 121. The reflecting component 12 is used to generate multi-band resonance in the 300MHz to 1000MHz frequency band. The first reflecting body 121 is used to act as a reflecting base plate of the radiating component 11. The second reflecting body 122 is used to fix a high-frequency array antenna 20, so as to act as a reflecting base plate of the high-frequency array antenna 20. The low-frequency jamming antenna 10 can generate multi-band resonance within the 300MHz to 1000MHz frequency band, thereby enabling the UAV jamming equipment deploying the low-frequency jamming antenna 10 to completely cover low-frequency jamming signals. Furthermore, the low-frequency jamming antenna 10 can serve as a reflector plate for the high-frequency array antenna 20, thus enabling the assembly of a highly integrated, spatially multiplexed antenna array and achieving a conformal design for the overall antenna array. When the high-frequency array antenna 20 is fixed to the second reflector body, jamming of all UAV models can be achieved through both the high-frequency array antenna 20 and the low-frequency jamming antenna 10. Simultaneously, the reflector component 12 shares the second reflector body with the high-frequency array antenna 20, eliminating the need for an additional reflector plate and achieving spatial multiplexing of the antenna array.

[0034] In the embodiments of this application, the radiation component 11 includes four radiation units; The four radiating elements are distributed in a rotationally symmetrical manner around the center point of the radiating assembly 11; A radiating unit is used to radiate or receive radio waves.

[0035] A radiating element is a basic structural unit that constitutes an antenna, capable of effectively radiating or receiving radio waves. The radiating assembly 11 includes four radiating elements, all of which have identical structures and will not be described in detail here. The four radiating elements are distributed in a rotationally symmetrical manner around the center point of the radiating assembly 11. For ease of understanding, in the embodiments of this application, the radiating assembly 11 includes four radiating elements, which are distributed in a cross-shaped rotationally symmetrical manner around the center point of the radiating assembly 11.

[0036] like Figure 1As shown, the four radiation units are the first radiation unit 111, the second radiation unit 112, the third radiation unit 113, and the fourth radiation unit 114. The four radiation units are arranged in a cross-shaped rotational symmetry, that is, the first radiation unit 111 and the third radiation unit 113 are arranged in a rotational symmetry, and the second radiation unit 112 and the fourth radiation unit 114 are arranged in a rotational symmetry.

[0037] Please see Figure 2 , Figure 2 This is a side view of the structure of a radiation unit according to an embodiment of the present invention.

[0038] In the embodiments of this application, the radiating unit includes a first planar structure 1111, a second planar structure 1112, a third planar structure 1113, a fourth planar structure 1114 and a fifth planar structure 1115, and the first planar structure 1111, the second planar structure 1112, the third planar structure 1113, the fourth planar structure 1114 and the fifth planar structure 1115 are all polygonal flat plate structures. The first planar structure 1111 is fixed to the reflective component 12, and the first planar structure 1111 is used as the bottom layer of the radiating unit; The second planar structure 1112 extends from one side edge of the first planar structure 1111 at a 90-degree angle to form a polygonal flat plate that is perpendicular to the first planar structure 1111. The third planar structure 1113 extends from one side edge of the second planar structure 1112 at a 90-degree angle to form a polygonal flat plate that is horizontally arranged with the first planar structure 1111, and the first planar structure 1111 and the third planar structure 1113 are arranged perpendicular to the second planar structure 1112 in the same direction. The fourth planar structure 1114 extends from one edge of the third planar structure 1113 at a 90-degree angle to form a polygonal plate perpendicular to the first planar structure 1111. The fifth planar structure 1115 extends from one edge of the fourth planar structure 1114 at a 90-degree angle to form a polygonal flat plate perpendicular to the first planar structure 1111, and the second planar structure 1112, the fourth planar structure 1114 and the fifth planar structure 1115 are perpendicular to the third planar structure 1113 in the same direction.

[0039] Please see Figure 3 , Figure 3 This is a top view of the structure of a radiation unit according to an embodiment of the present invention.

