KR102223024B1 - ultra-light anti-drone jamming system and its method - Google Patents

Abstract

The present invention relates to an ultra-lightweight anti-drone jamming system and method that is easy to carry by receiving only radio waves generated by an anti-drone to generate a jamming signal, and by reducing power consumption of the jamming signal to reduce the capacity of a battery.
The ultra-lightweight anti-drone jamming system of the present invention includes an antenna that transmits and receives radio waves, a radio wave receiver that receives radio waves from the antenna, a control unit that analyzes a received signal from the radio wave receiver to generate a jamming signal, a radio wave transmitter that transmits a radio wave of the jamming signal, and It consists of a radio wave receiving unit, a control unit, and a battery supplying electric power to the radio wave transmitting unit.

Description

Ultra-light anti-drone jamming system and its method}

The present invention relates to an ultra-lightweight anti-drone jamming system and method, and more particularly, to transmit a jamming signal to the anti-drone by analyzing radio waves generated by the anti-drone. That is, the present invention relates to an ultra-lightweight anti-drone jamming system and method capable of disabling an anti-drone by transmitting a jamming signal to the anti-drone.

A drone, which is an unmanned aerial vehicle, is a vehicle that a pilot remotely controls from the ground without directly boarding the vehicle, and can float in the air by the rotation of a propeller, and can be flown by induction of radio waves. Drones are designed for easy remote control from a long distance, and with the development of wireless technology, drones, which are small flying objects for wireless reconnaissance owned by individuals, not for military use, are commercially available and used.

Drones are manipulated so that they can be equipped with cameras for fire fighting or approaching disaster areas, capturing terrain information, or for broadcasting and military purposes. In addition, with a little skill, anyone can easily fly a drone and send it to a place that is difficult to access, so there is always a risk of falls and accidents, and the functional characteristics of drones developed for military use can be exploited for crime or terrorism. There is also a threat of privacy invasion, such as wearing a camera and taking pictures secretly, so there is a need for a plan to neutralize the abused anti-drones.

For example, in Korean Patent Laid-Open Publication No. 10-2017-0126224, anti-drones intruding in a specific area are disabled in advance, but in particular, it detects a signal for anti-drone control and transmits a blocking signal that neutralizes the signal. By doing so, we studied an anti-drone blocking system that provides the construction of a strong anti-drone defense facility.

However, this system has a disadvantage that it is heavy to carry.

Korean Patent Laid-Open Publication No. 10-2017-0126224 (2017.09.28.)

An object of the present invention is to provide an ultra-lightweight anti-drone jamming system and method for generating jamming signals by receiving only radio waves generated by the anti-drone.

Another object of the present invention is to provide an ultra-lightweight anti-drone jamming system and method that is easy to carry by reducing the power consumption of a jamming signal and reducing the capacity of a battery.

The ultra-lightweight anti-drone jamming system according to the present invention includes an antenna for transmitting and receiving a radio wave, a radio wave receiving unit receiving radio waves from the antenna, a control unit generating a jamming signal by analyzing a received signal of the radio wave receiving unit, a radio wave transmitting unit transmitting radio waves of the jamming signal, And a battery that supplies power to the radio wave receiver, the control unit, and the radio wave transmitter.

Here, the antenna may form at least one radiation pattern of directional or non-directional.

In addition, the antenna may have a directional or non-directional radiation pattern respectively or simultaneously according to a gain and a phase of the array antenna.

Here, the controller may extract the radiation frequency of the anti-drone among the received signals by controlling the radiation pattern of the antenna.

In addition, the controller may control the radiation pattern of the antenna to extract the distance to the anti-drone.

Here, the radio wave transmitter may transmit a jamming signal in the form of a pulse.

In addition, the controller may control the power of the jamming signal according to the distance from the anti-drone.

On the other hand, the control unit may control the directing width of the radiation pattern according to the distance from the anti-drone.

An ultra-lightweight anti-drone jamming method according to another embodiment of the present invention includes a radio wave receiving step of receiving a radio wave from a radio wave receiving unit, a radio wave analysis step of generating a jamming signal by analyzing the received radio wave in a control unit, and a radio wave transmitting unit for the generated jamming signal. It may include a radio wave transmission step of transmitting a radio wave at.

The ultra-lightweight anti-drone jamming system and method according to the present invention has the advantage of generating a jamming signal by receiving only radio waves generated by the anti-drone.

In addition, the ultra-lightweight anti-drone jamming system and method according to the present invention has the advantage of being easy to carry by reducing the power consumption of the jamming signal and reducing the capacity of the battery.

