A digital T / R component with arbitrary weighting of transmission link amplitude and method thereof

Abstract

The present invention provides a digital T / R assembly and method for arbitrarily weighting the transmit chain amplitude. The transmit chain of the digital T / R assembly includes a local oscillator transmission and pre-excitation signal formation module, a pre-excitation signal amplification module, an intermediate frequency local oscillator generation module, and an excitation signal formation and transmission module. This solves the problem in existing digital array radar T / R assemblies where the transmit branch uses a saturated power amplifier (HPA) to amplify the excitation signal, resulting in distorted amplitude information and the inability to perform relevant amplitude modulation. The assembly features a simple structure and is easy to implement.

Description

Technical Field

[0001] The invention belongs to the field of digital array radar and relates to a digital T / R component with arbitrarily weighted transmission link amplitude and a method thereof. Background Art

[0002] Phased array radars that utilize digital beamforming (DBF) technology for both transmit and receive are called digital array radars. The core of these radars lies in the digital T / R module. Theoretically, the transmit and receive beams of a digital array radar should be capable of arbitrary amplitude and phase weighting. Currently, receive DBF technology is well established and widely used. To achieve high efficiency and high transmit peak power to achieve the radar's desired power, the transmit chain of a digital T / R module typically employs a high-power amplifier (HPA) to saturate the preceding excitation signal. Therefore, transmit DBF cannot achieve amplitude weighting, only phase weighting.

[0003] For some special-purpose radars, an adjustable digitally controlled attenuator is added to the HPA end, or the pre-excitation input signal is reduced at the HPA input to return the HPA to the linear region to achieve adjustable transmit signal amplitude. However, these two methods have significant disadvantages. The digitally controlled attenuator method has limited adjustable positions, making continuous amplitude adjustment difficult, and has significant limitations in applications such as low-sidelobe transmission or adaptive nulling. Because the HPA linear region is very narrow, the method of returning the HPA to the linear region to achieve linear amplification is difficult to maintain linear amplification, and the power amplifier efficiency is low. As a result, these two methods are difficult to popularize.

[0004] As modern warfare scenarios become increasingly complex, the demands placed on radars are becoming increasingly stringent. Not only are they required to have long-range, accurate, and versatile capabilities, but they are also required to be user-friendly and self-protective. Consequently, various targeted advanced technologies are constantly emerging, including advanced anti-interference and anti-clutter technologies such as low-acquisition interception, low-sidelobe transmit beams, and adaptive nulling of transmit beams. While the various advanced technologies described above are theoretically mature, their practical application is limited by radar design trade-offs, particularly those related to adaptive amplitude control in the transmit link. Even advanced digital array radars, due to their use of HPA for transmit power amplification, face challenges in their implementation. Summary of the Invention

[0005] To solve the problems existing in the prior art, the present invention provides a digital T / R component with arbitrarily weighted transmission link amplitude, wherein the transmission link includes a local oscillator transmission and pre-excitation signal formation module, a pre-excitation signal amplification module, an intermediate frequency local oscillator generation module, and an excitation signal formation and transmission module;

[0006] The intermediate frequency local oscillator generating module generates two phase-adjustable intermediate frequency signals and sends them to the local oscillator transmission and pre-excitation signal forming module;

[0007] The local oscillator transmission and pre-excitation signal forming module receives the local oscillator signal sent by the external frequency source, mixes the local oscillator signal with the two intermediate frequency signals from the intermediate frequency local oscillator generating module to form two first pre-excitation signals, and sends them to the pre-excitation signal amplification branch module;

[0008] The pre-excitation signal amplification module performs power amplification and filtering on the two first pre-excitation signals generated by the local oscillation transmission and pre-excitation signal formation module to generate two corresponding second pre-excitation signals and sends them to the excitation signal formation and transmission module;

[0009] The excitation signal generating and transmitting module performs power synthesis on the second pre-excitation signal to generate an excitation signal and sends the excitation signal to the antenna unit.

[0010] Furthermore, the pre-excitation signal amplification module includes a pre-excitation signal amplification branch A and a pre-excitation signal amplification branch B;

[0011] The hardware structures of the pre-excitation signal amplifying branch A and the pre-excitation signal amplifying branch B are exactly the same, including a pre-excitation amplifier, an HPA and a filter;

[0012] The first pre-excitation signal from the local oscillator transmission and pre-excitation signal formation module is processed in turn by the pre-excitation amplifier, HPA and filter in the pre-excitation signal amplification branch A and the pre-excitation signal amplification branch B to generate a second pre-excitation signal and send it to the excitation signal formation and transmission module.

[0013] Furthermore, the intermediate frequency local oscillator generation module includes two-way DDS modules and a DDS phase configuration module; the DDS phase configuration module generates wave control codes and various phase compensation coefficients and sends them to the two-way DDS modules for phase accumulation calculation to form the phase information of the intermediate frequency local oscillator output by the two-way DDS modules;

[0014] The various phase compensation coefficients include an array-level transmission phase compensation coefficient, a phase compensation coefficient of two amplification branches of a pre-excitation signal amplification module, and an amplitude phase compensation coefficient.

