Method and system for measuring equivalent RCS (Radar Cross Section) of indoor active forwarding type target

Abstract

The invention provides a method and system for measuring the equivalent RCS of an indoor active forwarding target, and the method comprises the steps: determining the test time delay of a test transmitting pulse and a test receiving pulse according to the first time delay of the active forwarding target and the second time delay of a calibration body; determining a target pulse parameter of the active forwarding target based on the pulse parameter of the calibration body; in the test area of the compact range, the target pulse parameter and the test time delay are adopted to test the active forwarding target, and target echo power is obtained; testing the calibration body by adopting the pulse parameter and the second time delay to obtain calibration body echo power; and determining a target RCS value of the active forwarding target according to the target echo power, the calibration body echo power and the RCS value of the calibration body. According to the scheme, the equivalent RCS measurement can be carried out on the active forwarding target under the indoor condition.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic scattering technology, in particular to the field of RCS testing technology, and in particular to a method and system for measuring the equivalent RCS of an indoor active forwarding target. Background Art

[0002] Compact microwave anechoic chambers are the primary venue for conducting indoor radar cross-section (RCS) measurements. Typically, the targets being measured are passive, but with the continuous advancement of technology, an increasing number of active targets are also requiring RCS testing. Traditional indoor RCS testing methods primarily utilize time-sharing relative calibration, ensuring that test system parameters such as frequency, polarization, and transmit power remain constant. Calibration objects with known RCS values ​​and the target being measured are placed within the test area, and the power ratio between the two is used to calculate the target's accurate RCS. However, due to the significant time delay effects often associated with active forwarding targets, the distance between the target echo and the calibration object is inconsistent, rendering the existing range gate technology unusable and rendering the traditional calibration method ineffective. Summary of the Invention

[0003] The embodiment of the present invention provides a method and system for measuring the equivalent RCS of indoor active forwarding targets. This solution solves the problem that traditional measurement methods cannot accurately measure high-latency active forwarding targets, and realizes accurate measurement of the equivalent RCS of active forwarding targets.

[0004] In a first aspect, an embodiment of the present invention provides a method for measuring an equivalent RCS of an indoor active forwarding target, including:

[0005] Determining the test delay of the test transmission pulse and the test reception pulse according to the first delay of the active forwarding type target and the second delay of the calibration body;

[0006] Determining target pulse parameters of the active forwarding target based on the pulse parameters of the calibration object;

[0007] In a test area of ​​a compact field, the active forwarding target is tested using the target pulse parameters and the test delay to obtain a target echo power; and the calibration object is tested using the pulse parameters and the second delay to obtain a calibration object echo power;

[0008] The target RCS value of the active forwarding target is determined according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

[0009] Optionally, the test delay is the sum of the first delay and the second delay.

[0010] Optionally, determining the target pulse parameter of the active forwarding target based on the pulse parameter of the calibration object includes:

[0011] Acquiring a calibration transmission pulse width, a calibration reception pulse width, and a calibration pulse period of the calibration body;

[0012] Obtaining the start time of the transmission pulse and the end time of the reception pulse of the active forwarding target to determine the test pulse period of the active forwarding target;

[0013] Calculating a test transmit pulse width according to the calibration transmit pulse width, the calibration pulse period, and the test pulse period;

[0014] The test reception pulse width is calculated based on the calibration reception pulse width, the calibration pulse period and the test pulse period; wherein the target pulse parameters include the test transmission pulse width and the test reception pulse width.

[0015] Optionally, obtaining the start time of a transmission pulse and the end time of a reception pulse of the active forwarding target to determine a test pulse period of the active forwarding target includes:

[0016] The duration from the start time of the transmitting pulse to the end time of the receiving pulse is determined as the test pulse period.

[0017] Optionally, obtaining the start time of a transmission pulse and the end time of a reception pulse of the active forwarding target to determine a test pulse period of the active forwarding target includes:

[0018] The test pulse period is calculated according to the start time of the transmitting pulse, the end time of the receiving pulse, and the calibration pulse period of the calibration body;

[0019] The test pulse period is determined by the following formula:

[0020]

[0021] Among them, T c is the test pulse period; T0 is the calibration pulse period; t1 and t2 are the start time of the transmitting pulse and the end time of the receiving pulse respectively.

[0022] Optionally, determining the target RCS value of the active forwarding target according to the target echo power, the calibration body echo power, and the RCS value of the calibration body includes:

[0023] Calculating a ratio of an RCS value of the calibration object to an echo power of the calibration object;

[0024] The product of the ratio and the target echo power is used as the target RCS value.