[0040] Since the four radiating units have identical structures, each radiating unit includes a first planar structure 1111, a second planar structure 1112, a third planar structure 1113, a fourth planar structure 1114, and a fifth planar structure 1115. The first planar structure 1111 is fixed to the reflective component 12. For ease of understanding, in the embodiments of this application, the planar structure included in the first radiating unit 111 is used as an example. The first planar structure 1111 includes at least one threaded hole. The first planar structure 1111 is mechanically fixed to the reflective component 12 through the threaded hole, so that the first planar structure 1111 serves as the bottom of the radiating unit. The second planar structure 1112 extends from one edge of the first planar structure 1111 at a 90-degree angle to form a polygonal plate perpendicular to the first planar structure 1111. For ease of understanding, in the embodiments of this application, the second planar structure 1112 bends upward at a 90-degree angle from the edge of the first planar structure 1111. The second planar structure 1112 is used to support the overall structure of the radiating unit and increase the height of the radiating unit structural components.

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, the third planar structure 1113 is a trapezoidal flat plate structure with a gradually changing width. The third planar structure 1113 extends from one edge of the second planar structure 1112 at a 90-degree angle to form a polygonal flat plate horizontally aligned with the first planar structure 1111. For ease of understanding, in this embodiment, the third planar structure 1113 extends from the upper edge of the second planar structure 1112 at a 90-degree angle to form a structure in which the first planar structure 1111 and the third planar structure 1113 are arranged perpendicularly to the second planar structure 1112 in the same direction. The third planar structure 1113 serves as the top of the radiating component 11.

[0042] The fourth planar structure 1114 extends from one edge of the third planar structure 1113 at a 90-degree angle to form a polygonal plate perpendicular to the first planar structure 1111. For ease of understanding, in the embodiments of this application, the fourth planar structure 1114 extends downwards at a 90-degree angle from one edge of the third planar structure 1113, and the fourth planar structure 1114 is parallel to the second planar structure 1112. The fourth planar structure 1114 is used to extend the low-frequency interference antenna 10 in a three-dimensional direction to reduce the size of the radiating component 11.

[0043] The fifth planar structure 1115 extends from one edge of the fourth planar structure 1114 at a 90-degree angle to form a polygonal plate perpendicular to the first planar structure 1111. For ease of understanding, in the embodiments of this application, the fifth planar structure 1115 extends inward at a 90-degree angle from one edge of the fourth planar structure 1114. The fifth planar structure 1115 is perpendicular to both the first and fourth planar structures, forming a structure in which the second, fourth, and fifth planar structures 1112, 1114, and 1115 are perpendicular to the third planar structure 1113 in the same direction. The fifth planar structure 1115 is used to control the relative states of the planar structures, including the first, second, third, and fourth planar structures 1111 and 1114, thereby improving the structural accuracy of the radiation component 11.

[0044] Based on the half-wave dipole theory and considering the high-frequency range, the specific morphology of the structural components of the radiating unit is determined as follows: Figure 2 and Figure 3 As shown, miniaturization is achieved by reducing the lateral and longitudinal dimensions through bending. The radiating unit includes a first planar structure 1111, a second planar structure 1112, a third planar structure 1113, and a fourth planar structure 1114, the total length of which, when unfolded and laid flat, is close to one wavelength of the center frequency band. The height of the second planar structure 1112 is close to one-quarter of the wavelength of the center frequency band, and will not be described in detail here.

[0045] It is important to understand that the connections between the first planar structure 1111, the second planar structure 1112, the third planar structure 1113, the fourth planar structure 1114, and the fifth planar structure 1115 are all equipped with rounded corners to improve structural strength and reduce electromagnetic field concentration at sharp corners. The structural components of the radiating unit are integrally formed from aluminum alloy sheets through multiple processes such as stamping, bending, drilling, and tapping, ensuring dimensional accuracy and structural consistency.

