Antenna system of unmanned aerial vehicle jamming gun and unmanned aerial vehicle jamming gun

Abstract

Disclosed in the present invention are an antenna system of an unmanned aerial vehicle jamming gun and the unmanned aerial vehicle jamming gun. The antenna system (1) is integrally arranged in layers, comprising a top layer (2), a middle layer (3) and a bottom layer (4); a structure comprises an omnidirectional detection antenna (11), a detection antenna assembly, a jamming antenna assembly, and a navigation-spoofing antenna (14); the detection antenna assembly comprises a first detection antenna (121) and a second detection antenna (122); the jamming antenna assembly comprises a first jamming antenna (131), a second jamming antenna (132), a third jamming antenna (133), and a fourth jamming antenna (134); the first detection antenna (121), the navigation-spoofing antenna (14) and the third jamming antenna (133) are sequentially and vertically arranged on the top layer (2) at intervals; the second detection antenna (122) and the fourth jamming antenna (134) share a common antenna and are arranged on the middle layer (3); the first jamming antenna (131) and the second jamming antenna (132) are vertically and coplanarly arranged on the bottom layer (4); and the omnidirectional detection antenna (11) is arranged in a region directly in front of the top layer (2) and the middle layer (3). The present invention can achieve direction-finding, jamming, and spoofing of unmanned aerial vehicles within the full frequency band of 300–6000 MHz, and features a compact structure, small size and high portability.

Description

An unmanned aerial vehicle jamming gun antenna system and unmanned aerial vehicle jamming gun

[0001] Cross-reference to Related Applications

[0002] The present application is based on the Chinese patent application with the application date of "2024.07.04", the application number of "202410894031X", and the invention name of "An unmanned aerial vehicle jamming gun antenna system and unmanned aerial vehicle jamming gun", and claims the priority thereof, the whole text of which is hereby incorporated into the present application as a part of the present application.

TECHNICAL FIELD

[0003] The present application mainly relates to the technical field of jamming guns, in particular to an unmanned aerial vehicle jamming gun antenna system and unmanned aerial vehicle jamming gun.

BACKGROUND

[0004] Currently, the signal frequency of commercial unmanned aerial vehicles mainly concentrates in the range of 300MHz-6000MHz, and most of the anti-unmanned aerial vehicle antennas circulating in the market are used for detecting and jamming the mainstream frequency bands such as 433MHz, 840MHz, 915MHz, 2.4GHz, 5.8GHz, etc., but there are also other unmanned aerial vehicle frequencies below 6GHz, such as 5.2GHz, 3.5GHz and other illegal unmanned aerial vehicle frequencies, so there is an urgent need for an anti-unmanned aerial vehicle system to realize an antenna system with full-band detection, full-band attack and navigation deception functions in the range of 300-6000MHz. Before counteracting a black flying unmanned aerial vehicle, it is necessary to first detect the unmanned aerial vehicle. Passive detection uses an antenna to passively receive the electromagnetic wave signal of the unmanned aerial vehicle, and then analyzes and matches the unmanned aerial vehicle feature library to identify unmanned aerial vehicles of different frequencies and different models. It has zero pollution to the surrounding electromagnetic environment, small size, and is widely integrated into portable and handheld jamming devices. However, due to the variety of environmental changes, the jamming device has problems such as poor detection accuracy and discontinuous detection, so it is particularly important to quickly and accurately find and effectively counteract the unmanned aerial vehicle in the full-band range of 300-6000MHz.

[0005] In the prior art, a full-band radio omnidirectional detector, a full-band jamming gun and a deception are often made into independent fixed device systems, which are independent of each other. Wireless radio detection, jamming and deception are integrated through a multi-fusion software platform. Although this can realize the detection, attack and forced landing or driving away of unmanned aerial vehicles in the full-band full-space, the fixed device is large in size and not easy to carry.

[0006] Secondly, in the portable anti-drone system, a multi-antenna is also used to form a full-band jamming, and a 2.4GHz / 5.8GHz directional antenna is used for detection and direction finding. Although it can meet the detection and jamming of most drones, it still cannot meet the detection and direction finding in the full-band range, and cannot meet the full airspace detection and direction finding.

[0007] Currently, the patent application proposed by Shenzhen Saifang Technology Co., Ltd.: Antenna system and anti-drone system equipment CN202310648610.1, the working frequency of the antenna system covers the full-band 400-6000MHz of radio signals, including an omnidirectional reconnaissance antenna, a narrowband directional direction finding antenna, and a full-band strike antenna composed of three wideband directional antennas. The antenna system cannot autonomously detect and identify and strike drones within 300MHz band, and the long-distance direction finding antenna only includes 2.4GHz and 5.8GHz, and cannot realize full-band long-distance directional direction finding for mainstream frequency band 5.2GHz, 1.4GHz, 915MHz, and other frequencies below 6GHz. Only the internal reconnaissance antenna is relied on to realize full-band omnidirectional detection of drones, but due to the large number of antennas in the device system, there is strong coupling between adjacent antennas, and the reconnaissance antenna itself only has medium-distance detection effect on drones with frequency above 2GHz, and the detection effect on drones below 2GHz is also poor. Therefore, the system device cannot realize full-band accurate detection of drones below 2GHz, and cannot realize long-distance detection of drones within 2GHz-6GHz except for 2.4 / 5.8GHz drones, and the antenna system does not have a decoy function, and cannot realize position deception for invading drones.

[0008] In addition, the full-band function is currently realized by the combination of various antennas, but in the combination process, the patent applicant finds that there are still many technical problems or obstacles, such as antenna frequency allocation, antenna quantity, and how to layout multiple antennas. The mainstream frequency of common drones is usually 2.4GHz and 5.8GHz, the antenna polarization is vertical polarization, and it is the most difficult to realize detection and jamming, especially the jamming performance, which depends on the antenna gain and the radio frequency power. Since it is a portable device, the radio frequency strike circuit power cannot be too high, which reduces the high-power electromagnetic radiation to the human body, so the antenna gain needs to be higher at these two frequencies, and the gain of other frequencies also needs to be relatively high. Some technologies use a 2-6GHz wideband antenna to realize 2.4GHz and 5.8GHz, but the gain of a wideband log-periodic antenna can only reach 10dB, which cannot reach more than 12dB, not to mention 5.8GHz which requires 15dB. Moreover, the wideband horn antenna is large in size and heavy, and the wideband vivaldi antenna can achieve high gain, but it is very large in size and difficult to miniaturize.

[0009] Secondly, the mutual coupling between the plurality of antennas will affect the antenna radiation performance, so the layout of the plurality of antennas is the most important, the patent application finds through relevant tests that the following points need to be considered: first: the antenna near the key frequency band cannot have the antenna covering the same frequency, because the antenna isolation will be low, the adjacent mutual coupling is more serious, and the lowest frequency antenna is usually arranged in the middle layer to reduce the influence of each other between the other antennas; second: the front of the main radiation direction of the antenna should not appear metal, because the metal will partially reflect the performance of the radiation, which will affect the antenna gain and standing wave; third: the layered antenna is generally three layers, and the antenna spacing between layers is as wide as possible, but it will increase the weight and affect the customer experience. SUMMARY

[0010] The technical problem to be solved by the present application is that in view of the technical problems existing in the prior art, the present application provides an unmanned aerial vehicle jammer antenna system with simple structure and small size.

[0011] To solve the above technical problems, the technical solution provided by the present application is:

[0012] An unmanned aerial vehicle jammer antenna system, the antenna system is arranged in layers, specifically the top layer, the middle layer and the bottom layer arranged in sequence from top to bottom; the specific structure of the antenna system includes an omnidirectional detection antenna, a detection antenna assembly, a jamming antenna assembly and a navigation deception antenna;

[0013] The detection antenna assembly includes a first detection antenna and a second detection antenna;

[0014] The jamming antenna assembly includes a first jamming antenna, a second jamming antenna, a third jamming antenna and a fourth jamming antenna;

[0015] The first detection antenna, the navigation deception antenna and the third jamming antenna are arranged in the top layer in sequence and spaced apart from top to bottom;

[0016] The second detection antenna and the fourth jamming antenna share an antenna and are arranged in the middle layer;

[0017] The first jamming antenna and the second jamming antenna are arranged in the bottom layer and are coplanar from top to bottom;

[0018] The omnidirectional detection antenna is arranged in the front area of the top layer and the middle layer;

[0019] The first detection antenna is a super wideband miniaturized logarithmic periodic antenna covering a frequency range of 1.5-6GHz; the second detection antenna is a super wideband miniaturized logarithmic periodic antenna covering a frequency range of 300-2000MHz; the omnidirectional detection antenna, the first detection antenna and the second detection antenna cooperate to detect unmanned aerial vehicles in the frequency range of 300-6000MHz.

