KR20220111153A - Propagation delay apparatus and method for minimizing the distance of the target generated from the radar electronic target generator - Google Patents

Abstract

According to the present invention, a propagation delay device for minimizing a distance from a target generated from a radar electronic target generator, comprises: first and second propagation delay units for performing propagation delay of a received radar signal; a first switcher for switching the received radar signal to an input of any one of the first and second propagation delay units; a second switcher for outputting any one of outputs of the first and second propagation delay units as a radar transmission signal; and a control unit for calculating an aimed propagation delay on the basis of an aimed test distance to perform switching controls of the first and second switchers and propagation delay controls of the first and second propagation delay units.

Description

Propagation delay apparatus and method for minimizing the distance of the target generated from the radar electronic target generator

The present invention relates to a propagation delay apparatus and method for minimizing the distance of a target generated by a radar electronic target generating device, and more particularly, to control a delay corresponding to a radar electronic target when a reflected signal is generated by receiving a radar signal .

That is, the present invention relates to a propagation delay apparatus and method for minimizing the distance of a target generated in a radar electronic target generating apparatus by generating a reflected signal in consideration of additional propagation delay components in addition to a propagation delay value inherent to the propagation delay apparatus.

Radar is a device that detects the distance to the target using Equation 1 by measuring the time it takes for the transmitted radio wave to collide with the target and return.

[Equation 1]

where R is the distance to the target, Δt is the time difference between the radar's transmitted and received signals, and c is the speed of propagation.

In order to test the distance detection performance of such a radar, there is a method of using a reflector. This is a method of installing a reflector at a distance R away from the radar and checking whether the distance R is detected by the radar.

Another example of testing radar performance is a method of testing using a device that generates a target electronically, which receives a signal from the radar, delays it by Δt time by a propagation delay means, and then retransmits it to the radar. At this time, the radar detects that there is a target at the distance R corresponding to the delay time Δt because the transmitted radio wave is delayed by the time Δt and returned.

A device including such a function is hereinafter referred to as an “electronic target generating device”, and a device included in the electronic target generating device to delay propagation by time Δt is hereinafter referred to as a “propagation delay device”.

As a known technique for time delaying a high-frequency signal of a radar in a propagation delay device, a radio wave passes through passive elements such as a wave guide, a filter, a coaxial cable, and an optical cable. There are an analog method using a propagation delay that occurs when a signal is generated, and a digital method of digitally sampling a high-frequency signal, recording it in a memory device, and reading it out again after a predetermined time delay.

Meanwhile, in the propagation delay device, other propagation delay components may be added to the inside and outside of the propagation delay device in addition to the propagation delay values inherent to the propagation delay elements, and these components are hereinafter referred to as “additional propagation delay components”.

Looking at an example of the propagation delay component added inside the propagation delay device, in the optical cable method that is often used for long-distance propagation delay, a high-frequency signal is converted into an optical signal in order to transmit a radio frequency signal (RF) through an optical cable. In the process of converting it back to a high-frequency signal, a propagation delay is generated and is added to the inherent propagation delay value of the optical cable. In addition, when an optical cable is connected or switched, an surplus optical cable is required. Here, an additional propagation delay component is generated and added to the inherent propagation delay value by the optical cable.

As another example of the propagation delay components added inside the propagation delay device, in a digital propagation delay device that delays propagation using a memory element, a high frequency signal is converted into a digital signal, and additional propagation is performed in the process of converting it back into a high frequency signal. A delay component is generated and added to the propagation delay device-specific propagation delay value.

On the other hand, as an example of the propagation delay added outside the propagation delay device, there are additional propagation delay components by a plurality of high-frequency cables for transmission of a high-frequency signal inside the radar electronic target generating device. It is a known fact that propagation delay occurs in proportion to the length of the cable when the radio wave passes through a high-frequency cable, and these additional propagation delay components are added to the propagation delay value inherent to the propagation delay device.

These additional propagation delay components are unintended delays and limit the minimum target distance that can be generated by the radar electronic target generating device.

As an example, it is assumed that the sum of the additional propagation delay values inside any one radar electronic target generating device is 10m when converted into a round trip distance. Even if the propagation delay is set to '0' in the propagation delay device in the radar electronic target generating device, since 10m exists as an additional propagation delay component, the radar detects that there is a target at a distance of 10m. The distance test within 10m cannot be performed on the target generating device.