[0046] In the embodiments of this application, the radiation component 11 further includes a limiting plate 115; The limiting plate 115 has a circular structure and is mechanically fixed to the third plane structure 1113. The four radiation units are evenly distributed along the circumference of the limiting plate 115.

[0047] The limiting plate 115 is a circular structure and is disposed on the top of the radiation assembly 11. In this embodiment, since the third plane structure 1113 is the top of the radiation assembly 11, the third plane structure 1113 is provided with multiple rivet nuts or threaded holes for mechanically fixing the limiting plate 115 to the third plane structure 1113, so that the limiting plate 115 is tightly attached to the upper surface of each radiation unit. The limiting plate 115 is used to limit the position of each radiation unit, preventing the radiation unit from moving or deflecting, thereby improving the radiation signal quality.

[0048] In the embodiments of this application, the radiating component 11 further includes a radio frequency coaxial cable 116; The outer core of the radio frequency coaxial line 116 is welded to the first target radiation unit, and the inner core of the radio frequency coaxial line 116 is welded to the second target radiation unit. The first target radiation unit and the second target radiation unit are radiation units that are rotationally symmetrically distributed around the center point of the radiation component 11.

[0049] The first and second target radiating units are selected according to actual needs and are radiating units that are rotationally symmetrically distributed around the center point of the radiating component 11, and are not limited here. For ease of understanding, in the embodiments of this application, the first target radiating unit is the first radiating unit 111, and the second target radiating unit is the fourth radiating unit 114. The outer core of the RF coaxial line 116 is welded to the first target radiating unit, and the inner core of the RF coaxial line 116 is welded to the second target radiating unit. That is, the outer core of the RF coaxial line 116 is welded to the first radiating unit 111, and the inner core of the RF coaxial line 116 is welded to the fourth radiating unit 114, thereby achieving power feeding.

[0050] The RF coaxial cable 116 is used for low-loss, highly shielded transmission of RF signals. The RF coaxial cable 116 can efficiently transmit RF power from the transmitter to the low-frequency interference antenna 10 for radiation, or accurately transmit the weak signal received by the low-frequency interference antenna 10 to the receiver; details will not be elaborated further here.

[0051] In the embodiments of this application, the radiation component 11 further includes a fixed base plate; The base plate is fixed to the first reflective body 121 so that the base plate serves as the bottom layer of the radiation assembly 11; Each radiating unit is fixed to a base plate.

[0052] The base plate is cylindrical in shape, and in this embodiment, it includes threaded holes. The base plate is fixed to the first reflective body 121 via these threaded holes, serving as the bottom layer of the radiation assembly 11. Each radiation unit is fixed to the base plate via these threaded holes. In this embodiment, each radiation unit is fixed above the base plate, and the base plate secures the position of each radiation unit, preventing movement or deflection. Because the base plate is obscured by the first reflective body 121, it is not shown in the figures in this embodiment.

[0053] Please refer to the following: Figure 4 , Figure 4 This is a side view of the structure of a low-frequency interference antenna according to an embodiment of the present invention.

[0054] In the embodiments of this application, the first reflective body 121 includes a U-shaped base plate 1211 and two irregular side plates 1212 of different heights; Each irregular side plate 1212 is located at the side end of the U-shaped base plate 1211.

[0055] The number of irregular side plates 1212 is set according to actual needs and is not limited here. For ease of understanding, in the embodiments of this application, the first reflective body 121 includes a U-shaped base plate 1211 and two irregular side plates 1212 of different heights. Each irregular side plate 1212 is disposed at the side end of the U-shaped base plate 1211, so that the first reflective body 121 has a rectangular box-shaped structure. It should be understood that the first reflective body 121 can adopt a structure with a single irregular side plate 1212. In this embodiment, a structure with two irregular side plates 1212 of different heights is adopted. The two irregular side plates 1212 are located at both ends of the U-shaped base plate 1211 and have different longitudinal heights to improve the structural strength of the reflective component 12.

[0056] Please refer to the following: Figure 5 , Figure 5 This is a structural side view of the first reflective body according to an embodiment of the present invention.

