Antenna device and aircraft countering equipment

Abstract

The utility model discloses an antenna device and aircraft countering equipment, and relates to the technical field of aircraft control. The antenna device comprises a directional antenna assembly which is used for transmitting signals. A first effective coverage angle of projection of a signal emitted by the directional antenna assembly on the first plane is smaller than a second effective coverage angle of projection of the signal on the second plane; the first plane is perpendicular to the second plane, the first plane is parallel to the length direction of the antenna device, and the first plane and the second plane are both perpendicular to the radiating surface of the antenna device. The effective coverage angles of interference signals emitted by the antenna device on the first plane and the second plane are different, so that when the antenna device is applied to aircraft countering equipment, the second plane can be arranged along the edge of a control area, the interference range corresponding to the single aircraft countering equipment can be increased, and the interference efficiency is improved under the condition that the requirement is met. And the number of aircraft countering equipment can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft control, and more particularly, to an antenna device. In addition, the present application also relates to an aircraft countermeasure device comprising the above-mentioned antenna device. BACKGROUND

[0002] At present, with the prevalence of the unmanned aerial vehicle market, more and more "low, slow and small" aircrafts have gradually appeared. For some areas with high confidentiality requirements (such as important government offices), aircrafts are strictly prohibited from approaching, passing through or flying over the airspace. In order to protect the safety of the control area and prevent aircrafts from entering the control area, it is necessary to set up relevant antenna devices to emit relevant jamming signals and realize the control of the control area. However, the antenna in the current countermeasure device will emit strong jamming signals in all directions, which is easy to affect the wireless communication of the nearby area. In view of the above, how to provide an antenna device of a countermeasure device with little influence on the wireless communication of the nearby area is a problem to be solved by the technical personnel in the field at present. CONTENT OF THE INVENTION

[0003] Therefore, the purpose of the embodiments of the present application is to provide an antenna device which can reduce the influence on the wireless communication of the nearby area.

[0004] Another purpose of the embodiments of the present application is to provide an aircraft countermeasure device comprising the above-mentioned antenna device.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0006] An antenna device, comprising a directional antenna assembly, wherein the directional antenna assembly is used for emitting a signal.

[0007] A first effective coverage angle of the signal projected on a first plane is smaller than a second effective coverage angle of the signal projected on a second plane.

[0008] The first plane is perpendicular to the second plane, the first plane is parallel to the length direction of the antenna device, and the first plane and the second plane are both perpendicular to the radiation surface of the antenna device.

[0009] Optionally, the directional antenna assembly comprises:

[0010] A reflecting plate is provided with a mounting frame.

[0011] An antenna is arranged on the mounting frame, and a gap is formed between the antenna and the reflecting plate.

[0012] The antenna is an omnidirectional antenna, and the antenna is located between the radiation surface and the reflecting plate.

[0013] Optionally, along the length of the antenna, at least one end of the antenna is disposed on the housing, and the other end is disposed on the mounting bracket.

[0014] Optionally, the antenna is a cylindrical antenna, and the extension direction of the cylindrical antenna is parallel to the length direction of the radiating surface.

[0015] Optionally, the number of antennas is multiple, and the multiple antennas are spaced apart in the width direction of the reflector.

[0016] Optionally, the mounting bracket includes:

[0017] A connecting substrate for connecting to the reflector;

[0018] A clamping part is disposed on the side of the connecting substrate facing away from the reflector, and the clamping part is used to clamp the antenna;

[0019] A support portion, one end of which is connected to the connecting substrate and the other end of which is connected to the clamping portion.

[0020] Optionally, at least one of the clamping portion and the supporting portion is an insulating elastic element.

[0021] Optionally, the clamping part has an opening facing the radiating surface, and the two sides of the opening of the clamping part are elastic structures.

[0022] Optionally, the distance between the center of the antenna's cross-section and the reflector is (1 / 4)*λ, where λ is the wavelength of the frequency band corresponding to the signal emitted by the antenna.