The additional propagation delay value of such a radar electronic target generator may vary for each radar electronic target generator, but since it is a fixed value in one radar electronic target generator, it can be measured in advance using a measuring device.

Meanwhile, in recent years, radar has been widely used as a sensor for detecting targets existing in a short distance, such as a vehicle collision avoidance system and a non-contact flow gauge, as well as long-distance target detection. However, it has been difficult to test such a short-range target with a radar electronic target generating device having large additional propagation delay components as in the above example.

That is, in Korean Patent Laid-Open Publication No. 10-2012-0055623, the anti-collision radar in a narrow space such as indoors without using a target such as a reflector or performing a driving test on an actual road through a simulated target for the anti-collision radar test Disclosed is a radar target device that tests the operation and performance of a collision avoidance radar mounted on a vehicle, ship, train, etc.

However, in such a conventional radar target device, since additional propagation delay components exist in addition to the propagation delay value inherent to the propagation delay device, the received radar signal can be retransmitted with a propagation delay smaller than the propagation delay value due to the additional propagation delay components. There is a problem that there is no such thing, and also there is a limit in that it is not possible to physically perform continuous propagation delay.

Korean Patent Publication No. 10-2012-0055623 (2012.05.24)

It is an object of the present invention to retransmit a radar signal with a propagation delay smaller than the propagation delay value due to the additional propagation delay components in a situation in which additional propagation delay components exist in addition to the propagation delay value inherent in the propagation delay device, An object of the present invention is to provide a propagation delay device and method for minimizing the distance of a target generated by an electronic target generating device.

Another object of the present invention is to provide a propagation delay device and method for minimizing the distance of a target generated by a radar electronic target generating device, which can generate an electronic target signal by performing a physically continuous propagation delay.

A propagation delay apparatus for minimizing a distance of a target generated by a radar electronic target generating apparatus according to an embodiment of the present invention comprises: a first propagation delay unit and a second propagation delay unit for delaying a propagation of a received radar signal; a first changer for switching the received radar signal to an input of either the first propagation delay unit or the second propagation delay unit; a second changer for outputting either an output of the first propagation delay unit or the second propagation delay unit as a radar transmission signal; and calculating a target propagation delay based on the target test distance to control the switching of the first changer, the switching control of the second changer, control of the propagation delay of the first propagation delay unit, and control of the propagation delay of the second propagation delay unit. It may include; a control unit that performs the.

Here, the second propagation delay unit may have a propagation delay characteristic smaller than a minimum propagation delay of the first propagation delay unit.

In addition, when the target propagation delay is smaller than the minimum propagation delay of the first propagation delay unit, the control unit is configured to retransmit the received radar signal to the radar through the second propagation delay unit. You can control the gear.

In addition, when the target propagation delay is greater than the minimum propagation delay of the first propagation delay unit, the control unit is configured to retransmit the received radar signal to the radar through the first propagation delay unit. You can control the gear.

Meanwhile, the first propagation delay unit may be configured as an optical cable delay device having an optical cable for long-distance propagation delay.

In addition, the second propagation delay unit may be configured as a coaxial cable delayer having a coaxial cable for short-distance propagation delay.

In this case, the optical cable delay unit includes: an electro-optical converter for converting the optical cable delay input into an optical signal;

a first optical cable, a second optical cable, and an n-th optical cable delaying the optical signal and having different propagation delay characteristics; an optical signal changer for controlling the propagation delay by a combination of the first optical cable, the second optical cable, and the n-th optical cable based on the propagation delay control signal of the controller; and a photoelectric converter that converts the optical signal controlled by the optical signal changer into an output of the optical cable delayer.

In addition, the optical cable delay unit, an electro-optical converter for converting the optical cable delay input into an optical signal; an upper mirror unit and a lower mirror unit for delaying propagation by providing a reflection path of the optical signal; a driving unit for varying the distance between the upper mirror unit and the lower end mirror unit by driving the upper end mirror unit or the lower end mirror unit based on the propagation delay control signal of the control unit; and a photoelectric converter that converts the optical signal delayed in propagation by the upper mirror unit and the lower mirror unit into an output of the optical cable delay unit.