[0057] Two irregular side plates 1212 are located at both ends of the U-shaped base plate 1211, forming the two arms of the U-shaped base plate 1211. Based on the parasitic coupling mechanism, the two arms of the U-shaped base plate 1211, the first radiating unit 111, and the third radiating unit 113 are arranged. The relative distance between the fourth planar structure 1114 of the first radiating unit 111 and the U-shaped base plate 1211, and the relative distance between the fourth planar structure 1114 of the third radiating unit 113 and the U-shaped base plate 1211 are adjusted so that the near-field electromagnetic waves of the radiating component 11 are coupled to the first reflective body 121 of the reflective component 12, that is, an induced current is generated on the U-shaped base plate 1211. The size of the U-shaped base plate 1211 is adjusted to contribute to the low-frequency resonance, that is, the unfolded electrical length is close to half the wavelength of the corresponding frequency band, thereby forming a set of equivalent parasitic loop dipoles. Simultaneously, the position of the radiating component 11 is offset from the center of the U-shaped base plate 1211 structure. The direction and distance of the offset are determined based on simulation results, which is used to change the current path of the two arms of the U-shaped base plate 1211. By using the asymmetric coupling field to control the direction of the induced current flow on the two arms of the U-shaped base plate 1211, the low-frequency return loss is improved, while the common-mode component of the current in the two arms of the U-shaped base plate 1211 is made to make the differential-mode component of the current in the two arms dominant. This promotes the directionality of the radiation at the corresponding low-frequency resonance, forming directional radiation and improving the low-frequency gain.

[0058] The second reflector 122 is partially embedded in the first reflector 121. Utilizing the gap between the inner sides of the two arms of the U-shaped base plate 1211 and the second reflector 122, an induced current is generated in the second reflector 122 through capacitive coupling, achieving impedance matching and current distribution adjustment, contributing another resonant point to form a capacitively coupled dipole. Changing the length of the second reflector 122 allows the resonant point to operate in the mid-frequency range. The radiation field of the resonant point is superimposed with the radiation field of the U-shaped base plate 1211 in the frequency band to achieve mid-frequency directional radiation, improving the mid-frequency gain. Finally, simulation software is used to further optimize the dimensions of each component of the low-frequency interference antenna 10 until the design requirements are met, thus completing the design of the low-frequency interference antenna 10.

[0059] In embodiments of this application, the reflective component 12 further includes at least one fastener 123; Fastener 123 is vertically disposed between the first reflective body 121 and the second reflective body 122; Fastener 123 is used to mechanically fix the first reflective body 121 and the second reflective body 122.

[0060] like Figure 5 As shown, in this embodiment, the first reflector 121 and the second reflector 122 are connected by two fasteners 123. Specifically, the fasteners 123 are vertically disposed between the first reflector 121 and the second reflector 122 to mechanically fix the first reflector 121 and the second reflector 122. For ease of understanding, in the embodiments of this application, except for the fasteners 123 and the radio frequency coaxial cable 116, the first reflector 121, the second reflector 122, and the radiating element in the low-frequency interference antenna 10 are all made of aluminum alloy.

[0061] Please see Figure 6 , Figure 6 This is a structural diagram of an antenna system according to an embodiment of the present invention. This application also provides an antenna system 1. Figure 6 The antenna system 1 includes a high-frequency array antenna 20 and the aforementioned low-frequency interference antenna 10. The high-frequency array antenna 20 includes at least two high-frequency antennas. The low-frequency interference antenna 10 and the high-frequency array antenna 20 are stacked, and the high-frequency array antenna 20 is fixed to the reflective component 12 of the low-frequency interference antenna 10 so that the reflective component 12 serves as the reflective base plate of the high-frequency array antenna 20. The high-frequency array antenna 20 is used to generate multi-band resonance in the 1000MHz to 6000MHz frequency band.

[0062] Please refer to the following: Figure 7 , Figure 7 This is a top view of the antenna system according to an embodiment of the present invention.

