JPH02181683A - Radar simulator device - Google Patents

Abstract

PURPOSE:To simplify the constitution and to reduce limits due to a pitch interval by combining an elliptic surface mirror, a plane antenna, a phased-array antenna, and a conformal array antenna. CONSTITUTION:The plane antenna 14 and a radar antenna 3 to be measured are placed at the focuses 15 and 15 of the elliptic surface mirror. A dummy signal generating circuit radiates information on a distance, a speed, etc., from the plane antenna 14 in a direction indicated by a computer 12. A signal radiated from one focus 15 is reflected by the elliptic surface mirror 13 and received by the radar antenna 3 to be measured at the other focus 15. The beam direction of the radiated signal changes by the rotation of the plane antenna 14 on the focus 15 and the incidence angle direction changes when viewed from the radar antenna 15 to be measured, so that a target seems to move. The plane antenna 14 is driven to change its direction, thereby simulating the movement of the target.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simulator device capable of performing a radar smear test under flight motion environmental conditions.

[Conventional technology]

FIG. 16 shows the configuration of a conventional radar simulator IAR. In the figure, (1) is an anechoic chamber.

(2) is a target simulating antenna, (3) is a radar antenna for the object to be measured, (4) is a radome, and (5) is a flight table.

(6) is a radio wave absorber. FIG. 1T shows the configuration of the target simulating antenna. In fig.

(7) is an element antenna, (8) is a switch, and (9) is a feeding circuit.

1 (I is a pseudo signal generator, and 111J is a control device that controls the switch.

Next, the operation will be briefly explained. First, in Fig. 1T, the signal input from the pseudo signal generator (111) is distributed by the power supply circuit (9).
N signals are sent and radiated by the element antenna (7). The signal radiated from the target simulated antenna shown in the figure passes through the radome (4), is received by the radar antenna to be measured (3), and is subjected to signal processing. According to the movement of the target, the computer (17J, pseudo signal generator an and control device +111) shifts the position of the switch to be turned on and at the same time controls the pseudo signal generator fin according to distance information and speed information. When viewed from the antenna (3) side, the target appears to be moving.

When the target moves as described above, it is evaluated that the target can be tracked by receiving it with the radar antenna (3) of the object to be measured and processing the signal. In addition, since the radar antenna to be measured (3) is placed on the flight table +51 at the same time as the target moves, the position and information of the signal emitted by the target simulated antenna can be adjusted even in response to the flight movement of the own aircraft. It is possible to change.

In addition, a radio wave absorber (6) is used to suppress unnecessary reflected waves.
Measurements are carried out in an anechoic chamber (1) with a t-configuration.

[Problem to be solved by the invention]

Conventional radar simulators have a configuration in which a large number of element antennas and switches are arranged, making the target simulating antenna complex and expensive, and at the same time, there are problems in that it cannot respond to movements smaller than the pitch interval of the element antennas. Ta. In addition, in order to meet multiple targets, the configuration of multiple power supply circuits and switches is required, resulting in a complicated problem.

This invention was made to solve the above problems.
It is an object of the present invention to provide a radar simulator device that has a simple configuration and can reduce restrictions due to pitch and spacing.

[Means to solve the problem]

The radar simulator device according to the present invention has nine configurations in which target simulating antennas are combined with an ellipsoidal mirror and a plane antenna, a phased array antenna, and a conformal array antenna.

[Effect]

The radar simulator device in this invention is.

By combining an ellipsoidal mirror with a planar antenna, a phased array antenna, or a conformal array antenna, the configuration becomes easy and restrictions due to pitch intervals can be reduced.

〔Example〕

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. In Figure 1, (3) is the radar antenna of the object to be measured;
(4) is the radome, and (5) is the flight table.

(6) is a radio wave absorber, e13 is an ellipsoidal mirror, and α fathom is a flat antenna. FIG. 2 shows the cross-sectional layout. In the figure, αS is the focal point of the ellipsoidal mirror. The planar antenna I and the radar antenna of the object to be measured are placed at the focal point t19.

A signal containing information such as distance and speed is emitted by the pseudo signal generator from the plane antenna I placed at the focal point in the direction specified by the computer +13. The signal radiated from one focal point is reflected by the ellipsoidal mirror α3 and received by the radar antenna (3) of the object to be measured placed at the other focal point. By rotating the planar antenna at its focal point.

The beam direction of the radiated signal changes, and when viewed from the radar antenna of the object to be measured, the direction of the incident angle changes, so that the target appears to be moving.

Therefore, by driving the planar antenna α knob and changing the direction, it is possible to simulate the movement of the target.

FIG. 3 is a diagram showing the configuration of another embodiment. In the figure, Oll is a linear phased array antenna.

``a'' is an antenna control device for controlling a phased array antenna. Figure WN2 shows the layout of the cross section. As shown in the figure, a linear phased array antenna and a radar antenna for the object to be measured are placed at two focal positions. A signal containing information such as distance and speed is created by the computer (according to the instructions in step 13) using a pseudo signal generator and sent to the linear phased array antenna. The phase is controlled by a controller αη, and the beam direction is electronically controlled.

