Mobile Defense System

Abstract

A method and system are provided for limiting, deterring, or impeding the movement of a mobile object that poses a threat, thereby eliminating the threat. [Solution] The defense system comprises one or more transmitters that output specific radio waves and multiple antennas 3 that can radiate the radio waves output from the transmitters in a specific direction, and is configured to cause the radio waves radiated from the multiple antennas 3 to interfere with each other to intensify them at a specific point, thereby forming radio jamming waves at a specific point P, and scans the radio waves radiated from the multiple antennas 3, causing the radio jamming waves to scan within a specific two-dimensional or three-dimensional area, thereby forming a radio jamming area S.

Description

[Technical Field]

[0001] The present invention relates to a defense system that jams radio waves by outputting specific radio waves to a mobile object. [Background technology]

[0002] Mobile objects such as flying objects, land vehicles, and ships detect their location by receiving radio waves from the Global Navigation Satellite System (GNSS) and also communicate control signals via radio waves. In this way, radio waves are necessary for the operation of mobile objects. Mobile entities can be classified into bona fide mobile entities and malicious mobile entities. Bona fide mobile entities operate in accordance with laws and regulations, while malicious mobile entities are used for criminal acts such as terrorism. In order to prevent malicious mobile entities from committing criminal acts, it is necessary to restrict, deter, or disrupt their operations.

[0003] Currently, there is a type of jamming device known as a jamming gun that can restrict, deter, or disrupt the operation of such malicious mobile objects. This jamming gun has a directional antenna attached to the barrel that emits jamming radio waves in the direction the barrel is pointing. This jamming gun generally deters and disrupts the operation of a target mobile object by emitting jamming radio waves that interfere with the mobile object's acquisition of location information from GNSS and communications related to its operation.

[0004] Problems with jamming guns include the fact that they only emit jamming signals in a specific direction, are high-powered, are effective within line of sight, and require long-term emission. High-power jamming signals emitted for a long period of time can also jam unrelated communications, limiting the promotion of public welfare. Furthermore, because jamming is only effective in a specific direction, there is a risk that they will not be able to respond if multiple malicious mobile targets are present.

[0005] Furthermore, since detection is primarily visual, it is difficult to find them at night, and even if a radar system is constructed to detect moving objects, the radar may be rendered ineffective if the moving object is made of a radio wave absorbing material. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-28605 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was developed with the aim of resolving the above-mentioned drawbacks, and one object of the present invention is to contribute to security and crisis management by providing a defense system that can limit, deter, and obstruct the movements of threatening mobile objects, thereby eliminating the threat. Furthermore, the present invention aims to provide a mobile object authentication system that can limit, restrain, and obstruct the operation of a mobile object that poses a threat, while providing relief to bona fide mobile objects that do not pose a threat without obstructing their operation. A further object of the present invention is to provide a radar system that can detect the location of a moving object that poses a threat while restricting, inhibiting, or disrupting its operation. A further object of the present invention is to provide a positioning system that can determine the position of a non-threatening mobile object while restricting, inhibiting, or obstructing the operation of a mobile object that poses a threat. [Means for solving the problem]

[0008] A defense system according to one embodiment of the present invention comprises one or more transmitters that output specific radio waves and a plurality of antennas that can radiate the radio waves output from the transmitters in a specific direction, and is configured to cause the radio waves radiated from the plurality of antennas to interfere with each other so as to intensify them at a specific point, thereby forming a radio jamming wave at the specific point, and to scan the radio waves radiated from the plurality of antennas and cause the radio jamming wave to scan within a specific two-dimensional or three-dimensional area, thereby forming a radio jamming area.

[0009] In another aspect of the present invention, a defense system includes multiple antennas each having a plurality of antenna elements and a control mechanism for controlling the phase of radio waves fed to the plurality of antenna elements, and the control mechanism controls the directivity of the antenna.

[0010] A mobile object authentication system according to one aspect of the present invention comprises the defense system described above, an authenticated mobile object, and an authentication transmitter that outputs radio waves containing information related to the operation of the authenticated mobile object, and the authenticated mobile object comprises a detection unit that detects information related to the operation of the authenticated mobile object from the radio waves output from the authentication transmitter.

[0011] In another aspect of the mobile authentication system of the present invention, information for detecting radio waves output from an authentication transmitter or information related to operations contained in the radio waves is encrypted, and the detection unit of the authenticated mobile body has means for decrypting the encrypted radio waves or the encrypted information contained in the radio waves.

[0012] In a mobile authentication system according to another aspect of the present invention, a transmitter of a defense system is also used as an authentication transmitter.

[0013] A radar system according to one aspect of the present invention comprises the defense system described above, a receiver that receives radio waves emitted from multiple antennas and reflected by a moving object, and a moving object detection unit that detects information regarding the movement of the moving object based on the radio waves received by the receiver.

[0014] A radar system according to another aspect of the present invention radiates different radio waves from a plurality of antennas.

[0015] A radar system according to another aspect of the present invention includes the defense system described above, a receiver that detects that radio waves emitted from multiple antennas are obstructed by a moving object, and a moving object detection unit that detects information regarding the movement of the moving object based on the information detected by the receiver.

