JPH0523992Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a flying object guiding device that guides a flying object using radio waves.

[Technical background of the invention and its problems]

The guidance system for ground-based flying vehicles that fly long distances almost parallel to the ground surface must search below the aircraft when searching for a target, and must keep its field of vision in front of the aircraft when tracking a target.

However, with a normal gyroscope mount type guidance device, the swing angle of the guidance section cannot be set large, and with a phased array antenna where the antenna is fixed to the aircraft, the swing angle can only be around ±40 degrees. I can't. Therefore, with a normal seeker-type guidance device, it is very difficult to secure an upward field of view when searching for a flying object flying almost parallel to the ground surface.

[Purpose of invention]

The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a flying object guidance device that can easily search in a direction perpendicular to the aircraft axis when searching for a target.

[Summary of the idea]

The flying object guidance device according to the present invention places a polarizer in front of a gyroscope-mounted antenna,
The radio waves emitted from the antenna are divided into those that are reflected by the polarizer and those that travel straight depending on the polarization plane, and when searching for a target, the radio waves of the reflected polarization plane are used to search in a direction perpendicular to the aircraft axis. It was designed to do so.

[Example of idea]

An embodiment of the flying object guiding device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram illustrating an embodiment of a flying object guiding device according to the present invention.

The antenna 11 is mounted on a gyroscope in the guidance section, and emits a transmitted pulse from a transceiver 12 for searching or tracking a target, and captures reflected pulses. The reflected pulse is received by the transceiver 12 and guided to the signal processing circuit 13. The signal processing circuit 13 is
When a target is detected, it outputs a signal to control the polarizer and a signal to control the aircraft, which will be described later.

The antenna 11 is configured as shown in FIG. 2, for example. That is, the antenna 11 has a primary radiator 21,
It is composed of a secondary mirror 22 and a polarizer 23.
The primary radiator 21 includes, for example, two radiators as shown in FIG.
It is composed of two dipole antennas 211 and 212, and the dipole antennas 211 and 212 are orthogonal to each other. The primary radiator 21 may be of this dipole type, a waveguide type, or another type of antenna as long as the plane of polarization is constant.
The polarizer 23 is made of, for example, a blind-shaped metal with a gap in one direction, and reflects radio waves with a polarization plane parallel to the blind from among the radio waves from the secondary mirror 22, and reflects radio waves with a polarization plane perpendicular to this radio wave. Go straight ahead. This polarizer 23 is rotationally controlled about a shaft 24 by an output signal from a polarizer controller 14 .

With the device configured as shown in Figures 1 and 2, when searching for a target for a flying object, the radio waves first cover the direction perpendicular to the aircraft axis (below the aircraft), as shown in Figure 3.31. The orientation of polarizer 23 is controlled. That is, when searching for a target, the polarizer 23 is used to conduct the search using radio waves with polarized planes reflected by the polarizer 23.

The gyro of the guidance part mounted on the gyro is
Since the polarizer 23 is locked after launching the projectile, the polarizer 23 may be fixed at a fixed angle.
It is preferable that the rotation be controlled so as to be able to respond to changes in the flight path. When the target enters the field of view of the guidance section, the aircraft is rotated by the target detection signal. In that case, the polarizer 23 is also rotated and its direction is controlled so that the target can be captured reliably. The rotation of the aircraft body may be performed in proportion to the rotation of the polarizer. Even if the polarizer 23 stops rotating, the signal processing circuit 1
The output signal No. 3 causes the aircraft to rotate until the target is locked on the tracking antenna. An antenna 11 can be used as a tracking antenna. After the tracking antenna locks on the target, the
As shown in 2, the target 33 is placed in the field of view in front of the flying object and is tracked using, for example, proportional navigation.

Note that during a search, the reflected energy from the ground surface is large, so loss due to the plane of polarization is hardly a problem.

[Effect of idea]

As explained above, according to the flying object guidance device according to the present invention, it is possible to easily search in a direction perpendicular to the aircraft axis when searching for a target.

[Brief explanation of the drawing]

Fig. 1 is a block diagram illustrating an embodiment of the flying object guidance device according to the present invention, Fig. 2 is a block diagram explaining the antenna shown in Fig. 1, and Fig. 3 shows the search state and tracking of the flying object. It is a figure explaining a state. 11...Antenna, 12...Transmitter/receiver, 13...
Signal processing circuit, 14...Polarizer controller, 2
1...Primary radiator, 22...Secondary mirror, 23...Polarizer.

Claims (1)

[Scope of Utility Model Registration Claim] It is mounted on a flying object that flies over a long distance almost parallel to the ground surface by radio wave guidance, and generates transmitted radio waves to be transmitted to the outside for searching or tracking a target, and also generates reflected radio waves. a transmitting/receiving unit that receives radio waves; and a transmitting/receiving unit that emits the transmitted radio waves generated by the transmitting/receiving unit;
a phased array antenna that captures the reflected radio waves; and a radio wave that is provided in front of the phased array antenna, is controlled to rotate about a rotation axis, and is radiated from the phased array antenna;
a polarizer that reflects radio waves having a predetermined plane of polarization; the reflected radio waves received by the transmitter/receiver are guided; a target is detected from the reflected radio waves; and when searching for a target, one of the transmitted radio waves emitted from the phased array antenna is , the rotation angle of the polarizer is controlled so that the radio wave having a polarized wave plane reflected by the polarizer covers a direction substantially perpendicular to the aircraft axis, and further has a polarized wave plane reflected by the polarizer when tracking a target. a signal processing circuit that outputs a control signal for controlling the rotation angle of the polarizer so that radio waves are directed toward a target direction; and a polarizer control that controls the rotation of the polarizer based on the control signal output from the signal processing circuit. A flying object guiding device characterized by comprising: a.