A method for detecting the radiation power of a multi-element phased array transmitting system

Abstract

The present application relates to the technical field of phased array transmitting system detection, and particularly relates to a detection method for the radiation power of a multi-array element phased array transmitting system, comprising: connecting each output channel of the phased array transmitting system and obtaining the output signal thereof, and performing amplitude attenuation processing on each output signal; performing synthesis processing on the attenuated output signal, and calculating the radiation power of the synthesized signal, so as to obtain the equivalent radiation power of the phased array transmitting system. The present application improves the test method from the perspective of improving the test efficiency and test safety of the super-power and multi-array element phased array transmitting system, and solves the problems of low test efficiency, limited test resources, and safety hazards caused by high-power radiation during testing, such as radiation of personnel and burning of equipment, and can meet the efficient and safe testing under the laboratory desktop environment conditions.

Description

Technical Field

[0001] This invention relates to the field of phased array transmission system testing technology, and specifically to a method for detecting the radiated power of a multi-element phased array transmission system. Background Technology

[0002] Phased array technology is now widely used in weaponry, enabling ultra-high power output from launch systems. This also presents new challenges for testing these systems. When testing high-power launch systems, we typically focus on indicators such as radiation pattern, beam pointing error, beamwidth, and effective radiated power (ERP). Indicators like radiation pattern, beam pointing error, and beamwidth can be tested by controlling the system in low-power radiation mode. However, ERP requires the system to be at full power, but ultra-high-power microwave signals can cause harm to personnel and electronic equipment.

[0003] Currently, when testing the equivalent radiated power (ERP) of phased array transmission systems, two methods are commonly used: space radiation and desktop injection. While the space radiation method can accurately measure the ERP, it has certain requirements for the test site. A free-space test field that meets the far-field conditions of the antenna must be found, specifically a microwave anechoic chamber whose size matches the far-field distance of the phased array antenna. This testing method often suffers from anechoic chamber resource conflicts, lengthy preparation periods, and low testing efficiency. The desktop injection method can also calculate the equivalent ERP of the system, but for ultra-high-power phased array transmission systems with numerous channels, injecting power channel by channel is not only time-consuming but also carries a high risk of component burnout.

[0004] It is evident that the current methods for detecting the radiated power of phased array transmission systems still have room for improvement. The convenience, accuracy, and safety of the detection methods need to be enhanced. Therefore, more reasonable technical solutions are needed to address the technical problems existing in the current technology. Summary of the Invention

[0005] To overcome at least one of the aforementioned defects, this invention proposes a method for detecting the radiated power of a multi-element phased array transmitting system. This method detects and determines the equivalent radiated power of a high-power phased array transmitting system, improving the convenience of detection while effectively enhancing the accuracy of the detection results and the safety of the detection process.

[0006] To achieve the above objectives, the detection method disclosed in this invention can adopt the following technical solution:

[0007] A method for detecting the radiated power of a multi-element phased array transmitting system, comprising:

[0008] Connect each output channel of the phased array transmitting system and acquire its output signal, and attenuate the amplitude of each output signal;

[0009] The attenuated output signal is synthesized, and the radiated power of the synthesized signal is calculated, thereby obtaining the equivalent radiated power of the phased array transmission system.

[0010] The aforementioned method for detecting radiated power involves attenuating the amplitude of multiple output signals and synthesizing them into a single composite signal. By measuring the radiated power of the composite signal, the equivalent radiated power of the transmitting system can be calculated. This method is convenient to use, provides accurate and reliable detection results, and avoids the harm to the human body caused by high-power radiation, thus improving safety.

[0011] Furthermore, in this invention, various methods can be used to attenuate the amplitude of the output signal, and the specific method is not limited to one. Here, we optimize and provide one feasible option: each output channel is equipped with an independent attenuator, and the amplitude of each output signal is attenuated through the attenuator. When using this method, proportional attenuation can be set, which facilitates the subsequent calculation of equivalent radiated power.

[0012] Furthermore, in this invention, for a transmitting system with a large number of output signals, signal synthesis is employed to improve the calculation efficiency of radiated power. Various signal synthesis methods can be used, and there is no single, limited approach. Here, we optimize the approach and provide one feasible option: During signal synthesis, the output channels of the phased array transmitting system are partitioned. The output signals of each partition undergo initial synthesis processing. The signals from the initial synthesis processing are then processed several times to obtain the final synthesized signal. Using this approach, the final synthesized signal is only one. The equivalent radiated power of the transmitting system can be calculated simply by measuring the parameters of this synthesized signal, thereby greatly improving detection efficiency.