[0016] A positioning system according to one aspect of the present invention comprises the radar system described above and an authenticated mobile object, and has a mechanism for transmitting information regarding the movement of the mobile object detected by the radar system to the authenticated mobile object. [Effects of the Invention]

[0017] The defense system of the present invention can eliminate threats by restricting, deterring, or jamming the movements of threatening mobile objects. This is because the defense system radiates radio waves output from a transmitter from multiple antennas capable of radiating in a specific direction, and causes the radio waves radiated from the multiple antennas to interfere with each other and intensify at a specific point, thereby forming a jamming wave at the specific point, and also scans the radio waves radiated from the multiple antennas, causing the jamming wave to scan within a specific two-dimensional or three-dimensional area, thereby forming a jamming area. By forming a jamming area within a two-dimensional or three-dimensional area, the defense system can eliminate threats by restricting, deterring, or jamming the movements of mobile objects that enter the jamming area.

[0018] Furthermore, the defense system of the present invention uses multiple antennas that can emit radio jamming waves in specific directions at levels that would normally not affect anything else, in order to intensify and interfere at specific points. This reduces the adverse effects on the surrounding area caused by the radio waves emitted from the multiple antennas, while creating strong radio jamming waves in the radio jamming area, effectively restricting, deterring, and disrupting the movement of threatening moving objects.

[0019] In addition, the defense system of claim 2 has multiple antennas that are each equipped with multiple antenna elements and a control mechanism that controls the phase of the radio waves fed to them, making it possible to control the directivity of each of the multiple antennas, thereby enabling more accurate and precise jamming of radio waves at specific locations.

[0020] The mobile object authentication system of claim 3 of the present invention has the feature of being able to restrict, inhibit, or interfere with the operation of threatening mobile objects, while relieving bona fide mobile objects without interfering with their operation. This is because this mobile object authentication system comprises the above-mentioned defense system, an authenticated mobile object, and an authentication transmitter that outputs radio waves containing information related to the operation of the authenticated mobile object, and the authenticated mobile object is equipped with a detection unit that detects the information related to the operation of the authenticated mobile object from the radio waves output from the authentication transmitter. In this mobile object authentication system, the detection unit provided in the authenticated mobile object detects the information related to the operation of the authenticated mobile object from the radio waves output from the authentication transmitter, making it possible to allow the authenticated mobile object to operate normally even within a radio wave jamming area.

[0021] The mobile body authentication system of claim 4 of the present invention encrypts and conceals information for detecting radio waves or operation-related information output from the authentication transmitter, and decrypts the radio waves or information embedded in the detection unit of the authenticated mobile body, thereby effectively disrupting threatening mobile bodies while maintaining the operation of the authenticated mobile body.

[0022] Claim 5 of the present invention or 6 This radar system uses a defense system and a receiver that receives radio waves output from a transmitter and reflected by a moving object, thereby detecting information about the movement of the moving object based on the radio waves received by the receiver.

[0023] Claims of the invention 7 The radar system emits different radio waves from multiple antennas, making it possible to detect information relating to the movement of a moving object with higher accuracy.

[0024] Claims of the invention 8 This radar system uses a receiver that detects when radio waves emitted from multiple antennas are obstructed by a moving object, and a moving object detection unit that detects information about the movement of the moving object based on the information detected by the receiver.By detecting radio waves obstructed by a moving object that obstructs the propagation of radio waves, such as a radio wave absorber, this system can detect information about the movement of even stealth-equipped moving objects.

[0025] Claims of the invention 9 The positioning system has a mechanism for transmitting information about the movement of the mobile object detected by the radar system to the authenticated mobile object, thereby making it possible to determine the position of the authenticated mobile object. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a conceptual diagram of a defense system according to one embodiment of the present invention. [Figure 2] 1 is a schematic configuration diagram of a defense system according to one embodiment of the present invention. [Figure 3] FIG. 10 is a schematic diagram illustrating the configuration of a defense system according to another embodiment of the present invention. [Figure 4] FIG. 10 is a schematic diagram illustrating the configuration of a defense system according to another embodiment of the present invention. [Figure 5] 1 is a schematic plan view showing a state in which a defense system according to one embodiment of the present invention scans radio waves to form a radio wave jamming area. [Figure 6] 1 is a schematic front view showing a state in which a defense system according to one embodiment of the present invention scans radio waves to form a radio wave jamming area. [Figure 7] FIG. 10 is a schematic perspective view showing an example of a radio wave jamming area formed by a protection system according to another embodiment of the present invention. [Figure 8] FIG. 10 is a schematic perspective view showing an example of a radio wave jamming area formed by a protection system according to another embodiment of the present invention. [Figure 9] FIG. 10 is a schematic diagram illustrating the configuration of a defense system according to another embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram illustrating the configuration of a defense system according to another embodiment of the present invention. [Figure 11] FIG. 1 is a schematic perspective view showing a phased array antenna. [Figure 12] 10 is a schematic plan view showing a state in which a defense system according to another embodiment of the present invention scans radio waves to form a radio wave jamming area. FIG. [Figure 13] 1 is a schematic configuration diagram of a mobile authentication system according to an embodiment of the present invention; [Figure 14] FIG. 10 is a conceptual diagram of a mobile authentication system according to another embodiment of the present invention. [Figure 15] FIG. 10 is a conceptual diagram of a mobile authentication system according to another embodiment of the present invention. [Figure 16] 1 is a schematic configuration diagram of a radar system according to an embodiment of the present invention; [Figure 17] 1 is a schematic configuration diagram of a radar system according to an embodiment of the present invention. [Figure 18] 1 is a schematic configuration diagram of a radar system according to an embodiment of the present invention. [Figure 19] 1 is a schematic configuration diagram of a radar system according to an embodiment of the present invention. [Figure 20] 1 is a schematic configuration diagram of a positioning system according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments shown below are merely examples for embodying the technical concept of the present invention, and the present invention is not limited to the contents of the following embodiments.

