JP2001208500A - Airframe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a target observing means which can accurately observe a target by simultaneously transmitting a radio wave for irradiating a target and receiving reflected waves from the target for a guiding device provided on an airframe. SOLUTION: The guiding device is provided with such a means that has an exclusive transmission antenna, a transmission antenna switching section, a transmission antenna switching discriminating section, and a transmission power attenuator. The device simultaneously performs the transmission of a radio wave for irradiating the target and the reception of reflected waves from the target, by transmitting the radio wave from the exclusive transmission antenna and receiving the reflected waves from the target by means of a transmission-reception antenna.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-to-air missile system comprising a fire control system, a radar system, a launch system, a flying object, and the like located in the air, at sea, or on the ground. The present invention relates to an improvement in a flying object, and particularly to a flying object having a characteristic in its guiding device.

[0002]

2. Description of the Related Art FIG. 8 shows the relative relationship between a target and a projectile fired at the target. FIG. 8 is a schematic diagram showing the process from the launch of the projectile to the meeting with the target. is there. In the figure, reference numerals 1a, 1b, and 1c denote platforms for launching the projectile 2, each of which is constituted by a fire control device, a radar device, a launch device, and the like. still,
1a is an aircraft that launches a flying object from the air;
b is a ship that launches a flying object from the sea, and 1c is a launching device that launches a flying object from the ground. 3 above
The projectile 2 fired from one of the two platforms is guided by the guidance device 4 mounted on itself to observe the relative relationship between the target 3 and the projectile 2,
Invite to meet with and reach the meeting. Here, the flying object 2 has many components. Here, the guidance device according to the features of the present invention will be mainly described.

[0003] In order to observe the relative relationship between the target 3 and the flying object 2, the guiding device 4 provided in the flying object 2 shown in FIG.
The transmitting / receiving antenna having the directivity provided in (1) is directed in the direction of the target 3, and the pulse-shaped radio wave 5 is transmitted to the target 3. The reflected wave 6 of the transmitted pulse-shaped radio wave 5 is received via a transmission / reception antenna provided in the guidance device 4, and the received signal is processed to determine the relative relationship between the target 3 and the flying object 2. Observe.

[0004] In FIG. 8, the guide device 4 provided in the conventional flying object is configured to transmit and receive a pulse-shaped radio wave 5 for irradiating the target 3 by alternately switching between transmission and reception of the radio wave using a transmission / reception antenna. The reflected wave 6 from the target 3 is received. In addition, the timing at which the pulse of the reflected wave 6 from the target 3 returns to the guiding device 4 and the timing at which the guiding device 4 transmits the pulse-shaped radio wave 5 overlap with each other, such that the target reflected wave cannot be received (hereinafter, referred to as an event). The pulse width of the pulse-shaped radio wave 5 is selected and transmitted based on the relative distance between the target 3 and the flying object 4 so that this event is not caused by eclipse.

FIG. 9 is a block diagram of a conventional guidance device provided in a flying object. The conventional guidance device shown in FIG. 9 includes an antenna unit U1, a receiving unit U2, a signal processing unit U3, an exciter U4, and The antenna unit U1 includes a transmitting / receiving antenna E1 and a beam direction controller E
2 and a circulator E3. The receiving unit U2 includes a receiving gate switch E4 and a receiver E5. The signal processing unit U3 includes an A / D conversion unit E6, a target signal processing unit E7, and a transmission / reception unit. The exciter U4 includes a timing control unit E8, and the VCO (Voltage C)
controlled Oscillator) E9,
The transmitting unit U5 includes an oscillator E10 and a pulse modulation circuit E11, and the transmitting unit U5 includes a transmitter E12.

In such a configuration, the antenna unit U1
Performs transmission of a pulse-shaped radio wave 5 for irradiating the target 3 with the transmission / reception antenna E1 and reception of the radio wave 6 reflected from the target 3. At this time, the transmitting / receiving antenna E1
The beam direction controller E2 for directing the beam direction of the target 3 to the target 3 performs the control of the angle of the transmission / reception antenna E1 or the phase control of the radio wave based on the angle rate signal D7 output from the signal processing unit U3. The circulator E3 sends the transmission wave D15 output from the transmission unit U5 to the transmission / reception antenna E1, and sends the reception wave D1 output from the transmission / reception antenna E1 to the reception unit U2.