[0020] As a further improvement of the above technical solution:

[0021] The first interference antenna is a microstrip Yagi antenna, which is a wideband antenna covering a frequency range of 4.8-6.2GHz; the first interference antenna adopts a pitch double-antenna group array form;

[0022] The second interference antenna is a microstrip Yagi antenna, which is a narrowband antenna covering a frequency range of 2.3-2.6GHz; the second interference antenna adopts a pitch double-antenna group array form;

[0023] The third interference antenna is an ultra-wideband antenna, which is an ultra-wideband small-sized logarithmic-periodic antenna covering a frequency range of 1.5-6GHz; the fourth interference antenna is an ultra-wideband antenna, which is an ultra-wideband small-sized logarithmic-periodic antenna covering a frequency range of 300-2000MHz;

[0024] The first interference antenna, the second interference antenna, the third interference antenna, and the fourth interference antenna cooperate to realize interference with a drone in a full frequency range of 300-6000MHz.

[0025] The navigation deception antenna is a wideband antenna, which is a wideband small-sized logarithmic-periodic antenna covering a frequency range of 1.1-1.7GHz.

[0026] The omnidirectional detection antenna is an ultra-wideband omnidirectional elliptical microstrip antenna, which includes a radiation patch, a tapered microstrip feed line, a detection through-hole, and four detection metal vias on the top layer; and includes a detection ground plate and a detection RF connector on the bottom layer;

[0027] The inner core of the detection RF connector is inserted into the detection through-hole of the top layer structure and is welded on the top layer tapered microstrip feed line; the outer core of the RF connector is connected with the detection ground plate, and the four pins of the outer core are inserted into the four detection metal vias above the top layer and are welded with the detection metal vias; the detection RF connector is a back-insertion type feed.

[0028] The first detection antenna is a double-panel, which includes a plurality of first radiation arrays, a first top layer feed line, a first feed point, a first RF connector, and a first top layer ground plate on the top layer;

[0029] The bottom layer includes a first bottom layer feed line, a first metal via, a first bottom layer ground plate, a first through-hole, a first microstrip line, and a bottom layer metal via;

[0030] The first radio frequency connector is inserted into the top layer plug-in feed, the inner core of the first radio frequency connector is inserted into the first through hole of the bottom layer structure and welded with the first microstrip line, the outer core of the first radio frequency connector is connected with the first top layer ground plate, four pins of the outer core are inserted into four bottom layer metal vias of the bottom layer and welded with the bottom layer metal vias, and meanwhile the first top layer ground plate is conductively connected with the first bottom layer ground plate through the first metal via.

[0031] The second probe antenna is a double panel, the top layer includes a second feed point, a plurality of second radiation array elements, a second top layer feed line, a second metal via, a surface-mounted resistor, a second top layer ground plate and a slotted rectangular block;

[0032] The second top layer ground plate is conductively connected with the bottom layer radiation array element through the second metal via; the inner core of the radio frequency coaxial line is inserted from the second feed point and welded on the second top layer feed line, and the outer core of the radio frequency coaxial line is welded on the second bottom layer feed line.

[0033] The navigation deception antenna is a double panel; the top layer includes a plurality of radiation array elements, a third top layer feed line, a third feed point, a third radio frequency connector and a third top layer ground plate;

[0034] The bottom layer includes a third bottom layer feed line, a third metal via, a second bottom layer ground plate, a second through hole, a second microstrip line and a fourth metal via;

[0035] The third radio frequency connector is inserted into the top layer plug-in feed, the inner core of the third radio frequency connector is inserted into the second through hole of the bottom layer structure and welded with the second microstrip line, the outer core of the third radio frequency connector is connected with the third top layer ground plate, four pins of the outer core are inserted into four fourth metal vias of the bottom layer and welded with the fourth metal vias, and meanwhile the third top layer ground plate is conductively connected with the second bottom layer ground plate through the third metal via;

[0036] One end of the inner core of the long radio frequency line is welded with the second microstrip line, and the other end of the inner core is fed from the front end third feed point and welded with the third top layer feed line; one end of the outer core of the long radio frequency line is welded with the second bottom layer ground plate, and the other end is welded with the foremost feed line of the third bottom layer feed line.

[0037] The application also discloses an unmanned aerial vehicle jamming gun, which comprises a receiving and detecting circuit, a jamming and striking circuit, a navigation deception circuit and an antenna system of the unmanned aerial vehicle jamming gun.

[0038] Compared with the prior art, the application has the following advantages:

[0039] The present application solves the problem of miniaturization of the antenna system in the case of high gain, in the form of the antenna, the first interference antenna adopts double-Yagi antenna array to realize 4.8-6.2GHz high gain performance, the second interference antenna adopts double-Yagi antenna array to realize 2.3-2.6GHz high gain performance, to realize the precise suppression interference of 2.4GHz, 5.2GHz, 5.8GHz unmanned aerial vehicle at a long distance; at the same time, a 1.5-6GHz logarithmic periodic antenna (the third interference antenna 133) is used to cover 1.5-6GHz full frequency band, to meet the suppression attack of other illegal frequency unmanned aerial vehicle.

[0040] Secondly, in the form of each detection antenna, the 1.5-6GHz detection antenna also adopts a wideband logarithmic periodic antenna, which is more easy to realize miniaturization than other antennas, so as to facilitate the coplanar design with other antennas; the navigation deception antenna covers the frequency of 1.1-1.7GHz, which is also a wideband antenna, and therefore the logarithmic periodic antenna is used to realize it.

[0041] Finally, the omnidirectional detection antenna of the present application is made of printed PCB circuit board, which is similar to the antenna with dipole performance, and its advantages are simple processing, small size and light weight.

[0042] In the structural layout of each antenna of the present application, each antenna is vertically polarized; secondly, the low-frequency 300-2000MHz antenna (the second detection antenna) is arranged in the middle layer, and the first interference antenna of 4.8-6.2GHz and the second interference antenna of 2.3-2.6GHz are arranged on one side (the bottom layer); the third interference antenna, the first detection antenna and the navigation deception antenna are arranged on the other side (the top layer). Since the third interference antenna and the first detection antenna are both 1.5-6GHz, they are the same frequency antennas, and therefore the third interference antenna and the first detection antenna are arranged at the upper and lower ends to reduce the coupling between the antennas.

[0043] The omnidirectional detection antenna of the present application is arranged in the front area of the top layer and the middle layer, and by means of the beam performance of the interference antenna, the all-around coverage of 2.4GHz, 5.2GHz and 5.8GHz is ensured; on the other hand, the omnidirectional detection antenna is arranged in the front area of the top layer and the middle layer, and the main advantages are as follows:

[0044] Firstly, the arrangement of the omnidirectional detection antenna in the front area of the top layer and the middle layer can save more space;

[0045] Second: The omnidirectional detection antenna is arranged below the front area of the top layer and the middle layer, mainly away from the key frequency band antennas 4.8-6.2GHz and 2.3-2.6GHz, so as to increase the isolation of the key frequency band and ensure the interference suppression effect of 2.4GHz, 5.2GHz and 5.8GHz.

[0046] The present application solves the mutual coupling problem of each antenna through the layout of the whole antenna system, realizes high isolation, ensures maximum energy transmission of the antenna, and further realizes long-distance detection and suppression interference of the unmanned aerial vehicle.

[0047] The present application realizes direction finding, attack and deception of the unmanned aerial vehicle in the whole frequency band of 300-6000MHz through the cooperation of the omnidirectional detection antenna, the detection antenna assembly, the interference antenna assembly and the navigation deception antenna, has long detection distance, good direction finding effect and strong interference effect, and has compact overall structure, small volume and easy to carry.

DRAWINGS

[0048] Fig. 1 is a topological structure diagram of the antenna system of the present application in the embodiment.

[0049] Fig. 2 is a structural schematic diagram of the antenna system of the present application in the embodiment.

[0050] Fig. 3 is a structural diagram of the omnidirectional detection antenna of the present application in the embodiment.

[0051] Fig. 4 is a port return loss diagram of the omnidirectional detection antenna of the present application in the embodiment.

[0052] Fig. 5 is a part of frequency gain curve diagram of the omnidirectional detection antenna of the present application in the embodiment.

[0053] Fig. 6 is a radiation pattern diagram of the omnidirectional detection antenna of the present application at 1.43GHz.

[0054] Fig. 7 is a radiation pattern diagram of the omnidirectional detection antenna of the present application at 2.45GHz.

[0055] Fig. 8 is a radiation pattern diagram of the omnidirectional detection antenna of the present application at 5.2GHz.

[0056] Fig. 9 is a radiation pattern diagram of the omnidirectional detection antenna of the present application at 5.8GHz.