[0028] The defense system of the present invention eliminates threats by restricting, deterring, or jamming the movements of threatening mobile objects. The defense system includes one or more transmitters that output specific radio waves and multiple antennas that can radiate the radio waves output from the transmitters in specific directions. The defense system creates jamming waves at specific locations by causing the radio waves radiated from the multiple antennas to interfere with each other and intensify them at the specific location. Furthermore, the defense system scans the radio waves radiated from the multiple antennas to scan the jamming waves within a specific two-dimensional or three-dimensional area, thereby forming a jamming zone. The defense system eliminates threats by restricting, deterring, or jamming the movements of mobile objects that enter the jamming zone.

[0029] As used herein, a mobile object refers to a flying object such as an aircraft, drone, radio-controlled airplane, or rocket; a land-based object such as an automobile, autonomous vehicle, truck, radio-controlled car, or mobile device; or a maritime object such as a ship, autonomous cargo ship, or radio-controlled boat. Some of these mobile objects use a positioning system that uses radio waves, such as GNSS, to determine their location. The operation of such mobile objects can be restricted or inhibited by jamming the reception of radio waves from GNSS. Some mobile objects also use radio waves to transmit information detected by sensors, image information, communications related to the movement of the mobile object via radio control, and other communications related to the operation of the mobile object. The operation of such mobile objects can be restricted, inhibited, or disrupted by jamming the reception of radio waves related to their operation. In other words, jamming the radio waves used to determine their location or to perform their operation can effectively neutralize the mobile object and eliminate the threat.

[0030] Here, mobile objects include mobile objects that pose a threat and mobile objects that do not pose a threat. In the present invention, as will be described in detail later, it is possible to interfere with the operation of a mobile object that poses a threat, while allowing a mobile object that does not pose a threat to operate normally without interfering with its operation. Therefore, in this specification, a mobile object that does not pose a threat can be distinguished as an authenticated mobile object, separate from a mobile object that poses a threat or a mobile object that may be a threat, which is a target of interference.

[0031] [Embodiment 1] (Defense System 10) An example of a defense system according to a first embodiment of the present invention is shown in FIGS. 1 to 3. In this first embodiment, a mobile object 1 is an aerial vehicle such as a drone, and a defense system 10 is shown that defends an area to be protected from the mobile object 1. The defense system 10 shown in these figures includes a transmitter 2 that outputs specific radio waves and multiple antennas 3 that can radiate the radio waves output from the transmitter 2 in a specific direction. The defense system 10 forms a jamming wave at a specific point P by causing interference between the radio waves radiated from the multiple antennas 3 so as to intensify the interference at the specific point P. Furthermore, the defense system 10 scans the radio waves radiated by the multiple antennas 3 within a specific two-dimensional or three-dimensional area, thereby forming a jamming area S. The defense system 10 uses the jamming waves to restrict, inhibit, or obstruct the movement of the mobile object 1 that has entered the jamming area S, thereby eliminating the threat.

[0032] (Transmitter 2) The transmitter 2 is composed of one or more transmitters and outputs specific radio waves to multiple antennas 3. A defense system 10 equipped with a single transmitter 2 can radiate radio waves of the same phase from multiple antennas 3 arranged on the output side of the transmitter 2, as shown in FIG. 2. By installing a phase shifter 5 between the transmitter 2 and the multiple antennas 3, this defense system 10 can radiate radio waves from the antennas 3 with a phase that conforms to the phase shifter 5. It is also possible to radiate radio waves from the antennas 3 with a phase that conforms to the length of the radio wave transmission path, such as a coaxial cable, arranged between the transmitter 2 and the antennas 3. The defense system 10 shown in FIG. 2 includes a control unit 6 that controls the phase shifters 5 and the transmitters 2, arranged between the transmitter 2 and each antenna 3. The phase shifters 5 and the control unit 6 together constitute a control mechanism 4 that controls the phase of the specific radio waves radiated from the multiple antennas 3. By using the control mechanism 4 to control the phase of the radio waves output from a single transmitter 2 and radiated from the multiple antennas 3, this defense system 10 can cause the radio waves radiated from the multiple antennas 3 to constructively interfere with each other at a specific point P.

[0033] As shown in FIG. 3, a defense system 10 equipped with multiple transmitters 2 has one or more antennas 3 associated with the multiple transmitters 2. This defense system 10 can control the output timing and output intensity of radio waves emitted from the multiple antennas 3 by synchronizing the multiple transmitters 2, and can also change the phase. The defense system 10 shown in FIG. 3 is equipped with a control mechanism 4 that controls each transmitter 2. By adjusting the phase of the radio waves output from each transmitter 2 with this control mechanism 4, it is possible to cause the radio waves emitted from the multiple antennas 3 to constructively interfere with each other at a specific point P. Although not shown, a defense system equipped with multiple transmitters can also adjust the phase of the radio waves emitted from each antenna by placing a phase shifter between each transmitter and antenna and providing a control mechanism that controls this phase shifter with a control unit.

[0034] In addition, in a defense system 10 in which radio waves output from a transmitter 2 are radiated from multiple antennas 3, it is possible to change the phase of the radio waves radiated from each antenna 3, thereby giving the radio waves radiated from the multiple antennas 3 directionality due to the phase change, thereby essentially changing the radiation direction of the radio waves.

