阅读说明：本技术 全向天线系统及无人机监听设备 (Omnidirectional antenna system and unmanned aerial vehicle monitoring equipment ) 是由 汤一君 杨飞虎 胡孟 高志涛 于 2018-09-21 设计创作，主要内容包括：一种全向天线系统(100)及无人机监听设备。全向天线系统(100)包括沿预设方向排列的至少一个天线圆阵(40),所述至少一个天线圆阵(40)的中心共轴,每个所述天线圆阵(40)包括沿圆周均匀布设的多个相同频段的天线结构(50)。全向天线系统(100)通过将多个天线结构(50)沿圆周均匀设置,可实现水平面各个方向都有较好的全向辐射与信号接收能力以及抗干扰性能的高增益全向天线系统(100)。既可以解决普通无人机侦听设备侦听距离近、不同方向侦听能力差异明显的问题。同时,还可以解决普通无人机侦听设备易受电磁信号噪声干扰的问题。(An omnidirectional antenna system (100) and an unmanned aerial vehicle monitoring device. The omnidirectional antenna system (100) comprises at least one circular antenna array (40) arranged along a preset direction, the centers of the at least one circular antenna array (40) are coaxial, and each circular antenna array (40) comprises a plurality of antenna structures (50) which are uniformly distributed along the circumference and have the same frequency band. The omnidirectional antenna system (100) can realize the high-gain omnidirectional antenna system (100) with better omnidirectional radiation and signal receiving capability and anti-interference performance in all directions of a horizontal plane by uniformly arranging the plurality of antenna structures (50) along the circumference. The problem that the interception distance of the interception equipment of the common unmanned aerial vehicle is short and the interception capability difference in different directions is obvious can be solved. Meanwhile, the problem that the common unmanned aerial vehicle interception equipment is easily interfered by electromagnetic signal noise can be solved.)

1. An omnidirectional antenna system is characterized by comprising at least one circular antenna array arranged along a preset direction, wherein the center of the at least one circular antenna array is coaxial, and each circular antenna array comprises a plurality of antenna structures which are uniformly distributed along the circumference and have the same frequency band.

2. The omnidirectional antenna system of claim 1, wherein an included angle between a line connecting two adjacent antenna structures projected onto the same circumference by the antenna structures of the same frequency band and the center of the antenna circular array is smaller than a preset angle.

3. The omni directional antenna system according to claim 2, wherein the preset angle is less than or equal to a half-power beamwidth of the antenna structure.

4. The omnidirectional antenna system of claim 3, wherein the antenna structure has a half-power beamwidth of 25 °.

5. The omnidirectional antenna system of claim 2, wherein the circular array of antennas comprises a first circular array of antennas and a second circular array of antennas, wherein a frequency band of the antenna structures on the first circular array of antennas is greater than a frequency band of the antenna structures on the second circular array of antennas.

6. An omnidirectional antenna system according to claim 5, wherein the circular array of antennas comprises one circular array of the first antenna and two circular arrays of the second antenna, the radius of the first circular array of antennas being substantially equal to the radius of the second circular array of antennas.

7. The omni directional antenna system according to claim 6, wherein the first circular array of antennas comprises 16 antenna structures for 5.8G bands.

8. The omnidirectional antenna system of claim 6, wherein the two second antenna circular arrays are staggered with respect to each other, each second antenna circular array comprises 8 antenna structures in 2.4G frequency band, and an included angle between a line connecting two adjacent antenna structures projected onto the same circumference and a center of the antenna circular array is 22.5 °.

9. The omnidirectional antenna system of claim 6, wherein the antenna structure of the first circular array of antennas comprises an input port and a first output port, and wherein the antenna structure of the second circular array of antennas comprises a second output port;

and a second output port of the antenna structure of the second antenna circular array is connected with an input port of the antenna structure of the first antenna circular array, and a first output port of the antenna structure of the first antenna circular array is used for connecting an external receiver.

10. An omnidirectional antenna system according to claim 1, wherein the plurality of antenna structures are each tilted at the same tilt angle with respect to the predetermined direction.