[0013] Furthermore, the signal synthesis method can specifically adopt the following scheme: the output signal is first synthesized and then resynthesized using a power divider. When using this scheme, the appropriate power divider can be selected for signal synthesis depending on the number of output signal splits.

[0014] Furthermore, in this invention, to maintain the amplitude and phase consistency of the output signal, an optimization is made, and one feasible option is to attenuate the output signal, transmit it in an equal-phase cable for initial synthesis, and then perform a second synthesis after transmission through the equal-phase cable. This approach avoids amplitude and phase changes in the output signal during transmission in the equal-phase cable, thereby maximizing the accuracy of the detection results.

[0015] Furthermore, in this invention, the signal undergoes multi-stage processing, and the output signal is synthesized. The amplitude and phase characteristics of the synthesized signal are determined as follows:

[0016] PA = PA1 + PA2 + ... + PA n

[0017] Where PA represents the amplitude characteristic of the synthesized signal, PA n The amplitude characteristics of the transmission devices and cables for the output signal to be synthesized;

[0018]

[0019] in, The phase characteristics of the synthesized signal, The phase characteristics of the transmission device and cable for the output signal to be synthesized.

[0020] Furthermore, there is a certain degree of error in the measurement of signal parameters. Due to the influence of the equipment, the detected signal parameters may vary significantly. Therefore, adjustments are needed to ensure the accuracy of the detection results. The specific method is not limited to one method; here, we optimize the process and provide one feasible option: perform several data detections and collections to determine the most frequently occurring PA value and... The value is used as a reference value, and the PA value whose error exceeds the set value is... The value is determined as an error value, and the electrical length of the transmission channel corresponding to the error value is adjusted to reduce the error to within the set value.

[0021] Furthermore, the transmission propagation link of the output signal of the transmitting system in this invention includes an antenna array, an injection device, a test cable, and a spectrum analyzer connected in sequence. In this configuration, the antenna array is part of the transmitting system and is used to transmit the output signal; the injection device is used to inject the output signal into a designated device for subsequent processing and testing; the test cable is used to transmit the signal; and the spectrum analyzer is used to detect the radiated power.

[0022] Furthermore, based on the aforementioned disclosed transmission propagation link, the equivalent radiated power described in this invention is calculated using the following method:

[0023] ERP = P t Gt

[0024] Where ERP is the equivalent radiated power of the transmitting system, P t For transmission power, G t This represents the antenna gain.

[0025] Furthermore, to refine the calculation method, the following feasible approach can be adopted: monitor the radiated power of the synthesized signal using a spectrum analyzer, and calculate the equivalent radiated power of the transmitting system as follows:

[0026]

[0027] Wherein, ERP is the equivalent radiated power of the transmitting system, P1 is the power reading measured by the spectrum analyzer in the injection mode, in dBm; L1 is the insertion loss of the injection device, in dB; L2 is the insertion loss of the test cable from the injection device to the spectrum analyzer, in dB; and G1 is the gain of the antenna array replaced in situ by the tested device in the transmitting system, in dB.

[0028] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this invention include:

[0029] The invention improves the testing method from the perspective of enhancing the testing efficiency and safety of ultra-high power, multi-element phased array transmission systems. The proposed testing method solves the problems of low testing efficiency of equivalent radiated power of ultra-high power phased array transmission systems, limited testing resources, and safety hazards such as personnel radiation and equipment burnout caused by high power radiation during testing. It can meet the requirements of efficient and safe testing under laboratory desktop environment conditions. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram illustrating the principle of signal processing in the example. Detailed Implementation

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0033] In view of the problems of inaccurate radiation power detection or inconvenient detection operation in existing phased array transmission systems, as well as the certain personnel safety issues, the following embodiments are optimized to overcome the defects of the prior art.

[0034] Example

[0035] This embodiment provides a method for detecting the radiated power of a multi-element phased array transmitting system, including:

[0036] Connect each output channel of the phased array transmitting system and acquire its output signal, and attenuate the amplitude of each output signal;

[0037] The attenuated output signal is synthesized, and the radiated power of the synthesized signal is calculated, thereby obtaining the equivalent radiated power of the phased array transmission system.