[0035] (Multiple Antennas 3) The defense system 10 is equipped with multiple antennas 3 for emitting specific radio waves output from the transmitter 2. The multiple antennas 3 can be directional or omnidirectional. Directional antennas include Yagi-Uda antennas, patch antennas, and parabolic antennas, while omnidirectional antennas include half-wave dipole antennas. Here, the radiation direction of a Yagi-Uda antenna can be changed by mechanical control. For parabolic antennas, the directionality can also be controlled by using a multi-beam antenna.

[0036] The antennas 3 are not limited to emitting radio waves with single polarization such as horizontal polarization or vertical polarization, but may also emit dual polarization, circular polarization, elliptical polarization, etc. Therefore, helical antennas, cross Yagi-Uda antennas, dual polarization antennas, etc. may also be used.

[0037] The protection system 10 generates jamming waves by constructively interfering specific radio waves radiated from multiple antennas 3 at a specific location. By constructively interfering the radio waves radiated from multiple antennas 3 in this manner, it is possible to increase the amplitude of the jamming waves strengthened by the interference while reducing the output power of the individual radio waves radiated from each antenna 3. In other words, by adjusting the phase of the radio waves radiated from multiple antennas 3, it is possible to increase the amplitude of the composite wave at a specific location P and generate jamming waves that restrict, inhibit, and disrupt the operation of the mobile object 1. Therefore, this protection system 10 can reduce the output power of the radio waves radiated from each antenna 3 to reduce adverse effects on the surrounding area, while strengthening the jamming waves generated at the specific location P to effectively restrict, inhibit, and disrupt the operation of the mobile object 1.

[0038] When multiple antennas 3 have directionality, as shown in Figures 1 to 3, the directivity of the radio waves from each antenna 3 can be adjusted so that the radio waves emitted from the multiple antennas 3 intersect at a specific point P, and a strong radio jamming wave can be formed by causing the radio waves to interfere with each other so that they strengthen each other at this specific point P.

[0039] Furthermore, when multiple antennas are omnidirectional, as shown in Figure 4, the circular radio waves emitted from each antenna 3 can be made to intersect at a specific point P, and the radio waves can be made to interfere with each other so that they strengthen each other at this intersection, thereby forming a strong radio jamming wave.

[0040] (Specific point P) The specific point P refers to a point where radio waves emitted from multiple antennas 3 can arrive, and is a point where interference occurs so that the amplitude of the radio waves output from the multiple antennas 3 increases at the specific point P. At the specific point P, the radio waves that interfere constructively with each other are combined to increase the amplitude according to the principle of superposition, forming a strong radio jamming wave.

[0041] (Radio wave scanning) Furthermore, the protection system 10 of the present invention is characterized in that it scans radio waves emitted from multiple antennas 3 to scan a specific point P where radio jamming waves are generated within a specific two-dimensional or three-dimensional area, thereby forming a radio jamming area S. This protection system 10 does not simply create pinpoint radio jamming waves by interfering with multiple radio waves, but rather, as shown in Figures 5 and 6, scans the point where radio jamming waves are generated, thereby creating a two-dimensional or three-dimensional radio jamming area S to restrict, inhibit, or disrupt the movement of a mobile object 1. Here, Figure 5 shows the state in which the point where radio jamming waves are generated is scanned in the horizontal plane as X1, X2, etc., thereby forming a radio jamming area S that extends horizontally within a specified area. Also, Figure 6 shows the state in which the point where radio jamming waves are generated is scanned in the vertical plane as Z1, Z2, etc., thereby forming a radio jamming area S that extends vertically within a specified area.

[0042] That is, the defense system 10 of the present invention forms a radio wave jamming area S in a specific two-dimensional or three-dimensional area, and applies radio wave jamming waves to a moving object 1 that moves into this area, thereby restricting, deterring, or obstructing its movement. Radio wave scanning is possible by controlling the directivity of the antenna 3, controlling the phase shifter 5, synchronizing the transmitter 2, etc., and is capable of scanning within a two-dimensional or three-dimensional area. In particular, scanning through electrical control such as controlling the phase shifter 5 makes it possible to scan a wide area in a short period of time.

[0043] The shape and extent of the jamming zone S formed by the above-described protection system 10 can be arbitrarily set. For example, the jamming zone S can be formed in a three-dimensional shape extending in the sky above the area to be protected, as shown in FIGS. 1, 5, and 6. Furthermore, the jamming zone S can also be formed in a dome shape surrounding the upper end of the building to be protected, as shown in the schematic diagram of FIG. 7. This type of jamming zone S can be efficiently formed, for example, by multiple antennas 3 installed on the rooftop of the building. Furthermore, the jamming zone S can also be formed in a two-dimensional shape, as shown in FIG. 8. FIG. 8 illustrates the formation of a jamming zone S that spreads like a screen in the vertical direction between adjacent buildings. This type of jamming zone S can be efficiently formed, for example, by multiple antennas 3 installed vertically on the opposing walls of the buildings. Regardless of the shape of the jamming zone S, the desired shape can be formed by scanning radio waves emitted from the multiple antennas 3 within a specific two-dimensional or three-dimensional area.

[0044] (specific radio waves) The above-described defense system 10 uses jamming waves formed by specific radio waves to disrupt radio waves related to the operation of the mobile body 1. These specific radio waves are radio waves that can limit, inhibit, or disrupt the operation of the mobile body 1, such as jamming waves, spoofing waves, and meaconing waves.

