JPH08200995A - Radio jamming apparatus - Google Patents

Abstract

PURPOSE: To obtain a radio jamming apparatus for avoiding the tracking of an opponent in a short time or tracking to transfer by radio jamming against the attack of a radio guided missile. CONSTITUTION: The flying bearing of a missile 3 searched by a radio searcher 4 and the distance of the missile searched by the radar of a surface ship 8 are input to a computer 22, the distance of the ship and a radio jamming bullet as seen from the missile is calculated, and a jamming wave delay time for inputting the jamming wave to the range gate of the missile is calculated from the distance difference. The delay time is designated to a radio jamming bullet 2 by a remote controller 6, and the output of the jamming pulse is delayed. Accordingly, the jamming wave can be effectively fallen in the range of the range gate of the missile, the missile approaching at a high speed can be coped with it in a short time, thereby sufficiently obtaining the effective jamming continuous time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave jamming device for jamming or deceiving a radio wave guided missile.

[0002]

2. Description of the Related Art In order to avoid attacks by missiles on surface ships and the like, this is a type of radio interference device that interferes with and deceives missiles, which is ejected from surface ships and suspended by parachutes and hovering rockets. However, there are radio jamming devices that emit jamming radio waves. The operation of such a radio interference device will be described with reference to FIG. In the figure, 1 is a fixed launcher, 2 is a radio interference bullet, 3 is a missile, 4 is a radio wave detection device that detects radio waves of the missile 3 and issues an alarm, 5 is a control panel that controls the radio interference jammer 2, and 6 is an ejection. A remote controller for remotely controlling the later radio interference bullets, 7 is an antenna for transmitting remote control radio waves, and 8 is a surface ship for emitting the radio interference bullets.

In the conventional radio wave jamming device, when the radio wave detecting device 4 detects that the missile 3 is tracking its own ship,
Launch a radio jammer 2 from the launcher 1. After reaching the predetermined altitude, the emitted radio wave interference bullet stably floats with a parachute or hovering rocket, etc., and transmits an interference radio wave toward the missile 3 during this period. The radio wave detection device 4 analyzes the incoming direction and transmission frequency of the missile, and the result is analyzed by the control board 5
Then, the signal is transmitted from the antenna 7 to the radio jamming bullet 2 via the remote controller 6. The radio jamming bullet 2 transmits a jamming / deception radio wave at a direction and a frequency designated by remote control, and avoids the tracking of the missile 3 or transfers it to the radio jamming bullet to protect the own ship.

FIG. 5A is a block diagram of a radio wave jamming bullet of a conventional radio wave jamming device. In the figure, 9 is O when receiving
N receiving switch, 10 amplifier for amplifying received signal, 11 mixer, 12 bandpass filter, 13 frequency memory, 14 trigger circuit for supplying trigger to frequency memory, 15 transmission turned on during transmission switch,
16 is a traveling wave tube (hereinafter referred to as TWT) that amplifies a transmitted wave, 17 is a directional coupler that extracts a received signal, 18 is a transmission / reception antenna, 19 is a remote control antenna that receives a remote control signal, and 20 is a remote control The receiver, 21 is a local oscillator. The received signal shown in (a) of FIG.
The antenna 18 receives the radio waves transmitted by the missile,
It is a signal input to the amplifier 10 via the directional coupler 17 and the reception switch 9. The frequency memory input shown in (b) is obtained by converting the output signal of the amplifier 10 and the local signal of the local oscillator 21 to an intermediate frequency by the mixer 11 and the bandpass filter 12, and is input to the frequency memory 13. The local oscillator 21 is controlled to the frequency designated by the remote control radio wave and follows the frequency band of the missile. The frequency memory output shown in (c) is obtained by extracting the signal stored in the frequency memory 13 at the timing of the trigger circuit 14. The time T
f is a delay time peculiar to the radio wave interference bullet, which is usually the received signal pulse width + 0.2 μs. The TWT gate shown in (d) indicates a section in which the TWT 16 operates. (E)
The transmission signal shown in (1) is obtained by converting the output signal of the frequency memory and the local signal of the local oscillator to the original frequency by the mixer 11 and the bandpass filter 12, and goes from the antenna 18 to the missile via the transmission switch 15 and the TWT 16. Sent.