11. The utility model provides an unmanned aerial vehicle monitoring equipment, its characterized in that includes the receiver, embraces pole and omnidirectional antenna system, omnidirectional antenna includes along at least one antenna circle battle array that predetermines the direction range, the center of at least one antenna circle battle array is coaxial, every antenna circle battle array includes the antenna structure of a plurality of same frequency channels of evenly laying along the circumference, omnidirectional antenna system installs and locates embrace the pole, omnidirectional antenna system is connected to through the connecting wire the receiver.

12. The unmanned aerial vehicle listening device of claim 11, wherein an included angle between a line connecting two adjacent antenna structures projected onto the same circumference by the antenna structures of the same frequency band and the center of the antenna circular array is smaller than a preset angle.

13. The drone listening device of claim 12, wherein the preset angle is less than or equal to a half-power beamwidth of the antenna structure.

14. The drone listening device of claim 13, wherein the antenna structure has a half-power beamwidth of 25 °.

15. The drone listening device of claim 12, wherein the circular array of antennas comprises a first circular array of antennas and a second circular array of antennas, and wherein the frequency band of the antenna structures on the first circular array of antennas is greater than the frequency band of the antenna structures on the second circular array of antennas.

16. The drone listening device of claim 15, wherein the circular array of antennas comprises one circular array of the first antennas and two circular arrays of the second antennas, the first circular array of antennas having a radius approximately equal to a radius of the second circular array of antennas.

17. The drone listening device of claim 16, wherein the first circular array of antennas comprises 16 antenna structures in 5.8G bands.

18. The UAV listening device of claim 16, wherein the two second antenna circular arrays are staggered with respect to each other, each second antenna circular array comprises 8 antenna structures with 2.4G frequency bands, and an included angle between a line connecting two adjacent antenna structures projected onto the same circumference and the center of the antenna circular array is 22.5 °.

19. The drone listening device of claim 16, wherein the antenna structure of the first circular array of antennas comprises an input port and a first output port, and the antenna structure of the second circular array of antennas comprises a second output port;

and a second output port of the antenna structure of the second antenna circular array is connected with an input port of the antenna structure of the first antenna circular array, and a first output port of the antenna structure of the first antenna circular array is used for connecting an external receiver.

20. The drone listening device of claim 11, wherein the plurality of antenna structures are each disposed at an angle of inclination relative to the predetermined direction at the same angle of inclination.

Technical Field

The embodiment of the invention relates to the technical field of unmanned aerial vehicles, in particular to an omnidirectional antenna system and unmanned aerial vehicle monitoring equipment.

Background

Unmanned aerial vehicle is used by more and more users as the equipment of taking photo by plane of present comparison hot. However, the use of drones can be problematic for certain areas of the facility, such as airports or government office areas.

The existing common unmanned aerial vehicle interception equipment generally has the problems of short interception distance and obvious interception capability difference in different directions. Furthermore, the common unmanned aerial vehicle interception equipment is easily interfered by electromagnetic signal noise.

Disclosure of Invention

The embodiment of the invention provides an omnidirectional antenna system and unmanned aerial vehicle monitoring equipment, and the high-gain omnidirectional antenna system with better omnidirectional radiation and signal receiving capability and anti-interference performance in all directions of a horizontal plane can be realized.

According to a first aspect of embodiments of the present invention, an omnidirectional antenna system is provided, which includes at least one circular array of antennas arranged along a predetermined direction, the centers of the at least one circular array of antennas are coaxial, and each circular array of antennas includes a plurality of antenna structures of the same frequency band uniformly arranged along a circumference.

Furthermore, the included angle between the connecting lines of the adjacent two antenna structures projected onto the same circumference by the antenna structures of the same frequency band and the circle center of the antenna circular array is smaller than a preset angle.

Further, the preset angle is smaller than or equal to a half-power beam width of the antenna structure.

Further, the half-power beamwidth of the antenna structure is 25 °.

Furthermore, the antenna circular array comprises a first antenna circular array and a second antenna circular array, and the frequency band of the antenna structure on the first antenna circular array is greater than the frequency band of the antenna structure on the second antenna circular array.

Further, the antenna circular arrays include one first antenna circular array and two second antenna circular arrays, and the radius of the first antenna circular array is approximately equal to the radius of the second antenna circular array.

Further, the first antenna circular array comprises 16 antenna structures of 5.8G frequency bands.

