JPH0875843A - Jamming radio wave directing device - Google Patents

Abstract

PURPOSE: To provide a jamming wave directing device capable of always directing jamming wave to a target even if the distance between an airplane and the target or the attitude angle of the airplane is varied. CONSTITUTION: When an airplane starts light, information on self-position, the attitude angle of the airplane, and a target position is send to a processor 11 from a controller 15. The processor 11 instructs a transmitter 12 to send a jamming electric wave and calculates the directing angle to the target of an electric wave directing device 14 based on the information on the self- position, the attitude angle of the airplane, and the target position sent from the controller 15 and outputs the calculated data to the electric wave directing device 14. The electric wave directing device 14 directs the jamming wave toward the target according to the angle information given by the processor 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jamming radio wave directing device for directing jamming radio waves output from a jamming radio wave generator mounted on an aircraft toward a target direction.

[0002]

2. Description of the Related Art An aircraft sometimes emits an interfering radio wave for the purpose of preventing it from being captured by a radar device installed on the ground. That is, as shown in FIG. 7, when the aircraft 1 flies toward a target 2 on the ground such as a radar device, a jamming radio wave generator mounted on the aircraft 1 generates a jamming radio wave and moves in a certain forward direction (horizontal direction). Emitting jamming radio waves. In FIG. 7, reference numeral 4 indicates the directional characteristic of the jammed radio wave.

[0003]

When the pointing direction of the interfering radio waves is fixed in the horizontal direction as in the prior art, the aircraft 1
Is sufficiently far from the target 2, the direction 3 in which the interference wave is desired to be directed substantially coincides with the main lobe 4a of the directivity characteristic 4 of the interference wave, and the interference wave in the direction of the target 2 is kept at a sufficient level. There is. However, when the aircraft 1 approaches the target 2, the side lobes 4b are only directed in the direction 3 in which the interference wave is desired to be directed, that is, in the direction of the target 2, and the level of the interference wave becomes very small.

Further, when the flight direction of the aircraft 1 is changed, the relative angle with respect to the target 2 is changed, and the power of the jamming radio wave in the direction of the target 2 is reduced. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a jamming radio wave directing device that can always direct a jamming radio wave toward a target even if the distance between the aircraft and the target or the aircraft attitude angle changes. To aim.

[0005]

A jamming radio wave directing device according to the present invention comprises: a jamming radio wave generator mounted on an aircraft; and a radio wave director for changing the pointing direction of a jamming radio wave generated by the jamming radio wave generator. A control means for controlling the pointing direction of the radio wave director so that the intensity of the jamming radio wave in the target direction is always maximized based on the information on the position, attitude angle and target position of the aircraft. Characterize.

[0006]

When the aircraft starts to fly, the aircraft control section gives the control means information about the self-position, the aircraft attitude angle, and the target position. The control means instructs the jamming radio wave transmitting device to transmit jamming radio waves when the aircraft has started flying, and the self-position given from the aircraft control unit,
Based on the information on the aircraft attitude angle and the target position, the pointing angle of the radio wave directing device with respect to the target is calculated and output to the radio wave directing device. The radio wave director directs the jamming radio wave in the target direction according to the angle information given from the control means. As a result,
Even if the distance between the aircraft and the target or the aircraft attitude angle changes, it is possible to always emit a high level of jamming radio waves to the target.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a state in which an interference radio wave directing device according to an embodiment of the present invention is mounted on an aircraft, and FIG. 2 is a block diagram showing a configuration of the interference radio wave directing device.

As shown in FIG. 1, an interference radio wave directing device including an interference radio wave generator is mounted on, for example, a head portion of an aircraft 1. This interference radio wave directing device includes a processor unit 11,
Transmitter 12 that outputs jamming radio wave 13, the above jamming radio wave 13
The radio wave directing device 14 is provided for changing the directivity direction. As the radio wave director 14, for example, an electronic scanning type phased array antenna is used. This phased array antenna has a plurality of radiating elements arranged in an array on a plane.
The direction of the radio wave is changed by controlling the phase of the radio wave emitted from each radiating element. The radio wave directing device 14 is not limited to the electronic scanning type, but may be a mechanical type that mechanically rotates the antenna to change the direction of the radio wave.

As shown in FIG. 2, the processor unit 11 is provided with information on the self-position, attitude angle, and target position of the aircraft 1 from the aircraft control unit 15. Processor unit 11
When the aircraft 1 starts to fly, it gives a transmitter 12 a command to transmit a radio wave, and calculates the target direction based on the information of the self-position, attitude angle, and target position of the aircraft given from the aircraft control unit 15. To obtain the radio wave pointing command,
The pointing command is given to the radio wave directing device 14. The radio wave director 14 directs the interference radio wave 13 output from the transmitter 12 in a target direction based on a radio wave directing command from the processor unit 11.