Next, the operation of the receiving section U2 will be described.
In the receiving section U2, the receiving gate switch E4 controls the reception output from the antenna section U1 based on the receiving gate control signal D6 output from the signal processing section U3 so that the receiver E5 does not saturate due to the wraparound of the transmission wave. Wave D1
Is shut off when the transmission pulse is being output. The receiver E5 receives the reception wave D output from the reception gate switch E4.
2 is amplified, the received wave D2 is converted into a video band based on the local signal D12 output from the exciter U4, and the video signal D13 is output to the signal processing unit U3.

Next, the operation of the signal processing unit U3 will be described. In the signal processing unit U3, the A / D conversion unit E6 digitally converts the video signal D13 output from the reception unit U2, and outputs the video signal D13 to the target signal processing unit E7. Target signal processing unit E
7 is a digital signal D4 output from the A / D converter E6
Goal 3 based on the self-propelled body by processing
Is calculated, and the result is output as a guidance signal D8. The target signal processing unit E7 outputs a signal D9 for controlling the transmission frequency, an angle rate signal D7 for continuing the angle tracking of the target 3, and a VCO control signal D11 for continuing the distance and speed tracking. The transmission / reception timing control unit E8 selects a transmission pulse width based on the relative distance information D5 between the self-propelled vehicle and the target 3 output from the target signal processing unit E7 so that eclipse does not occur. The result is output as the transmission pulse control signal D10. In order to prevent the receiver E5 from being saturated, when the transmission pulse of the pulse-modulated transmission signal D14 is being output, the reception signal is received by the reception gate switch E4 so as to cut off the reception wave D1 output from the antenna unit U1. It outputs a gate control signal D6.

Next, the operation of the exciter U4 will be described. In the exciter U4, the VCOE 9 is a signal processing unit U.
The local signal D12 is output to the receiving unit U2 based on the VCO control signal D11 output from the control unit 3. Oscillator E10
Is the transmission frequency control signal D output from the signal processing unit U3.
9 to output a CW transmission signal D13. The pulse modulation circuit E11 pulse-modulates the transmission signal D13 based on the transmission pulse control signal output from the signal processing unit U3, and outputs the output to the transmission unit U5.

Next, the operation of the transmitting unit U5 will be described.
In the transmitting section U5, the transmitter E12 amplifies the pulse-modulated transmission signal D14 output from the exciter U4 and outputs the amplified signal to the antenna section U1.

[0011]

FIG. 10 shows a pulse form transmitted from the guiding apparatus 4 when the relative relationship between the target 3 and the flying object 2 shown in FIG. And the pulse-like radio wave reflected by the target 3 and received by the guidance device 4. The relative relationship at the point A in FIG. 8 corresponds to FIG.
The relative relationship at the point b in FIG. 8 corresponds to FIG.

In the case where the relative distance between the target and the flying object is large as at the time point a in FIG. 8, the guiding device 4 has a pulse-like shape such that no eclipse occurs, as shown in FIG. Since the pulse width of the radio wave 5 can be selected, the transmission and reception of the radio wave is alternately switched at the timing 8 using the transmission / reception antenna 7, and the transmission of the pulse-shaped radio wave 5 for irradiating the target 3 and the transmission from the target 3 are performed. The reflected wave 6 can be received.

When the relative distance between the target and the flying object is just before the meeting and the relative distance becomes very small, as at the time point b in FIG. 8, the guiding device 4 has a limit in the variable transmission pulse width. When the pulse width cannot be set short, a pulse width that does not cause eclipse cannot be selected. As a result, as shown in FIG. 10B, when an event occurs such that the reflected wave returns while the guiding device 4 is transmitting the radio wave, the reflected wave cannot be received and the target 3 cannot be observed. In this state, the guidance device 4
Performs an extrapolation calculation based on information before the target 3 cannot be observed due to the eclipse, predicts a relative relationship between the target 3 and the flying object 2, and guides the flying object.