[0005]

FIG. 6 shows an operational concept diagram of a conventional radio wave jamming device. In the figure, in the situation where the missile 3 is approaching the surface ship 8 while transmitting the guide radio wave,
The surface ship has just detected this induced radio wave and immediately launched a radio wave jammer 2 to start jamming the missile. Here, the missile is for tracking a target existing in the range of a tracking cell composed of the antenna beam width of the guiding section and the range gate. In such a situation, it is necessary to put the interfering wave within the range of this tracking cell in order to transfer the tracking to the radio interference bullet. The range gate shown in (a) of FIG. 6 (C) indicates a range in which the missile tracks. Since the range gate width is generally set to about twice the transmission pulse width, for example, the transmission pulse width of the missile is 0.
In the case of 5 μs, the range gate width is 1 μs. Converted to distance, 3 x 10 ⁸ x 10 ^-6 x 1/2 = 150 m
Is. On the other hand, since the flight distance of the radio interference bullet is several hundred meters or more, it will fall outside the tracking cell as shown in FIG. 6 (B). In addition, in order to secure the jamming duration (equal to the airtime of the jamming bomb) for a certain time or longer, it is necessary to eject the radio jammer to a predetermined altitude, and inevitably a flight distance of several hundred meters or more is required. Become. The received video shown in (b) shows the case where the missile is tracking a surface ship. Although the target echo and the interference wave due to the radio interference bullet are received at the same time, since the position of the interference wave is out of the range of the range gate, the tracking transition does not occur as it is. As described above, in the conventional radio jamming device, the launcher 1 is fixed, so that the ejection direction is fixed regardless of the missile's incoming direction, and the output pulse timing of the jamming radio wave of the jamming bullet cannot be delayed. , It takes time for the jamming to work effectively,
There is a problem that it is difficult to quickly deal with an approaching missile.

The present invention has been made in order to solve the above-mentioned problems, and the interference wave caused by the radio wave interference bullet is made to enter the range of the tracking cell of the missile from the beginning so that the approaching distance can be improved. Respond to missiles in a short time,
Moreover, it is an object of the present invention to provide a radio wave jamming device that effectively secures the jamming duration time.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a remote controller indicates a position of an optimum interfering wave calculated by a computer with respect to an ejected electromagnetic wave, and delays a trigger signal inside the electromagnetic wave. By delaying to the above indicated value by the circuit,
The interference wave is output to an optimum position where the interference effect can be obtained.

Further, the continuous pulse generating circuit is connected to the trigger circuit inside the radio interference bullet, the output pulse of the frequency memory is set to a plurality of pulses, and the pulse period is set to the optimum period calculated by the above-mentioned computer. One of the plurality of pulses is always positioned at the position where the effect is obtained.

[0009]

With the radio interference device constructed as described above, by calculating the optimum interference position by the computer from the position relationship between the surface ship and the interference bullet, the interference wave can be reliably generated within the range of the missile tracking cell. It can be inserted, and it becomes possible to expect avoidance of tracking or transition of tracking from the time of starting interference.

[0010]

【Example】

Example 1. FIG. 1 is a diagram for explaining the operation of a radio wave jamming apparatus according to an embodiment of the present invention. Reference numerals 1 to 8 are exactly the same as those of the conventional apparatus, and numeral 22 is for calculating conditions for the jamming wave to function effectively. It is a calculator. FIG. 2 is a block diagram of a radio wave jamming bullet of the radio wave jamming device according to the embodiment of the present invention.
Numerals 21 to 21 are exactly the same as those of the conventional apparatus, and numeral 23 is a delay circuit for delaying the trigger signal.

In FIG. 1, when the radio detecting device 4 detects that the missile 3 is tracking its own ship, the launcher 1 emits a radio interference bullet 2 to interfere with the missile as in the case of the conventional radio interference device. To start. On the other hand, the computer 22 obtains the distances of the surface ship and the radio interference bullets as seen from the missile from the missile flight direction detected by the radio wave detection device 4 and the distance information to the missile detected by the radar of the own ship. The delay time Td of the interfering wave is calculated in order to cause the interfering wave to appear at the position where it becomes zero. This delay time is calculated by the following formula.

[0012]

[Equation 1]

As shown in FIG. 6 (B), Rj is the distance from the missile to the radio interference bullet, Rs is the distance between the missile and the surface ship, θ is the missile flight direction, and r is the radio interference flight. Shou distance, φ is the launch direction of the jammer, R
d is the distance difference between the surface ship and the radio interference bullet, Td is the delay time of the interference wave, and Tf is the delay time specific to the radio interference bullet. For example, Rs is 20km, θ is 80 °, r is 700m, φ
When 30 ° Tf is 0.7μs, Rd is 489m
And Td becomes 2.6 μs. This delay time is transmitted from the remote controller 6 through the antenna 7 to the radio interference bullet. In the case of a radio wave interference bullet, as shown in FIG. 2, the remote control antenna 19 and the remote control receiver 20 receive this signal and instruct the delay circuit 23 of the delay time Td. As a result,
As shown in (c) of (B), the frequency memory output is generated at a position delayed by the delay time Td.

This frequency memory output is converted to the same frequency as the original guided radio wave by the local signal of the local oscillator 21, the mixer 11 and the bandpass filter 12, and the TW
After being amplified to the required power at T16, it is radiated toward the missile. Therefore, an interfering wave will appear very close to the target echo of the surface ship being tracked by the missile, and the range gate of the missile will change from the target echo of the surface ship to the interfering wave as shown in (e) and (f). Tracking transition.

Example 2. FIG. 3 is an internal block diagram of a radio wave jamming bullet of the radio wave jamming device of the second embodiment of the present invention. 9 to 21 are exactly the same as those of the above conventional device.
Is a continuous pulse generation circuit.