[0045] Jamming waves cause a deterioration in the signal-to-noise ratio (SNR), and can cause radio wave interference and degradation of communication quality, etc. Examples of jamming waves include random noise, white noise, sine waves, carrier waves, narrowband modulated waves, pulse waves, frequency hopping waves, phase modulated waves, and burst jamming waves, which can limit, inhibit, or disrupt the operation of the mobile object 1.

[0046] Spoofing waves imitate radio waves containing legitimate information and can deceive receivers that receive these radio waves by transmitting radio waves containing false information, thereby restricting, inhibiting, or disrupting the operation of the mobile unit 1. For example, when GNSS spoofing is performed, radio waves containing false signals are emitted to a GNSS receiver, which can cause errors in location information and time information, leading the mobile unit 1 to a false location.

[0047] Meaconing waves are used to eavesdrop on radio waves containing legitimate signals and retransmit them, thereby transmitting false information to the receiver, i.e., radio waves containing information that causes the receiver to mistake past information for current information, thereby deceiving the receiver and restricting, inhibiting, or disrupting the operation of the mobile unit 1. For example, by retransmitting past GNSS signals, it is possible to reduce the positioning accuracy or cause the position to be misidentified, leading the mobile unit 1 to a false location.

[0048] [Embodiment 2] The defense system 10 of the present invention can use, as the multiple antennas 3, antennas that are equipped with multiple antenna elements 9 and a control mechanism 4 that controls the phase of the radio waves fed to the multiple antenna elements 9, and whose directivity can be controlled by the control mechanism 4. Below, a defense system 10 according to a second embodiment of the present invention, which is equipped with multiple antennas 3 whose directivity can be adjusted by phase control, will be described in detail.

[0049] 9 and 10 includes one or more transmitters 2 that output specific radio waves, and multiple antennas 3 that can radiate the radio waves output from the transmitter 2 in specific directions. The multiple antennas 3 include multiple antenna elements 9 and a control mechanism 4 that controls the phase of the radio waves fed to the multiple antenna elements 9. This antenna 3 can control the directionality of the radio waves radiated from the multiple antenna elements 9 by using the control mechanism 4 to control the phase of the radio waves fed to the multiple antenna elements 9.

[0050] (Multiple Antennas 3) The antenna 3 shown in Figures 9 to 11 is a phased array antenna 3X composed of multiple antenna elements 9. This defense system 10 is capable of controlling the antenna directionality using the phased array antenna 3X. However, the defense system can also use multiple omnidirectional antennas as antennas whose directivity can be controlled by phase control, and impart directionality by adjusting the phase of the radio waves supplied to these antennas. Furthermore, the defense system 10 may use the phased array antenna 3X in combination with other different antennas.

[0051] (multiple antenna elements 9) The multiple antenna elements 9 can generate directivity by changing the phase of the radio waves fed to each of them using a phase shifter 5 or the like, and can radiate radio waves in a specific direction. The shape of the antenna elements 9 is not particularly specified, and various antenna elements 9 such as dipole antennas and patch antennas can be used. Furthermore, if the antenna element is compatible with dual polarization, it can also radiate horizontally polarized, vertically polarized, elliptically polarized, or circularly polarized radio waves.

[0052] (Control Mechanism 4) The control mechanism 4 is connected between the transmitter 2 and each antenna element 9 and includes a plurality of phase shifters 5 that adjust the phase of the radio waves supplied from the transmitter 2, and a control unit 6 that controls each phase shifter 5 to adjust the phase of the radio waves radiated from each phase shifter 5. By controlling the phase shifters 5, the control mechanism 4 adjusts the phase of the radio waves supplied from the transmitter 2 to each antenna element 9, thereby adjusting the directivity of the radio waves radiated from each antenna 3. Furthermore, the control mechanism 4 can adjust the phase of the radio waves radiated from each antenna 3 so that specific radio waves radiated in specific directions from the multiple antennas 3 interfere constructively with each other at a specific point P to form a radio jamming wave.

[0053] The defense system 10 shown in FIG. 9 includes a single transmitter 2, and the radio waves output from this transmitter 2 are fed to each antenna element 9 via a phase shifter 5 and an attenuator 8. The control mechanism 4 shown in this figure is composed of a main control unit 7 that controls multiple antennas 3 and a control unit 6 that controls each antenna 3. Each antenna 3 adjusts the output of the radio waves fed from a single transmitter 2 using the control mechanism 4, determining the phase to be output to each antenna element 9 so that the radio waves interfere constructively with each other at a specific point P to form jamming waves, and also determining the phase to be output to each antenna element 9 so that the directivity of each antenna 3 is formed. While this example shows power being fed to each antenna element 9 via a phase shifter 5 and an attenuator 8, the present invention is not limited to this method, and the configuration may also be such that output control is performed using an amplifier. Furthermore, the configuration of the main control unit 7 and the control unit 6 is not limited to this example, and the configuration may also be such that a single control unit 6 or main control unit 7 controls all devices.

[0054] The defense system 10 shown in Figure 10 is equipped with multiple transmitters 2, with an antenna 3 located on the output side of each transmitter 2, and is configured with a main control unit 7 that controls the multiple antennas 3 and a control unit 6 that controls each antenna 3. Each of the multiple antennas 3 is controlled by the main control unit 7, and the control unit 6 controls the transmitter 2 and the phase shifter 5 of each antenna element 9. The main control unit 7 and control unit 6 are not limited to this configuration example, and the configuration means is not limited to this example, and one control unit 6 or main control unit 7 may control all devices, for example.