For this reason, if the target 3 performs a maneuver such as a turn immediately before meeting with the flying object 2, an error between the target position predicted by the guidance device 4 and the actual target position increases, thereby deteriorating the guidance accuracy. This leads to an increase in miss distance, and cannot effectively cope with aircraft expected to be highly mobile in the future.

When the target 3 is a ballistic missile,
It is necessary for the flying object to hit directly to negate the effect, and there is also a problem that the target cannot be hit directly due to deterioration of the guidance accuracy due to the inability to observe the target immediately before the meeting.

In order to solve the above-mentioned problems, the present invention enables simultaneous transmission of a pulsed radio wave for irradiating a target and reception of a reflected wave from the target so that the relative distance immediately before the meeting with the target is reduced. It proposes a flying object equipped with a guidance device that can accurately observe a target even when it becomes smaller.

[0017]

The guiding device according to the first invention forms a fan beam covering the range of the beam directing direction of the transmitting / receiving antenna in addition to the transmitting / receiving antenna of the conventional guiding device. It is provided with a transmission-only antenna, transmits a radio wave for irradiating the transmission-only antenna target, and can receive a reflected wave from the target with the transmission / reception antenna, whereby the target The transmission of the radio wave for irradiating and the reception of the reflected wave from the target can be simultaneously performed using two antennas.

Further, the guidance device according to the second aspect of the present invention enables the radio wave transmitting means for irradiating the target to be switched to either a transmitting / receiving antenna or a transmitting antenna. Thereby, the transmission means of the radio wave for irradiating the target can be switched according to the observation state of the target.

Further, the guidance device according to the third aspect of the present invention provides a transmission of a radio wave for irradiating a target using a transmission / reception antenna and a reflected wave from the target based on relative distance information between the target and the flying object. If the reflected wave from the target is eclipse, it is determined whether the reflected wave from the target is eclipse.If the reflected wave from the target is eclipse, transmission of radio waves for irradiating the target and reception of the reflected wave from the target , The transmission means of the radio wave for irradiating the target is switched from the transmission / reception antenna to the transmission-only antenna, so that control can be performed such that the reflected wave from the target is received by the transmission / reception antenna.

Further, in the guidance device according to the fourth invention, when the reception power of the reflected wave from the target becomes equal to or more than the set value, the transmission of the radio wave for irradiating the target and the reception of the reflected wave from the target are simultaneously performed. As a result, the transmission means of the radio wave for irradiating the target is switched from the transmission / reception antenna to the transmission-only antenna, and control such that the reflection wave from the target is received by the transmission / reception antenna can be performed.

Further, the guidance device according to the fifth aspect of the present invention transmits a radio wave for irradiating the target from the transmission-only antenna, and irradiates the target using the transmission / reception antenna as a reception-only antenna for the reflected wave from the target. When performing simultaneous radio wave transmission and reception of the reflected wave from the target, the transmission power can be reduced so that the receiver does not saturate with the radio wave transmitted by itself.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a guiding device which is a characteristic of a flying object according to the present invention. The guiding device when the relative relationship between the target 3 and the flying object 2 shown in FIG. 4
FIG. 8 shows the relationship between the pulse-shaped radio wave transmitted from the target 3 and the pulse-shaped radio wave reflected by the target 3 and received by the guidance device 4, and the relative relationship at the point a in FIG.
8A corresponds to FIG. 1B, and the relative relationship at the time point b in FIG. 8 corresponds to FIG.

When the relative distance between the target and the flying object is large as at the time point a in FIG. 8, the guiding device 4 sets the directivity transmitting / receiving antenna 7 to the target 3 as shown in FIG. The transmission of the pulse-shaped radio wave 5 for irradiating the target 3 in the direction of and the reception of the radio wave 6 reflected from the target 3 are performed while selecting a pulse width that does not cause eclipse. , At the timing 8.