Furthermore, the two second antenna circular arrays are arranged in a staggered manner, each second antenna circular array comprises 8 antenna structures with 2.4G frequency bands, and an included angle between connecting lines of the two adjacent antenna structures projected onto the same circumference and the circle center of the antenna circular array is 22.5 degrees.

Further, the antenna structure of the first antenna circular array comprises an input port and a first output port, and the antenna structure of the second antenna circular array comprises a second output port;

and a second output port of the antenna structure of the second antenna circular array is connected with an input port of the antenna structure of the first antenna circular array, and a first output port of the antenna structure of the first antenna circular array is used for connecting an external receiver.

Further, the plurality of antenna structures are all obliquely arranged relative to the preset direction at the same inclination angle.

According to a second aspect of the embodiments of the present invention, an unmanned aerial vehicle monitoring device is provided, which includes a receiver, a pole and the omnidirectional antenna system of any of the above embodiments, wherein the omnidirectional antenna system is installed on the pole, and the omnidirectional antenna system is connected to the receiver through a connection line.

According to the omnidirectional antenna system provided by the embodiment of the invention, the plurality of antenna structures are uniformly arranged along the circumference, so that the high-gain omnidirectional antenna system with better omnidirectional radiation and signal receiving capability and anti-interference performance in all directions of a horizontal plane can be realized. The problem that the interception distance of the interception equipment of the common unmanned aerial vehicle is short and the interception capability difference in different directions is obvious can be solved. Meanwhile, the problem that the common unmanned aerial vehicle interception equipment is easily interfered by electromagnetic signal noise can be solved.

Drawings

Fig. 1 is a schematic perspective view of an unmanned aerial vehicle monitoring device according to an embodiment of the present invention.

Fig. 2 is a top view of an unmanned aerial vehicle monitoring device according to an embodiment of the present invention.

Fig. 3 is a schematic perspective view of another drone listening device according to an embodiment of the present invention.

Fig. 4 is a top view of the drone listening device shown in the embodiment of the present invention, which only shows one group of circular arrays of antennas.

Fig. 5 is a top view of an unmanned aerial vehicle monitoring device showing two sets of circular arrays of antennas according to an embodiment of the present invention.

Fig. 6 is a schematic perspective view of another drone listening device according to an embodiment of the present invention.

Fig. 7 and fig. 8 are schematic perspective views of an antenna structure of a 5.8G frequency band of an unmanned aerial vehicle monitoring device according to an embodiment of the present invention.

Fig. 9 and fig. 10 are schematic perspective views of an antenna structure of a 2.4G frequency band of an unmanned aerial vehicle monitoring device according to an embodiment of the present invention.

Fig. 11 and 12 are schematic connection diagrams of an antenna structure of a 5.8G frequency band and an antenna structure of a 2.4G frequency band of an unmanned aerial vehicle monitoring device according to an embodiment of the present invention.

Fig. 13 is a schematic perspective view of an unmanned aerial vehicle monitoring apparatus shown in the embodiment of the present invention, where only a connection device is shown.

Fig. 14 is an exploded schematic view of a clasping assembly and a ring support of a connecting device of a monitoring apparatus for an unmanned aerial vehicle according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a ground line of a connection device of an unmanned aerial vehicle monitoring apparatus according to an embodiment of the present invention.

Fig. 16 is a schematic connection diagram of a mounting component and an antenna structure of a connection device of a drone listening device according to an embodiment of the present invention.

Fig. 17 is a partially enlarged schematic view of fig. 16.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of embodiments of the invention, as detailed in the following claims.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The embodiment of the invention provides an omnidirectional antenna system and unmanned aerial vehicle monitoring equipment, so that the antenna system can realize the performance of omnidirectional high gain on the horizontal plane. The omnidirectional antenna system and the unmanned aerial vehicle monitoring device according to the embodiment of the invention are described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

Referring to fig. 1 and fig. 2, a schematic structural diagram of a drone listening device is shown. The embodiment of the invention provides an omnidirectional antenna system 100, which can be used as a part of the unmanned aerial vehicle monitoring equipment and applied to areas such as airports, government office organizations and the like needing to monitor and supervise unmanned aerial vehicles. The omnidirectional antenna system 100 includes at least one circular antenna array 40 arranged along a preset direction, the centers of the at least one circular antenna array 40 are coaxial, and each circular antenna array 40 includes a plurality of antenna structures 50 of the same frequency band uniformly arranged along the circumference. In the present embodiment, the antenna structure 50 employs a 4 × 4 antenna array. The omnidirectional antenna system 100 may be mounted on a fixed structure with a certain height requirement through a connecting device 300, such as the pole 90, and the predetermined direction corresponds to the length direction of the pole 90. The omnidirectional antenna system 100 may also be connected to a remote control device of the drone, and configured to send a control signal to the drone or receive a signal transmitted back from the drone.