On the other hand, the coaxial cable delay unit, a first coaxial cable, a second coaxial cable, to an nth coaxial cable delaying the input of the coaxial cable delay unit and having different propagation delay characteristics; an input signal changer for selecting and inputting the coaxial cable delayer input from the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the controller; and an output signal changer for selecting any one of the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the control unit and outputting it as a coaxial cable delay output; can do.

A propagation delay method for minimizing a target distance generated by a radar electronic target generating device according to another embodiment of the present invention includes: a target test distance input step of receiving a target test distance from a controller; a target propagation delay calculation step of calculating a target propagation delay by the control unit based on the target test distance; a target propagation delay comparison step of comparing the target propagation delay with a minimum propagation delay of a first propagation delay unit; When the target propagation delay is smaller than the minimum propagation delay of the first propagation delay unit, the control unit controls the first changer and the second changer so that the received radar signal is retransmitted to the radar through the second propagation delay unit, When the propagation delay is greater than the minimum propagation delay of the first propagation delay unit, a propagation delay step of controlling the first changer and the second changer so that the received radar signal is retransmitted to the radar through the first propagation delay unit; can do.

Here, the second propagation delay unit may have a propagation delay characteristic smaller than a minimum propagation delay of the first propagation delay unit.

In this case, the first propagation delay unit may be configured as an optical cable delay device having an optical cable for long-distance propagation delay.

In addition, the optical cable delay unit, an electro-optical converter for converting the optical cable delay input into an optical signal; a first optical cable, a second optical cable, and an n-th optical cable delaying the optical signal and having different propagation delay characteristics; an optical signal changer for controlling the propagation delay by a combination of the first optical cable, the second optical cable, and the n-th optical cable based on the propagation delay control signal of the controller; and a photoelectric converter for converting the optical signal controlled by the optical signal changer into an output of the optical cable delayer.

Meanwhile, the second propagation delay unit may be configured as a coaxial cable delay unit having a coaxial cable for short-distance propagation delay.

In addition, the coaxial cable delay unit, a first coaxial cable, a second coaxial cable, to an n-th coaxial cable delaying the input of the coaxial cable delay unit and having different propagation delay characteristics; an input signal changer for selecting and inputting the coaxial cable delayer input from the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the controller; and an output signal changer for selecting any one of the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the control unit and outputting it as a coaxial cable delay output; can do.

Propagation delay apparatus and method for minimizing the distance of a target generated by the radar electronic target generating apparatus according to the present invention, additional propagation delay components in the presence of additional propagation delay components in addition to the propagation delay value inherent in the propagation delay device There is an advantage in that the radar signal can be retransmitted with a propagation delay smaller than the propagation delay value by .

In addition, the propagation delay apparatus and method for minimizing the distance of the target generated by the radar electronic target generating apparatus according to the present invention has an advantage in that it is possible to generate an electronic target signal by physically performing continuous propagation delay.

1 is a schematic configuration diagram of a propagation delay device for minimizing the distance of a target generated by a radar electronic target generating device according to an embodiment of the present invention.
FIG. 2 is a detailed configuration diagram of the propagation delay device of FIG. 1 .
3 is a detailed configuration diagram of the optical cable delay of FIG.
4 is a detailed configuration diagram according to another embodiment of the optical cable delay of FIG.
5 is a detailed configuration diagram of the coaxial cable delay of FIG.
6 is a flowchart illustrating a propagation delay method for minimizing the distance of a target generated by the radar electronic target generating apparatus according to an embodiment of the present invention.

Detailed embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to a specific embodiment, it can be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Hereinafter, with reference to the accompanying drawings, a propagation delay apparatus and method for minimizing the distance of the target generated by the radar electronic target generating apparatus according to the present invention will be described in detail.

1 is a schematic configuration diagram of a propagation delay device for minimizing the distance of a target generated by a radar electronic target generating device according to an embodiment of the present invention, and FIGS. 2 to 5 are detailed configuration diagrams for explaining FIG. 1 in detail to be.

Hereinafter, a propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 .

First, referring to FIG. 1 , the propagation delay apparatus for minimizing the distance of the target generated by the radar electronic target generating apparatus according to an embodiment of the present invention performs the first propagation delay of the received radar signal 110 . The delay unit 101 and the second propagation delay unit 102, the second propagation delay unit 102, the reception radar signal 110 to perform switching to any one input of the first propagation delay unit 101 or the second propagation delay unit 102 1 changer 103, a second changer 104 that outputs any one of the outputs of the first propagation delay unit 101 or the second propagation delay unit 102 as a radar transmission signal 115, and a target test By calculating a target propagation delay based on the distance, the switching control of the first changer 103, the switching control of the second changer 104, the propagation delay control of the first propagation delay unit 101, and the second propagation delay unit and a control unit (105) that performs propagation delay control of (102).