[0055] The above-described defense system 10 also causes radio waves radiated from multiple antennas 3 to interfere with each other so as to intensify them at a specific point P, thereby forming a radio jamming wave at the specific point P. The specific radio waves radiated from the multiple antennas 3 are radiated in a specific direction by adjusting the directivity of each antenna 3, as shown in Figures 9 and 10, and the phase of each radio wave is adjusted so that the multiple radio waves interfere with each other in a constructive manner at the point where they intersect, forming a strong radio jamming wave. As described above, the antenna 3, which can adjust the directivity by controlling the phase of the radio waves radiated from the multiple antenna elements 9, can adjust the radio wave radiation direction by electrical control, so that it can simply and efficiently scan the radio waves to form a radio jamming area S while forming a jamming wave at a desired point.

[0056] This defense system 10 controls the phases of multiple phased array antennas 3X to scan radio waves emitted from the multiple antennas 3, thereby scanning jamming waves formed by interference within a specific two-dimensional or three-dimensional area to form a jamming area S. FIG. 12 shows an example of a defense system 10 that uses multiple antennas 3 to more efficiently form a jamming area S. The defense system 10 shown in the figure shows a state in which the jamming area S is formed by multiple antennas 3 arranged around a substantially rectangular area to be protected. The defense system 10 shown in the figure includes multiple antennas 3 arranged at the four corners of the rectangle (indicated by A to D in the figure) and multiple antennas 3 arranged in the centers of the four sides of the rectangle (indicated by E to H in the figure). The defense system 10 shown in the figure divides the jamming area S into multiple divided areas S1 to S4, and multiple sets of multiple antennas 3 are responsible for forming each of the divided areas S1 to S4. In the figure, divided area S1 is formed by antennas 3 located at A, B, and E, divided area S2 is formed by antennas 3 located at B, C, and F, divided area S3 is formed by antennas 3 located at C, D, and G, and further divided area S4 is formed by antennas 3 located at D, A, and H. In this way, by dividing the jamming area S into multiple divided areas S1 to S4 and assigning multiple sets of antennas 3 to each, it is possible to more efficiently scan radio waves and form the jamming area S.

[0057] [Embodiment 3] (Mobile Authentication System 20) FIG. 13 is a schematic diagram showing a mobile object authentication system according to one embodiment of the present invention. The mobile object authentication system 20 shown in this figure includes any of the defense systems 10 described above, an authenticated mobile object 11, and an authentication transmitter 12 that outputs radio waves containing information related to the operation of the authenticated mobile object 11. The authenticated mobile object 11 also has a detection unit 15 that detects the information related to the operation of the authenticated mobile object 11 from the radio waves output from the authentication transmitter 12. As described above, the mobile object authentication system 20 with this structure rescues the authenticated mobile object 11 that has been authenticated as a non-threatening mobile object, allowing it to operate even within the radio wave jamming area S, as shown in FIGS. 14 and 15. In this mobile object authentication system 20, the detection unit 15 provided in the authenticated mobile object 11 detects the information related to the operation of the authenticated mobile object 11 from the radio waves output from the authentication transmitter 12, enabling the authenticated mobile object 11 to operate normally even within the radio wave jamming area S.

[0058] (Authentication Mobile 11) As mentioned above, the authenticated mobile body 11 is a mobile body that does not pose a threat, and is a mobile body whose operation is specially permitted, such as a mobile body that is permitted to operate in a restricted area by law, an authenticated mobile body, or a mobile body that receives a service such as a subscription service. The mobile body authentication system 20 restricts, deters, and obstructs the operation of a threatening mobile body 1, while rescuing only the authenticated mobile body 11 so that it can circumvent the defense system 10 and operate.

[0059] The mobile object authentication system 20 rescues the authenticated mobile object 11 so that it can operate even at a location or a specific area where the defense system 10 is effective. At a specific location P or a specific radio wave jamming area S, the defense system 10 emits radio wave jamming waves. The mobile object authentication system 20 rescues the authenticated mobile object 11 by emitting these radio wave jamming waves separately from the radio wave jamming waves or by emitting the radio wave jamming waves themselves as authentication radio waves containing information necessary for the operation of the authenticated mobile object 11. When the authenticated mobile object 11 receives the authentication radio waves, the detection unit 15 of the authenticated mobile object 11 detects the information necessary for its operation from the received authentication radio waves, thereby enabling it to maintain normal operation.

[0060] Furthermore, the mobile authentication system 20 may encrypt the radio waves output from the authentication transmitter 12 or the information for detecting information related to operations contained in the radio waves, or the radio waves containing that information, and the detection unit 15 of the authenticated mobile body 11 may have means for decrypting the encrypted radio waves or the encrypted information contained in the radio waves.

[0061] (Authentication Transmitter 12) The mobile object authentication system 20 may include a dedicated transmitter 12 for outputting authentication radio waves to the authenticated mobile object 11. This mobile object authentication system 20 may include, for example, a plurality of authentication transmitters 12 and antennas 13 connected to these authentication transmitters 12, and each authentication transmitter 12 may output information for the authenticated mobile object 11 to perform location positioning using a different time signal or the like, thereby outputting a plurality of time signals to the authenticated mobile object 11. The authenticated mobile object 11 can maintain its operating state by calculating its location information from the time signal of the authentication radio waves output from the authentication transmitter 2 in the detection unit 15. Note that, instead of using time signals, each antenna 3 may output information for the authenticated mobile object 11 to perform location positioning using a signal including information about the directional characteristics of the radiated radio waves, or may output other information unrelated to location positioning that enables the authenticated mobile object 11 to operate normally.