The omnidirectional antenna system 100 of the embodiment of the invention is based on the antenna arrays, the gain of the antenna can be improved by using a single antenna array, the radiation and signal receiving capacity of the antenna towards a certain specific direction can be improved, and the plurality of antenna arrays are uniformly arranged along the circumference, so that the high-gain omnidirectional antenna system 100 with better omnidirectional radiation and signal receiving capacity and anti-interference performance in all directions of the horizontal plane is realized. The problem that the interception distance of the interception equipment of the common unmanned aerial vehicle is short and the interception capability difference in different directions is obvious can be solved. Meanwhile, the problem that the common unmanned aerial vehicle interception equipment is easily interfered by electromagnetic signal noise can be solved.

In an alternative embodiment, an included angle between a connecting line between two adjacent antenna structures 50, which are projected onto the same circumference by the antenna structures 50 of the same frequency band, and a center of a circle, which is projected onto the circumference by the antenna circular array 40, is smaller than a preset angle. Optionally, the preset angle is smaller than or equal to a half-power beam width of the antenna structure 50. In the present embodiment, the half-power beamwidth of the antenna structure 50 is 25 °.

In the omnidirectional antenna system 100 according to the embodiment of the present invention, the number of the antenna circular arrays 40 may be one or more, and different antenna circular arrays 40 may adopt the antenna structures 50 of the same frequency band or the antenna structures 50 of different frequency bands, or a plurality of antenna circular arrays 40 of the antenna structures 50 of different frequency bands are used in combination. The same circular array of antennas formed by the plurality of antenna structures 50 may include antenna structures of one or more frequency bands.

In the example shown in fig. 1 and 2, the omnidirectional antenna system 100 is composed of antenna structures 50 with the same frequency band, and the frequency bands commonly used by the drones are 2.4GHz and 5.8 GHz. In some embodiments, the number of the antenna circular arrays 40 is one, the antenna structures 50 in the 5.8G frequency band may be adopted, and in order to make the out-of-roundness of the comprehensive pattern of the omnidirectional antenna system 100 in the horizontal plane less than 3dB, 16 antenna structures 50 are adopted to form an omnidirectional high-gain antenna system, and an included angle between connecting lines of centers of the two adjacent antenna structures 50 projected onto the same circumference and the antenna circular array 40 is 22.5 °, which meets the requirement of a half-power beam width smaller than that of the antenna structures 50. When the antenna gain is about 15dBi, the radiation efficiency is more than 90 percent. Of course, the antenna circular array 40 may also adopt the antenna structure 50 in the 2.4G frequency band, since the half-power beam width of the antenna structure 50 is 25 °, in order to implement high-gain radiation in the range of 360 °, at least 15 antenna structures 50 are required, and since the size of the antenna structure 50 in the 2.4G frequency band is large, the diameter of the formed antenna circular array 40 is large, and the overall size of the omnidirectional antenna is also relatively large.

Referring to fig. 3 to 5, in order to reduce the problem that the overall size of the omnidirectional antenna system 100 is large due to the antenna structure 50 adopting the 2.4G frequency band, the number of the antenna circular arrays 40 may be two, each antenna circular array 40 includes 8 antenna structures 50 of the 2.4G frequency band, and the 8 antenna structures 50 of the two antenna circular arrays 40 are arranged in a staggered manner. When the antenna gain is about 16dBi, the radiation efficiency is more than 93 percent.

Thus, although the included angle between the two adjacent antenna structures 50 projected onto the same circumference by the antenna structure 50 of each antenna circular array 40 and the connecting line of the centers of the antenna circular arrays 40 is 45 ° (as shown in fig. 4), since the 8 antenna structures 50 of the two antenna circular arrays 40 are staggered with each other, the included angle between the two adjacent antenna structures 50 projected onto the same circumference by all the antenna structures 50 of the two antenna circular arrays 40 and the connecting line of the centers of the corresponding antenna circular arrays 40 is still 22.5 ° (as shown in fig. 5), which also meets the requirement of being smaller than the half-power beam width of the antenna structures 50.