Here, the second propagation delay unit 102 may have a propagation delay characteristic smaller than the minimum propagation delay of the first propagation delay unit 101 .

In this case, the calculation of the target propagation delay based on the target test distance may be calculated by Equation 2 below.

[Equation 2]

Here, Δt is the target propagation delay, R is the target test distance (the input target generation distance), and c is the propagation speed.

When the target propagation delay is smaller than the minimum propagation delay of the first propagation delay unit 101, the control unit 105 is configured to retransmit the radar signal to the radar through the second propagation delay unit 102. The second changer 104 may be controlled.

Also, when the target propagation delay is greater than the minimum propagation delay of the first propagation delay unit 101 , the control unit 105 controls the first changer 103 to retransmit the radar signal to the radar through the first propagation delay unit 101 . ) and the second changer 104 can be controlled.

That is, the received radar signal 110 is switched by the control unit 105 so as to be input to either the first propagation delay unit 101 or the second propagation delay unit 102 through the first changer 103, The second changer 104 switches the output of the selected delay unit among the first propagation delay unit 101 or the second propagation delay unit 102 to output the signal as the radar transmission signal 115 .

The first propagation delay unit 101 is implemented by an optical cable method or a digital method among a plurality of propagation delay methods of high-frequency signals. Additional propagation delay components such as AD conversion and DA conversion have many disadvantages.

On the other hand, the second propagation delay unit 102 is implemented by a coaxial cable propagation delay method, and in this case, the physical size is large, so it is mainly used to implement a short-distance propagation delay device, but has an advantage in that there are few additional propagation delay components.

The first propagation delay unit 101 and the second propagation delay unit 102 adjust the propagation delay value according to the propagation delay control signal 117 provided by the control unit 105, and this propagation delay is determined by the propagation delay elements. It may be configured to use one of the propagation delay elements or to use a combination of a plurality of propagation delay elements.

The reception transmission line 106 transmits the high-frequency signal of one contact of the first changer 103 to the input of the first propagation delay unit 101, and may be configured as a high-frequency cable. The reception transmission line 106 may be configured by applying high-frequency signal processing processes such as an amplification process for amplifying a signal, a conversion process for converting an electrical signal into an optical signal, and an attenuation process for reducing the size of the signal. All processes have an additional propagation delay component.

In addition, the transmission transmission line 107 transmits the high frequency signal, which is the output of the first propagation delay unit 101 , to one contact point of the second changer 104 , and may be configured as a high frequency cable. High-frequency signal processing processes such as an amplification process for amplifying a signal, a conversion process for converting an optical signal into an electrical signal, and an attenuation process for reducing the size of the signal may be applied to the transmission transmission line 107 as well. All processes also have an additional propagation delay component.

That is, the minimum propagation delay of the first propagation delay unit 101 includes a propagation delay inside the first propagation delay unit 101 and an additional propagation delay component used to connect it, and similarly, the second propagation delay unit ( 102 may also include some additional propagation delay components with respect to the reception transmission line 112 which is an input interface of the second propagation delay unit 102 and the transmission transmission line 114 which is an output interface.

At this time, the first propagation delay unit 101 and the second propagation delay unit 102 may have different propagation delay values, that is, the minimum propagation delay of the second propagation delay unit 102 is the first propagation delay unit ( 101) may have a propagation delay value smaller than the minimum propagation delay.

In the present invention, when the propagation delay value converted according to the target test distance 116 is greater than the minimum propagation delay of the first propagation delay unit 101, the control unit 105 selects the first propagation delay unit 101 and The signal of the received radar signal 110 is delayed and output as the radar transmission signal 115, while the propagation delay value converted according to the target test distance 116 is smaller than the minimum propagation delay of the first propagation delay unit 101. In this case, since the use of the first propagation delay unit 101 is impossible, the second propagation delay unit 102 is selected to delay the signal of the received radar signal 110 and output as the radar transmission signal 115 .