In the case where the target and the flying object are just before the meeting and the relative distance becomes very small, as shown at point b in FIG. 8, the guiding device 4 irradiates the target 3 as shown in FIG. The transmission means of the pulse-shaped radio wave 5 is switched to the transmission-only antenna 9, and the reflected wave 6 from the target 3 is received by the transmission / reception antenna 7 directed to the target 3, so that the pulse-shaped radiation for irradiating the target 3 is obtained. The transmission of the radio wave 5 and the reception of the reflected wave 6 from the target are performed simultaneously.

Embodiment 1 FIG. 2 is a schematic diagram showing the first embodiment of the present invention. In the figure, reference numeral 4 denotes a guiding device, which includes a transmitting / receiving antenna 7 and a transmitting antenna 9. The transmitting / receiving antenna 7 included in the guiding device 4 shown in the figure is a radio wave for irradiating the target 3 by directing the antenna beam 10 in the direction of the target 3 by controlling the angle or phase of the antenna surface of the transmitting / receiving antenna 7. And the reflected wave from the target 3 is received.
In the figure, a transmission-only antenna 9 included in the guidance device 4 is shown.
Are provided around the transmitting / receiving antenna 7 and have an antenna coverage area 12 covering the beam directable range 11 of the transmitting / receiving antenna 7.
When transmitting a radio wave for irradiating the target 3 from the, the radio wave is radiated to the entire surface of the beam directable range 10 of the transmitting / receiving antenna 7. Here, when transmitting a radio wave for irradiating the target 3 and receiving a reflected wave from the target 3 simultaneously, a radio wave is transmitted from the transmission-only antenna 9 and the transmission / reception antenna 7 is transmitted.
To receive.

Embodiment 2 FIG. FIG. 3 is a block diagram showing Embodiment 2 of the guidance device of the present invention. In the figure, a transmission antenna switch E13 receives a transmission antenna switching control signal D17 as an input and transmits a transmission wave D15 amplified by a transmitter E12. By switching to the circulator E3 or the transmission antenna E14 connected to the transmission / reception antenna E1, the transmission means of the radio wave for irradiating the target 3 is changed to the transmission / reception antenna E1 or the transmission antenna E14.

Embodiment 3 FIG. 4 is a block diagram showing Embodiment 3 of the guidance device according to the present invention. In the figure, an eclipse determination unit E15 in a transmission antenna switching determination unit U7 includes information on a transmission pulse width that can be selected by a transmission / reception timing control unit E8. Means for calculating the amount of eclipse of the reflected wave 6 from the target 3 by using the relative distance information D5 output from the target signal processing unit E7 as an input, and transmitting the pulsed radio wave 5 for irradiating the target 3 Is determined to be either the transmission / reception antenna E1 or the transmission-only antenna E14, and the transmission antenna switching control signal D17 is output to the transmission antenna switch E13.

Here, when the relative distance between the target 3 and the flying object is large and the transmission / reception timing control unit E8 can set a transmission pulse width that does not cause eclipse (the reflected wave 6 from the target 3). When the eclipse amount is small), the eclipse determination unit E15 in the transmission antenna switching determination unit U7 selects the transmission / reception antenna E1 as a transmission unit of the radio wave 5 for irradiating the target 3, and transmits the radio wave 5 to the transmission antenna switch E13. The transmission antenna switching control signal D17 is output so that the transmission wave D15 output from the device E12 is output to the circulator E3 connected to the transmission / reception antenna E1. In addition, the transmission antenna switching determination unit U7 outputs a result D18 that the transmission / reception antenna E1 is selected as the transmission unit of the radio wave 5 for irradiating the target 3, to the transmission / reception timing control unit E8 of the signal processing unit U3. Upon receiving the result D18, the transmission / reception timing control unit E8 closes the reception gate while the pulsed radio wave 5 for irradiating the target 3 is being output, and the transmission wave D15 is input to the receiver E5. So that there is nothing
Also, while the pulse-shaped radio wave 5 for irradiating the target 3 is not being output, the reception gate is open and the reception wave D
A reception gate control signal D6 is output to the reception gate switch E4 so that 1 is input to the receiver E5. In this manner, radio wave transmission for irradiating the target 3 and reception of a reflected wave from the target 3 are performed alternately.