[0023] Optionally, the outer casing includes an outer casing, a first end cover, and a second end cover, wherein the first end cover and the second end cover are respectively disposed at both ends of the outer casing along its length, and one end of the antenna is disposed at one of the first end cover and the second end cover;

[0024] The reflector, the mounting bracket, and the antenna are located within the space formed by the housing, the first end cover, and the second end cover.

[0025] An aircraft countermeasure device, the aircraft countermeasure device comprising the antenna device described in any of the preceding claims.

[0026] Optionally, the aircraft countermeasure device further includes an installation device and a fixing device; the antenna device is rotatably mounted on the fixing device via the installation device.

[0027] When using the antenna device provided in the embodiments of this application, the first effective coverage angle of the signal projected on the first plane by the directional antenna assembly is smaller than the second effective coverage angle of the signal projected on the second plane. The first plane is perpendicular to the second plane, that is, the signal has a narrow coverage range in one direction and a wide coverage range in another direction. This signal can form an effect similar to a signal wall. Therefore, when the antenna assembly proposed in the embodiments of this application is placed on the boundary of the controlled area, it can prevent aircraft from entering the controlled area while avoiding the emission of strong interference signals in all directions, thereby achieving the effect of reducing the impact on nearby wireless communication.

[0028] Furthermore, since the effective coverage angles of the signals emitted by this antenna device are different on the first and second planes, when applied to aircraft countermeasures equipment, the second plane can be positioned along the edge of the controlled area, which helps to increase the interference range corresponding to a single aircraft countermeasure device. Under the condition that requirements are met, it can also effectively reduce the number of aircraft countermeasures devices. In addition, this application embodiment also provides an aircraft countermeasures device including the above-described antenna device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the appearance of a specific embodiment of the antenna device provided in this application.

[0031] Figure 2 for Figure 1 A schematic diagram of the first effective coverage angle of the signal emitted by the provided antenna device in the first plane.

[0032] Figure 3 This is a simulation diagram of the radiation effect of a signal on the first plane.

[0033] Figure 4 for Figure 1 A schematic diagram of the second effective coverage angle of the signal emitted by the provided antenna device in the second plane.

[0034] Figure 5 This is a simulation diagram illustrating the radiation effect of a signal on the second plane.

[0035] Figure 6 This is an exploded view of the antenna device provided in the embodiments of this application.

[0036] Figure 7 for Figure 1 A schematic diagram of the directional antenna assembly within the antenna device shown.

[0037] Figure 8 for Figure 7 The diagram shows the structure of the mounting bracket in the directional antenna assembly.

[0038] Figure 9 This is a schematic diagram of a specific embodiment of the aircraft countermeasure device provided in this application.

[0039] Explanation of icon numbers:

[0040] 100 is an antenna device;

[0041] 100a is the outer shell; 100a1 is the radiating surface; 110 is the first end cap; 120 is the outer shell; 130 is the second end cap;

[0042] 140 is a reflector;

[0043] 150 is the antenna, 151 is the first antenna, 152 is the second antenna, 153 is the third antenna, 154 is the fourth antenna, and 155 is the fifth antenna;

[0044] 160 is the mounting bracket, 161 is the connecting base plate, 162 is the support part, 162A is the first support rib, 162B is the second support rib, 162C is the third support rib, and 163 is the clamping part.

[0045] 200 is the control device;

[0046] 300 is a fixed device;

[0047] 400 is an RF cable;

[0048] 500 is the installation device;

[0049] 510 is the first mounting structure, and 520 is the second mounting structure;

[0050] A represents the first effective coverage angle, and B represents the second effective coverage angle. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] The core of this application embodiment is to provide an antenna device that, by setting an antenna and a reflector, enables the interference signal to have a first effective coverage angle on a first plane that is smaller than its second effective coverage angle on a second plane. This device is applicable to aircraft countermeasures devices that reduce the impact on wireless communication in nearby areas.