Through this, the propagation delay device that minimizes the distance of the target generated by the radar electronic target generating device according to the present invention can implement a propagation delay smaller than the minimum propagation delay of the first propagation delay unit 101 .

FIG. 2 is a detailed configuration diagram of the propagation delay device of FIG. 1 .

As can be seen in FIG. 2 , in the present invention, the first propagation delay unit 101 may be composed of an optical cable delay unit 222 having an optical cable for long-distance propagation delay, and the second propagation delay unit 102 . may be configured as a coaxial cable delay unit 214 having a coaxial cable for short-range propagation delay.

2 shows an example of performing in a shield room 20 in order to minimize external jamming in the testing process of the radar 10, the target generated by the radar electronic target generating device according to the present invention. The propagation delay device for minimizing the distance may be divided into a pre-processing unit 210 and a post-processing unit 220 .

Here, the pre-processing unit 210 serves to reduce a very high radar signal frequency to facilitate signal processing, and may be installed inside the shield room 20, a radar signal receiving antenna 211, a receiving unit ( 212 ), a reception signal changer 213 , a coaxial cable delay unit 214 , a transmission signal changer 217 , a transmission unit 216 , and a transmission antenna 215 .

In addition, the post-processing device 220 may be located outside the shield room 20, receives the signal from the pre-processing device 210, processes it into a signal suitable for a radar test, and delays the radar signal according to the target generation distance. Afterwards, it serves to retransmit to the preprocessing unit 210 , and may include a receiving amplifier 221 , an optical cable delay 222 , a transmitting amplifier 223 , and a control unit 105 .

The high-frequency signal connection between the pre-processing unit 210 and the post-processing unit 220 is connected by a reception signal transmission cable 231 and a transmission signal transmission cable 232 , and the control unit 105 in the post-processing unit 220 is an optical cable It can be configured to be connected to the delay 222 and the coaxial cable delay 214 . In addition, the changer control signal 118 of the control unit 105 in the post-processing unit 220 may be configured to control the receive signal changer 213 and the transmit signal changer 217 in the preprocessing unit 210 . .

On the other hand, in FIG. 2, the optical cable delay unit 222 is the first propagation delay unit 101 of FIG. 1, and the coaxial cable delay unit 214 in FIG. 2 is the second propagation delay unit 102 of FIG. The reception signal changer 213 may correspond to the first changer 103 of FIG. 1 , and the transmission signal changer 217 of FIG. 2 may correspond to the second changer 104 of FIG. 1 .

The reception amplifier 221 compensates for losses that may occur in the reception signal changer 213 and the reception signal transmission cable 231 while the output signal of the reception unit 212 is transmitted to the optical cable delay 222, and delays the optical cable. It can be installed to adjust to the proper power level required for the device 222 .

In addition, the transmission amplifier 223 compensates for losses that may occur in the transmission signal transmission cable 232 and the transmission signal changer 217 while the output of the optical cable delay 222 is transmitted to the transmission unit 216, and the transmission unit ( 216) to adjust to the proper power level required.

3 is a detailed configuration diagram of the optical cable delay 222 of FIG.

3, the optical cable delay 222 of the present invention is an electro-optical converter 301 that converts the optical cable delay input 321 into an optical signal, delays the optical signal and has different propagation delay characteristics. The first optical cable 309, the second optical cable 310, to the nth optical cable 311, based on the propagation delay control signal 117 of the control unit 105, the first optical cable 309, the second optical cable 310, An optical signal changer 302 for controlling propagation delay by a combination of the to nth optical cable 311, and an optical signal converter for converting the optical signal controlled by the optical signal changer 302 into an optical cable delay output 322 ( 308) may be included.

Here, the first optical cable 309, the second optical cable 310, and the nth optical cable 311 have their propagation delay values increased in proportion to their lengths, and are configured to have different propagation delay values by adjusting the length of the optical cables. can do.

In addition, it may include an electro-optical converter 301 that converts the radar propagation signal input to pass the optical cable into an optical signal, and a photoelectric converter 308 that converts the optical signal back into a radio signal and outputs it.