[0025] In a second aspect, an embodiment of the present invention further provides a system for measuring an equivalent RCS of an indoor active forwarding target, including:

[0026] An acquisition module, configured to acquire a first delay of an active forwarding target and a second delay of a calibration object, and determine a test delay of a test transmitting pulse and a test receiving pulse;

[0027] a parameter determination module, configured to determine a target pulse parameter of the active forwarding target based on the pulse parameter of the calibration object;

[0028] a power acquisition module, configured to acquire a target echo power obtained when the test device uses the target pulse parameters and the test delay to test the active forwarding target, and a calibration body echo power of the calibration body obtained when the calibration body is tested using the pulse parameters and the second delay;

[0029] The RCS determination module is configured to determine a target RCS value of the active forwarding target according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

[0030] Optionally, the test device includes a vector network analyzer, a transmitting hardware gating switch, a receiving hardware gating switch, a pulse source, a power amplifier, a low noise amplifier, a receiving feed source, a transmitting feed source and a compact field.

[0031] Optionally, the pulse source is connected to the transmitting hardware gating switch and the receiving hardware gating switch respectively;

[0032] The output end of the vector network analyzer is connected to the transmitting hardware selection switch, the power amplifier and the transmitting feed source in sequence;

[0033] The receiving end of the vector network analyzer is connected to the receiving hardware selection switch, the low noise amplifier and the receiving feed source in sequence.

[0034] Optionally, the duty cycle of the emission pulse of the pulse source is higher than 10%.

[0035] In a third aspect, an embodiment of the present invention further provides a computing device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in any first aspect of this specification is implemented.

[0036] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to execute the method described in any one of the first aspects of this specification.

[0037] In a fifth aspect, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of the method described in any first aspect of this specification.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention provides a method for measuring the equivalent RCS of an indoor active forwarding target. The method first determines the delay of the active forwarding target, and then obtains a test delay based on the delay and the delay of a calibration body, thereby determining the duration between a transmitted pulse and a received pulse when testing the active forwarding target. Then, by fixing the pulse duty ratio of the calibration body and the active forwarding target during the test, the target pulse parameters of the active forwarding target are obtained, achieving equivalent power output and reception. Therefore, the method can accurately measure the equivalent RCS of the active forwarding target without changing the traditional darkroom layout and test system, thus solving the problems of difficult clutter control and reduced power level caused by high delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is a flow chart of a method for measuring the equivalent RCS of an indoor active forwarding target provided by one embodiment of the present invention;

[0042] Figure 2 is a pulse schematic diagram provided by an embodiment of the present invention;

[0043] Figure 3 is a schematic structural diagram of a measuring device provided by one embodiment of the present invention;

[0044] Figure 4 This is a hardware architecture diagram of a computing device provided by one embodiment of the present invention;

[0045] Figure 5 1 is a schematic diagram of a system for measuring the equivalent RCS of an indoor active forwarding target provided by one embodiment of the present invention;

[0046] Reference numerals: 301 - vector network analyzer; 302 - transmit hardware selection switch; 303 - pulse source; 304 - power amplifier; 305 - transmit feed; 306 - receive hardware selection switch; 307 - low noise amplifier; 308 - receive feed. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] The following is the concept of the present invention: Figure 1 As shown, an embodiment of the present invention provides a method for measuring the equivalent RCS of an indoor active forwarding target, including:

[0049] Step 100, determining the test delay of the test transmission pulse and the test reception pulse according to the first delay of the active forwarding class target and the second delay of the calibration body;

[0050] Step 102, determining target pulse parameters of an active forwarding target based on the pulse parameters of the calibration object;

[0051] Step 104: In the test area of ​​the compact range, the active forwarding target is tested using the target pulse parameters and the test delay to obtain the target echo power; the calibration object is tested using the pulse parameters and the second delay to obtain the calibration object echo power;

[0052] Step 106: Determine the target RCS value of the active forwarding target according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

[0053] In an embodiment of the present invention, the delay of an active forwarding target is first determined, and a test delay is derived based on this delay and the delay of a calibration body. This determines the duration between the transmitted pulse and the received pulse when testing the active forwarding target. Then, by fixing the pulse duty cycle of the calibration body and the active forwarding target during the test, the target pulse parameters of the active forwarding target are derived, achieving equivalent power output and reception. Therefore, accurate measurement of the equivalent RCS of the active forwarding target can be achieved without changing the traditional darkroom layout and test system, solving problems such as difficulty in controlling clutter and reduced power levels caused by high delay.