[0053] Another core aspect of this application is to provide an aircraft countermeasure device that includes the aforementioned antenna device.

[0054] This specific embodiment discloses an antenna device 100, which includes a directional antenna assembly for transmitting signals. The signal transmitted by the directional antenna assembly is projected onto a first plane (e.g., ...). Figure 2 The first effective coverage angle A (as shown) is less than the signal projection onto the second plane (e.g., Figure 4 The second effective coverage angle B is shown. The first plane is perpendicular to the second plane, and the first plane is parallel to the length direction of the antenna device 100. Both the first plane and the second plane are perpendicular to the radiation surface 100a1 of the antenna device 100.

[0055] The radiating surface 100a1 mentioned in this embodiment is the surface used for transmitting signals in a directional antenna assembly. The first plane may be parallel to the length direction D1 of the antenna device 100. The second plane may be parallel to the width direction D2 of the antenna device 100.

[0056] The first effective coverage angle A mentioned in the embodiments of this application can refer to the coverage angle of a signal whose signal is greater than a first preset radiation intensity in the projection of the signal onto the first plane. For example, Figure 3 As shown, the first effective coverage angle A can be an angle within the coverage range of approximately -15° to 15°. The second effective coverage angle B can refer to the coverage angle of a signal whose signal intensity is greater than the second preset radiation intensity in the projection onto the second plane, such as... Figure 5 As shown, the second effective coverage angle B can be approximately within the coverage range of -60° to 60°. Wherein, if the radiation intensity is greater than the first preset radiation intensity, or greater than the second preset radiation intensity, it means that the radiation intensity of the signal can meet the requirements, for example, achieving the effect of interference. Alternatively, it can be understood that: the first effective coverage angle A is the beamwidth of the signal in the first plane, and the second effective coverage angle B is the beamwidth of the signal in the second plane.

[0057] In this specific embodiment, the first plane and the second plane can be planes perpendicular to the upper or lower end surface of the antenna device 100. For example, the first plane can be perpendicular to the antenna device 100 as follows: Figure 2 The sides are parallel, or the first plane is the antenna device 100, as shown. Figure 2 The plane containing the side shown. The second plane can be connected to the antenna device 100 as shown. Figure 4The sides shown are parallel, or the second plane is the antenna device 100, as shown. Figure 4 The plane containing the side shown. Alternatively, the first plane and the second plane can also be planes with an angle greater than 0° and less than 90° between them and the upper or lower end face of the antenna device 100. Here, the first plane and the second plane are merely reference planes, the purpose of which is to express the specific beamwidth of the signal from different perspectives.

[0058] Figure 2 This shows that the projection of the signal onto the first plane has a narrow first effective coverage angle A, which can also be seen as from... Figure 2 From the perspective shown, the signal beamwidth is relatively narrow. Figure 4 This shows that the projection of the signal onto the second plane has a wide second effective coverage angle B, which can also be seen as from... Figure 4 From the perspective shown, the signal beamwidth is relatively wide. Therefore, if the antenna device 100 provided in this embodiment is applied to a UAV countermeasure device, in actual use, unlike the characteristic of traditional aircraft countermeasure devices where the antenna has a large interference signal strength in all directions, the interference signal emitted by the antenna device 100 provided in this embodiment diffuses in a flat shape. Compared to the first plane, the interference signal in this embodiment has a wider beamwidth in the second plane, which can act as a kind of "signal wall" to prevent aircraft intrusion. In this way, the antenna device 100 in this embodiment can avoid emitting strong interference signals in all directions, thereby reducing the impact on wireless communication in the surrounding area.

[0059] It is understood that the antenna device 100 provided in this embodiment can also be applied to other fields where signal radiation range is required, such as wireless communication equipment.