That is, the optical cable delayer 222 of the present invention converts a plurality of propagation delay elements composed of an optical cable to a plurality of propagation delay values by a combination of the connection or short circuit of the optical signal changers 302 by the propagation delay control signal 117. can create

For example, the first optical cable 309 adjusts the length of the optical cable to have a propagation delay characteristic of 1 [ms], the second optical cable 310 is 2 [ms], and the n-th optical cable 311 is 4 [ms] A process of generating a plurality of propagation delay values when installed with

If the optical signal changer 302 is controlled with the propagation delay control signal 117 to connect only the first optical cable 309, the basic propagation delay between the input and output of the optical cable delay 222 is 1 [ms]. do.

On the other hand, if the optical signal changer 302 is controlled with the propagation delay control signal 117 to connect only the first optical cable 309 and the nth optical cable 311, the basic propagation between the input and output of the optical cable delayer 222 is controlled. The delay becomes 1[ms]+4[ms]=5[ms].

In this way, the optical cable delay 222 may implement a plurality of propagation delay values according to the propagation delay control signal 117 .

In the case of the optical cable delay 222 of FIG. 3 , the volume occupied by the optical cables is small, so even if a large propagation delay is implemented, it has an advantage that it can be implemented with a small physical size. There is a disadvantage in that many additional propagation delay components are added to the inherent propagation delay value due to the optical cables for transmitting the optical signal between the groups 302 .

4 is a detailed configuration diagram according to another embodiment of the optical cable delay 222 of FIG.

The optical cable delay 222 of FIG. 4 includes an electro-optical converter 301 that converts the optical cable delay input 321 into an optical signal, an upper mirror 330 for delaying propagation by providing a reflection path of the optical signal, and a lower A driving unit 331 that drives the upper mirror unit 330 based on the propagation delay control signal 117 of the mirror unit 340 and the control unit 105 to vary the distance between the upper mirror unit 330 and the lower mirror unit 340 . ), and a photoelectric converter 308 for converting an optical signal delayed in propagation in the upper mirror unit 330 and the lower mirror unit 340 into an optical cable delay output 322 .

Here, the optical cable delay input 321 is converted into an optical signal through the electro-optical converter 301, and reflection is performed in the lower mirror unit 340 and the upper mirror unit 330. At this time, the propagation delay control signal 117 By controlling the furnace driving unit 331 to vary the distance between the upper mirror unit 330 and the lower mirror unit 340 , the reflection distance within the upper mirror unit 330 and the lower mirror unit 340 is also varied. Thereafter, the optical signal reflected in the upper mirror unit 330 and the lower mirror unit 340 is photoelectrically converted by the photoelectric converter 308 and output to the optical cable delay output 322 .

The optical cable retarder of FIG. 4 as described above can provide continuous propagation delay characteristics, and thus has an advantage in performing tests such as Doppler characteristics of a radar whose distance must be varied in real time.

5 is a detailed configuration diagram of the coaxial cable delay 214 of FIG.

As can be seen from FIG. 5 , the coaxial cable delayer 214 of the present invention delays the coaxial cable delayer input 407 and has a first coaxial cable 402 and a second coaxial cable having different propagation delay characteristics. (403), to the nth coaxial cable 405, the first coaxial cable 402, the second coaxial cable 403 based on the propagation delay control signal 117 of the control unit 105, the coaxial cable delay input 407 ), to the first coaxial cable 402, the first coaxial cable 402 based on the propagation delay control signal 117 of the control unit 105, and the input signal changer 401 for selecting and inputting any one of the nth coaxial cables 405 2 coaxial cable 403, to select any one of the n-th coaxial cable 405 may be configured to include an output signal changer 406 for outputting the coaxial cable delay output 408.

5 shows one embodiment of a coaxial cable delayer 214 in the preprocessing device 210 of FIG. 2, wherein the coaxial cable delayer 214 includes a first coaxial cable 402, a second coaxial cable ( 403), to control the input signal changer 401 and the output signal changer 406 by the propagation delay control signal 117 for a plurality of propagation delay elements composed of the nth coaxial cable 405, Propagation delay values may be implemented.

On the other hand, in this case, since the physical size of the coaxial cable itself is larger than that of the optical cable, the larger the propagation delay is realized, the more coaxial cables are needed, which increases the physical size of the coaxial cable delayer. The lack of circuitry has the advantage that the additional propagation delay components are very small.

6 is a flowchart illustrating a propagation delay method for minimizing the distance of a target generated by the radar electronic target generating apparatus according to an embodiment of the present invention.