[0038] The radiation power detection method disclosed in this embodiment performs amplitude attenuation processing on multiple output signals and performs signal synthesis processing to combine a large number of output signals into a single composite signal. By measuring the radiation power of the composite signal, the equivalent radiation power of the transmitting system can be calculated. This method is convenient to use, the detection results are accurate and reliable, and it avoids the harm to the human body caused by high-power radiation, thus improving safety.

[0039] In this embodiment, multiple methods can be used to attenuate the amplitude of the output signal, and the specific method is not limited to one. Here, we optimize and adopt one feasible option: each output channel is equipped with an independent attenuator, and the amplitude of each output signal is attenuated through the attenuator. When using this method, proportional attenuation can be set, which facilitates the subsequent calculation of equivalent radiated power.

[0040] In this embodiment, for a transmitting system with a large number of output signals, signal synthesis is employed to improve the calculation efficiency of radiated power. Various signal synthesis methods can be used, and there is no single, limited approach. Here, we optimize and adopt one feasible option: during signal synthesis, the output channels of the phased array transmitting system are partitioned. The output signals of each partition undergo initial synthesis processing. The signals after the initial synthesis processing are then processed several times to obtain the final synthesized signal. Using this approach, the final synthesized signal is only one. The equivalent radiated power of the transmitting system can be calculated simply by measuring the parameters of this synthesized signal, thereby greatly improving detection efficiency.

[0041] Preferably, the signal synthesis method can be specifically implemented as follows: the output signal is first synthesized and then resynthesized using a power divider. When using this method, the appropriate power divider can be selected for signal synthesis depending on the number of output signal splits.

[0042] In this embodiment, to maintain the amplitude and phase consistency of the output signal, an optimization is performed, employing one feasible option: the output signal is attenuated, transmitted through an equal-phase cable for initial synthesis, and then re-synthesized after transmission through the equal-phase cable. This approach avoids amplitude and phase changes in the output signal during transmission through the equal-phase cable, thereby maximizing the accuracy of the detection results.

[0043] In this embodiment, the signal undergoes multi-stage processing. After the output signal is synthesized, the amplitude and phase characteristics of the synthesized signal are determined as follows:

[0044] PA = PA1 + PA2 + ... + PA n

[0045] Where PA represents the amplitude characteristic of the synthesized signal, PA n The amplitude characteristics of the transmission devices and cables for the output signal to be synthesized;

[0046]

[0047] in, The phase characteristics of the synthesized signal, The phase characteristics of the transmission device and cable for the output signal to be synthesized.

[0048] The measurement of signal parameters is subject to certain errors. Due to equipment limitations, the detected signal parameters may vary significantly. Therefore, adjustments are necessary to ensure the accuracy of the test results. The specific method is not limited to one method; here, we optimize and adopt one feasible option: perform several data detections and collections to determine the most frequently occurring PA value and... The value is used as a reference value, and the PA value whose error exceeds the set value is... The value is determined as an error value, and the electrical length of the transmission channel corresponding to the error value is adjusted to reduce the error to within the set value.

[0049] Preferably, in this embodiment, the transmission propagation link of the output signal of the transmitting system includes an antenna array, an injection device, a test cable, and a spectrum analyzer connected in sequence. In this configuration, the antenna array is part of the transmitting system and is used to transmit the output signal; the injection device is used to inject the output signal into a designated device for subsequent processing and testing; the test cable is used to transmit the signal; and the spectrum analyzer is used to detect the radiated power.

[0050] Specifically, based on the disclosed transmission propagation link, the equivalent radiated power in this embodiment is calculated using the following method:

[0051] ERP = P t G t

[0052] Where ERP is the equivalent radiated power of the transmitting system, P t For transmission power, G t This represents the antenna gain.

[0053] Furthermore, to refine the calculation method, the following feasible approach can be adopted: monitor the radiated power of the synthesized signal using a spectrum analyzer, and calculate the equivalent radiated power of the transmitting system as follows:

[0054]

[0055] Wherein, ERP is the equivalent radiated power of the transmitting system, P1 is the power reading measured by the spectrum analyzer in the injection mode, in dBm; L1 is the insertion loss of the injection device, in dB; L2 is the insertion loss of the test cable from the injection device to the spectrum analyzer, in dB; and G1 is the gain of the antenna array replaced in situ by the tested device in the transmitting system, in dB.