[0054] It should be noted that the active forwarding target referred to in the present invention is a target that first passively receives an external signal and then transmits the signal, which is different from an active target that actively sends a signal.

[0055] Described below Figure 1 How to perform the steps shown.

[0056] In a preferred embodiment, the test delay is the sum of the first delay and the second delay.

[0057] In a preferred embodiment, step 102, determining target pulse parameters of an active forwarding target based on pulse parameters of a calibration object, includes:

[0058] Acquire the calibration transmission pulse width, calibration reception pulse width and calibration pulse period of the calibration body;

[0059] Obtain the start time of the transmit pulse and the end time of the receive pulse of the active forwarding target to determine the test pulse period of the active forwarding target;

[0060] The test emission pulse width is calculated based on the calibration emission pulse width, the calibration pulse period and the test pulse period;

[0061] The test receiving pulse width is calculated based on the calibration receiving pulse width, the calibration pulse period and the test pulse period; wherein the target pulse parameters include the test transmitting pulse width and the test receiving pulse width.

[0062] It should be noted that during conventional RCS testing, pulse parameters are determined based on the quiet zone size, chamber size, and the positional relationship between the target and the transmitting and receiving antennas, and are generally fixed. When performing calibration tests, the parameter settings remain the same as for conventional RCS testing.

[0063] Specifically, to ensure that the duty cycles of the calibration entity and the active forwarding target are consistent, the following equation holds: test transmit pulse width / test pulse period = calibration transmit pulse width / calibration pulse period, and test receive pulse width / test pulse period = calibration receive pulse width / calibration pulse period. Therefore, test transmit pulse width = calibration transmit pulse width / calibration pulse period × test pulse period, and test receive pulse width = calibration receive pulse width / calibration pulse period × test pulse period. It should be noted that test pulse period > calibration pulse period.

[0064] In the present invention, since the duty cycle is the ratio of the transmitted pulse width to the pulse period, it affects the average power of the radar. If the duty cycles of the two test pulses are different, even if the peak power is the same, the average power will be different. Moreover, the average power directly affects the intensity of the target echo signal. Therefore, by fixing the duty cycle, the average power of the two pulses can be ensured to be consistent, so that the echo signal strength is determined only by the target scattering characteristics (rather than the transmitted energy), thereby improving the accuracy of the equivalent RCS of active forwarding targets.

[0065] In a preferred embodiment, obtaining the start time of a transmit pulse and the end time of a receive pulse of an active forwarding target to determine a test pulse period of the active forwarding target includes:

[0066] The duration from the start time of the transmitting pulse to the end time of the receiving pulse is determined as the test pulse period.

[0067] In a preferred embodiment, obtaining the start time of a transmit pulse and the end time of a receive pulse of an active forwarding target to determine a test pulse period of the active forwarding target includes:

[0068] The test pulse period is calculated based on the start time of the transmitting pulse, the end time of the receiving pulse and the calibration pulse period of the calibration body;

[0069] The test pulse period is determined by the following formula:

[0070]

[0071] Among them, T c is the test pulse period; T0 is the calibration pulse period; t1 and t2 are the start time of the transmitted pulse and the end time of the received pulse, respectively. It should be noted that int() is a rounding function.

[0072] For example, Figure 2 The pulse diagram shown in the figure is, from top to bottom, a schematic diagram of the transmitting pulse during the calibration body test, a schematic diagram of the receiving pulse during the calibration body test, a schematic diagram of the transmitting pulse during the active forwarding target test, and a schematic diagram of the receiving pulse during the active forwarding target test. Figure 2 In the example, the actual time from the start time of the transmitting pulse to the end time of the receiving pulse of the active forwarding target is greater than 3 times the calibration pulse period but less than 4 times the calibration pulse period. In order to synchronize the pulse period of the calibration object and the test target as much as possible and further reduce the RCS error of the active forwarding target, Figure 2 The test pulse period is set to 4 times the calibration pulse period. This can synchronize the pulse periods of the calibration body and the active forwarding target as a whole, and improve the accuracy of the equivalent RCS of the active forwarding target.

[0073] In step 104, the Figure 3 The test is performed using the test apparatus shown, which includes a vector network analyzer 301, a transmit hardware selection switch 302, a pulse source 303, a power amplifier 304, a transmit feed 305, a receive hardware selection switch 306, a low noise amplifier 307, a receive feed 308 and a compact field.