Referring to fig. 6, in the example shown in fig. 6, an omni-directional antenna system 100 is comprised of two antenna structures 50 of different frequency bands. The antenna circular array 40 comprises a first antenna circular array 41 and a second antenna circular array 42, and the frequency band of the antenna structure 50 on the first antenna circular array 41 is greater than the frequency band of the antenna structure 50 on the second antenna circular array 42. In this embodiment, the first antenna circular array 41 adopts the antenna structure 50 of the 5.8G frequency band, and the second antenna circular array 42 adopts the antenna structure 50 of the 2.4G frequency band, so that the dual-band omnidirectional antenna system formed in this way has a stronger unmanned aerial vehicle listening capability.

Further, the number of the first antenna circular arrays 41 is one, and the first antenna circular arrays include 16 antenna structures 50 in 5.8G frequency bands. The number of the second antenna circular arrays 42 is two, and each second antenna circular array 42 includes 8 antenna structures 50 in 2.4G frequency bands. Thus, the radius of the first circular array of antennas 41 can be made substantially equal to the radius of the second circular array of antennas 42.

Moreover, the included angle between the connecting lines of the centers of the two adjacent antenna structures 50 of the 5.8G frequency band projected onto the same circumference and the first antenna circular array 41 is 22.5 °, the included angle between the connecting lines of the centers of the two adjacent antenna structures 50 of the 2.4G frequency band projected onto the same circumference and the corresponding second antenna circular array 42 is also 22.5 °, and both the included angles meet the requirement of being smaller than the half-power beam width of the antenna structures 50.

Referring to fig. 7 and 8, in an alternative embodiment, the antenna structure 50 of the 5.8G band of the first antenna circular array 41 includes a first rf connector 61, and the first rf connector 61 includes an input port 53 and a first output port 54. Referring to fig. 9 and 10, the antenna structure 50 of the 2.4G band of the second circular array of antennas 42 includes a second rf connector 62, and the second rf connector 62 includes a second output port 55.

Referring to fig. 11 and 12, the second output port 55 of the second rf connector 62 of the antenna structure 50 in the 2.4G band is connected to the input port 53 of the first rf connector 61 of the antenna structure 50 in the 5.8G band by a cable, and the first output port 54 of the first rf connector 61 of the antenna structure 50 in the 5.8G band is connected to an external receiver by a cable. In this way, the second output port 55 of the second rf connector 62 of the antenna structure 50 in the 2.4G band is connected to the input port 53 of the first rf connector 61 of the antenna structure 50 in the 5.8G band, and then the first output port 54 of the first rf connector 61 of the antenna structure 50 in the 5.8G band is connected to the receiver, so that only an interface connected to the antenna structure 50 in the 5.8G band needs to be configured on the receiver, and a corresponding interface connected to the antenna structure 50 in the 2.4G band does not need to be configured, so as to save the port configuration of the receiver.

In an alternative embodiment, the plurality of antenna structures 50 are all disposed at the same tilt angle with respect to the predetermined direction. I.e., the pitch angle of the antenna structure 50, is adjustable to accommodate complex environments. For example, the antenna structure 50 may be angled upwardly relative to the pole 90 to detect a drone condition in a particular area.

A connection device 300 for mounting the omnidirectional antenna system 100 to the pole 90 is described below with reference to the drawings.

Referring to fig. 13, the connecting device 300 includes: a clasping assembly 10, a ring support 20 and a plurality of mounting assemblies 30. Wherein, hold the subassembly 10 tightly and be equipped with the portion 11 of holding tightly of holding pole 90 looks adaptation, hold the subassembly 10 tightly and be connected with holding pole 90 through this portion 11 of holding tightly. The loop holder 20 is located outside the clasping assembly 10 and is fixedly connected with the clasping assembly 10. The number of the mounting assemblies 30 is equal to the number of the antenna structures 50, and the plurality of mounting assemblies 30 are uniformly arranged on the outer circumferential surface of the annular bracket 20 along the circumference and are connected with the plurality of omnidirectional antennas in a one-to-one correspondence manner, so that the omnidirectional antenna system 100 is composed of the plurality of antenna structures 50. The omnidirectional antenna system 100 is connected with the pole 90 through the holding part 11 of the holding component 10, and can be used in the areas such as airports, government office institutions and the like which need to monitor and supervise the unmanned aerial vehicle.