[0057] Fig. 10 is an upper layer diagram of the top layer of the antenna system of the present application in the embodiment.

[0058] Fig. 11 is a lower layer diagram of the top layer of the antenna system of the present application in the embodiment.

[0059] Fig. 12 is a port return loss diagram of the first detection antenna of the present application in the embodiment.

[0060] Figure 13 is a gain curve of the first probe antenna of the present application in an embodiment.

[0061] Figure 14 is a radiation pattern of the first probe antenna of the present application at 2.45 GHz.

[0062] Figure 15 is a radiation pattern of the first probe antenna of the present application at 5.8 GHz.

[0063] Figure 16 is a block diagram of the radio receiver module in the receive detection circuit of the present application.

[0064] Figure 17 is a block diagram of the jammer strike circuit of the present application.

[0065] Figure 18 is a port return loss plot of the navigation decoy antenna of the present application in an embodiment.

[0066] Figure 19 is a radiation pattern of the navigation decoy antenna of the present application at 1.24 GHz.

[0067] Figure 20 is a radiation pattern of the navigation decoy antenna of the present application at 1.58 GHz.

[0068] Figure 21 is an embodiment of the navigation decoy antenna of the present application in a specific application.

[0069] Figure 22 is a structure diagram of the second probe antenna of the present application in an embodiment.

[0070] Figure 23 is a diagram of the specific installation structure of the surface mount resistor of the present application.

[0071] Figure 24 is a port return loss plot of the second probe antenna of the present application in an embodiment.

[0072] Figure 25 is a gain curve of the second probe antenna of the present application in an embodiment.

[0073] Figure 26 is a radiation pattern of the second probe antenna of the present application at 900 MHz.

[0074] Figure 27 is a radiation pattern of the second probe antenna of the present application at 1.43 GHz.

[0075] Figure 28 is an embodiment of the second probe antenna of the present application in a specific application.

[0076] Figure 29 is a structure diagram of the bottom layer of the antenna system of the present application in an embodiment.

[0077] Figure 30 is a port return loss plot of the first jammer antenna of the present application in an embodiment.

[0078] Figure 31 is a gain curve of the first jammer antenna of the present application at various frequency points.

[0079] Figure 32 is a radiation pattern of the first jamming antenna of the present application at 5.2 GHz.

[0080] Figure 33 is a radiation pattern of the first jamming antenna of the present application at 5.8 GHz.

[0081] Figure 34 is a port return loss plot of the second jamming antenna of the present application at an embodiment.

[0082] Figure 35 is a radiation pattern of the second jamming antenna of the present application at 2.45 GHz.

[0083] Figure 36 is a block diagram of the structure of the jamming gun of the present application at an embodiment.

[0084] Legend: 1, antenna system; 2, top layer; 3, middle layer; 4, bottom layer; 11, omnidirectional detection antenna; 111, radiating patch; 112, tapered microstrip feed line; 113, detection via hole; 114, detection metal via; 115, detection ground plate; 116, detection RF connector; 121, first probe antenna; 1211, first feed point; 1212, first radiating element; 1213, first top layer feed line; 1214, first RF connector; 1215, first top layer ground plate; 1216, first bottom layer feed line; 1217, first metal via; 1218, first bottom layer ground plate; 1219, first via hole; 1220, first microstrip line; 1221, bottom layer metal via; 122, second probe antenna; 12201, second feed point; 1222, second radiating element; 1223, second top layer feed line; 1224, second metal via; 1225, surface mount resistor; 1226, second top layer ground plate; 1227, slotted rectangular block; 131, first jamming antenna; 1311, first radiating element; 1312, first active element; 1313, first power divider; 1314, first ground plate; 1315, first jamming RF connector; 132, second jamming antenna; 1321, second radiating element; 1322, second active element; 1323, second power divider; 1324, second ground plate; 1325, second jamming RF connector; 1326, third active element; 133, third jamming antenna; 134, fourth jamming antenna; 14, navigation decoy antenna; 141, third feed point; 142, radiating element; 143, third top layer feed line; 144, third RF connector; 145, third top layer ground plate; 146, third bottom layer feed line; 147, third metal via; 148, second bottom layer ground plate; 149, second via hole; 150, second microstrip line; 151, fourth metal via; 5, reception detection circuit; 6, jamming strike circuit; 7, navigation decoy circuit.

DETAILED DESCRIPTION

[0085] The application will be further described in conjunction with the accompanying drawings and specific embodiments of the application.

[0086] As shown in FIGS. 1-2, the antenna system of the UAV jamming gun of the embodiment of the application comprises an omnidirectional detection antenna 11, a detection antenna assembly, a jamming antenna assembly and a navigation deception antenna 14; wherein the antenna system 1 is arranged in layers as a whole, specifically, top layer 2, middle layer 3 and bottom layer 4 arranged in order from top to bottom; specifically, the detection antenna assembly comprises first detection antenna 121 and second detection antenna 122; the jamming antenna assembly comprises first jamming antenna 131, second jamming antenna 132, third jamming antenna 133 and fourth jamming antenna 134;

[0087] The first detection antenna 121, the navigation deception antenna 14 and the third jamming antenna 133 are arranged in order from top to bottom in a plane according to a certain interval, and are arranged in the top layer 2 as a whole;

[0088] The second detection antenna 122 and the fourth jamming antenna 134 share an antenna, and are arranged in the middle layer 3 as a whole;

[0089] The first jamming antenna 131 and the second jamming antenna 132 are arranged in a plane according to a certain interval from top to bottom, and are arranged in the bottom layer 4 as a whole;

[0090] The omnidirectional detection antenna 11 is arranged in the front area of the top layer 2 and the middle layer 3 according to a certain interval; the interval is determined according to the antenna performance, the antenna size and the overall equipment weight;

[0091] The top layer 2, the middle layer 3 and the bottom layer 4 are arranged in the antenna system 1 according to a preset interval; the specific preset interval is determined according to the antenna performance, the antenna height and the overall equipment weight.

[0092] Specifically, the first detection antenna 121 is a super wideband miniaturized logarithmic-periodic antenna, covering a frequency range of 1.5-6GHz; the second detection antenna 122 is a super wideband miniaturized logarithmic-periodic antenna, covering a frequency range of 300-2000MHz; the omnidirectional detection antenna 11, the first detection antenna 121 and the second detection antenna 122 can realize the detection and direction finding function of the UAV in the full frequency range of 300-6000MHz.

[0093] Specifically, the first interference antenna 131 is a microstrip Yagi antenna and is a wideband antenna covering a frequency range of 4.8-6.2 GHz; the first interference antenna 131 adopts a form of a double-antenna group array in the elevation direction. The second interference antenna 132 is a microstrip Yagi antenna and is a narrowband antenna covering a frequency range of 2.3-2.6 GHz; the second interference antenna 132 adopts a form of a double-antenna group array in the elevation direction. The third interference antenna 133 is an ultra-wideband antenna, and the antenna form is an ultra-wideband miniaturized logarithmic periodic antenna, covering a frequency range of 1.5-6 GHz. The fourth interference antenna 134 is an ultra-wideband antenna, and the antenna form is an ultra-wideband miniaturized logarithmic periodic antenna, covering a frequency range of 300-2000 MHz. The first interference antenna 131, the second interference antenna 132, the third interference antenna 133 and the fourth interference antenna 134 can realize suppression attack functions on the unmanned aerial vehicle in the full frequency range of 300-6000 MHz.

[0094] Specifically, the navigation deception antenna 14 is a wideband antenna, and the antenna form is a wideband miniaturized logarithmic periodic antenna, covering a frequency range of 1.1-1.7 GHz. The navigation deception antenna 14 can realize interference on the GPS of the unmanned aerial vehicle and position deception.

[0095] In order to solve the problem that the antenna system is difficult to be miniaturized in the case of realizing high gain at present, in the antenna form, the first interference antenna 131 realizes 4.8-6.2 GHz high gain performance by adopting a double-Yagi antenna group array, the second interference antenna 132 realizes 2.3-2.6 GHz high gain performance by adopting a double-Yagi antenna group array, and the remote precise suppression interference on the unmanned aerial vehicle of 2.4 GHz, 5.2 GHz and 5.8 GHz is realized. Meanwhile, a 1.5-6 GHz logarithmic periodic antenna (the third interference antenna 133) is adopted to cover the full frequency range of 1.5-6 GHz, so as to satisfy the suppression attack on the unmanned aerial vehicle of other illegal frequencies.

[0096] Secondly, in the form of each detection antenna, the 1.5-6 GHz detection antenna also adopts a wideband logarithmic periodic antenna, and is more easy to realize miniaturization than other antennas, so as to facilitate the coplanar design with other antennas; the navigation deception antenna 14 covers a frequency of 1.1-1.7 GHz and is also a wideband antenna, and therefore the logarithmic periodic antenna is realized considering the overall layout.