[0060] like Figure 2 As shown, D1 is the length direction of the antenna device 100, and angle A is the first effective coverage angle A of the signal transmitted by the antenna device 100 in the specific embodiment of this application. Figure 4 As shown, D2 is the width direction of the antenna device 100, and angle B is the second effective coverage angle B of the signal transmitted by the antenna device 100 in the specific embodiment of this application.

[0061] In this embodiment, if the antenna device 100 is applied to a flight countermeasure device, the interference signal radiates to both sides with a small coverage area along the middle section perpendicular to the upper end face and the length direction D1 of the antenna device 100, thereby making the "signal wall" thinner to avoid interference with legitimate equipment within the controlled area. Simultaneously, the interference signal generated during interference operations radiates upwards, effectively interfering with aircraft (e.g., drones) in the air. The interference signal radiates to both sides with a large coverage area along the middle section perpendicular to the upper end face and the width direction D2, meaning that during interference operations, the signal wall formed by the interference signal can extend along the width direction D2 of the antenna device 100, facilitating the arrangement of the antenna device 100. The specific method of signal generation is not limited in this embodiment. If applied to a flight countermeasure device, the interference signal only needs to be able to interfere with the aircraft, such as blocking communication between the drone and the flight control terminal, or interfering with navigation signals to prevent the drone from accurately locating itself. The appearance of the antenna device 100 provided in this embodiment can be as follows: Figure 1 The shape shown can also be any other shape that meets the requirements, depending on the specific circumstances.

[0062] When using the antenna device 100 provided in this specific embodiment, the antenna device 100 may include a plurality of antennas 150. The plurality of antennas 150 are all arranged parallel to each other. When the signal emitted by the antenna 150 reaches the reflector 140, it will be reflected by the reflector 140, so that the back lobe of the antenna 150 is reflected and superimposed with its corresponding front lobe, so that the first effective coverage angle A of the signal emitted by the antenna 150 projected on the first plane is less than the second effective coverage angle B of the signal projected on the second plane. The first plane is perpendicular to the second plane. The first plane is a plane arranged along the length direction of the antenna 150, and the second plane is a plane arranged perpendicular to the length direction of the antenna 150.

[0063] Because the effective coverage angles of the signals emitted by this antenna device 100 on the first and second planes are different, when applied to aircraft countermeasures equipment, the second plane can be positioned along the edge of the controlled area. This helps to increase the interference range corresponding to a single aircraft countermeasure device, and, under certain conditions, can effectively reduce the number of aircraft countermeasures devices required.

[0064] Based on the above embodiments, such as Figures 6 to 8 As shown, the directional antenna assembly may specifically include a reflector 140 and an antenna 150. The reflector 140 is provided with a mounting bracket 160. The antenna 150 is mounted on the mounting bracket 160, and there is a gap between the antenna 150 and the reflector 140. The antenna 150 is an omnidirectional antenna, and the antenna 150 is located between the radiating surface 100a1 and the reflector 140.

[0065] In practical use, the reflector 140 can be made of metal, and the antenna 150 can be a directional antenna or an omnidirectional antenna. If the antenna 105 is an omnidirectional antenna, the front lobe of the antenna 150 emits towards the radiating surface 100a1. The reflector 140 can reflect the back lobe of the antenna 150 to superimpose with its front lobe. Therefore, the signal ultimately emitted from the radiating surface 100a1 includes both the front lobe of the antenna and the reflected back lobe. For example, when the antenna 150 is an omnidirectional fiberglass antenna, the reflector 140 can not only cooperate with the omnidirectional fiberglass antenna to achieve the effect of a directional antenna, but also help to improve the gain of the front lobe of the antenna 150.

[0066] In this specific embodiment, the antenna 150 is mounted on the mounting bracket 160, which can effectively support and fix the antenna 150, thereby effectively improving the stability of the antenna 150 installation. Furthermore, the antenna 150 is an omnidirectional antenna. Omnidirectional antennas have a relatively simple design, making the installation process easier, eliminating the need for precise alignment, and reducing costs.