When the relative distance between the target 3 and the flying object becomes short, such as immediately before the meeting, and the transmission / reception timing control unit E8 cannot set a transmission pulse width that does not cause eclipse (a reflected wave from the target 3). 6, when the eclipse amount is large), the eclipse determination unit E15 in the transmission antenna switching determination unit U7 selects the transmission-only antenna E14 as a transmission unit of the radio wave 5 for irradiating the target 3, and sends the signal to the transmission antenna switch E13. The transmission antenna switching control signal D17 is output so that the transmission wave D15 output from the transmitter E12 is output to the transmission antenna E14. In addition, the eclipse determination unit E15 outputs a result D18 that the transmission means of the radio wave 5 for irradiating the target 3 has selected the transmission-only antenna E14 to the transmission / reception timing control unit E8 in the signal processing unit U3. The transmission / reception timing control unit E8 receiving the result D18 outputs the reception gate control signal D6 to the reception gate switch E4 so that the reception gate is always open. In this way, the radio wave transmission for irradiating the target 3 and the reception of the reflected wave from the target 3 are performed simultaneously.

Embodiment 4 FIG. 5 is a block diagram showing Embodiment 4 of the guidance device of the present invention. In FIG. 5, a reception power determination unit E1 in a transmission antenna switching determination unit U7 is shown.
6 is a transmission / reception antenna E1 and a transmission-only antenna E
It has 14 antenna pattern information and has a target signal processing unit E
7, the received power of the reflected wave 6 from the target 3 output from
Inputting a disturbance noise level such as clutter and data D19 indicating the direction in which the target 3 exists based on the guidance device, the transmission means of the radio wave 5 for irradiating the target 3 is a transmission / reception antenna E1 or a transmission-only antenna. A determination is made to select one of E14. Further, in the figure, the comprehensive determination unit E17 in the transmission antenna switching determination unit U7 determines the target 3 based on the determination result D18 of the eclipse determination unit E15 and the determination result D20 of the transmission power determination unit E16 described in the third embodiment. A comprehensive determination is made as to which of the transmission / reception antenna E1 and the transmission-only antenna E14 is to be used as the transmission means of radio waves for irradiation, and the result is output to the transmission antenna switch E13 as a transmission antenna switching control signal D17.

Here, when the flying object of the present invention is fired from the launching platform and the relative distance between the target 3 and the flying object is large, such as when the guidance device starts observing the target 3, The target 3 is irradiated to secure a reception level (intensity of the reflected wave 6 from the target 3 received by the antenna unit U1) required for detecting the signal of the reflected wave 6 from the target 3 in the target signal processing unit E7. It is necessary to make the intensity of the radio wave 5 for the transmission as large as possible.
For this reason, the reception power determination unit E16 in the transmission antenna switching determination unit U7 selects the transmission / reception antenna E1 having a directional antenna pattern as the transmission unit of the radio wave 5 for irradiating the target 3, and determines the result. The signal is output to the overall determination unit E17 in the transmission antenna switching determination unit U7.

When the observation of the target 3 is started and the continuation of the observation (hereinafter, the continuation of the target observation is referred to as tracking the target), the transmission antenna switching determination unit U7
The reception power determination unit E16 includes the gain of the transmission-only antenna E14 in the direction in which the target 3 is present and the transmission / reception ratio in the direction in which the target 3 is present, based on the information on the direction in which the target 3 is present, which is output from the target signal processing unit E7. A difference in antenna gain when the antenna E1 is directed to the target 3 is calculated. After that, the reception power determination unit E16 illuminates the target 3 with the transmission / reception antenna E1 output from the target signal processing unit E7 and the target 3 when the reflected wave is received. Based on the received power of the reflected wave 6 from the antenna and information on the noise level of disturbance such as clutter.
In step 4, the target 3 is irradiated with radio waves and the S / N when the reflected wave is received is predicted and calculated.