[0097] Finally, for the omnidirectional detection antenna 11, the conventional omnidirectional wideband antenna is a dipole antenna, a single-cone antenna, a double-cone antenna and the like, but the single-cone antenna and the double-cone antenna are metal antennas, and the longitudinal width is large, and the single-cone antenna also needs a metal reflecting plate, therefore the omnidirectional detection antenna 11 of the present application is made of a printed PCB circuit board, and is similar to the antenna with the performance of a dipole, and the advantage is that the processing is simple, the volume is small, and the weight is light.

[0098] In terms of structural layout, first, the antenna polarization is considered, each antenna is vertically polarized, which is determined by the antenna of the unmanned aerial vehicle itself;

[0099] Secondly, the intermediate layer 3 of the present application is arranged with a low-frequency 300-2000MHz antenna (second detection antenna 122), and a first interference antenna 131 of 4.8-6.2GHz and a second interference antenna 132 of 2.3-2.6GHz are arranged on the side (bottom layer); the other side (top layer) is a third interference antenna 133 of 1.5-6GHz, a first detection antenna 121 and a navigation deception antenna 14. Since the third interference antenna 133 and the first detection antenna 121 are both 1.5-6GHz, they are the same frequency antennas, so the third interference antenna 133 and the first detection antenna 121 are arranged at the upper and lower ends to reduce the coupling between the antennas.

[0100] Finally, the layout of the omnidirectional detection antenna 11 is also a technical difficulty. From the radiation pattern of the omnidirectional detection antenna 11, the directivity of the frequency below 3GHz is better, and the maximum radiation direction is at the front end of the antenna; the directivity of 5.2GHz and 5.8GHz is slightly worse, and the maximum radiation direction is at the ±90° direction of the antenna, so the omnidirectional detection antenna 11 is arranged in the front area of the top layer and the intermediate layer, and the beam performance of the interference antenna is used to ensure the omnidirectional coverage of 2.4GHz, 5.2GHz and 5.8GHz. On the other hand, the omnidirectional detection antenna 11 is arranged in the front area of the top layer and the intermediate layer, which has two main advantages:

[0101] First, arranging directly above the intermediate layer and directly below the intermediate layer will cause the overall structure to be too high and heavy, while arranging the omnidirectional detection antenna 11 in the front area of the top layer and the intermediate layer will save more space;

[0102] Second, arranging the omnidirectional detection antenna 11 below the front area of the top layer 2 and the intermediate layer 3 increases the isolation of the key frequency bands 4.8-6.2GHz and 2.3-2.6GHz, and ensures the interference suppression effect of 2.4GHz, 5.2GHz and 5.8GHz.

[0103] Through the above layout of the entire antenna system, the mutual coupling problem of each antenna is solved, high isolation is achieved, the maximum energy transmission of the antenna is ensured, and remote detection and suppression interference of the unmanned aerial vehicle are realized.

[0104] The antenna system of the unmanned aerial vehicle interference gun of the present application, through cooperation of the omnidirectional detection antenna 11, the detection antenna assembly, the interference antenna assembly and the navigation deception antenna 14, can not only satisfy direction finding, attack and deception deception of the unmanned aerial vehicle in the full frequency band of 300-6000MHz, but also has long detection distance, good direction finding effect and strong interference effect, and has compact overall structure, small size and easy portability.

[0105] As shown in Fig. 36, the present application also provides an unmanned aerial vehicle interference gun, which comprises the antenna system 1, the detection circuit 5, the interference attack circuit 6 and the navigation deception circuit 7 as described above; the detection circuit 5 is connected with the first detection antenna 121, the second detection antenna 122 and the omnidirectional detection antenna 11 in the antenna system 1 respectively; the interference attack circuit 6 is connected with the navigation deception antenna 14, the third interference antenna 133, the fourth interference antenna 134, the first interference antenna 131 and the second interference antenna 132 in the antenna system 1 respectively; the navigation deception circuit 7 is connected with the navigation deception antenna 14. The antenna system 1 receives the radio signal frequency of the invading unmanned aerial vehicle in the full frequency band, and transmits the same frequency signal as the radio signal;

[0106] The detection circuit 5 comprises a radio receiving module and a digital signal processing module; the radio receiving module receives the radio unmanned aerial vehicle signal in the full frequency band, and performs processing such as amplitude limiting, on-off filtering, multi-stage amplification, digital control attenuation on the signal; the digital signal processing module performs baseband processing on the amplified signal, and analyzes the specific model information and the signal frequency of the unmanned aerial vehicle;

[0107] The interference attack circuit 6 comprises a signal power amplification module and an attenuation module, generates the interference signal of the specific frequency of the unmanned aerial vehicle through the specific model information and the signal frequency information of the unmanned aerial vehicle analyzed, and sends the signal to the corresponding interference antenna through signal amplification and attenuation;

[0108] The navigation deception circuit 7 comprises a GPS interference circuit and a deception circuit; the GPS interference circuit is to interfere with the GPS information of the unmanned aerial vehicle, so as to force the unmanned aerial vehicle to force landing or return; the deception circuit is to generate a position signal damaging the unmanned aerial vehicle through the signal information of the unmanned aerial vehicle analyzed, simulate the current false satellite signal, and send a false position information to realize the deception function of the position of the unmanned aerial vehicle.

[0109] The unmanned aerial vehicle interference gun of the present application comprises the antenna system 1 as described above, and also has the advantages of the antenna system 1 as described above.

[0110] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0111] Figure 3 is a structure diagram of the omnidirectional detection antenna 11. The omnidirectional detection antenna 11 is an ultra-wideband omnidirectional elliptical microstrip antenna. Compared with other omnidirectional antennas (such as single-cone antennas, double-cone antennas, etc.), the elliptical microstrip antenna has a smaller volume, a more compact structure, and a higher integration level.

[0112] The medium material is printed on a high-frequency microwave circuit substrate, and the antenna is a double-sided panel, specifically including a top layer and a bottom layer. The top layer includes an elliptical radiation patch 111, a tapered microstrip feed line 112, a detection through hole 113, and four detection metal vias 114. The bottom layer includes a detection ground plate 115 and a 50-ohm detection RF connector 116. The detection ground plate 115 is a special-shaped structure, which is a combination of an elliptical sector and a trapezoidal structure.

[0113] The antenna of the omnidirectional detection antenna 11 is fed from the bottom layer by the detection RF connector 116. The inner core of the detection RF connector 116 is inserted into the detection through hole 113 of the top layer structure and welded on the top layer tapered microstrip feed line 112. The outer core of the detection RF connector 116 is connected to the bottom layer detection ground plate 115, and the four pins of the outer core are inserted into the four detection metal vias 114 above the top layer and welded with the detection metal vias 114. The detection RF connector 116 adopts a back insertion type feed, which is beneficial to save space during the connector assembly process compared with end feeding.

[0114] Figure 4 is a port return loss diagram of the omnidirectional detection antenna 11, which basically meets the return loss <-10dB within 1.1-6GHz. Figure 5 shows the part gain frequency point curve diagram within 1-6GHz, which shows that the elliptical microstrip antenna has a high gain within the frequency band of 1-6GHz, and the antenna gain is still -0.4dB at 1GHz, which still has a detection effect. Figure 6 shows the radiation pattern at the frequency point 1.43GHz. From the pattern, it can be seen that the elliptical microstrip antenna has a radiation characteristic similar to that of a dipole antenna. It has good omnidirectional radiation characteristics in the azimuth plane.

[0115] From the azimuth plane pattern of the 2.45GHz antenna in Figure 7, it still has good omnidirectional radiation characteristics, but at high frequencies of 5.2GHz or 5.8GHz, the azimuth plane pattern of the antenna is distorted, but still has good omnidirectional radiation characteristics. Only the majority of the antenna's energy is concentrated in the left and right side regions, as shown in Figures 8-9.

[0116] From the above results, it can be seen that the omnidirectional detection antenna 11 can detect the mainstream unmanned aerial vehicle radio frequency range, and has good omnidirectional radiation characteristics in the azimuth plane. The maximum gain of 2.4GHz is 3.6dB, and the maximum gain of 5.8GHz is 5.6dB. It can detect and warn the intruding unmanned aerial vehicle in advance, and has high gain and radiation effect.

[0117] The detection radio frequency connector 116 can be connected to an external radio frequency circuit through a radio frequency line. The radio frequency circuit is a receiving detection circuit 5, which includes a radio receiving module and a digital signal processing module. The radio receiving module receives full-band unmanned aerial vehicle signals and performs amplitude limiting, switch filtering, multi-stage amplification, digital control attenuation and other processing on the signals. The amplitude limiter uses a chip to prevent the back-end chip from being burned out due to excessive received signals. The digital control attenuator is used to prevent link saturation. The digital signal processing module performs baseband processing on the amplified signals to analyze the specific model information and signal frequency of the unmanned aerial vehicle.