In an optional embodiment, the clasping assembly 10 comprises a first clasping structure 12 and a second clasping structure 13 which are fixedly connected with each other from two sides of the clasping rod 90, the first clasping structure 12 is provided with a first clasping portion 14 matched with the clasping rod 90, the second clasping structure 13 is provided with a second clasping portion 15 matched with the clasping rod 90, and the first clasping portion 14 and the second clasping portion 15 clasp the clasping rod 90 from two sides of the clasping rod 90, so that the clasping assembly 10 and the clasping rod 90 are fixed with each other.

Referring to fig. 14, further, the first clasping structure 12 is provided with at least one first connecting hole 17, the second clasping structure 13 is provided with second connecting holes 18 corresponding to the first connecting holes 17 in position and quantity, first fasteners 19 are inserted between the first connecting holes 17 and the second connecting holes 18 in positions, the first clasping portion 14 and the second clasping portion 15 are fastened to each other from two sides of the clasping rod 90, and then the first fasteners 19 pass through the first connecting holes 17 and the second connecting holes 18 to fix the first clasping portion 14 and the second clasping portion 15 to each other, so as to clasp the clasping rod 90.

In the present embodiment, the first fastening structure 12 has a first connecting hole 17 at each of four corners thereof, and the second fastening structure 13 has a second connecting hole 18 at each of four corners thereof. The first fastener 19 may be a bolt and a washer and nut engaged with the bolt. The first clasping structure 12 and the second clasping structure 13 are convenient to mount and dismount in a mode of matching and connecting bolts and nuts.

In addition, in order to make the first enclasping structure 12 and the second enclasping structure 13 be connected with the enclasping pole 90 more firmly, the surfaces of the first enclasping structure 12 and the second enclasping structure 13, which are attached to the enclasping pole 90, are provided with a plurality of concave portions 16, so that the grabbing force between the first enclasping structure 12 and the second enclasping structure 13 and the enclasping pole 90 can be increased. In an alternative embodiment, the recess 16 is a semi-circular arc structure, which fits the outer circumference of the holding pole 90.

In an optional embodiment, the annular bracket 20 includes a first annular bracket body 21 and a second annular bracket body 22, which are disposed to enclose each other, the first annular bracket body 21 is fixedly connected to the first clasping structure 12, and the second annular bracket body 22 is fixedly connected to the second clasping structure 13.

Referring to fig. 15, further, a plurality of first supporting structures 23 are uniformly distributed on the inner surface of the first annular frame body 21 along the circumference, and the end portions of the first supporting structures 23 are fixedly connected to the first clasping structure 12. A plurality of second supporting structures 24 are uniformly distributed on the inner surface of the second annular frame body 22 along the circumference, and the end parts of the second supporting structures 24 are fixedly connected with the second clasping structure 13. In this embodiment, the number of the first supporting structures 23 and the second supporting structures 24 is three, and the first supporting structures and the second supporting structures are uniformly arranged on the inner surfaces of the first annular frame body 21 and the second annular frame body 22 of the annular support 20 along the circumference, so that the connection between the annular support 20 and the clasping assembly 10 is firmer, and the weight of the whole structure is reduced.

In an optional embodiment, the first annular frame body 21 and the second annular frame body 22 are connected and conducted through a first grounding wire 25, and any one of the first annular frame body 21 and the second annular frame body 22 is connected with a grounding common end through a second grounding wire 26, so that a good grounding effect can be achieved, and the equipment of the omnidirectional antenna system 100 can be prevented from being damaged.