[0067] In one specific embodiment, such as Figure 6 As shown, the antenna device 100 also includes a housing 100a, and the reflector 140, mounting bracket 160 and antenna 150 are all located inside the housing 100a. Along the length of the antenna 150, at least one end of the antenna 150 is disposed in the housing 100a and the other end is disposed in the mounting bracket 160.

[0068] In this configuration, the longitudinal direction of antenna 150 is parallel to the longitudinal direction D1 of antenna device 100. If one end of antenna 150 is mounted on housing 100a and the other end on mounting bracket 160, the mounting bracket 160 is positioned at the end of antenna 150. Since the main radiation area of ​​antenna 150 is in the middle, the mounting bracket 160 being located at the end of antenna 150 has minimal impact on the radiation performance of antenna 150, allowing as many back lobes as possible to be reflected, thereby improving the gain of antenna 150.

[0069] like Figure 6As shown, the antenna device 100 may specifically include a first end cap 110, a housing 120, a second end cap 130, a reflector 140, an antenna 150, and a mounting bracket 160. The first end cap 110, the housing 120, and the second end cap 130 constitute the entire outer housing of the antenna device 100. The housing 120 is, for example, barrel-shaped. The first end cap 110 and the second end cap 130 are respectively installed at both ends of the housing 120 along its length to form a sealed cavity. The reflector 140, the antenna 150, and the mounting bracket 160 are all disposed within the space formed by the housing 120, the first end cap 110, and the second end cap 130. The antenna 150 may be a columnar fiberglass antenna. One end of the antenna 150 is fixed to the inner side of the second end cap 130 or the first end cap 110, and the other end of the antenna 150 is mounted on the mounting bracket 160, which is mounted on the reflector 140. In this embodiment, if the lengths of all antennas 150 are not significantly different, then the other end of all antennas 105 can be like... Figure 6 The four antennas 150 on the left side are identical, with their other ends mounted on the mounting bracket 160. However, if the length of one antenna 150 is significantly longer than the length of the other antennas 150, for example... Figure 6 Like the rightmost antenna 150, the other end of these longer antennas 150 can be suspended or mounted on the first end cover 110 or the second end cover 130, and the middle part can be mounted on the mounting bracket 160.

[0070] In this specific embodiment, the reflector 140, antenna 150, and mounting bracket 160 are all disposed within the space formed by the outer shell 120, the first end cover 110, and the second end cover 130, which can effectively protect the antenna 150 and reduce the impact of the external environment on the lifespan of the antenna 150.

[0071] Specifically, antenna 150 can be a cylindrical antenna, with its extension direction parallel to the length direction of the radiating surface 100a1, so that the overall radiation direction of antenna device 100 can be wider in its width direction and narrower in its length direction. The length direction of the radiating surface 100a1 is parallel to the length direction D1 of antenna device 100. Antenna 150 can specifically be a fiberglass antenna.

[0072] In this specific embodiment, the radiating surface 100a1 refers to the outer surface of the sidewall of the outer shell 120 that radiates signals outward and is positioned at intervals relative to the reflector 140.

[0073] Based on the above embodiments, the number of antennas 150 can be multiple, and the multiple antennas 150 are distributed at intervals in the width direction of the reflector 140.

[0074] Specifically, the width direction of the reflector 140 is parallel to the width direction D2 of the antenna device 100. For example... Figure 7As shown, antenna 150 includes a first antenna 151, a second antenna 152, a third antenna 153, a fourth antenna 154, and a fifth antenna 155. The frequency band of each antenna 150 can be set to correspond to the communication frequency band of an aircraft. Each antenna 150 is positioned above the reflector 140 at a certain distance from the reflector 140. Of course, in actual settings, the number of antennas 150 is not limited to the five used in this scheme; it can be more or less than five.