Beam control will be explained. FIG. 5 shows a configuration diagram of a 7-second array antenna. In fig.

Nishiki is an element antenna, ■ is a module, and ■ is a power distribution/synthesis circuit. FIG. 6 shows a block diagram of the inside of the module.

In the figure, (19a) is an attenuator, and (19b) is a phase shifter. The signal input from the pseudo signal generator aα to the power distribution/synthesis circuit is divided in power, and the power is divided into %C, :L-
JS/ (enters 1!J.In each module, the attenuator (19a) and phase shifter (19b) are connected to the antenna control device +
The antenna beam is formed under the control of the IT). By controlling the direction of the first equal phase plane by controlling the phase shifter (19b), the equal phase plane can be tilted without moving the antenna, and the direction of the antenna beam formed in the vertical direction can be controlled. can. Therefore, the movement of the target can be simulated in the same way as with the planar antenna.

FIG. 7 shows a configuration diagram of another embodiment. In the figure, 2
D is a planar-phased array antenna. This replaces the linear phased array antenna with a planar array antenna and enables two-dimensional beam scanning. This system is designed to cope with the case where the target moves not in a uniform straight line but in two dimensions. The element antenna is arranged two-dimensionally so that it can respond to changes in the beam scanning t-2 dimension, and the operating principle is the same as that of the linear phased array antenna.

FIG. 8 is a diagram showing the configuration of another embodiment. In the figure, (2) is a conformal array antenna. This is a device in which element antennas are arranged in a spherical shape, and this is placed at the focal point. FIG. 9 shows a cross-sectional layout. As shown in the figure, the beam scanning phase calculated by the computer 113 is sent to the conformal array antenna via the antenna control device, which controls the signal coming from the pseudo signal generator to direct the beam in any direction. Form.

In this case, since it is a conformal array antenna, beam scanning up to a wide angle is possible.

It is possible to widen the movement range of the target. The other operating principles are the same as in the previous case.

FIG. 10 shows a configuration diagram of another embodiment. Also.

FIG. 11 shows the layout of its cross section. This is Prana
Two phased array antennas are arranged.

Based on information such as different distances and speeds from the computer az,
A pseudo signal generator (fit) generates two target pseudo signals and enters each planar array antenna. Beams are controlled and radiated by the respective planar array antennas in the directions corresponding to the respective signals under the control of the computer f13 and the antenna control device aη. and. Since the beams are controlled separately, it is possible to simulate the movement of two different targets. The other operating principles are the same as described above. This is the case with two planar array antennas, but the same applies even if there are more.

A configuration diagram of another embodiment is shown in FIG. FIG. 13 shows the layout of the cross section. This consists of nine combinations of ellipsoidal mirrors and conformal array antennas. Although the configuration is almost the same as in FIGS. 8 and 9, pseudo signals corresponding to a plurality of targets are sent from the pseudo signal generator α port to the conformal array antenna (2). In the conformal array antenna, the element antennas are internally connected by a feeding circuit divided into three parts in the case of Figure 0. The three signals sent from the pseudo signal generator αG are distributed by the respective feeding circuits and radiated from the element antennas connected thereto to form three beams. Like Jin, you can simulate multiple goals. The other operating principles are the same as described above. In the example, there are three simulated goals.

Needless to say, the same is true even if it is more than that.

Next, other embodiments will be described. The configuration in this case is similar to the configurations shown in FIGS. 8 and 9, in which the simulated antenna is of a round shape in which an ellipsoidal mirror is combined with a phased array antenna or a conformal array antenna. At this time, at the phased array antenna r2D and the conformal array antenna.

Form multiple beams. FIG. 14 shows an example of a multi-beam. As shown in the figure, there are three peaks, so
Three targets can be simulated at the same time. In this way, by forming a multi-beam with multiple beams with one antenna.

It becomes a target simulating antenna that can simulate multiple targets. In the example, the three beams have the same peak level, but it goes without saying that any combination of beam numbers and level values may be used.

Next, other embodiments will be described. The structure of the target simulating antenna is the same as the above example, including the combination of an ellipsoidal mirror and a 7-second array antenna, and the combination of an ellipsoidal mirror and a conformal array antenna. Here, the control of the pseudo signal generator and the antenna control device is time-divisionally controlled to simulate a plurality of targets. The time division configuration is shown in FIG. In the figure, the horizontal axis is the time axis and shows the Norse sequence. As shown in the figure, pulse 1. pulse 2
．． ... By repeating pulse n, n targets can be simulated. It goes without saying that this does not need to be done in the same order, as it is sufficient to do this in the order that corresponds to the direction in which the radar antenna, which is the object to be measured, is intended to point.

In the above embodiments, passive 7-point array antennas and conformal array antennas have been considered, but it goes without saying that an active type antenna in which each element is provided with an amplifier may also be used.