1 is a block diagram showing an ultra-lightweight anti-drone jamming system according to an embodiment of the present invention.
2 is a diagram showing in detail a radiation pattern of a transmission signal radiated from the antenna of FIG. 1.
3 is a diagram illustrating in detail an array antenna generating the radiation pattern of FIG. 2.
4 is a detailed signal waveform showing a difference in frequency characteristics of a received signal according to the antenna characteristics of FIG. 1.
5 is a detailed signal waveform showing a difference in received signal power according to the antenna characteristics of FIG. 1.
6 is a signal waveform showing a jamming signal transmitted from the antenna of FIG. 1.
7 is a diagram illustrating a change in a radiation pattern according to power of a transmission signal radiated from the antenna of FIG. 1.
8 is a diagram illustrating a change in a radiation pattern according to a radiation direction width of a transmission signal radiated from the antenna of FIG. 1.
9 is a flow chart showing an ultra-lightweight anti-drone jamming method according to an embodiment of the present invention.

A specific embodiment for carrying out the present invention will be described with reference to the accompanying drawings.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to a specific embodiment, it can be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

Hereinafter, an ultra-lightweight anti-drone jamming system and method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an ultra-lightweight anti-drone jamming system according to an embodiment of the present invention, and FIGS. 2 to 8 are detailed views and signal waveforms for describing FIG. 1 in detail.

Hereinafter, an ultra-lightweight anti-drone jamming system according to an embodiment of the present invention may be described with reference to FIGS. 1 to 8.

First, referring to FIG. 1, the ultra-lightweight anti-drone jamming system according to an embodiment of the present invention includes an antenna 100 for transmitting and receiving a radio wave, a radio wave receiving unit 200 for receiving radio waves from the antenna 100, and a radio wave receiving unit 200. ), the control unit 300 for generating a jamming signal by analyzing the received signal, the electric wave transmitting unit 400 for transmitting the electric wave of the jamming signal, and the electric wave receiving unit 200, the control unit 300, and the electric wave transmitting unit 400 It consists of a battery 500 to supply.

In order to satisfy the characteristics of the ultra-lightweight anti-drone jamming system, the antenna 100 has a structure capable of controlling directivity and omni-directionality, and through this, it is possible to accurately measure the frequency and distance of the anti-drone by removing ambient noise.

In addition, the controller 300 analyzes the signal of the anti-drone, controls the radiation pattern and power according to the distance of the anti-drone, and transmits a jamming signal in the form of a pulse with a reduced transmission time, thereby reducing battery power. By minimizing the power, there is an effect that can produce an ultra-lightweight anti-drone jamming system.

FIG. 2 is a diagram showing in detail a radiation pattern of a transmission signal radiated from the antenna 100 of FIG. 1.

As can be seen in FIG. 2, the antenna 100 may form a directional or omni-directional radiation pattern.

At this time, the radio wave receiving unit 200 may simultaneously receive ambient noise and radio waves received in the anti-drone direction through the omni-directional antenna and the directional antenna, and perform analysis on a frequency having a large size of the radio wave received in the anti-drone direction. .

Here, the radiation pattern is the angle at which the concentrated radiation pattern R300 is divided compared to the transmission direction of the radiation pattern with respect to the concentrated radiation pattern R300 in which power is concentrated, and is referred to as a half-value angle R220, and the radiation of the concentrated radiation pattern R300. The width may be expressed as an anterior tooth angle R210. Here, the preposition angle R210 may be classified and received by the radio wave receiving unit 200 by signal processing.

Accordingly, there is an effect of reducing the size of the radio wave transmitting unit 400 for transmitting the jamming signal by generating and transmitting the jamming signal by selecting only the frequencies in the anti-drone direction without analyzing various frequencies using such a radiation pattern.

3 is a diagram showing in detail the array antenna 110 generating the radiation pattern of FIG. 2.

As can be seen from FIG. 3, the antenna 100 may have a directional or non-directional radiation pattern respectively or simultaneously according to a gain and a phase of the array antenna 110.

That is, the antenna 100 is composed of a plurality of array antennas 110, and the radiation pattern radiated from the antenna 100 according to the distance between the array antennas 110, the signal phase of each of the array antennas 110, and the signal size. Is determined.

In this case, at least two unillustrated reception signal combining units for combining the received signal phase and the received signal magnitude of the array antenna 110 may be provided in the radio wave receiving unit 200, and according to a method of combining the respective received signal combining units. Since directivity and omnidirectionality can be simultaneously received from one antenna 100, there is an effect of reducing the size of the antenna 100.

4 is a detailed signal waveform showing a difference in frequency characteristics of a received signal according to characteristics of the antenna 100 of FIG. 1.