[0075] Specifically, the distance between the center of the cross-section of antenna 150 and reflector 140 is (1 / 4)*λ, where λ is the wavelength of the signal transmitted by antenna 150 in the corresponding frequency band, in order to achieve better directional transmission. The distance between each antenna 150 and reflector 140 depends on the frequency band of its transmitted signal; therefore, if different antennas 150 correspond to different frequency bands, the distance between different antennas 150 and reflector 140 will also be different.

[0076] Based on the above embodiments, such as Figure 8 As shown, the mounting bracket 160 specifically includes a connecting base plate 161, a clamping part 163, and a supporting part 162. The connecting base plate 161 is used to connect to the reflector 140. The clamping part 163 is disposed on the side of the connecting base plate 161 facing away from the reflector 140, that is, the clamping part 163 is closer to the radiating surface 100a1. Furthermore, the clamping part 163 is used to clamp the antenna 150. One end of the supporting part 162 is connected to the connecting base plate 161, and the other end is connected to the clamping part 163.

[0077] At least one of the clamping part 163 and the supporting part 162 is an insulating elastic element, which can effectively fix the antenna 150 while avoiding affecting the operation of the antenna 150 compared to metal materials. Due to its elasticity, it can also have a certain shock resistance.

[0078] On the other hand, since the mounting bracket 160 is located between the antenna 150 and the reflector 140, it will affect the reflection effect of the reflector 140 on the back lobe radiation of the antenna 150. Therefore, placing the mounting bracket 160 at the end of the antenna 150 along its length is preferable. Since the main radiation area of ​​the antenna 150 is in the middle of its length, not at the end, the mounting bracket 160 has less impact on the radiation performance of the antenna 150. Specifically, the mounting bracket 160 can be placed at the end of the reflector 140 away from the second end cap 130. Compared to fixing the mounting bracket 160 at the middle of the antenna 150, fixing the mounting bracket 160 at the end of the antenna 150 along its length reduces the impact of the mounting bracket 160 on the reflection effect of the reflector 140.

[0079] Furthermore, the clamping part 163 may have an opening facing the radiating surface 100a1, and the two sides of the opening of the clamping part 163 may be elastic structures.

[0080] like Figure 7 and Figure 8 As shown, the clamping part 163 has a "C"-shaped structure. Since the clamping part 163 is made of plastic material with a certain degree of elasticity, the antenna 150 can be inserted into the clamping part 163 through the opening of the "C"-shaped structure. If the antenna 150 is a fiberglass antenna, the "C"-shaped clamping part 163 is compatible with the axial cross-sectional shape of the fiberglass antenna, thus it can also effectively clamp and fix a cylindrical fiberglass antenna.

[0081] In this specific embodiment, the clamping part 163 is configured with an opening facing the radiating surface 100a1, which facilitates placing the antenna 150 inside the clamping part 163 and simplifies the operation process.

[0082] like Figure 8 As shown, the support portion 162 may specifically include a first support rib 162A, a second support rib 162B, and a third support rib 162C. The third support rib 162C is connected between the first support rib 162A and the second support rib 162B, and the thickness of the third support rib 162C is less than or equal to the thickness of the first support rib 162A or the thickness of the second support rib 162B, so as to reduce the weight of the mounting bracket 160 and facilitate weight reduction.

[0083] In addition to the antenna device 100 described above, this application also provides an aircraft countermeasure device that includes the antenna device 100 disclosed in the above embodiments. For the structure of the other parts of the aircraft countermeasure device besides the antenna device 100, please refer to the prior art, and it will not be described again here.

[0084] In one specific embodiment, the aircraft countermeasure device further includes a mounting device 500 and a fixing device 300. The antenna device 100 is rotatably mounted to the fixing device 300 via the mounting device 500.