It does not depend on the configuration of these antennas.

Further, the pseudo signal generator may have any configuration as long as it can generate a signal capable of simulating a target. [Effects of the Invention] As described above, according to the present invention, a target simulating antenna of a radar simulator device can be used. By combining an ellipsoidal mirror with a planar antenna, a phased array antenna, or a conformal antenna, the configuration is simplified, the device becomes less expensive, and at the same time, the limitations imposed by pitch spacing are alleviated.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a radar simulator device according to an embodiment of the present invention, FIG. 2 is a diagram showing a cross-sectional arrangement, and FIG. 3 is a diagram showing the configuration of a radar simulator device according to another embodiment of the invention. 4 is a diagram showing the arrangement of a cross section of another embodiment, FIG. 5 is a diagram showing the configuration of a phased array antenna, FIG. 6 is a diagram showing the configuration of a module, and FIG. The eighth factor is a diagram showing the configuration of a radar simulator device according to another embodiment. FIG. 9 is a diagram showing the arrangement of a cross section of another embodiment. FIG. 10 11 is a diagram showing the configuration of a radar simulator device according to another embodiment, and FIG. 11 is a diagram showing the arrangement of a cross section of another embodiment. FIG. 12 is a diagram showing the configuration of a radar simulator device according to another embodiment, and FIG. 13 is a diagram showing a cross-sectional layout of another embodiment.
Figure 14 is a diagram showing the antenna pattern, Figure 15 is a diagram showing the antenna pattern.
FIG. 16 is a diagram showing a pulse train, FIG. 16 is a diagram showing the configuration of a conventional radar simulator device, and FIG. 1T is a diagram showing the arrangement of a cross section of the conventional device. In the figure, (1) is an anechoic chamber, (2) is a target simulating antenna, (3) is a radar antenna for the object to be measured, (4) is a radome, +5) is a flight table, and 16) is a radio wave absorber. (7) is an element antenna, (8) is a switch, (9) is a feeding circuit, a (I is a pseudo signal generator, αυ is a control device that controls the switch, az is a computer, and !1m is an ellipsoidal mirror. I is a planar antenna, 115 is a focal point of an ellipsoidal mirror, Oe is a linear phased array antenna, arI is an antenna control device, (ls is an element antenna, (1g is a module, (19m) is an attenuator, (19b) is a phase shifter , ■ is a power distribution/synthesis circuit, and C21) is a planar-phased array antenna, @Haconformal array antenna. In Figure 1, the same reference numerals indicate the same or equivalent parts. Figure Figure Figure Figure Figure tlL Procedural Amendment 2, Name of Invention Radar Simierator Device 3, Person Making Amendment Representative Moriya Shiki Subject of Amendment

Claims (8)

[Claims] (1) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. A radar simulator device comprising a small transmitting antenna and a target simulating antenna controlled by a switch, characterized in that the target simulating antenna is configured by combining an ellipsoidal mirror and a flat antenna. (2) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. A radar simulator device comprising a small transmitting antenna and a target simulating antenna controlled by a switch, characterized in that the target simulating antenna is configured by combining an ellipsoidal mirror and a one-dimensional phased array antenna. Device. (3) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. A radar simulator device comprising a small transmitting antenna and a target simulating antenna controlled by a switch, characterized in that the target simulating antenna is configured by combining an ellipsoidal mirror and a two-dimensional phased array antenna. Device. (4) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. A radar simulator device comprising a small transmitting antenna and a target simulating antenna controlled by a switch, characterized in that the target simulating antenna is configured by combining an ellipsoidal mirror and a conformal array antenna. (5) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. In this radar simulator device, which consists of a small transmitting antenna and a target simulating antenna controlled by a switch, the target simulating antenna is configured to be able to simulate two targets by combining an ellipsoidal mirror and two phased array antennas. A radar simulator device characterized by: (6) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. In this radar simulator device, which consists of a small transmitting antenna and a target simulating antenna controlled by a switch, the target simulating antenna is divided into multiple ellipsoidal mirrors and conformal array antennas to create a configuration that can simulate multiple targets. A radar simulator device characterized by: (7) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. In a simulator device consisting of a small transmitting antenna and a target simulated antenna controlled by a switch, the target simulated antenna is combined with an ellipsoidal mirror and a phased array antenna or a conformal array antenna to control the phase and amplitude. A simulator device characterized in that it is configured to be able to generate multiple beams and simulate multiple targets. (8) Opposing the radar antenna attached to the flight table and said antenna, radio waves are incident on the radar antenna from a direction whose angle with the radar antenna is changed according to the movement of the target and the oscillation of the radar antenna. In a radar simulator device consisting of a small transmitting antenna and a target simulating antenna controlled by a switch, the target simulating antenna is combined with an ellipsoidal mirror and a phased array antenna or a conformal array antenna to time-share multiple A radar simulator device characterized by having a configuration capable of simulating a target.