The relative distance between the target 3 and the flying object is reduced, and the target 3 is irradiated with the transmission-only antenna E14 obtained as a result of the prediction calculation by the reception power determination unit E16 in the transmission antenna switching determination unit U7. In the target signal processing unit E7, the S / N when receiving the reflected wave is
If the level exceeds the level required for detecting and tracking the reflected wave from the antenna 3, the reception power determination unit E16 in the transmission antenna switching determination unit U7 sets the transmission antenna E14 as a radio wave transmission unit for irradiating the target 3. Is selected, and the result is used as the overall judgment unit E1 in the transmission antenna switching judgment unit U7.
7 is output.

Transmission antenna switching determining unit U shown in FIG.
7 based on the determination result D18 output from the eclipse determination unit E15 and the determination result D20 of the received power determination unit E16 described in the third embodiment, and make a determination as shown in FIG. If the result indicates that the transmission / reception antenna E1 is selected as the radio wave transmission means for irradiating the target 3, the transmission wave D output from the transmitter E12 is transmitted.
The transmission antenna switching control signal D17 is output to the transmission antenna switching device E13 so that the transmission antenna switching control signal D17 is output to the circulator E3 connected to the transmission / reception antenna E1. Further, at this time, the comprehensive judgment unit E17 outputs a result D21 that the transmission / reception antenna E1 is selected as a radio wave transmission unit for irradiating the target 3, to the transmission / reception timing control unit E8 of the signal processing unit U3. Upon receiving the result D21, the transmission / reception timing control unit E8 closes the reception gate while the pulsed radio wave 5 for irradiating the target 3 is being output, and the transmission wave D15 is input to the receiver E5. The reception gate is opened and the reception gate switch E4 is turned on so that the reception wave D1 is input to the receiver E5 while the pulsed radio wave 5 for irradiating the target 3 is not being output. Receive gate control signal D6
Is output. In this manner, radio wave transmission for irradiating the target 3 and reception of a reflected wave from the target 3 are performed alternately.

If the result of the judgment made by the overall judgment section E17 is that the transmission-only antenna E14 is to be selected as the radio wave transmission means for irradiating the target 3, the transmission wave D15 output from the transmitter E12 is transmitted to the transmission-only antenna. A transmission antenna switching control signal D17 is output from the overall determination unit E17 to the transmission antenna switch E13 so as to be output to the E14 side. In addition, the comprehensive determination unit E17 outputs a result D21 that the transmission means of the radio wave 5 for irradiating the target 3 has selected the transmission-only antenna E14 to the transmission / reception timing control unit E8 in the signal processing unit U3. Upon receiving the result D21, the transmission / reception timing control unit E8 outputs the reception gate control signal D6 to the reception gate switch E4 so that the reception gate is always open. In this way, the radio wave transmission for irradiating the target 3 and the reception of the reflected wave from the target 3 are performed simultaneously.

Embodiment 5 FIG. 7 is a block diagram showing Embodiment 5 of the guidance device of the present invention. In the drawing, a transmission power attenuator E18 is provided between a transmission antenna switch E13 and a transmission antenna E14, and a target 3 and a flying object are provided. And the transmission of the radio wave 5 for irradiating the target 3 using the transmission-only antenna E14 and the reception of the reflected wave 6 from the target 3 using the transmission / reception antenna E1 are performed simultaneously. , Transmission-only antenna E14
Is transmitted by the transmission / reception antenna E1 via the transmission antenna switch E13 so that the radio wave 5 transmitted from the transmission / reception antenna E1 is received by the transmission / reception antenna E1 and the receiver E5 is not saturated. Wave D
22 is attenuated.

[0037]

According to the first aspect of the present invention, in addition to the transmission / reception antenna that alternately performs radio wave transmission for irradiating a target to one guide device and reception of a reflected wave from the target, reception of the transmission / reception antenna By providing a transmission-only antenna that forms a fan beam that covers the range of possible directions,
The transmission of radio waves for irradiating the target and the reception of reflected waves from the target can be performed simultaneously using two antennas, and when the relative distance between the target and the flying object becomes very small, Also, the reflected wave can be received without eclipse, and the observation of the target can be continued.