Next, the operation of the above embodiment will be described. When the aircraft 1 starts to fly, as shown in FIG. 3, the aircraft control unit 15 tells the processor unit 11 the aircraft space coordinates XA, HA, ZA indicating the position of the aircraft, and the aircraft attitude angles φA, ψ.
A, θA, target position (target space coordinate) XT, HT, ZT
give. FIG. 4 shows the positional relationship between the aircraft 1 and the target 2 in the spatial coordinate systems X, H, Z (origin 0 is arbitrary).

When the aircraft 1 starts flying, the processor unit 11 commands the transmitter 12 to transmit an interference radio wave, and at the same time, the aircraft space coordinates XA, HA, ZA, and the aircraft attitude angle given by the aircraft control unit 15. φA, ψA, θ
A, target space coordinates XT, HT, ZT are subjected to coordinate conversion (conversion into relative coordinates and body coordinates) to calculate angles ψH (yaw) and θH (pitch) of the radio wave directing device 14. FIG. 5 shows the body axis coordinate system (XB, YB, Z
B: The relationship between the radio wave director angles ψH (yaw) and θH (pitch) with respect to the target at the center of gravity of the aircraft as origin 0) is shown. The radio wave director angle ψH (yaw)
Indicates the horizontal angle between the XB axis and the target along the center axis of the airframe, and the radio wave director angle θH (pitch) indicates the vertical angle between the XB axis and the target.

The processor unit 11 outputs the calculated radio wave director angles ψH (yaw) and θH (pitch) to the radio wave director 14. The radio wave director 14 includes the processor unit 11.
The interfering radio waves are directed in the target direction in accordance with the angles ψH (yaw) and θH (pitch) given by. As a result,
Interference radio waves output from the transmitter 12 are
Is emitted toward the target direction.

By directing the radio waves radiated from the radio wave directing device 14 in the target direction in accordance with the instruction from the processor unit 11 as described above, no matter how the relative relationship between the aircraft 1 and the target changes, it is always possible. It can emit a high level of jamming radio waves to the target.

That is, as shown in FIG. 6, when the aircraft 1 flies toward a target 2 on the ground such as a radar device, not only when the aircraft 1 is far from the target 2 but also when the aircraft 1 is the target 2. When the aircraft 1 changes its flight direction on the way and the relative angle to the target 2 changes, the main lobe 4a of the radio wave director 14 is moved to the target 2 by an instruction from the processor unit 11. It is possible to keep the electric power of the jamming radio waves in the two target directions at the maximum level by directing the electric power in the two directions. As a result, the function of the jamming radio wave generating device can be maximized, the function of the target radar device can be reduced, and the confidentiality of the aircraft 1 can be enhanced.

[0015]

As described above in detail, according to the present invention, the angle of the radio wave director with respect to the target is calculated from the self-position, attitude angle, and target position of the aircraft to control the pointing direction of the radio wave director. Therefore, even if the distance between the aircraft and the target or the aircraft attitude angle changes, the jamming radio waves can be always directed toward the target, and the jamming radio waves of a high level can always be radiated to the target.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which an interference radio wave directing device according to an embodiment of the present invention is mounted on an aircraft.

FIG. 2 is a block diagram showing a configuration of a jammer radio wave directing device in the embodiment.

FIG. 3 is an operation explanatory diagram of a processor unit in the embodiment.

FIG. 4 is a diagram showing a positional relationship between an aircraft and a target in a spatial coordinate system.

FIG. 5 is a diagram for explaining a radio wave director angle in a body axis coordinate system.

FIG. 6 is a diagram for explaining a pointing operation of an interfering radio wave.

FIG. 7 is a diagram for explaining a conventional jamming radio wave radiation operation.

[Explanation of symbols]

 1 Aircraft 2 Target 3 Direction to direct radio wave 4 Directional characteristics 4a Main lobe 4b Side lobe 11 Processor section 12 Transmitter 13 Interference radio wave 14 Radio wave director 15 Aircraft control section

Claims (1)

[Claims] Claims: 1. A jamming radio wave generator mounted on an aircraft, a radio wave director for changing the pointing direction of a jamming radio wave generated by the jamming radio wave generator, and information on the position, attitude angle and target position of the aircraft. And a control means for controlling the pointing direction of the radio wave directing device so that the strength of the jamming radio wave with respect to the target direction is always maximized.