[0063] Antenna system 1 includes a high-frequency array antenna 20 and a low-frequency interference antenna 10. The high-frequency array antenna 20 includes at least two high-frequency antennas, and the low-frequency interference antenna 10 includes a radiating component 11 and a reflecting component 12. The overall structure of antenna system 1 is in a stacked layout, with the low-frequency interference antenna 10 and the high-frequency array antenna 20 stacked together. The high-frequency array antenna 20 is fixed to the reflecting component 12 of the low-frequency interference antenna 10, so that the reflecting component 12 serves as the reflecting base plate of the high-frequency array antenna 20.

[0064] Please refer to the following: Figure 8 , Figure 8 This is a structural side view of an antenna system according to an embodiment of the present invention.

[0065] The low-frequency jamming antenna 10 is used to generate multi-band resonance in the 300MHz to 1000MHz frequency band, and the high-frequency array antenna 20 is used to generate multi-band resonance in the 1000MHz to 6000MHz frequency band, so that the antenna system 1 can carry out strike jamming on UAVs in the full frequency band from 300MHz to 6000MHz.

[0066] Please refer to the following: Figure 9 , Figure 9 This is a top view of the structure of a high-frequency array antenna according to an embodiment of the present invention.

[0067] It should be understood that the number of high-frequency antennas is set according to actual needs and is not limited here. For ease of understanding, in the embodiments of this application, the high-frequency array antenna 20 includes four high-frequency antennas, namely, the high-frequency array antenna 20 includes a first high-frequency antenna 21, a second high-frequency antenna 22, a third high-frequency antenna 23, and a fourth high-frequency antenna 24.

[0068] By using a portion of the structure in the low-frequency jamming antenna 10 as the reflector base plate for the high-frequency array antenna 20, a conformal design for the overall array of the antenna system 1 is achieved, realizing spatial multiplexing of the overall array of the antenna system 1. Spatial multiplexing significantly reduces the space occupied by the antenna system 1 in a specific direction and lowers the overall height. The compact and flat geometry of the antenna system 1 allows it to flexibly adapt to various narrow and special spaces. The antenna system 1 can be flexibly installed in the gaps, structural cavities, and clamps of various UAV jamming devices, and can be applied to a variety of different UAV jamming devices.

[0069] This application also provides a drone jamming device, including the antenna system 1 described above.

[0070] The type of drone jamming equipment is determined based on actual needs and can be an unmanned platform or a radar vehicle, etc., without limitation here. Antenna system 1 is compact, flat, and flexible, adaptable to various small and special spaces. For example, antenna system 1 can be installed above the roof rack, in the suspension space under the chassis, or in the mezzanine of the radar vehicle deployment platform, which will not be elaborated here.

[0071] Please see Figure 10 , Figure 10 This is the port return loss of a low-frequency interference antenna according to an embodiment of the present invention.

[0072] Antenna system 1 includes a high-frequency array antenna 20 and a low-frequency interference antenna 10, such as Figure 10 As shown, the S11 values ​​of the low-frequency interference antenna in the three frequency bands of 300MHz to 320MHz, 420MHz to 470MHz, and 700MHz to 960MHz are all less than -10dB, indicating that the port matching of the low-frequency interference antenna 10 is good. In the frequency range of 300MHz to 1000MHz, the overall S11 is less than -6dB, and the S11 value is less than -10dB in most frequency bands, indicating that the low-frequency interference antenna 10 in this embodiment exhibits broadband operation capability and can work normally over a wide frequency range.

[0073] Please see Figure 11 , Figure 11 This is a radiation pattern of a low-frequency interference antenna at a frequency of 315MHz according to an embodiment of the present invention.

[0074] like Figure 11 As shown, the gain of the low-frequency interference antenna 10 reaches 3.1dB, which is higher than the gain level of about 2dB of the existing typical omnidirectional antenna. It exhibits a specific directionality of radiation, indicating that the differential mode component of the induced current in the two arms of the U-shaped base plate 1211 of the low-frequency interference antenna 10 begins to dominate, forming a directional radiation effect.