[0118] FIG. 10 is an upper layer diagram of the top layer 2 integrated layout structure, and FIG. 11 is a lower layer diagram of the top layer 2 integrated layout structure.

[0119] The top layer 2 is sequentially provided with a first detection antenna 121, a navigation deception antenna 14 and a third interference antenna 133 from top to bottom.

[0120] The first detection antenna 121 covers a frequency range of 1.5-6 GHz, and the antenna form is designed by using a super wideband logarithmic periodic antenna. According to a theoretical formula, to obtain a relatively optimal antenna directivity coefficient, a proportional factor τ and an interval factor σ need to be combined to make the antenna obtain a relatively optimal radiation characteristic. Considering the influence of the antenna size, the proportional factor τ of the first detection antenna 121 can be taken in a range of 0.8-0.94, and the interval factor σ can be taken in a range of 0.05-0.3. According to the theory, the theoretical simulation of the antenna full-band gain is greater than 9 dB. The longest array element length of the back end of the first detection antenna 121 is determined by the low-frequency wavelength, so the top is loaded with a bending process to increase the current path length, so as to reduce the antenna frequency and shorten the size of the antenna in the vertical direction.

[0121] Specifically, the medium material is printed by high-frequency microwave circuit substrate, and the antenna is a double-sided panel. The top layer includes a plurality of first radiation elements 1212, a first top layer feed line 1213, a first feed point 1211, a first radio frequency connector 1214, and a first top layer ground plate 1215. The bottom layer includes a first bottom layer feed line 1216, a first metal via 1217, a first bottom layer ground plate 1218, a first through hole 1219, a 50-ohm first microstrip line 1220, and a bottom layer metal via 1221. The first radio frequency connector 1214 is inserted from the top layer feed, the inner core of the first radio frequency connector 1214 is inserted into the first through hole 1219 of the bottom layer structure, and is welded with the 50-ohm first microstrip line 1220; the outer core of the first radio frequency connector 1214 is connected with the first top layer ground plate 1215, the four pins of the outer core are inserted into the four bottom layer metal vias 1221 of the bottom layer, and are welded with the bottom layer metal via 1221, and at the same time the first top layer ground plate 1215 is conductively connected with the first bottom layer ground plate 1218 through the first metal via 1217.

[0122] The first radio frequency connector 1214 is connected with the first probe antenna 121 through a long radio frequency line, more specifically, one end of the inner core of the long radio frequency line is welded with the first microstrip line 1220, and the other end of the inner core is fed from the first feed point 1211 of the front-end antenna and is welded with the first top layer feed line 1213. The outer core of the long radio frequency line is welded with the first bottom layer ground plate 1218 at one end, and is welded with the first bottom layer feed line 1216 at the other end. The transition from the balanced double line of the logarithmic-periodic antenna to the first microstrip line 1220 is realized. Compared with the traditional feeding form of the logarithmic-periodic antenna, the above-mentioned feeding form adopts SMA welding, which is easy to be electrically connected with the rear-end radio frequency circuit, and at the same time avoids the inconvenience of disassembly caused by the traditional long welding radio frequency line.

[0123] Fig. 12 is a port return loss of the first probe antenna 121 at 1.5-6GHz. Fig. 13 is a gain curve diagram at different frequency points, Fig. 14 is a two-dimensional radiation pattern of the first probe antenna 121 at 2.45GHz, and Fig. 15 is a two-dimensional radiation pattern of the first probe antenna 121 at 5.8GHz. From the antenna return loss, it can be seen that the return loss of the first probe antenna 121 at 1.5-6GHz satisfies less than -10dB, which can cover the 1.5-6GHz radio frequency range, and the directional diagram in the frequency band has a high gain, the maximum gain at 2.45GHz is 9.9dB, and the maximum gain at 5.8GHz is 10.3dB. The unmanned aerial vehicle can be detected for the front intrusion, the direction of the unmanned aerial vehicle can be determined by using the rotation function and the compass of the system equipment, and the direction-finding accuracy of the system can be improved.

[0124] The 2.45GHz radiation pattern tilt beam asymmetry in the application is mainly due to more antennas in the system device. Considering the system volume and the influence of key frequency points, three antennas are integrated on the top layer 2. The first detection antenna 121 on the top layer is asymmetric in the tilt direction and is affected by the coupling of the adjacent antenna, so the tilt beam will deviate from the center, but the overall azimuth gain of 2.45GHz is still greater than 8dB, which does not affect the overall 2.4GHz detection effect.

[0125] The first radio frequency connector 1214 is connected to the external radio frequency circuit through the radio frequency line. At this time, the radio frequency circuit is a receiving detection circuit 5. The receiving detection circuit 5 includes a radio receiving module and a digital signal processing module. As shown in FIG. 16, the radio receiving module receives 1.5-6GHz unmanned aerial vehicle signals and performs amplitude limiting, switch filtering, multi-stage amplification, digital control attenuation and other processing on the signals. Among them, the amplitude limiter uses a chip to prevent the back-end chip from being burned out due to receiving a signal that is too large. The digital control attenuator is used to prevent link saturation. The digital signal processing module performs baseband processing on the amplified signals to analyze the specific model information and signal frequency of the unmanned aerial vehicle.

[0126] More specifically, since the omnidirectional detection antenna 11 includes 1-6GHz, the omnidirectional detection antenna 11 shares a receiving detection circuit 5 with the first detection antenna 121. After entering the receiving detection circuit 5, it passes through a one-to-two switch and then enters the amplitude limiter and the like.

[0127] Specifically, by translating the first detection antenna 121 in the vertical direction by a certain interval, i.e., the third interference antenna 133, the coverage frequency of the third interference antenna 133 is 1.5-6GHz. The interval is considered according to the overall three-layer antenna, and the vertical width of the top layer is not greater than that of the other two layers. The third interference antenna 133 has the same structure as the first detection antenna 121, and will not be described here.

[0128] The radio frequency connector in the third interference antenna 133 can be connected to the external radio frequency circuit through the radio frequency line. At this time, the radio frequency circuit is an interference attack circuit 6. As shown in FIG. 17, the interference attack circuit 6 mainly completes power amplification and link matching of the signal, including a power amplification module and an attenuation module. By analyzing the specific frequency information of the unmanned aerial vehicle, an interference signal of the determined frequency of the unmanned aerial vehicle is generated, and the signal is sent to the corresponding interference antenna through the signal amplification and attenuation function in the circuit.

[0129] As shown in FIGS. 10-11, the navigation deception antenna 14 on the top layer 2, specifically the antenna shared by the navigation GPS interference antenna and the deception antenna. The navigation deception antenna 14 covers the frequency of 1.1-1.7GHz, mainly aiming at 1160-1300MHz, 1550-1650MHz unmanned aerial vehicle signals, including GPS L1 (the global satellite positioning system of the United States), BDS B1 (the Beidou satellite navigation system of China), GLONASS L1 (the satellite navigation system of Russia) and Galileo E1 (the Galileo satellite navigation system of the European Union).

[0130] The antenna form is also designed by using a super wideband log-periodic antenna. According to the theoretical formula, in order to obtain a better antenna directivity coefficient, the scale factor τ and the interval factor σ need to be combined with a better directivity coefficient to make the antenna obtain better radiation characteristics. According to the theory, the theoretical simulation of the gain of the antenna in the full frequency band is greater than 8.5dB. In order to realize miniaturization, the top of the long array element at the rear end of the navigation deception antenna 14 is loaded with a capacitor. By changing the current antinode point on the radiation array element, the current path length of the radiation array element is equivalent to be increased, so as to reduce the frequency of the antenna, and then shorten the size of the antenna in the vertical direction.

[0131] Among them, the medium material of the navigation deception antenna 14 is printed by using a high-frequency microwave circuit substrate, and the antenna is a double-sided panel. The top layer includes a plurality of radiation array elements 142, a third top layer feed line 143, a third feed point 141, a third radio frequency connector 144, and a third top layer ground plate 145; the bottom layer includes a third bottom layer feed line 146, a third metal via 147, a second bottom layer ground plate 148, a second through hole 149, a second microstrip line 150, and a fourth metal via 151.

[0132] The third radio frequency connector 144 is inserted from the top layer plug-in feed, the inner core of the third radio frequency connector 144 is inserted into the second through hole 149 of the bottom layer structure, and is welded with the second microstrip line 150, the outer core of the third radio frequency connector 144 is connected with the third top layer ground plate 145, the four pins of the outer core are inserted into the four fourth metal vias 151 of the bottom layer, and are welded with the fourth metal vias 151, at the same time, the third top layer ground plate 145 is conductively connected with the second bottom layer ground plate 148 through the third metal via 147.