As can be seen in FIG. 6 , the propagation delay method for minimizing the distance of the target generated by the radar electronic target generating apparatus of the present invention includes the steps of receiving the target test distance from the control unit 105 ( S100 ), the control unit 105 . ), calculating the target propagation delay based on the target test distance (S200), comparing the target propagation delay in the controller 105 with the minimum propagation delay of the first propagation delay unit 101 (S300), the target propagation delay If it is smaller than the minimum propagation delay of the first propagation delay unit 101, the first changer 103 and the second changer 104 are configured so that the radar signal is retransmitted to the radar through the second propagation delay unit 102. In the controlling step (S400), and when the target propagation delay is greater than the minimum propagation delay of the first propagation delay unit 101, the first changer ( 103) and controlling the second changer 104 (S500).

Here, the first propagation delay unit 101 may be composed of an optical cable delay unit 222 having an optical cable for long-distance propagation delay, and the second propagation delay unit 102 includes a coaxial cable for short-distance propagation delay. It may be made of a coaxial cable delay 214 .

The reception radar signal 110 is controlled by switching to either the first propagation delay unit 101 or the second propagation delay unit 102 through the first changer 103, and the second changer 104 is controlled by the control unit ( 105 , the output of any one of the first propagation delay unit 101 and the second propagation delay unit 102 is output as the radar transmission signal 115 .

At this time, the minimum propagation delay of the second propagation delay unit 102 is set to have a propagation delay value smaller than the minimum propagation delay of the first propagation delay unit 101, so that the propagation delay that cannot be implemented in the first propagation delay unit 101 is reduced. By implementing in the second propagation delay unit 102 , a propagation delay smaller than the minimum propagation delay of the first propagation delay unit 101 may be implemented.

That is, when the propagation delay value converted according to the target test distance 116 is greater than the minimum propagation delay of the first propagation delay unit 101, the control unit 105 selects the first propagation delay unit 101 to receive radar. The signal 110 is delayed and output as a radar transmission signal 115 . On the other hand, when the propagation delay value converted according to the target test distance 116 is smaller than the minimum propagation delay of the first propagation delay unit 101, the use of the first propagation delay unit 101 is not possible, so the second propagation delay unit By selecting 102, the received radar signal 110 is delayed and output as a radar transmission signal 115.

On the other hand, since the description of other components such as the optical cable delay unit and the coaxial cable delay unit has been described above, a detailed description thereof will be omitted.

The propagation delay method for minimizing the distance of the target generated by the radar electronic target generating apparatus according to the present invention has the advantage of implementing a propagation delay smaller than the minimum propagation delay of the first propagation delay unit 101 .

As described above, the propagation delay apparatus and method for minimizing the distance of the target generated by the radar electronic target generating apparatus according to the present invention provides additional propagation in the presence of additional propagation delay components in addition to the propagation delay value inherent in the propagation delay apparatus. A radar signal may be retransmitted with a propagation delay smaller than a propagation delay value due to delay components, and an electronic target signal may be generated by performing physically continuous propagation delay.

What has been described above includes examples of one or more embodiments. Of course, it is not possible to describe every possible combination of components or methods for purposes of describing the above-described embodiments, and those skilled in the art will recognize that many further combinations and permutations of the various embodiments are possible. Accordingly, the described embodiments are intended to embrace all alternatives, modifications and adaptations falling within the spirit and scope of the appended claims.

Claims (15)