[0075] Please see Figure 12 , Figure 12 This is a radiation pattern of a low-frequency interference antenna at a frequency of 433MHz, according to an embodiment of the present invention.

[0076] like Figure 12 As shown, the low-frequency interference antenna 10 achieves a gain of 3.7dB at a frequency of 433MHz, and the antenna exhibits good directional radiation characteristics.

[0077] Please see Figure 13 , Figure 13 This is a radiation pattern of a low-frequency interference antenna at 840MHz, according to an embodiment of the present invention.

[0078] Please see Figure 14 , Figure 14 This is a radiation pattern of a low-frequency interference antenna at a frequency of 915MHz according to an embodiment of the present invention.

[0079] like Figure 13 and Figure 14 As shown, the antenna exhibits directional radiation characteristics, and its gain level further increases with the frequency band, reaching 6.8 dB at 915 MHz. Therefore, in this embodiment, the low-frequency interference antenna 10 can cover the low-frequency UAV communication frequency band and effectively transmit full-band interference signals, meeting the low-frequency anti-interference requirements.

[0080] The high-frequency array antenna 20 includes at least two high-frequency antennas. For ease of understanding, in the embodiments of this application, the high-frequency array antenna 20 includes a first high-frequency antenna 21, a second high-frequency antenna 22, a third high-frequency antenna 23, and a fourth high-frequency antenna 24. The first high-frequency antenna 21 operates in the frequency band of 3200MHz to 5000MHz, the second high-frequency antenna 22 operates in the frequency band of 5000MHz to 6000MHz, the third high-frequency antenna 23 operates in the frequency band of 1800MHz to 3200MHz, and the fourth high-frequency antenna 24 operates in the frequency band of 1000MHz to 1800MHz, thereby achieving frequency band coverage from 1000MHz to 6000MHz.

[0081] Please see Figure 15 , Figure 15 This refers to the port return loss of a first high-frequency antenna according to an embodiment of the present invention.

[0082] Please see Figure 16 , Figure 16 This is the radiation pattern of a first high-frequency antenna at a frequency of 3500MHz, according to an embodiment of the present invention.

[0083] Please see Figure 17 , Figure 17 This is the radiation pattern of a first high-frequency antenna at a frequency of 4900MHz, according to an embodiment of the present invention.

[0084] For ease of understanding, in the embodiments of this application, the first high-frequency antenna 21 includes an antenna radiating element of 3200MHz to 5000MHz, a fixing stud, and an RF connector, capable of radiating electromagnetic waves of 3200MHz to 5000MHz. The antenna radiating element is a low-loss PCB (Printed Circuit Board). The radiating element is fixed to the second reflector body 122 by the fixing stud. The RF connector is a coaxial cable.

[0085] like Figure 17As shown, the first high-frequency antenna 21 has a gain of 12.7dB at 3500MHz and a gain of 13.9dB at 4900MHz, which meets the requirements for directional radiation. At the same time, the port return loss S11 parameter of the first high-frequency antenna 21 is less than -10dB, indicating that the first high-frequency antenna 21 can work normally within the preset frequency band and has the function of transmitting multi-band anti-drone signals from 3200MHz to 5000MHz.

[0086] Please see Figure 18 , Figure 18 This is the port return loss of the second high-frequency antenna in one embodiment of the present invention.

[0087] Please see Figure 19 , Figure 19 This is the radiation pattern of the second high-frequency antenna at a frequency of 5200MHz, according to an embodiment of the present invention.

[0088] Please see Figure 20 , Figure 20 This is the radiation pattern of the second high-frequency antenna at 5800MHz, according to an embodiment of the present invention.