[0133] The third radio frequency connector 144 is connected with the antenna through a long radio frequency wire. More specifically, the inner core of one end of the long radio frequency wire is welded with the second microstrip line 150, and the inner core of the other end is fed from the third feed point 141 of the front-end antenna to be welded with the third top-layer feed line 143. The outer core of one end of the long radio frequency wire is welded with the second bottom-layer ground plate 148, and the outer core of the other end is welded with the front-end feed line of the third bottom-layer feed line 146. The transition from the balanced double-line of the log-periodic antenna to the second microstrip line 150 is realized. Compared with the traditional feeding mode of the log-periodic antenna, the feeding mode of the present application adopts SMA welding, which is easy to be electrically connected with the rear-end radio frequency circuit, and at the same time, the inconvenience of disassembly caused by the traditional long radio frequency wire welding is avoided.

[0134] Fig. 18 is the port return loss of the navigation deception antenna 14 at 1.1-1.7 GHz. From the 1.1-1.7 GHz frequency band, the port return loss basically satisfies S11<-10 dB, and low-loss transmission can be realized. Figs. 19 and 20 are the radiation patterns of the navigation deception antenna 14 at 1.24 GHz and 1.58 GHz. It can be seen from the figures that the gain of 1.24 GHz is 4.3 dB, and the gain of 1.58 GHz is 8.3 dB. The navigation deception antenna 14 is in the center of the top layer 2, and thus is affected by the two adjacent antennas. Therefore, the antenna gain will be slightly lower than the theoretical gain of the unit antenna. At the same time, due to the effect of the top-end capacitance loading, the low-frequency gain is low, but the gain of 1.24 GHz is still more than 4 dB, and still has good interference and deception ability.

[0135] The navigation deception antenna 14 can effectively implement the functions of unmanned aerial vehicle forced landing, heading induction, prohibition of take-off, and navigation satellite signal interference, etc. for the 1160-1300 MHz and 1550-1650 MHz unmanned aerial vehicle signals including GPS L1, BDS B1, GLONASS L1, and Galileo E1.

[0136] As shown in Fig. 21, the navigation deception antenna 14 can be connected with the external radio frequency circuit through the third radio frequency connector 144. At this time, the radio frequency circuit is the interference striking circuit 6 and the deception circuit, respectively. The frequency range of the interference striking circuit 6 and the deception circuit is the same as that of the navigation deception antenna 14, which is 1.1-1.7 GHz, and the corresponding circuit is entered through the switch gating. The interference striking circuit 6 mainly interferes with the GPS information of the unmanned aerial vehicle to force the unmanned aerial vehicle to land or return. The deception circuit generates a position signal that destroys the unmanned aerial vehicle by analyzing the unmanned aerial vehicle signal information, simulates the current false satellite signal, and sends a false position information to realize the deception function of the position of the unmanned aerial vehicle.

[0137] The middle layer 3 is arranged with a second probe antenna 122, that is, a fourth interference antenna 134, which is switched to the receiving detection circuit 5 or the interference striking circuit 6 through the switch. The second probe antenna 122 covers the frequency range of 300-2000MHz.

[0138] The second probe antenna 122 covers the frequency range of 300-2000MHz, and the antenna form is designed by using a super-wideband miniaturized logarithmic periodic antenna. According to the theory, the theoretical simulation of the antenna gain in the full frequency band is greater than 5dB.

[0139] The medium material is printed by using a high-frequency microwave circuit substrate, and the antenna is a double-sided panel. In FIGS. 22 and 23, the top layer includes a second feeding point 12201, a plurality of second radiation elements 1222, a second top layer feeding line 1223, a second metal via 1224, a surface-mounted resistor 1225, a second top layer ground plate 1226, and a slotted rectangular block 1227. The second top layer ground plate 1226 is conductively connected to the bottom layer radiation elements through the second metal via 1224. The second probe antenna 122 is fed by a 50-ohm radio frequency coaxial line, the inner core of the radio frequency coaxial line is inserted from the second feeding point 12201 at the front end of the antenna, and is welded on the second top layer feeding line 1223, and the outer core of the radio frequency coaxial line is welded on the bottom layer feeding line.

[0140] Since the vertical direction wide size of the symmetrical array is determined by the half wavelength of the lowest frequency of the first array, since the air half wavelength of the lowest frequency 300MHz is 0.5m, and the dielectric half wavelength is 0.31m, considering the dielectric constant effect, the lowest frequency half wavelength is between 0.31m-0.5m, but the vertical wide size is still large at this time, therefore, in order to reduce the vertical direction wide size, part of the long array is folded and the end L type loading technology, part of the array is top T type loading technology, and a resistor with a certain resistance value is welded between the second top layer feeding line 1223 and the second top layer ground plate 1226, the resistance value is determined according to simulation, in this way, a resistor is connected in series between the upper layer radiation element and the lower layer radiation element, the resistor can absorb the end current, reduce the reflection of low frequency, reduce the resonance frequency of low frequency, and the resistor also absorbs low frequency energy, so the low frequency gain is low, but considering that the wide size seriously affects the system weight, therefore, a balance needs to be made between the radiation performance and the size, finally, the resistance in the application is set to 68 ohms, the vertical direction wide size of the antenna is greatly reduced, and is reduced by about 30%. The weight reduction treatment is performed through a plurality of slotted rectangular blocks 1227.

[0141] Figure 24 is the port return loss of the second probe antenna 122. Figure 25 is the gain curve of different frequencies of 300-2000MHz. Figure 26 is the radiation pattern of the second probe antenna 122 at 900MHz. Figure 27 is the radiation pattern of the second probe antenna 122 at 1.43GHz. From the above results, the second probe antenna 122 can cover the 300-2000MHz radio frequency range, and has a high gain, 2.9dB at 433MHz, 6dB at 900MHz, and a maximum gain of 7dB at 1.43GHz. The low frequency gain of the present application is negative because resistance is used near the longest array of the antenna. Microwave resistance has wave absorbing characteristics, and absorbs most of the energy at the lowest frequency. However, as can be seen from the port return loss, although the gain at the lowest frequency is negative, the unmanned aerial vehicle signal can still be received, and the unmanned aerial vehicle within 300MHz can still be detected in advance. The use of the rotation function and the compass of the system equipment can measure the direction of the unmanned aerial vehicle, and can improve the direction finding accuracy of the system.

[0142] As shown in Figure 28, the above-mentioned second probe antenna 122 is switched by a switch to realize unmanned aerial vehicle detection and direction finding and precise interference attack on unmanned aerial vehicles. The 300-2000MHz radio frequency line enters the radio frequency circuit or the interference attack circuit 6 after switching by the switch, and the frequency of the radio frequency circuit and the interference attack circuit 6 is 300-2000MHz circuit signal. The radio frequency circuit is a receiving detection circuit 5, which includes a radio receiving module and a digital signal processing module. The radio receiving module receives the unmanned aerial vehicle signal and processes the signal by limiting amplitude, switching filtering, multi-stage amplification, digital control attenuation, etc. The amplitude limiter uses a chip to prevent the back-end chip from being burned out due to receiving a signal that is too large. A digital control attenuator is used to prevent link saturation. The digital signal processing module processes the signal at the baseband and analyzes the specific model information and signal frequency of the unmanned aerial vehicle. The interference attack circuit 6 mainly completes power amplification and link matching of the signal, including a power amplification module and an attenuation module. Through the analyzed specific frequency information of the unmanned aerial vehicle, an interference signal of the specific frequency of the unmanned aerial vehicle is generated, and the signal is sent to the corresponding interference antenna through the signal amplification and attenuation function in the circuit.

[0143] As shown in Figure 29, the bottom layer antenna 3 includes a first interference antenna 131 and a second interference antenna 132. The first interference antenna 131 covers the frequency range of 4.8-6.2 GHz, and the antenna form adopts a microstrip Yagi antenna with a relative bandwidth of 25.5%. To achieve long-distance interference to the UAV, the first interference antenna 131 needs to have a higher gain, especially a gain greater than 15 dB at 5.2 / 5.8 GHz. Therefore, the first interference antenna 131 adopts a 2-way microstrip Yagi antenna in the elevation array design, including the upper two-way first radiation array element 1311, the first active array element 1312, the first power divider 1313, the first interference radio frequency connector 1315, and the bottom layer first ground plate 1314, and the two-way first radiation array element 1311. One end of the first power divider 1313 is connected with the first interference radio frequency connector 1315, and the output end is connected with the first active array element 1312. The middle pin of the first interference radio frequency connector 1315 is connected with the input end of the first power divider 1313, and the external pin is connected with the first ground plate 1314. The upper and lower two-way first radiation array elements 1311 are arranged according to the preset interval, and the preset interval is usually about half of the wavelength of the medium, for example, 31 mm. Each first radiation array element 1311 contains 22 directional array elements, which are arranged according to the preset interval of the Yagi antenna. The upper first radiation array element 1311 is one-to-one mapped and copied with the bottom first radiation array element 1311. The two layers of first radiation array elements 1311 can better radiate energy to the front end, especially the antenna gain at the low frequency end.