[0085] like Figure 9As shown, the aircraft countermeasure device includes a control device 200, a fixing device 300, an RF cable 400, and an installation device 500. The installation device 500 may specifically include a first installation structure 510 and a second installation structure 520. The control device 200 is electrically connected to the antenna device 100 and is used to control the antenna device 100 to transmit jamming signals. The antenna device 100 and the control device 200 are electrically connected via the RF cable 400. The control device 200 outputs RF signals to the antenna device 100 through the RF cable 400. The antenna device 100 converts the received RF signals into electromagnetic wave signals of the corresponding frequency band and transmits them as jamming signals. When an aircraft (such as a drone) flies into the area affected by the jamming signal, the drone will be unable to maintain stable communication with the flight control terminal under the influence of the jamming signal, resulting in hovering, crashing, or returning to base, thus achieving the jamming effect on the drone.

[0086] The control device 200 may include a main controller, a baseband module, a power amplifier module, a power supply module, etc., wherein the main controller may be a CPU (Central Processing Unit) or an FPGA (Field Programmable Gate Array). In other optional embodiments, the control device 200 may also be equipped with a receiving antenna (not shown in the figure). The receiving antenna is used to receive electromagnetic wave signals in the air and convert them into corresponding electrical signals before outputting them to the main controller. The main controller can analyze and process the received electrical signals to obtain communication information between the UAV and the flight control terminal (such as communication channel, communication protocol, communication signal type, etc.), and the main controller can also generate radio frequency signals according to the communication information so that the antenna device 100 can selectively emit interference signals, thereby improving the interference effect on the UAV. The specific method of generating the interference signal is not limited in this embodiment, as long as it can interfere with the UAV, such as blocking the communication between the UAV and the flight control terminal, interfering with navigation signals, so that the UAV cannot accurately locate itself, etc.

[0087] When using the aircraft countermeasure device provided in this specific embodiment, the aircraft countermeasure device first needs to be installed on the fixed device 300. The antenna device 100 is rotatably installed on the fixed device 300 via the first mounting structure 510. The control device 200 is fixedly installed on the fixed device 300 via the second mounting structure 520. Specifically, the antenna device 100 is rotatably installed on the first mounting structure 510, and the first mounting structure 510 is fixed to the fixed device 300. The control device 200 is fixed to the second mounting structure 520, and the second mounting structure 520 is fixed to the fixed device 300.

[0088] like Figure 9As shown, the first mounting structure 510 is sleeved on the rod-shaped fixing device 300 and its mounting position is adjustable along the height direction of the fixing device 300. The first mounting structure 510 is provided with a rotating part, which is connected to the antenna device 100. The antenna device 100 can rotate relative to the fixing device 300 in the elevation direction. By adjusting the rotating part, the tilt angle of the antenna device 100 can be adjusted so as to adjust the tilt angle of the signal transmitted by the antenna device 100 according to the actual situation.

[0089] Furthermore, the second mounting structure 520 can be clamped to the rod-shaped fixing device 300, and the mounting height of the second mounting structure 520 on the fixing device 300 is adjustable. Specifically, the second mounting structure 520 can be configured as a claw-type structure, or as a structure with a mounting sleeve and a tightening member. The mounting sleeve is fitted onto the fixing device 300, and the tightening member passes through the mounting sleeve and tightens against the fixing device 300. Of course, the second mounting structure 520 can also be other structural forms, which are determined according to the actual situation and will not be elaborated here. In other optional embodiments, the fixing device 300 can also be a rod-shaped facility near the controlled area, such as a utility pole or street light pole.

[0090] In this embodiment, the installation angle of the antenna device 100 relative to the fixed device 300 can be adjusted. For example, the antenna device 100 can be rotated relative to the fixed device 300 in the pitch direction according to actual needs to adjust the transmission direction of the antenna device 100, thereby improving the interference effect.