[0089] For ease of understanding, in the embodiments of this application, the first high-frequency antenna 21 includes an antenna radiating element of 5000MHz to 6000MHz, an antenna base plate, an RF connector, fixing studs, and multiple metal discs. A rivet nut is provided at the center of the rectangular area of ​​the radiating element, and the bottom of the rivet nut is connected to the antenna base plate. The radiating element is parallel to the antenna base plate. Multiple loading metal discs are disposed above the radiating element, with rivet nuts positioned at the center of each loading metal disc. The bottom of the rivet nut is connected to the radiating element. The loading metal discs are parallel to the radiating element, and their size is adapted to the rectangular area of ​​the radiating element. The center of the loading metal disc is aligned with the center of the rectangular area. The outer area of ​​the antenna base plate is fixed to the second reflector body 122 by fixing studs. The RF connector is a coaxial cable.

[0090] like Figure 19 and Figure 20 As shown, the gain of the second high-frequency antenna 22 reaches the highest level. The gain of the second high-frequency antenna 22 is 13.4dB at the 5200MHz frequency point and 14.4dB at the 5800MHz frequency point, indicating that the second high-frequency antenna 22 can work normally within the preset frequency band and has the function of transmitting multi-band anti-drone signals within the range of 5000MHz to 6000MHz.

[0091] Please see Figure 21 , Figure 21 This is the port return loss of the third high-frequency antenna in one embodiment of the present invention.

[0092] Please see Figure 22 , Figure 22 This is the radiation pattern of the third high-frequency antenna at 2450MHz, according to an embodiment of the present invention.

[0093] For ease of understanding, the third high-frequency antenna 23 in the embodiments of this application includes an antenna radiating element (1800MHz to 3200MHz), a directing element, fixing studs, and an RF connector. The third high-frequency antenna 23 has a two-layer structure, with the radiating element located on the lower layer and the directing element on the upper layer. Both the radiating element and the directing element are low-loss PCBs. The directing element is supported above the radiating element by fixing studs, and the radiating element is fixed to the second reflector body 122 by fixing studs. The RF connector is a coaxial cable.

[0094] like Figure 22 As shown, the third high-frequency antenna 23 has a gain of 13dB at 2450MHz, which meets the high gain requirement. At the same time, the impedance matching within the frequency band is relatively good, indicating that the third high-frequency antenna 23 can work normally within the preset frequency band and has the function of transmitting multi-band anti-drone interference signals from 1800MHz to 3200MHz.

[0095] Please see Figure 23 , Figure 23 This is the port return loss of the fourth high-frequency antenna in one embodiment of the present invention.

[0096] Please see Figure 24 , Figure 24 This is the radiation pattern of the fourth high-frequency antenna in one embodiment of the present invention at a frequency of 1200MHz.

[0097] Please see Figure 25 , Figure 25 This is the radiation pattern of the fourth high-frequency antenna in one embodiment of the present invention at a frequency of 1430MHz.

[0098] Please see Figure 26 , Figure 26 This is the radiation pattern of the fourth high-frequency antenna in one embodiment of the present invention at a frequency of 1575MHz.

[0099] For ease of understanding, in the embodiments of this application, the fourth high-frequency antenna 24 includes an antenna radiating element of 1000MHz to 1800MHz, fixing studs, and an RF connector. The outer area of ​​the antenna base plate is fixed to the second reflector body 122 by fixing studs, and the RF connector is a coaxial cable.

[0100] like Figures 24 to 26As shown, the fourth high-frequency antenna 24 has a gain greater than 8.8dB at 1200MHz, 1430MHz and 1575MHz, which meets the requirements for directional radiation. At the same time, the port return loss S11 parameter is basically less than -10dB, realizing the effect of broadband high-gain antenna, and has the function of transmitting multi-band anti-drone interference signals within 1000MHz to 1800MHz.