Referring to fig. 15 and 16, in an alternative embodiment, the mounting assembly 30 includes a connecting rod 31, and a first mounting portion 32 and a second mounting portion 33 connected to two ends of the connecting rod 31, wherein the first mounting portion 32 is connected to the loop bracket 20, and the second mounting portion 33 is connected to the antenna structure 50. Optionally, the outer circumferential surface of the ring-shaped bracket 20 is provided with a mounting portion 70 which is matched with the first mounting portion 32 of the mounting assembly 30, optionally, the mounting portion 70 is provided with a positioning groove and one or more first mounting holes 71, the size and shape of the positioning groove are matched with those of the first mounting portion 32, the first mounting portion 32 is provided with one or more second mounting holes 72 which are in one-to-one correspondence with the first mounting holes 71, the first mounting portion 32 and the corresponding mounting portion 70 can be fixed to each other through the first mounting holes 71 and the second mounting holes 72 by bolts, and then the mounting assembly 30 and the ring-shaped bracket 20 are connected to each other.

Further, the second mounting portion 33 of the mounting assembly 30 includes a web 34 connected to the connecting rod 31 and two wing plates 35 vertically connected to two ends of the web 34, two connection plates 80 matched with the wing plates 35 are disposed on the antenna structure 50, the two wing plates 35 are connected to the two connection plates 80 of the antenna structure 50 in a one-to-one correspondence manner, and the mounting assembly 30 is connected to the antenna structure 50.

Referring to fig. 17, in order to adjust the angle of the antenna structure 50, the antenna structure 50 can be obliquely arranged relative to the holding pole 90, so as to adjust the pitch angle of the antenna structure 50 to adapt to a complex environment. The wing plate 35 is provided with a positioning hole 36 and an arc-shaped limiting hole 37, the antenna structure 50 is provided with a first hole matched with the positioning hole 36 and a second hole matched with the arc-shaped limiting hole 37, the first hole and the positioning hole 36 are internally connected with a second fastening piece 81, the second hole and the arc-shaped limiting hole 37 are internally connected with a third fastening piece 82, and the antenna structure 50 is connected with the mounting assembly 30. In addition, the third fastening member 82 is movable in the arc-shaped limiting hole 37 around the second fastening member 81. That is, the antenna structure 50 can rotate around the second fastening member 81 as a rotation axis to drive the third fastening member 82 to move in the arc-shaped limiting hole 37, so as to change the installation angle of the antenna structure 50, and achieve the purpose that the antenna structure 50 can be inclined relative to the holding pole 90. Alternatively, the second fastener 81 and the third fastener 82 may each employ a bolt.

Further, an included angle between two side ends of the arc-shaped limiting hole 37 and a connection line of the positioning hole 36 is greater than or equal to 40 °, that is, the antenna structure 50 may be inclined upward to 20 ° at the maximum relative to the holding pole 90, or inclined downward to 20 ° at the maximum relative to the holding pole 90, and the adjustment angle may be set according to actual needs. In order to be able to precisely adjust the installation angle of the antenna structure 50, the wing plate 35 is further provided with an angle dial 38 corresponding to the radian of the arc-shaped limiting hole 37.

The embodiment of the present invention further provides an unmanned aerial vehicle monitoring device 200, which includes a receiver, a pole 90, and the omnidirectional antenna system 100 described in the foregoing embodiments and implementation manners, where the omnidirectional antenna system 100 may be installed on the pole 90 through the connection device 300 described in the foregoing embodiments and implementation manners, and the omnidirectional antenna system 100 is connected to the receiver through a connection line. It should be noted that the descriptions of the omnidirectional antenna system 100 and the connection device 300 in the above embodiments and implementations are also applicable to the drone listening device 200.

The unmanned aerial vehicle monitoring device 200 of the embodiment of the invention can realize better omnidirectional radiation and signal receiving capability and anti-interference performance in all directions of the horizontal plane through the omnidirectional antenna system 100. The problem that the interception distance of the interception equipment of the common unmanned aerial vehicle is short and the interception capability difference in different directions is obvious can be solved. Meanwhile, the problem that the common unmanned aerial vehicle interception equipment is easily interfered by electromagnetic signal noise can be solved. The unmanned aerial vehicle monitoring and monitoring system can be used in areas where the unmanned aerial vehicle needs to be monitored, such as airports, government office organizations and the like.

Although the embodiments of the present invention have been disclosed with reference to the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various changes and modifications which are equivalent to those of the above-mentioned embodiments without departing from the scope of the embodiments of the present invention.

The disclosure of this patent document contains material which is subject to copyright protection. The copyright is owned by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the patent and trademark office official records and records.