[0091] In this embodiment, the control device 200 can be fixedly mounted on the fixed device 300 via the second mounting structure 520, and the antenna device 100 can be rotatably mounted on the fixed device 300 via the first mounting structure 510. After adjusting the antenna device 100 to a suitable angle, the antenna device 100 is then fixed on the fixed device 300. After that, the aircraft countermeasure equipment can begin to perform jamming operations. Since the coverage area of ​​the jamming signal emitted by the antenna device 100 is flat, it can form an effect similar to a "signal wall," which is convenient for protecting the controlled area.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. All combinations of the embodiments provided in this application are within the protection scope of this utility model and will not be elaborated upon here.

[0093] The antenna device and aircraft countermeasure equipment provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. An antenna device, characterized in that, The antenna device includes a directional antenna assembly, which is used to transmit signals; The first effective coverage angle of the signal projected onto the first plane is smaller than the second effective coverage angle of the signal projected onto the second plane; The first plane is perpendicular to the second plane, the first plane is parallel to the length direction of the antenna device, and both the first plane and the second plane are perpendicular to the radiation surface (100a1) of the antenna device.

2. The antenna device according to claim 1, characterized in that, The directional antenna assembly includes: The reflector (140) is provided with a mounting bracket (160); Antenna (150), the antenna (150) is disposed on the mounting bracket (160), and there is a gap between the antenna and the reflector (140); The antenna (150) is an omnidirectional antenna, and the antenna (150) is located between the radiating surface (100a1) and the reflector (140).

3. The antenna device according to claim 2, characterized in that, The antenna device further includes a housing (100a), and the reflector (140), the mounting bracket (160) and the antenna (150) are all located inside the housing (100a); Along the length of the antenna (150), at least one end of the antenna (150) is disposed on the housing (100a), and the other end is disposed on the mounting bracket (160).

4. The antenna device according to claim 2, characterized in that, The antenna (150) is a cylindrical antenna, and the extension direction of the cylindrical antenna is parallel to the length direction of the radiating surface (100a1).

5. The antenna device according to claim 2, characterized in that, The number of antennas (150) is multiple, and the multiple antennas (150) are spaced apart in the width direction of the reflector (140).

6. The antenna device according to any one of claims 2-5, characterized in that, The mounting bracket (160) includes: A connecting substrate (161) is used to connect to the reflector (140); A clamping part (163) is disposed on the side of the connecting substrate (161) facing away from the reflector (140), and the clamping part (163) is used to clamp the antenna (150); The support part (162) is connected at one end to the connecting substrate (161) and at the other end to the clamping part (163).

7. The antenna device according to claim 6, characterized in that, At least one of the clamping part (163) and the supporting part (162) is an insulating elastic element.

8. The antenna device according to claim 6, characterized in that, The clamping part (163) has an opening facing the radiating surface (100a1), and the two sides of the opening of the clamping part (163) are elastic structures.

9. The antenna device according to any one of claims 2-5, characterized in that, The distance between the center of the cross-section of the antenna (150) and the reflector (140) is (1 / 4)*λ, where λ is the wavelength of the frequency band of the signal emitted by the antenna (150).

10. The antenna device according to any one of claims 2-5, characterized in that, The antenna device further includes a housing (100a), which includes a housing (120), a first end cap (110), and a second end cap (130). The first end cap (110) and the second end cap (130) are respectively disposed at both ends of the housing (120) along its length. One end of the antenna (150) is disposed at one of the first end cap (110) and the second end cap (130). The reflector (140), the mounting bracket (160), and the antenna (150) are located within the space formed by the housing (120), the first end cap (110), and the second end cap (130).

11. An aircraft countermeasure device, characterized in that, The aircraft countermeasure device includes the antenna device (100) as described in any one of claims 1-10.

12. The aircraft countermeasure device according to claim 11, characterized in that, The aircraft countermeasure device also includes an installation device (500) and a fixing device (300); the antenna device (100) is rotatably mounted on the fixing device (300) via the installation device (500).

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