As can be seen in FIG. 4, the controller 300 may control the radiation pattern of the antenna 100 to extract the radiation frequency of the anti-drone among the received signals.

4(a) is a signal waveform showing the frequency characteristics of the received signal when the antenna 100 is omnidirectional, and FIG. 4(b) is a signal waveform showing the frequency characteristics of the received signal when the antenna 100 is directional. to be.

That is, as mentioned in FIG. 3, by canceling the omni-directional characteristic of the antenna 100 from the directional characteristic of the antenna 100, only the frequency generated by the anti-drone can be extracted, which is the reception of the omni-directional characteristic signal of the antenna 100 The drone generation frequency spectrum R410, which is a signal additionally appearing in the directivity characteristic of the antenna 100 compared to the frequency spectrum R400, may be extracted by filtering in the radio wave receiving unit 200.

Therefore, by analyzing the output of the two reception signal combiners for a signal of one antenna 100, there is an advantage in that only frequencies generated by the anti-drone can be easily extracted.

5 is a signal waveform detailing the difference in received signal power according to the characteristics of the antenna 100 of FIG. 1.

As can be seen in FIG. 5, the controller 300 may control the radiation pattern of the antenna 100 to extract a distance to the anti-drone.

FIG. 5(a) is a signal waveform showing the received signal power when the antenna 100 is omnidirectional, and FIG. 5(b) is a signal waveform showing the received signal power when the antenna 100 is directional.

That is, as mentioned in FIG. 3, only the signal generated by the anti-drone can be extracted by canceling the omni-directional characteristic of the antenna 100 from the directional characteristic of the antenna 100. At this time, the control unit 300 converts the received signal of the antenna 100 into a distance and analyzes it to extract the distance of the anti-drone, which is compared to the received power distribution (R500), which is an omni-directional characteristic signal of the antenna 100. The drone generated power distribution R510, which is a signal additionally appearing in the directional characteristic of 100, may be extracted by filtering in the radio wave receiving unit 200.

Accordingly, there is an advantage in that the distance to the anti-drone can be easily extracted by analyzing the output of the two reception signal combiners for the signal of one antenna 100.

6 is a signal waveform showing a jamming signal transmitted from the antenna 100 of FIG. 1.

As can be seen in FIG. 6, the radio wave transmitter 400 may transmit a jamming signal in the form of a pulse.

6(a) and 6(b) show the pulse form of the same power per unit time, and Fig. 6(a) is a signal waveform showing a high-speed low-power pulse, and Fig. 6(b) is a low-speed high-power pulse. It is a signal waveform representing a pulse.

That is, the radio wave transmitter 400 transmits radio waves at a frequency received from the anti-drone, but does not continuously transmit, but transmits in the form of a pulse, thereby saving power of the battery 500. At this time, the power of the battery 500 can be saved. Accordingly, the low-power high-speed pulse signal R610 and the high-power low-speed pulse signal R620 can be used separately. In addition, by effectively using the battery capacity, there is an effect that an ultra-lightweight anti-drone jamming system can be manufactured.

7 is a diagram illustrating a change in a radiation pattern according to the power of a transmission signal radiated from the antenna 100 of FIG. 1.

As can be seen in FIG. 7, the controller 300 may control the power of the jamming signal according to the distance from the anti-drone.

That is, if the reception intensity is small according to the size of the received signal received from the radio wave receiving unit 200, the anti-drone is far away, so the high-power radiation pattern R120 is used, and when the reception intensity is large, the anti-drone is close. By using the radiation pattern R110, a jamming signal of the same size is affected irrespective of the distance of the anti-drone, and thus, it is possible to manufacture an ultra-lightweight anti-drone jamming system by effectively using the battery capacity.

FIG. 8 is a diagram illustrating a change in a radiation pattern according to a transmission signal radiation direction width radiated from the antenna 100 of FIG. 1.

As can be seen in FIG. 8, the controller 300 may control the directing width of the radiation pattern according to the distance to the anti-drone.

That is, by adjusting the beam width of the antenna, it is possible to adjust the beam width according to the case where there is an anti-drone in a long distance or in a short distance.

In other words, the effect of enabling the transmission to a long distance using the narrowband radiation pattern (R140) when in a long distance, and accurately performing jamming for the movement of the anti-drone using the wideband radiation pattern (R130) when in a short distance. There is.

Therefore, it is possible to manufacture an ultra-lightweight anti-drone jamming system by reducing the capacity of a battery required for transmission power by effectively transmitting the antenna by adjusting the antenna directional width according to the position of the anti-drone.