According to the second aspect of the present invention, the transmitting means for transmitting the radio wave for irradiating the target with the radio wave is output from the transmitter to the transmitting / receiving antenna or the transmitting-only antenna by the transmitting antenna switch. It is possible to switch the transmission means of the radio wave for irradiating the target according to the observation state of the target by enabling the output direction of the transmission wave to be switched.

According to the third aspect of the present invention, the eclipse determination unit is provided in the guidance device, and the transmission / reception antenna alternately performs radio wave transmission for irradiating a target and reception of a reflected wave from the target. The eclipse determination unit determines whether or not the reflected wave from the target is eclipse, and if the reflected wave from the target is eclipse, transmits a radio wave transmitting means for irradiating the target. By switching to the dedicated antenna, it is possible to perform control such that transmission of radio waves for irradiating the target and reception of the reflected wave from the target are simultaneously performed by using the transmission / reception antenna to receive the reflected wave from the target.

According to the fourth aspect of the present invention, the reception power determination unit of the guidance device is provided, and the reception power determination unit irradiates the target with the transmission-only antenna and receives the reflected wave. Before the reflected wave from the target reaches the Eclipse relative distance, the radio wave transmission means for irradiating the target is switched to a transmission-only antenna, and the reception of the reflected wave from the target is used for both transmission and reception. Using an antenna,
It is possible to perform control such that radio wave transmission for irradiating the target and reception of a reflected wave from the target are performed simultaneously.

According to the fifth aspect of the present invention, the transmission power attenuator of the guidance device is provided to reduce the transmission power, thereby transmitting a radio wave for irradiating the target from the transmission-only antenna,
Even if the transmission / reception antenna is used as a dedicated antenna for receiving the reflected wave from the target, and the radio wave for irradiating the target and the reception of the reflected wave from the target are simultaneously performed, the receiver is saturated by the radio wave transmitted by itself. Without this, it is possible to continue to observe the target.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a relationship between a pulsed radio wave transmitted from a guidance device included in a flying object according to the present invention and a pulsed radio wave reflected by a target.

FIG. 2 is a diagram showing Embodiment 1 of the guidance device provided in the flying object according to the present invention.

FIG. 3 is a view showing Embodiment 2 of a guidance device provided in a flying object according to the present invention.

FIG. 4 is a diagram showing Embodiment 3 of a guidance device provided in a flying object according to the present invention.

FIG. 5 is a view showing Embodiment 4 of a guidance device provided in a flying object according to the present invention.

FIG. 6 is a diagram illustrating determination conditions of a comprehensive determination unit according to a fourth embodiment of the guidance device included in the flying object according to the present invention.

FIG. 7 is a view showing Embodiment 5 of a guidance device provided in a flying object according to the present invention.

FIG. 8 is a diagram showing a relative relationship between a target and a flying object fired at the target.

FIG. 9 is a view showing a guidance device provided in a conventional flying object.

FIG. 10 is a schematic diagram showing a relationship between a pulsed radio wave transmitted from a guidance device provided in a conventional flying object and a pulsed radio wave reflected by a target.

[Explanation of symbols]