[0074] In a preferred embodiment, Figure 3 As shown, the pulse source 303 is connected to the transmitting hardware gating switch 302 and the receiving hardware gating switch 306 respectively;

[0075] The output end of the vector network analyzer 301 is connected to the transmitting hardware selection switch 302, the power amplifier 304 and the transmitting feed source 305 in sequence;

[0076] The receiving end of the vector network analyzer 301 is connected to the receiving hardware selection switch 306 , the low noise amplifier 307 and the receiving feed source 308 in sequence.

[0077] Specifically, the output of the vector network analyzer is sequentially connected to a transmit hardware gating switch, a power amplifier, and a transmit feed. The transmit signal is modulated by the hardware gating switch, amplified by the power amplifier, and then radiated into the compact field anechoic chamber via the transmit feed. The receive end of the vector network analyzer is connected to a receive hardware gating switch, a low-noise amplifier, and a receive feed. The receive signal passes through the receive feed, is amplified by the low-noise amplifier, enters the receive hardware gating switch, is modulated, and is received by the vector network analyzer.

[0078] In a preferred embodiment, the duty cycle of the emission pulses of the pulse source 303 is higher than 10%.

[0079] In a preferred embodiment, in step 106, determining the target RCS value of the active forwarding target based on the target echo power, the calibration body echo power, and the calibration body RCS value includes:

[0080] Calculate the ratio of the RCS value of the calibration body to the echo power of the calibration body;

[0081] The product of the ratio and the target echo power is taken as the target RCS value.

[0082] Specifically, target RCS value=RCS value of calibration volume×target echo power / calibration volume echo power.

[0083] like Figure 4 、 Figure 5As shown, the embodiment of the present invention provides a system for measuring the equivalent RCS of indoor active forwarding targets. The system embodiment can be implemented by software, hardware, or a combination of software and hardware. From the hardware level, Figure 4 As shown in the figure, a hardware architecture diagram of a computing device where a measurement system of an indoor active forwarding class target equivalent RCS is located is provided in an embodiment of the present invention. Figure 4 In addition to the processor, memory, network interface, and non-volatile memory shown, the computing device where the system is located in the embodiment may also generally include other hardware, such as a forwarding chip responsible for processing messages, etc. Taking software implementation as an example, Figure 5 As shown, as a logical system, the CPU of the computing device reads the corresponding computer program in the non-volatile memory into the internal memory and runs it. This embodiment provides a measurement system for the equivalent RCS of an indoor active forwarding target, including:

[0084] An acquisition module 500 is configured to acquire a first delay of an active forwarding target and a second delay of a calibration object, and determine a test delay of a test transmit pulse and a test receive pulse;

[0085] A parameter determination module 502 is configured to determine a target pulse parameter of an active forwarding target based on the pulse parameter of the calibration object;

[0086] The power acquisition module 504 is configured to acquire the target echo power obtained when the test device uses the target pulse parameters and the test delay to test the active forwarding target, and the calibration body echo power obtained when the test device uses the pulse parameters and the second delay to test the calibration body;

[0087] The RCS determination module 506 is configured to determine a target RCS value of an active forwarding target according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

[0088] In some specific implementations, the acquisition module 500 may be used to perform the above step 100, the parameter determination module 502 may be used to perform the above step 102, and the RCS determination module 506 may be used to perform the above step 106. Figure 3 shown.

[0089] The content of the above system is based on the same concept as the embodiment of the system of the present invention. For specific content, please refer to the description in the embodiment of the system of the present invention and will not be repeated here.

[0090] It should be understood that the structure illustrated in the embodiments of the present invention does not constitute a specific limitation on a system for measuring the equivalent RCS of an indoor active forwarding target. In other embodiments of the present invention, a system for measuring the equivalent RCS of an indoor active forwarding target may include more or fewer components than illustrated, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0091] The information interaction, execution process, etc. between the modules in the above system are based on the same concept as the embodiment of the method of the present invention. For specific contents, please refer to the description in the embodiment of the method of the present invention and will not be repeated here.

[0092] An embodiment of the present invention also provides a computing device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements a method for measuring the equivalent RCS of an indoor active forwarding type target in any embodiment of the present invention.

[0093] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor executes a method for measuring the equivalent RCS of an indoor active forwarding target in any embodiment of the present invention.

[0094] An embodiment of the present application also provides a computer program product, which includes a computer program. A processor of a computer device reads the computer program from a computer-readable storage medium, and the processor executes the computer program, so that the computer device performs a method for measuring the equivalent RCS of an indoor active forwarding target as described in any of the above embodiments.

[0095] Specifically, a system or device equipped with a storage medium can be provided, on which software program codes that implement the functions of any of the above-mentioned embodiments are stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program codes stored in the storage medium.