9 is a flow chart showing an ultra-lightweight anti-drone jamming method according to an embodiment of the present invention.

As can be seen in FIG. 9, the ultra-lightweight anti-drone jamming system receives radio waves from the radio wave receiver 200 (S100), and generates a jamming signal by analyzing the received radio waves in the controller 300 (S200). , And transmitting a radio wave from the radio wave transmitting unit 400 to the generated jamming signal (S300).

In order to satisfy the characteristics of the ultra-lightweight anti-drone jamming system, the antenna 100 has a structure capable of controlling directivity and omni-directionality, and through this, it is possible to measure the frequency and distance of the anti-drone.

In addition, the controller 300 analyzes the signal of the anti-drone, controls the radiation pattern and power according to the distance of the anti-drone, and transmits the jamming signal in the form of a pulse, thereby reducing battery power. By minimizing this power consumption, , It has the effect of making an ultra-lightweight anti-drone jamming system.

As described above, the ultra-lightweight anti-drone jamming system and method according to the present invention has the advantage of generating a jamming signal by receiving only radio waves generated from the anti-drone, and has the advantage of being easy to carry by reducing the power consumption of the jamming signal and reducing the capacity of the battery. have.

What has been described above includes examples of one or more embodiments. Of course, not all possible combinations of components or methods can be described for the purpose of describing the above-described embodiments, but those skilled in the art will recognize that many additional combinations and substitutions of various embodiments are possible. Accordingly, the described embodiments are intended to cover all alternatives, modifications and adaptations that fall within the spirit and scope of the appended claims.

Claims (9)

An antenna for transmitting and receiving radio waves;
A radio wave receiver for receiving radio waves from the antenna;
A control unit for generating a jamming signal by analyzing the received signal of the radio wave receiving unit;
A radio wave transmitter for transmitting radio waves of the jamming signal; And
Including; a battery for supplying power to the radio wave receiving unit, the control unit, and the radio wave transmitting unit,
The antenna forms at least one radiation pattern of directional or non-directional,
Depending on the gain and phase of the array antenna, a directional or omni-directional radiation pattern is formed individually or simultaneously,
The control unit controls the radiation pattern of the antenna to extract a radiation frequency of the anti-drone among the received signals,
By simultaneously receiving ambient noise and radio waves received from the anti-drone direction through an omni-directional antenna and a directional antenna, analyzes the frequency with a large size of the radio wave received in the anti-drone direction, and selects only the frequencies in the anti-drone direction. Generate and transmit a jamming signal,
By controlling the radiation pattern of the antenna to extract the distance to the anti-drone,
The anti-drone distance is extracted by converting the received signal of the antenna into a distance and filtering a drone-generated power distribution, which is a signal additionally appearing in the directional characteristic of the antenna, compared to the received power distribution, which is an omni-directional characteristic signal Ultra-lightweight anti-drone jamming system. delete delete delete delete The method of claim 1,
The radio wave transmitter is an ultra-lightweight anti-drone jamming system, characterized in that for transmitting a jamming signal in the form of a pulse. The method of claim 1,
The controller is an ultra-lightweight anti-drone jamming system, characterized in that controlling the power of the jamming signal according to the distance to the anti-drone. The method of claim 1,
The control unit is an ultra-lightweight anti-drone jamming system, characterized in that controlling the beam width of the radiation pattern according to the distance to the anti-drone. A radio wave receiving step of receiving a radio wave from a radio wave receiving unit;
A radio wave analysis step of generating a jamming signal by analyzing the received radio wave in a control unit; And
Including; a radio wave transmitting step of transmitting a radio wave by a radio wave transmitting unit on the generated jamming signal,
In the radio wave reception step, at least one of a directional or non-directional radiation pattern of an antenna is formed,
Depending on the gain and phase of the array antenna, a directional or omni-directional radiation pattern is formed individually or simultaneously,
In the radio wave analysis step, by controlling the radiation pattern of the antenna to extract the radiation frequency of the anti-drone from the received signal,
By simultaneously receiving ambient noise and radio waves received from the anti-drone direction through an omni-directional antenna and a directional antenna, analyzes the frequency with a large size of the radio wave received in the anti-drone direction, and selects only the frequencies in the anti-drone direction. Generate and transmit a jamming signal,
By controlling the radiation pattern of the antenna to extract the distance to the anti-drone,
The anti-drone distance is extracted by converting the received signal of the antenna into a distance and filtering a drone-generated power distribution, which is a signal additionally appearing in the directional characteristic of the antenna, compared to the received power distribution, which is an omni-directional characteristic signal of the antenna. Ultra-lightweight anti-drone jamming method.

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