[0144] The first interference radio frequency connector 1315 of the first interference antenna 131 can be connected with the external radio frequency circuit through a radio frequency line. At this time, the radio frequency circuit is the interference attack circuit 6. The interference attack circuit 6 covers the frequency range of 4.8-6.2 GHz. The interference attack circuit 6 mainly completes the power amplification and link matching of the signal, including a power amplification module and an attenuation module. Through the specific frequency information of the UAV analyzed, the interference signal of the UAV determined frequency is generated, and the signal is sent to the corresponding interference antenna through the signal amplification and attenuation function in the circuit.

[0145] The second interference antenna 132 covers the frequency range of 2.3-2.6 GHz, and the antenna form adopts a microstrip Yagi antenna. To achieve high gain, the second interference antenna 132 adopts a 2-way antenna array design in the elevation direction, including two-way second radiation array elements 1321, a second active array element 1322, a second power divider 1323, a second interference radio frequency connector 1325, and a second ground plate 1324 at the bottom, and a third active array element 1326 at the bottom. One end of the second power divider 1323 is connected with the second interference radio frequency connector 1325, and the output end is connected with the second active array element 1322. The middle pin of the second interference radio frequency connector 1325 is connected with the input end of the second power divider 1323, and the external pin is connected with the second ground plate 1324. The second ground plate 1324 at the bottom is electrically connected with the third active array element 1326 at the bottom. The two-way second radiation array elements 1321 are arranged according to a preset interval, and the preset interval is usually about half of the wavelength of the medium. The directivity array elements are arranged according to the preset interval of the Yagi antenna.

[0146] It can be concluded from the simulation results in FIGS. 30-33 that the return loss of the antenna port is less than -10 dB in the frequency band of 4.5-6.3 GHz, which meets the requirement that the port VSWR is less than 2, and the relative bandwidth reaches 33.3%. At the same time, the gain in the entire band is more than 13 dB, and the gain at 5.2 GHz and 5.8 GHz reaches more than 15 dB. The entire antenna meets the requirements of high gain and wide bandwidth.

[0147] FIG. 34 is a port return loss diagram of the second interference antenna 132. FIG. 35 is a radiation pattern of the second interference antenna 132 at 2.45 GHz. It can be concluded from the above simulation results that the return loss of the antenna port is less than -10 dB in the frequency band of 2.3-2.6 GHz, which meets the requirement that the port VSWR is less than 2. At the same time, the gain at 2.45 GHz is more than 13 dB, which indicates that the entire antenna meets the requirements of high gain and high performance.

[0148] The second interference radio frequency connector 1325 of the second interference antenna 132 can be connected with an external radio frequency circuit through a radio frequency line. At this time, the radio frequency circuit is the interference attack circuit 6, the frequency coverage of the interference attack circuit 6 is 2.3-2.6 GHz, and the interference attack circuit 6 mainly completes power amplification and link matching of the signal, including a power amplification module and an attenuation module. Through the specific frequency information of the unmanned aerial vehicle analyzed, an interference signal of the unmanned aerial vehicle is generated, and the signal is sent to the corresponding interference antenna through the signal amplification and attenuation functions in the circuit.

[0149] As shown in FIG. 36, the embodiment of the present application also provides an unmanned aerial vehicle interference gun, which comprises the antenna system 1, the receiving detection circuit 5, the interference attack circuit 6, and the navigation deception circuit 7 as described above.

[0150] The radio signals of the intruding UAV are detected by the antenna system 1, the radio signals include a full frequency band range of 300-6000 MHz, the radio signals of the UAV are received by each detection antenna, the specific frequency characteristics of the UAV are identified by the radio receiving module and the digital signal module of the receiving detection circuit 5, the specific frequency information of the UAV is analyzed, and the frequency information is sent to the interference attack circuit 6.

[0151] The interference attack circuit 6 generates the interference signals of the specific frequency of the UAV according to the specific frequency information of the UAV, the signals are sent to the corresponding interference antennas through the amplification and attenuation functions in the interference attack circuit 6, the interference antennas radiate towards the UAV, and the precise attack on the UAV is realized. Meanwhile, the GPS information of the UAV is interfered by the navigation deception circuit 7, the UAV is forced to land or return, the position signals of the UAV are generated, the current false satellite signals are simulated, a false position information is sent, the deception function of the position of the UAV is realized, and the functions of driving away or landing the UAV are realized.

[0152] The omnidirectional detection antenna 11, the detection antenna assembly, the interference antenna assembly, and the navigation deception antenna 14 can realize the functions of direction finding, attack, and deception deception in the full frequency band of 300-6000 MHz, and the antenna system 1 has the advantages of compact structure, small size, and easy and flexible carrying in the anti-UAV control equipment.

[0153] As shown in FIG. 16, specifically, the receiving detection circuit 5 includes a radio receiving module and a digital signal processing module. The radio receiving module receives the full-band radio UAV signals, and performs the processing of limiting amplitude, switching filtering, multi-stage amplification, and digital control attenuation on the signals. The limiting amplifier uses a chip to prevent the back-end chip from being burned out due to the excessively large received signal. The digital control attenuator is used to prevent the link saturation. The digital signal processing module performs the baseband processing on the signals, and analyzes the specific model information and the signal frequency of the UAV.

[0154] As shown in FIG. 17, specifically, the interference attack circuit 6 includes a signal power amplification module and an attenuation function. The interference signals of the specific frequency of the UAV are generated according to the specific frequency information of the UAV, the signals are sent to the corresponding interference antennas through the signal amplification and attenuation functions in the circuit, the interference antennas radiate towards the UAV, and the precise attack on the UAV is realized.

[0155] Specifically, the navigation deception circuit 7 generates the position signals of the UAV, simulates the current false satellite signals, sends a false position information, realizes the deception function of the position of the UAV, and realizes the functions of driving away or landing the UAV according to the analyzed signal information of the UAV.

[0156] Specifically, the receiving detection circuit 5 is divided into a low-frequency detection circuit and a high-frequency detection circuit. The low-frequency detection circuit covers the frequency range of 300-2000MHz, the second probe antenna 122 and the omnidirectional detection antenna 11 are switched into the low-frequency detection circuit through the switch, realizing the analysis of the time-frequency characteristics of 300-2000MHz radio signals; the omnidirectional detection antenna 11 is used for receiving 1-2GHz unmanned aerial vehicle signals in all directions to complete the detection and early warning function; the second probe antenna 122 realizes the analysis of the time-frequency characteristics of 300-2000MHz radio signals, completing the direction finding function of 300-2000MHz; the high-frequency detection circuit covers the frequency range of 1.5-6GHz, the omnidirectional detection antenna 11 and the first probe antenna 121 are switched into the high-frequency detection circuit through the switch; at this time, the omnidirectional detection antenna 11 receives 1.5-6GHz unmanned aerial vehicle signals in all directions to complete the detection and early warning function; the first probe antenna 121 realizes the analysis of the time-frequency characteristics of 1.5-6GHz radio signals, completing the direction finding function of 2-6GHz.

[0157] Specifically, the interference striking circuit 6 includes a first interference striking circuit, a second interference striking circuit, a third interference striking circuit, a fourth interference striking circuit and a fifth interference striking circuit; the first interference striking circuit covers the frequency range of 4.8-6.2GHz, can be connected with the first interference antenna 131, completing the suppression interference of 4.8-6.2GHz unmanned aerial vehicle signals; the second interference striking circuit covers the frequency range of 2.3-2.6GHz, can be connected with the second interference antenna 132, completing the suppression interference of 2.4GHz unmanned aerial vehicle signals; the third interference striking circuit covers the frequency range of 1.5-6GHz, can be sequentially connected with the third interference antenna 133, completing the suppression interference of 1.5-6GHz unmanned aerial vehicle signals; the fourth interference striking circuit covers the frequency range of 300-2000MHz, can be sequentially connected with the fourth interference antenna 134, completing the suppression interference of 300-2000MHz unmanned aerial vehicle signals; the fifth interference striking circuit is sequentially connected with the navigation decoy antenna 14, realizing the suppression interference of 1.1-1.7GHz GPS signals; at the same time, the second interference striking circuit and the third interference striking circuit contain the common frequency band of 2.3-2.6GHz, so the second interference striking circuit and the third interference striking circuit can be emitted at the same time, improving the power of the interference signal, realizing the suppression interference of 2.3-2.6GHz unmanned aerial vehicles with farther distance and higher suppression ratio. Similarly, the third interference striking circuit and the first interference striking circuit contain the common frequency band of 5-6GHz, under the condition of requiring farther distance and higher suppression ratio, the third interference striking circuit and the first interference striking circuit can be emitted at the same time, improving the power of the interference signal, realizing the suppression interference of 5-6GHz unmanned aerial vehicles with farther distance and higher suppression ratio.