[0096] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute part of the present invention.

[0097] Examples of storage media for providing program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0098] In addition, it should be clear that the functions of any of the above embodiments can be achieved not only by executing the program code read by the computer, but also by enabling the operating system on the computer to complete part or all of the actual operations based on instructions of the program code.

[0099] In addition, it can be understood that the program code read from the storage medium is written into a memory provided in an expansion board inserted into the computer or into a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above embodiments.

[0100] It should be noted that, in this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical factors in the process, method, article or device comprising the elements.

[0101] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk, etc. Various media that can store program codes.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for measuring the equivalent RCS of an indoor active forwarding target, characterized in that: include: Determining the test delay of the test transmission pulse and the test reception pulse according to the first delay of the active forwarding type target and the second delay of the calibration body; Determining target pulse parameters of the active forwarding target based on the pulse parameters of the calibration object; In a test area of ​​a compact field, the active forwarding target is tested using the target pulse parameters and the test delay to obtain a target echo power; and the calibration object is tested using the pulse parameters and the second delay to obtain a calibration object echo power; The target RCS value of the active forwarding target is determined according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

2. The measuring method according to claim 1, wherein The test delay is the sum of the first delay and the second delay.

3. The measuring method according to claim 1, wherein The determining of the target pulse parameter of the active forwarding target based on the pulse parameter of the calibration object includes: Acquiring a calibration transmission pulse width, a calibration reception pulse width, and a calibration pulse period of the calibration body; Obtaining the start time of the transmission pulse and the end time of the reception pulse of the active forwarding target to determine the test pulse period of the active forwarding target; Calculating a test transmit pulse width according to the calibration transmit pulse width, the calibration pulse period, and the test pulse period; The test reception pulse width is calculated based on the calibration reception pulse width, the calibration pulse period and the test pulse period; wherein the target pulse parameters include the test transmission pulse width and the test reception pulse width.

4. The measuring method according to claim 3, characterized in that Obtaining the start time of the transmission pulse and the end time of the reception pulse of the active forwarding target to determine the test pulse period of the active forwarding target, including: The duration from the start time of the transmitting pulse to the end time of the receiving pulse is determined as the test pulse period.

5. The measuring method according to claim 3, characterized in that Obtaining the start time of the transmission pulse and the end time of the reception pulse of the active forwarding target to determine the test pulse period of the active forwarding target, including: The test pulse period is calculated according to the start time of the transmitting pulse, the end time of the receiving pulse, and the calibration pulse period of the calibration body; The test pulse period is determined by the following formula: Among them, T c is the test pulse period; T0 is the calibration pulse period; t1 and t2 are the start time of the transmitting pulse and the end time of the receiving pulse respectively.

6. The measuring method according to any one of claims 1 to 5, characterized in that: The determining, according to the target echo power, the calibration body echo power, and the RCS value of the calibration body, the target RCS value of the active forwarding target includes: Calculating a ratio of an RCS value of the calibration object to an echo power of the calibration object; The product of the ratio and the target echo power is used as the target RCS value.

7. A measurement system for equivalent RCS of indoor active forwarding targets, characterized by: include: An acquisition module, configured to acquire a first delay of an active forwarding target and a second delay of a calibration object, and determine a test delay of a test transmitting pulse and a test receiving pulse; a parameter determination module, configured to determine a target pulse parameter of the active forwarding target based on the pulse parameter of the calibration object; a power acquisition module, configured to acquire a target echo power obtained when the test device uses the target pulse parameters and the test delay to test the active forwarding target, and a calibration body echo power of the calibration body obtained when the calibration body is tested using the pulse parameters and the second delay; The RCS determination module is configured to determine a target RCS value of the active forwarding target according to the target echo power, the calibration body echo power, and the RCS value of the calibration body.

8. The measurement system according to claim 7, characterized in that The test device comprises a vector network analyzer, a transmitting hardware gating switch, a receiving hardware gating switch, a pulse source, a power amplifier, a low noise amplifier, a receiving feed source, a transmitting feed source and a compact field.

9. The measurement system according to claim 8, characterized in that The pulse source is connected to the transmitting hardware gating switch and the receiving hardware gating switch respectively; The output end of the vector network analyzer is connected to the transmitting hardware selection switch, the power amplifier and the transmitting feed source in sequence; The receiving end of the vector network analyzer is connected to the receiving hardware selection switch, the low noise amplifier and the receiving feed source in sequence.

10. The measuring system according to any one of claims 8 to 9, characterized in that The duty cycle of the emission pulse of the pulse source is higher than 10%.

Images