[0056] Using the publicly disclosed testing methods described above, an example is provided here to illustrate the testing effectiveness.

[0057] like Figure 1 As shown, during the testing of a high-power interference transmission system in a certain project, the testing method based on the injection-type test fixture of this embodiment was adopted. First, a 128-channel test fixture was designed as the injection point for the output signal. This test fixture consists of 128 coaxial attenuators, one 4-channel power divider, four 32-channel power dividers, four equal-length in-phase cables, 128 equal-length in-phase cables, and some structural mounting components. By adjusting the phase and amplitude of each channel cable, the amplitude and phase characteristics of the entire channel were corrected, ensuring that the amplitude consistency among the 128 channels of the fixture reached ±2dB, and the phase consistency reached ±10°, meeting the expected performance requirements.

[0058] The coaxial attenuator is connected to one output signal channel, and the 128 output signals are combined into four signals by four 32-channel power dividers. Then, the signals are combined into one signal by four power dividers for subsequent detection.

[0059] The test fixture was then used to test the high-power jamming transmission system. When the system radiated at full power, the output signal power after passing through the test fixture did not exceed 100mW, ensuring the safety of desktop testing. Its testing efficiency was improved by more than 80% compared to conventional ERP testing in an anechoic chamber. Combined with the formula for calculating the equivalent radiated power of injection testing, efficient, safe, and accurate testing of the equivalent radiated power (ERP) of high-power jamming transmission systems was achieved.

[0060] The above are the embodiments listed in this example. However, this example is not limited to the optional embodiments described above. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can derive other various forms of embodiments based on the teachings of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example. The scope of protection of this example should be defined in the claims.

Claims

1. A method for detecting the radiated power of a multi-element phased array transmitting system, characterized in that, include: Connect each output channel of the phased array transmitting system and acquire its output signal, and attenuate the amplitude of each output signal; The attenuated output signal is synthesized and the radiated power of the synthesized signal is calculated, thereby obtaining the equivalent radiated power of the phased array transmission system. During signal synthesis, the output channels of the phased array transmitting system are divided into partitions. The output signal of each partition undergoes initial synthesis processing. The signal after the initial synthesis processing is then processed several times to obtain the final synthesized signal. The output signal is first synthesized and then resynthesized using a power divider. After the output signal is attenuated, it is transmitted in a phase-equal cable and undergoes initial synthesis processing, and then undergoes secondary synthesis processing after transmission through the phase-equal cable.

2. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 1, characterized in that: Each output channel is equipped with an independent attenuator, which attenuates the amplitude of each output signal.

3. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 1, characterized in that, After the output signal is synthesized, the amplitude and phase characteristics of the synthesized signal are determined as follows: in, For the amplitude characteristics of the synthesized signal, The amplitude characteristics of the transmission devices and cables for the output signal to be synthesized; in, For the phase characteristics of the synthesized signal, The phase characteristics of the transmission device and cable for the output signal to be synthesized.

4. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 3, characterized in that: Several data tests and collections were conducted to identify the most frequent occurrences. Value and The value is used as a baseline value, and any error exceeding the set value will be recorded. Value and The value is determined as an error value, and the electrical length of the transmission channel corresponding to the error value is adjusted to reduce the error to within the set value.

5. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 3 or 4, characterized in that: The transmission propagation link of the output signal of the transmission system includes an antenna array, an injection device, a test cable, and a spectrum analyzer connected in sequence.

6. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 5, characterized in that, The equivalent radiated power is calculated as follows: in, This represents the equivalent radiated power of the transmitting system. For transmission power, This represents the antenna gain.

7. The method for detecting the radiated power of a multi-element phased array transmitting system according to claim 6, characterized in that, The radiated power of the synthesized signal is monitored using a spectrum analyzer, and the equivalent radiated power of the transmitting system is calculated as follows: in, This represents the equivalent radiated power of the transmitting system. The power reading measured by the spectrum analyzer in injection mode, in dBm; Insertion loss of injection devices, in dB; Insertion loss of the test cable from the injection device to the spectrum analyzer, in dB; This represents the gain of the antenna array replaced in situ by the tested device in the transmission system, expressed in dB.

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