a first propagation delay unit and a second propagation delay unit performing propagation delay of the received radar signal;
a first changer for switching the received radar signal to an input of either the first propagation delay unit or the second propagation delay unit;
a second changer for outputting either an output of the first propagation delay unit or the second propagation delay unit as a radar transmission signal; and
By calculating a target propagation delay based on the target test distance, the switching control of the first changer, the switching control of the second changer, the propagation delay control of the first propagation delay unit, and the propagation delay control of the second propagation delay unit are performed. A propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device comprising a; The method of claim 1,
The second propagation delay unit, a propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that it has a propagation delay characteristic smaller than the minimum propagation delay of the first propagation delay unit. The method of claim 1,
When the target propagation delay is smaller than the minimum propagation delay of the first propagation delay unit, the control unit controls the first changer and the second changer so that the received radar signal is retransmitted to the radar through the second propagation delay unit. A propagation delay device to minimize the distance of the target generated by the radar electronic target generating device, characterized in that. The method of claim 1,
When the target propagation delay is greater than the minimum propagation delay of the first propagation delay unit, the control unit controls the first changer and the second changer so that the received radar signal is retransmitted to the radar through the first propagation delay unit. A propagation delay device to minimize the distance of the target generated by the radar electronic target generating device, characterized in that. The method of claim 1,
The first propagation delay unit is a propagation delay device for minimizing the distance of the target generated in the radar electronic target generating device, characterized in that composed of an optical cable delay having an optical cable for long-distance propagation delay. The method of claim 1,
The second propagation delay unit is a propagation delay device for minimizing the distance of the target generated in the radar electronic target generating device, characterized in that it is composed of a coaxial cable delay having a coaxial cable for short-distance propagation delay. 6. The method of claim 5,
The optical cable delay device,
an electro-optical converter that converts the optical cable delay input into an optical signal;
a first optical cable, a second optical cable, and an n-th optical cable delaying the optical signal and having different propagation delay characteristics;
an optical signal changer for controlling the propagation delay by a combination of the first optical cable, the second optical cable, and the n-th optical cable based on the propagation delay control signal of the controller; and
A propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that it comprises; 6. The method of claim 5,
The optical cable delay device,
an electro-optical converter that converts the optical cable delay input into an optical signal;
an upper mirror unit and a lower mirror unit for delaying propagation by providing a reflection path of the optical signal;
a driving unit for varying the distance between the upper mirror unit and the lower end mirror unit by driving the upper end mirror unit or the lower end mirror unit based on the propagation delay control signal of the control unit; and
Propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that it comprises; . 7. The method of claim 6,
The coaxial cable delay device,
a first coaxial cable, a second coaxial cable, and an nth coaxial cable delaying the coaxial cable delay input and having different propagation delay characteristics;
an input signal changer for selecting and inputting the coaxial cable delayer input from the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the controller; and
An output signal changer for selecting any one of the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the control unit and outputting it as an output of the coaxial cable delayer; including A propagation delay device for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that. a target test distance input step of receiving a target test distance from the controller;
a target propagation delay calculation step of calculating a target propagation delay by the control unit based on the target test distance;
a target propagation delay comparison step of comparing the target propagation delay with a minimum propagation delay of a first propagation delay unit;
When the target propagation delay is smaller than the minimum propagation delay of the first propagation delay unit, the control unit controls the first changer and the second changer so that the received radar signal is retransmitted to the radar through the second propagation delay unit, When the propagation delay is greater than the minimum propagation delay of the first propagation delay unit, a propagation delay step of controlling the first changer and the second changer so that the received radar signal is retransmitted to the radar through the first propagation delay unit; A propagation delay method for minimizing the distance of the target generated by the radar electronic target generating device. 11. The method of claim 10,
The second propagation delay unit, the propagation delay method for minimizing the distance of the target generated in the radar electronic target generating apparatus, characterized in that it has a propagation delay characteristic smaller than the minimum propagation delay of the first propagation delay unit. 11. The method of claim 10,
The first propagation delay unit is a propagation delay method for minimizing the distance of the target generated in the radar electronic target generating device, characterized in that composed of an optical cable delay having an optical cable for long-distance propagation delay. 13. The method of claim 12,
The optical cable delay device,
an electro-optical converter that converts the optical cable delay input into an optical signal;
a first optical cable, a second optical cable, and an n-th optical cable delaying the optical signal and having different propagation delay characteristics;
an optical signal changer for controlling the propagation delay by a combination of the first optical cable, the second optical cable, and the n-th optical cable based on the propagation delay control signal of the controller; and
The propagation delay method for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that it comprises; 11. The method of claim 10,
The second propagation delay unit is a propagation delay method for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that consisting of a coaxial cable delay having a coaxial cable for short-distance propagation delay. 15. The method of claim 14,
The coaxial cable delay device,
a first coaxial cable, a second coaxial cable, and an nth coaxial cable delaying the coaxial cable delay input and having different propagation delay characteristics;
an input signal changer for selecting and inputting the coaxial cable delayer input from the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the controller; and
An output signal changer for selecting any one of the first coaxial cable, the second coaxial cable, and the nth coaxial cable based on the propagation delay control signal of the control unit and outputting it as an output of the coaxial cable delayer; including A propagation delay method for minimizing the distance of the target generated by the radar electronic target generating device, characterized in that.

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