In the first embodiment, the optimum delay time T is set so that the interference wave appears within the range of the missile range gate.
Although d was calculated by a computer, in this embodiment, the interference wave is a continuous pulse, and the pulse period Tr is calculated by the same formula as that shown in the first embodiment, so that the same interference effect can be expected. It is a thing. In FIG. 3, the remote control antenna 19 and the remote control receiver 20 receive signals, and indicate the pulse period Tr to the continuous pulse generation circuit 24. As a result, the frequency memory output is continuously generated at the pulse cycle Tr as shown in FIG. This frequency memory output is converted into the same frequency as the missile and transmitted to the missile as in the first embodiment. Therefore, a continuous disturbance wave will appear very close to the target echo of the surface ship that the missile is tracking,
The range gate of the missile tracks and transfers from the target echo of the surface ship to the interfering wave as shown in (e) and (f).

By making the interference wave a continuous pulse, the following effects can be expected. One is that the jamming bullets are suspended by parachutes and are easily affected by the wind, so the deployment position moves, and even if the jamming pulse goes out of the range gate range before the tracking transition, The presence of the interference wave of, there is a possibility that this interference wave enters the range gate, the second is that it is possible to separate the radio wave of the missile and the radio wave of the jammer from the characteristics of the continuous pulse,
This means that the radio wave detection device of the surface ship will no longer erroneously recognize the radio wave of the jamming wave as the radio wave of the missile and issue an alarm. These are extremely effective in terms of operation.

Although the radio wave interference device in the surface ship has been described in the second embodiment, the present invention can be applied to a water or land mobile body other than the surface ship.

[0019]

Since the present invention is constructed as described above, it has the following effects.

By providing a calculator for calculating the conditions for allowing the radio wave of the radio interference bullet to enter the range of the missile range gate and a delay circuit for delaying the radio interference wave inside the radio interference bullet, From this stage, it is possible to generate a tracking transition of the missile, and it is possible to deal with a missile approaching at high speed in a short time, and it is possible to effectively secure the jamming duration.

Further, by providing a continuous pulse generating circuit for continuously generating an interfering wave inside the radio interference bullet, and transmitting the interfering wave at the optimum pulse period calculated by the above computer,
It has the same effect as above.

[Brief description of drawings]

FIG. 1 is a block diagram of a radio wave interference device showing a first embodiment of the present invention.

FIG. 2 is a block diagram of a radio interference bullet according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a radio interference bullet according to a second embodiment of the present invention.

FIG. 4 is a block diagram of a conventional radio interference device.

FIG. 5 is a block diagram of a conventional radio interference bullet.

FIG. 6 is an operation conceptual diagram of a conventional radio wave jamming device.

[Explanation of symbols]

1 fixed launcher, 2 radio jammers, 3 radio guided missiles, 4 radio detectors, 5 control boards, 6 remote controllers, 7 antennas, 8 surface ships, 9 receiving switches,
10 amplifier, 11 mixer, 12 band pass filter, 13 frequency memory, 14 trigger circuit, 15 transmission switch, 16 traveling wave tube, 17 directional coupler, 1
8 transmitting / receiving antenna, 19 remote control antenna, 20
Remote control receiver, 21 local oscillator, 22 computer, 23 delay circuit, 24 continuous pulse generation circuit

Claims (2)

[Claims] 1. A device for emitting interference from a radio-guided missile approaching a moving body by causing the mobile body to emit a radio-wave jamming bullet, the missile's arrival direction and distance, and the radio-wave jamming projectile's azimuth. A calculator that calculates the distance between the mobile object and the radio interference bullet seen from the missile based on the flight distance, and calculates the delay time for inserting the interference wave into the missile range gate from this distance difference. A frequency memory for storing missile transmission radio waves, the transmission means transmitting the delay time to the radio interference bullet, and the ejection means for ejecting the radio interference bullet;
A trigger circuit for providing a trigger signal to the frequency memory and provided between the trigger circuit and the frequency memory,
An electromagnetic interference device comprising a delay circuit for delaying and outputting the trigger signal according to the delay time calculated by the computer. 2. A device that emits a radio wave interference bullet from the mobile body to interfere with a radio-guided missile approaching the mobile body, in which the missile is coming and going, and the radio wave interference is being emitted. From the information on the flight distance, the distance between the moving body and the radio interference bullet seen from the missile is calculated, and the calculator that calculates the pulse period for inserting the interference wave into the missile range gate from this distance difference, and this calculator A frequency memory for storing missile transmission radio waves inside the radio interference bullet, and a transmission means for transmitting the pulse cycle to the radio interference bullet, and an ejection means for ejecting the radio interference bullet. A trigger circuit that gives a trigger signal and a continuous pulse generation time that is provided between the trigger circuit and the frequency memory and that continuously outputs the trigger signal at the pulse cycle. A radio wave jamming device characterized by having a path.