1a Aircraft that launches projectiles from the air 1b Ships that launch projectiles from the sea Device, pulsed radio wave transmitted by the guidance device, 6 reflected wave from target, 7
Transmit / receive antenna, 8 transmit / receive timing, 9 transmit / receive antenna, 10 transmit / receive antenna antenna beam, 11 transmit / receive antenna 7 beam directivity range, 12 transmit-only antenna antenna coverage, U1
Antenna unit, U2 receiving unit, U3 signal processing unit, U4
Exciter, U5 transmitting unit, U6 transmitting antenna switching unit, U7 transmitting antenna switching determining unit, E1 transmitting / receiving antenna, E2 beam direction controller, E3 circulator, E4 receiving gate switch, E5 receiver, E6 A / D converter, E7 Target signal processing unit, E8
Transmission / reception timing control unit, E9 VCO, E10 oscillator, E11 pulse modulation circuit, E12 transmitter, E1
3 transmission antenna switcher, E14 transmission-only antenna, E15 eclipse determination unit, E16 reception power determination unit, E17 general determination unit, E18 transmission power attenuator, D
1 Received signal of reflected wave from target, D2 Receive gate S
W, received signal converted to D3 video band, D4 received signal converted to digital, D5
Information on the relative distance between the target and the flying object, D6 reception gate control signal, D7 angle rate signal, D8 guidance signal, D9 transmission frequency control signal, D10 transmission pulse control signal, D11 VCO control signal, D12 local signal, D13 Transmission signal, D14 pulse modulated transmission signal, D15 transmission wave, D16 beam direction control signal,
D17 Transmission antenna switching control signal, D18 Determination result of eclipse determination unit, D19 Received power of reflected wave from target, disturbance noise level such as clutter, information of target existing direction, D20 determination result of reception power determination unit, D2
1 D22 A transmission wave attenuated to a level at which the receiver does not saturate, as a result of the determination by the overall determination unit.

Claims (5)

[Claims] A transmitting / receiving antenna provided in front of the flying object for transmitting radio waves for irradiating a target and receiving a reflected wave from the target; and a transmitting / receiving antenna provided adjacent to the antenna. A transmission-only antenna that transmits a radio wave for irradiating the target by forming a fan beam covering the beam directing range, and a means for appropriately switching the use of the above two antennas, the relative relationship between the target and the flying object and Based on the received power of the reflected wave from the target, or the relative relationship between the target and the flying object or the received power of the reflected wave from the target, switch the radio wave to irradiate the target to one of the two antennas and transmit it. Receiving a reflected wave from the target, even when using one of the two antennas to transmit a radio wave to irradiate the target, characterized in that the transmission and reception antennas are used. Flying body to do. 2. A flying object provided with the two antennas in front thereof, which is output from a transmitter included in the flying object by a control signal output from a component for performing signal processing included in the flying object. Output direction of the transmitted wave
The flying object according to claim 1, wherein the flying object is changed to one of the two antennas. 3. In a flying object equipped with the two antennas in front thereof, a transmission timing of a radio wave to be irradiated to a target based on a relative distance between the target and the flying object, and a reflected wave of the radio wave from the target The reception timing is calculated, and the presence or absence of an event that the target cannot be observed due to the overlap of the two transmission / reception timings is determined.If it is determined that the event does not occur, the radio wave emitted to the target is determined. 2. The transmission means is switched to the transmission / reception antenna, and when it is determined that the event occurs, the transmission means of the radio wave radiated to the target is switched to the transmission-only antenna. Flying object. 4. A means for radiating radio waves to a target in a flying object having the two antennas in front thereof, and transmitting means for radiating the radio waves to the target based on the reception power of reflected waves from the target of the radio waves Is switched to the transmission-only antenna, and a S / N prediction calculation is performed when a reflected wave from a target is received by the transmission / reception antenna. The result of the predicted calculation S / N is a signal processing provided in the flying object. When the level of the reflected wave from the target is lower than the level required for detecting the reflected wave from the target, the transmitting unit of the radio wave radiated to the target is switched to the transmitting / receiving antenna, and the signal processing unit provided on the other hand performs the signal processing. In the case where the level exceeds a level required for detecting a reflected wave from the target in the above, the transmission means of the radio wave radiated to the target is switched to the transmission-only antenna. The flying object according to item 1. 5. A flying object equipped with the two antennas in front thereof transmits radio waves for irradiating a target from the transmission-only antenna, and simultaneously transmits the reflected waves from the target with the transmission / reception antenna. In the case of receiving, the radio wave transmitted from the antenna dedicated to the transmission is received by the receiving antenna, so that the saturation of the receiver included in the flying object does not occur, the transmission provided by the flying object The flying object according to claim 1, wherein the power of the transmission wave output from the aircraft is reduced to a level at which the receiver does not saturate, and output to the transmission-only antenna.