[0101] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

Claims

1. A low-frequency interference antenna, characterized in that, It includes a radiation component and a reflection component, wherein the reflection component includes a first reflection body and a second reflection body; The first reflective body is a rectangular box-shaped metal structure, and the second reflective body is a flat plate-shaped metal structure; The second reflective body is disposed above the first reflective body, and one side of the second reflective body is embedded into the first reflective body based on a preset embedding depth, so that the low-frequency interference antenna forms a through array structure along a preset direction; The radiation component is disposed inside the first reflective body, and the bottom of the radiation component is in contact with the inner wall of the first reflective body; The reflective component is used to generate multi-band resonance in the 300MHz to 1000MHz frequency band; The first reflective body serves as the reflective base plate of the radiation assembly; The second reflector is used to fix the high-frequency array antenna to serve as the reflector base plate of the high-frequency array antenna.

2. The low-frequency interference antenna according to claim 1, characterized in that, The radiation assembly includes four radiation units; The four radiating elements are distributed in a rotationally symmetrical manner around the center point of the radiating assembly; The radiating unit is used to radiate or receive radio waves.

3. The low-frequency interference antenna according to claim 2, characterized in that, The radiating unit includes a first planar structure, a second planar structure, a third planar structure, a fourth planar structure, and a fifth planar structure, wherein the first planar structure, the second planar structure, the third planar structure, the fourth planar structure, and the fifth planar structure are all polygonal flat plate structures; The first planar structure is fixed to the reflective component, and the first planar structure is used as the bottom layer of the radiating unit; The second planar structure extends from one edge of the first planar structure at a 90-degree angle to form a polygonal plate perpendicular to the first planar structure; The third planar structure extends from one edge of the second planar structure at a 90-degree angle to form a polygonal flat plate that is horizontally arranged with the first planar structure, and the first planar structure and the third flat plate structure are arranged perpendicular to the second planar structure in the same direction. The fourth planar structure extends from one edge of the third planar structure at a 90-degree angle to form a polygonal flat plate that is perpendicular to the first planar structure. The fifth planar structure extends from one edge of the fourth planar structure at a 90-degree angle to form a polygonal flat plate perpendicular to the first planar structure, and the second planar structure, the fourth planar structure, and the fifth planar structure are perpendicular to the third planar structure in the same direction.

4. The low-frequency interference antenna according to claim 3, characterized in that, The radiation assembly also includes a limiting plate; The limiting plate is a circular structure, and the limiting plate is mechanically fixed to the third planar structure. The four radiation units are evenly distributed along the circumference of the limiting plate.

5. The low-frequency interference antenna according to claim 2, characterized in that, The radiation assembly also includes a radio frequency coaxial cable; The outer core of the radio frequency coaxial line is welded to the first target radiation unit, and the inner core of the radio frequency coaxial line is welded to the second target radiation unit. The first target radiation unit and the second target radiation unit are radiation units that are rotationally symmetrically distributed around the center point of the radiation component.

6. The low-frequency interference antenna according to claim 2, characterized in that, The radiation assembly also includes a fixed base plate; The fixed base plate is fixed to the first reflective body so that the fixed base plate serves as the bottom layer of the radiation assembly; Each of the radiation units is fixed to the fixed base plate.

7. The low-frequency interference antenna according to claim 1, characterized in that, The first reflective body includes a U-shaped base plate and two irregular side plates of different heights; Each of the irregular side plates is disposed at the side end of the U-shaped base plate.

8. The low-frequency interference antenna according to claim 1, characterized in that, The reflective component also includes at least one fastener; The fastener is vertically disposed between the first reflective body and the second reflective body; The fastener is used to mechanically fix the first reflective body and the second reflective body.

9. An antenna system, characterized in that, The system includes a high-frequency array antenna and a low-frequency interference antenna as described in any one of claims 1 to 7, wherein the high-frequency array antenna comprises at least two high-frequency antennas; The low-frequency interference antenna and the high-frequency array antenna are stacked together, and the high-frequency array antenna is fixed to the reflective component of the low-frequency interference antenna so that the reflective component serves as the reflective base plate of the high-frequency array antenna. High-frequency array antennas are used to generate multi-band resonances in the 1000MHz to 6000MHz frequency range.

10. A drone jamming device, characterized in that, Includes the antenna system as described in claim 9.

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