[0062] Furthermore, the authentication transmitter 12 can also use the antenna 3 of the defense system 10, without providing a dedicated antenna 13. This structure has the advantage of reducing manufacturing costs by using the antenna provided in the defense system to transmit the radio waves output from the authentication transmitter 12.

[0063] Furthermore, the mobile object authentication system 20 can also use the transmitter 2 of the defense system 10 as the authentication transmitter 12, without providing a dedicated authentication transmitter 12. In this case, the transmitter 2 of the defense system 10 outputs radio waves that form jamming waves, and outputs the radio waves that form the jamming waves and authentication radio waves at a predetermined interval. For example, the transmitter 2 alternately outputs the radio waves that form the jamming waves and the authentication radio waves as pulse waves at a predetermined cycle, allowing the authenticated mobile object 11 that receives the authentication radio waves to maintain normal operation by detecting the authentication radio waves from the received radio waves at the detection unit 15 of the authenticated mobile object 11. Alternatively, the transmitter 2 can use the radio waves that form the jamming waves as authentication radio waves, outputting them as pulse waves at a predetermined cycle. When the mobile object 1 receives these radio waves, their operation is restricted, inhibited, or hindered by the jamming waves. However, the authenticated mobile object 11 can maintain normal operation by detecting the authentication radio waves from the received radio waves at the detection unit 15 of the authenticated mobile object 11.

[0064] The encrypted radio waves can be encrypted by, for example, spectrum spreading. In this case, the detection unit 15 of the authenticated mobile object 11 detects the authentication radio waves by acquiring and generating a spreading code and a despreading code, and can operate the authenticated mobile object 11 normally based on the detected authentication radio waves.

[0065] Furthermore, by outputting radio waves containing encrypted information, for example, by including information encrypted with a common encryption key in the radio waves, only the authenticated mobile unit 11 that has the public encryption key can decrypt the information contained in the radio waves, and the authenticated mobile unit 11 can operate normally based on this detected authentication radio waves. The detection unit 15 of the authenticated mobile unit 11 stores the public encryption key, and decrypts the radio waves containing encrypted information based on this stored public encryption key.

[0066] [Embodiment 4] (Radar System 30) 16 and 17 are schematic diagrams showing radar systems according to one embodiment and another embodiment. The radar system 30 shown in these figures includes any of the defense systems 10 described above, a receiver 32 that receives radio waves radiated from multiple antennas 3 of the defense system 10 and reflected by the mobile body 1 or authenticated mobile body 11, and a mobile body detection unit 34 that detects information about the movement of the mobile body 1 based on the radio waves received by the receiver 32. In this radar system 30, the radio waves radiated from the antennas 3 of the defense system 10 are reflected by the mobile body 1 or authenticated mobile body 11, and the receiver 32 receives the reflected radio waves, allowing the mobile body detection unit 34 to detect information about the movement of the mobile body 1 or authenticated mobile body 11.

[0067] (Receiver 32) The receiver 32 receives radio waves emitted from the antenna 3 of the defense system 10 and reflected by the mobile body 1 or the authenticated mobile body 11. As shown in Figures 16 and 17, the radio waves reflected by the mobile body 1 or the authenticated mobile body 11 are reflected waves of radio waves output from the transmitter 2 and emitted from the antenna 3 in order to restrict, deter, or interfere with the operation of the mobile body 1 or the authenticated mobile body 11, and are applied to the radar system 30. The receiver 32 shown in Figure 16 is connected to an antenna 33 that receives radio waves reflected from the mobile body 1 or the authenticated mobile body 11. As shown in this figure, the receiver 32 can be installed independently for the radar system 30. Also, as shown in Figure 17, multiple antennas 3 of the defense system 10 can also be used as antennas 33 for receiving reflected waves. According to this radar system 30, radio waves emitted from the antenna 3 of the defense system 10 are reflected by the mobile body 1 or the authenticated mobile body 11, and the reflected radio waves are received by the receiver 32 via the antenna 3, so that the mobile body detection unit 34 detects information regarding the movement of the mobile body 1 or the authenticated mobile body 11.

[0068] [Embodiment 5] 18 is a schematic diagram showing an example of a radar system according to another embodiment of the present invention. The radar system 30 shown in this figure is configured such that a defense system 10 emits different radio waves L1, L2 from the multiple transmitters 2, and a receiver 32 receives reflected waves R1, R2 from the radio waves reflected by the mobile object 1 or the authenticated mobile object 11, thereby detecting information about the movement of the mobile object 1 or the authenticated mobile object 11.

[0069] (Multiple Transmitters 2) Multiple transmitters 2 can be configured as a more accurate radar system such as a MIMO radar by outputting and emitting radio waves different from the radio waves output from the transmitters 2 to restrict, inhibit, or jam the operation of the mobile object 1. Furthermore, a radar system can also be configured by outputting and emitting different radio waves for each transmitter 2, in addition to the radio waves emitted from the transmitters 2 to restrict, inhibit, or jam the operation of the mobile object 1. Alternatively, radio waves output from the authentication transmitter 12 that transmits radio waves containing information related to operation and radiated from the antenna 3 can also be used in a radar system. Note that the radio waves output from the authentication transmitter 12 and radiated from the antenna 13 described above can also be used in a radar system.