[0158] Specifically, the navigation deception circuit 7 and the navigation deception antenna 14 are connected to generate a position signal damaging the unmanned aerial vehicle, simulate a current false satellite signal, and send a false position information to realize the deception function of the unmanned aerial vehicle position.

[0159] The interference gun can cover the full frequency band detection, full frequency band attack and navigation deception of 300-6000MHz at the same time, has long detection distance, good direction finding effect, strong interference effect, compact structure, small volume and easy portability.

[0160] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0161] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0162] In the present application, unless otherwise explicitly specified and limited, the terms "assembly", "connection", "connection", "fixation" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0163] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments only, and any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and refinements without departing from the principle of the present application should be regarded as the protection scope of the present application.

Claims

1. An antenna system for a drone jammer gun, characterized by, The antenna system (1) is arranged in layers, specifically top layer (2), middle layer (3) and bottom layer (4) arranged in sequence from top to bottom; the specific structure of the antenna system (1) includes omnidirectional detection antenna (11), detection antenna assembly, interference antenna assembly and navigation deception antenna (14); The detection antenna assembly includes first detection antenna (121) and second detection antenna (122); The interference antenna assembly includes first interference antenna (131), second interference antenna (132), third interference antenna (133) and fourth interference antenna (134); The first detection antenna (121), navigation deception antenna (14) and third interference antenna (133) are arranged in sequence from top to bottom and arranged in the top layer (2); The second detection antenna (122) and the fourth interference antenna (134) share an antenna and are arranged in the middle layer (3); The first interference antenna (131) and the second interference antenna (132) are arranged in the same plane from top to bottom and arranged in the bottom layer (4); The omnidirectional detection antenna (11) is arranged in the front area of the top layer (2) and the middle layer (3); The first detection antenna (121) is a super wideband miniaturized logarithmic periodic antenna covering the frequency range of 1.5-6GHz; the second detection antenna (122) is a super wideband miniaturized logarithmic periodic antenna covering the frequency range of 300-2000MHz; the omnidirectional detection antenna (11), the first detection antenna (121) and the second detection antenna (122) cooperate to realize detection of drones in the full frequency range of 300-6000MHz. The first interference antenna (131) is a microstrip Yagi antenna, which is a wideband antenna covering the frequency range of 4.8-6.2GHz; the first interference antenna (131) adopts a form of dual-antenna array in the pitch direction; 2. The drone jammer gun antenna system of claim 1, wherein, The second interference antenna (132) is a microstrip Yagi antenna, which is a narrowband antenna covering the frequency range of 2.3-2.6GHz; the second interference antenna (132) adopts a form of dual-antenna array in the pitch direction; The third interference antenna (133) is a super wideband antenna in the form of a super wideband miniaturized logarithmic periodic antenna covering the frequency range of 1.5-6GHz; the fourth interference antenna (134) is a super wideband antenna in the form of a super wideband miniaturized logarithmic periodic antenna covering the frequency range of 300-2000MHz; The first interference antenna (131), the second interference antenna (132), the third interference antenna (133) and the fourth interference antenna (134) cooperate to realize interference of drones in the full frequency range of 300-6000MHz. The navigation deception antenna (14) is a wideband antenna in the form of a wideband miniaturized logarithmic periodic antenna covering the frequency range of 1.1-1.7GHz.

3. The drone jammer gun antenna system of claim 1, wherein, The omnidirectional detection antenna (11) is a super wideband omnidirectional elliptical microstrip antenna, the top layer includes a radiation patch (111), a tapered microstrip feed line (112), a detection through hole (113) and four detection metal vias (114); the bottom layer includes a detection ground plate (115) and a detection RF connector (116); 4. The drone jammer's antenna system according to any of claims 1-3, characterized in that, ​ The inner core of the detection radio frequency connector (116) is inserted into the detection via hole (113) of the top layer structure and welded on the top layer tapered microstrip feed line (112); the outer core of the detection radio frequency connector (116) is connected with the detection ground plate (115), and the four pins of the outer core are inserted into the four detection metal vias (114) above the top layer and welded with the detection metal vias (114); the detection radio frequency connector (116) is a back insertion type feed.

5. The drone jammer's antenna system according to any of claims 1-3, characterized in that, The first probe antenna (121) is a double panel, the top layer includes a plurality of first radiation array elements (1212), a first top layer feed line (1213), a first feed point (1211), a first radio frequency connector (1214), and a first top layer ground plate (1215); The bottom layer includes a first bottom layer feed line (1216), a first metal via (1217), a first bottom layer ground plate (1218), a first via hole (1219), a first microstrip line (1220), and a bottom layer metal via (1221); The first radio frequency connector (1214) is a top insertion type feed, the inner core of the first radio frequency connector (1214) is inserted into the first via hole (1219) of the bottom layer structure and welded with the first microstrip line (1220); the outer core of the first radio frequency connector (1214) is connected with the first top layer ground plate (1215), and the four pins of the outer core are inserted into the four bottom layer metal vias (1221) of the bottom layer and welded with the bottom layer metal vias (1221), and the first top layer ground plate (1215) is conductively connected with the first bottom layer ground plate (1218) through the first metal via (1217).

6. The drone jammer gun antenna system of claim 1, wherein, The second probe antenna (122) is a double panel, the top layer includes a second feed point (12201), a plurality of second radiation array elements (1222), a second top layer feed line (1223), a second metal via (1224), a surface-mounted resistor (1225), a second top layer ground plate (1226), and a slotted rectangular block (1227); The second top layer ground plate (1226) is conductively connected with the bottom layer radiation array element through the second metal via (1224); the inner core of the radio frequency coaxial line is inserted from the second feed point (12201) and welded on the second top layer feed line (1223), and the outer core of the radio frequency coaxial line is welded on the second bottom layer feed line.

7. The drone jammer's antenna system according to any of claims 1-3, characterized by, The navigation deception antenna (14) is a double panel; the top layer includes a plurality of radiation array elements (142), a third top layer feed line (143), a third feed point (141), a third radio frequency connector (144), and a third top layer ground plate (145); The bottom layer includes a third bottom layer feed line (146), a third metal via (147), a second bottom layer ground plate (148), a second via hole (149), a second microstrip line (150), and a fourth metal via (151); The first radio frequency connector (1214) is a top insertion type feed, the inner core of the first radio frequency connector (1214) is inserted into the first via hole (1219) of the bottom layer structure and welded with the first microstrip line (1220); the outer core of the first radio frequency connector (1214) is connected with the first top layer ground plate (1215), and the four pins of the outer core are inserted into the four bottom layer metal vias (1221) of the bottom layer and welded with the bottom layer metal vias (1221), and the first top layer ground plate (1215) is conductively connected with the first bottom layer ground plate (1218) through the first metal via (1217). The third radio frequency connector (144) is inserted from the top layer plug-in feed, the inner core of the third radio frequency connector (144) is inserted into the second through hole (149) of the bottom layer structure, and is welded with the second microstrip line (150), the outer core of the third radio frequency connector (144) is connected with the third top layer ground plate (145), four pins of the outer core are inserted into four fourth metal vias (151) of the bottom layer, and are welded with the fourth metal vias (151), and the third top layer ground plate (145) is conductively connected with the second bottom layer ground plate (148) through the third metal via (147); One end of the long radio frequency wire is welded with the second microstrip line (150), and the other end is fed from the front end third feed point (141) and welded with the third top layer feed line (143); one end of the outer core of the long radio frequency wire is welded with the second bottom layer ground plate (148), and the other end is welded with the front end feed line of the third bottom layer feed line (146).

8. A drone jammer, characterized by, The antenna system of the unmanned aerial vehicle jamming gun includes a receiving detection circuit (5), an interference striking circuit (6), a navigation deception circuit (7), and the unmanned aerial vehicle jamming gun according to any one of claims 1-7, the receiving detection circuit (5) is connected with the first detection antenna (121), the second detection antenna (122) and the omnidirectional detection antenna (11) in the antenna system (1) respectively; the interference striking circuit (6) is connected with the navigation deception antenna (14), the third interference antenna (133), the fourth interference antenna (134), the first interference antenna (131) and the second interference antenna (132) in the antenna system (1) respectively; and the navigation deception circuit (7) is connected with the navigation deception antenna (14).

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