[0070] (Receiver 32) The receiver 32 detects information relating to the movement of the mobile body 1 by receiving and calculating the reflected waves R1 and R2 reflected by the mobile body 1 or the authenticated mobile body 11 from the radio waves output from the multiple transmitters 2 and authentication transmitters 12 and radiated from the antenna 3 and antenna 13. This receiver 32 may be installed independently for the radar system 30, or may be configured so that the radio waves radiated from the antenna 3 of the defense system 10 are reflected by the mobile body 1 or the authenticated mobile body 11, and the receiver 32 receives these reflected waves R1 and R2 via the antenna 3, thereby allowing the mobile body detection unit 34 to detect information relating to the movement of the mobile body 1 or the authenticated mobile body 11.

[0071] [Embodiment 6] 19 is a schematic diagram showing an example of a radar system according to another embodiment of the present invention. In the radar system 30 shown in this figure, a defense system 10 or a mobile object authentication system 20 outputs radio waves from multiple transmitters 2 or authentication transmitters 12 and radiates them from antennas 3 and 13. These radio waves would normally be received by a receiver 32, but a mobile object detection unit 34 detects that this was not possible, thereby detecting information that a mobile object 1 or an authentication mobile object 11 that blocks the radio waves has moved across the path of the radio waves.

[0072] [Embodiment 7] 20 is a schematic diagram showing an example of a positioning system according to one embodiment of the present invention. In the positioning system 40 shown in this figure, information relating to the movement of the mobile object 1 or the authenticated mobile object 11 detected by the radar system 30 is transmitted from a mobile object detection unit 34 to a movement information transmission control mechanism 44, and a movement information transmitter 42 transmits the information relating to the movement to the authenticated mobile object 11, thereby locating the position of the authenticated mobile object 11. [Industrial Applicability]

[0073] The present invention contributes to security and crisis management by making it possible to restrict, deter, or obstruct the movements of threatening mobile objects and eliminate the threat. [Explanation of symbols]

[0074] 1...Mobile object 2...Transmitter 3...Antenna 3X...phased array antenna 4. Control mechanism 5...Phase shifter 6...Control section 7...Main control unit 8...Attenuator 9...Antenna element 10. Defense System 11...Authentication Mobile 12...Authentication transmitter 13...Antenna 14...Control mechanism 15...Detection unit 20...Mobile authentication system 30...Radar system 32...Receiver 33...Antenna 34...Moving object detection unit 40...Positioning system 42...Mobile information transmitter 43...Antenna 44...Mobile information transmission control mechanism P...specific point S…Radio interference area

Claims

1. One or more transmitters that output specific radio waves; a plurality of antennas capable of radiating radio waves output from the transmitter in specific directions; The radio waves radiated from the plurality of antennas are interfered with at a specific point so as to be strengthened, thereby forming radio jamming waves at the specific point, A defense system characterized by scanning radio waves radiated from the plurality of antennas and scanning the jamming waves within a specific two-dimensional or three-dimensional area to form a jamming area.

2. 10. The defense system of claim 1, The plurality of antennas a plurality of antenna elements; a control mechanism for controlling the phase of radio waves fed to the plurality of antenna elements, A defense system characterized in that the control mechanism controls the directivity of the antenna.

3. A defense system according to claim 1 or 2; an authenticated mobile device; an authentication transmitter that outputs radio waves containing information related to the operation of the authenticated mobile object; A mobile object authentication system, wherein the authenticated mobile object comprises a detection unit that detects information relating to the operation of the authenticated mobile object from the radio waves output from the authentication transmitter.

4. 4. The mobile authentication system according to claim 3, The radio waves output from the authentication transmitter or the information for detecting the operation contained in the radio waves is encrypted, A mobile authentication system, wherein the detection unit of the mobile authentication unit has means for decrypting the encrypted radio waves or the encrypted information contained in the radio waves.

5. 4. The mobile authentication system according to claim 3, A mobile authentication system in which the transmitter of the defense system is also used as the authentication transmitter.

6. A mobile authentication system as described in claim 4, A mobile authentication system in which the transmitter of the defense system is also used as the authentication transmitter.

7. A defense system according to claim 1 or 2; a receiver for receiving radio waves radiated from the plurality of antennas and reflected by a moving object; a moving object detection unit that detects information about the movement of a moving object based on the radio waves received by the receiver; A radar system comprising:

8. 8. A radar system according to claim 7, A radar system characterized in that different radio waves are radiated from the plurality of antennas.

9. A defense system according to claim 1 or 2; a receiver that detects that radio waves radiated from the plurality of antennas are obstructed by a moving object; a moving object detection unit that detects information relating to the movement of a moving object based on information detected by the receiver; A radar system comprising:

10. A radar system according to claim 7; an authenticated mobile object; Information regarding the movement of a moving object detected by the radar system, A positioning system characterized by having a mechanism for transmitting to the authenticated mobile body.

11. A radar system according to claim 8; an authenticated mobile object; Information regarding the movement of a moving object detected by the radar system, A positioning system characterized by having a mechanism for transmitting to the authenticated mobile body.

12. A radar system according to claim 9; an authenticated mobile object; Information regarding the movement of a moving object detected by the radar system, A positioning system characterized by having a mechanism for transmitting to the authenticated mobile body.

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