[0015] Furthermore, the DDS phase configuration module is a circuit with an FPGA chip as the core control unit, including a FLASH device, a system control and timing processing unit, a wave control code calculation unit, a channel phase compensation calculation unit, an array phase compensation calculation unit, a unit-level amplitude weight calculation unit, an array-level amplitude compensation calculation unit, an arc cosine calculation unit, and a negation calculation unit;

[0016] The amplitude-phase compensation coefficient includes a positive amplitude-phase compensation coefficient and a negative amplitude-phase compensation coefficient. The positive amplitude-phase compensation coefficient is obtained by multiplying the array-level amplitude compensation coefficient and the unit-level amplitude weighting coefficient and then taking the inverse cosine. The negative amplitude-phase compensation coefficient is obtained by inverting the positive amplitude-phase compensation coefficient.

[0017] Furthermore, the FLASH device includes pre-loaded position information of each channel of the digital T / R component on the array, channel-level phase compensation code, array-level phase compensation code, unit-level transmission amplitude weight and array-level amplitude compensation code.

[0018] Furthermore, the excitation signal forming and transmitting module includes an equal power combiner and a circulator;

[0019] The second pre-excitation signals from the two pre-excitation signal amplification branches A and B of the pre-excitation signal amplification module are power-added in an equal power combiner to generate an excitation signal, and the circulator sends the generated excitation signal to the antenna unit.

[0020] Furthermore, the local oscillator transmission and pre-excitation signal forming module includes a one-to-two power divider and a mixer.

[0021] A method for a digital T / R component with arbitrarily weighted amplitude in a transmission link is also provided. The design method is implemented based on any of the above-mentioned digital T / R components with arbitrarily weighted amplitude in a transmission link. The pre-excitation signal amplification module includes two pre-excitation signal amplification branches, and the gain of the HPA in each pre-excitation signal amplification branch remains consistent within an error range.

[0022] Furthermore, a phase reference model or a phase stability of a reference link for measuring the phases of two transmitting branches is provided; the two transmitting branches are specifically two circuit paths through which the local oscillator signal passes from the local oscillator transmission and pre-excitation signal generation module, the pre-excitation signal amplification module, the excitation signal formation and transmission module.

[0023] Compared with the prior art, the present invention has the following technical effects:

[0024] 1. The present invention solves the problem in existing digital array radars where the transmit chain of the digital T / R assembly uses an HPA to amplify the excitation signal, resulting in distorted amplitude information and the inability to perform relevant amplitude modulation. This problem prevents the implementation of a series of system-level technologies that digital array radars require using the amplitude information of the digital T / R assembly, such as low-sidelobe transmit beams, transmit beam adaptive nulling, and other anti-interference and anti-clutter technologies.

[0025] 2. The present invention only requires a simple improvement to the existing digital T / R component transmission chain. It only needs to add a DDS chip and a mixer, and add the corresponding transmission chain amplitude compensation and system-level amplitude weighting coefficient to the DDS phase configuration item in the FPGA. It can be realized. The structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the digital T / R component transmission link of an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the relationship between synthesizer loss and amplitude weight according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiments of the present application address the problem that a digital array radar transmission system has difficulty in achieving arbitrary weighting of the amplitude of the digital T / R component transmission chain due to the use of a high power amplifier (HPA), resulting in the inability to implement anti-interference technologies such as low sidelobe transmission beams and transmission beam adaptive nulling. A digital T / R component with arbitrary weighting of the transmission chain amplitude and a method thereof are proposed, which achieve arbitrary weighting of the amplitude of its transmission chain and provide the possibility for the application of anti-interference technologies such as low sidelobe transmission beams and transmission beam adaptive nulling in digital array radars.

[0029] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0030] As attached Figure 1 As shown, in an embodiment of the present application, a transmission link of a digital T / R component whose transmission link amplitude can be arbitrarily weighted involves three functional modules, including: a local oscillator transmission and pre-excitation signal forming module, a pre-excitation signal amplification module, an excitation signal forming and transmission module and an intermediate frequency local oscillator generation module; the local oscillator transmission and pre-excitation signal forming module includes a one-to-two power divider and a mixer.

[0031] The intermediate frequency local oscillator generating module generates two phase-adjustable intermediate frequency signals and sends them to the local oscillator transmission and pre-excitation signal forming module;

[0032] The local oscillator transmission and pre-excitation signal forming module receives the local oscillator signal sent by the external frequency source, mixes the local oscillator signal with the two intermediate frequency signals from the intermediate frequency local oscillator generating module to form two first pre-excitation signals, and sends them to the pre-excitation signal amplification branch module;

[0033] The pre-excitation signal amplification module performs power amplification and filtering on the first pre-excitation signal generated by the local oscillation transmission and pre-excitation signal formation module, generates two second pre-excitation signals and sends them to the excitation signal formation and transmission module;

[0034] The excitation signal generation and transmission module performs power synthesis on the second pre-excitation signal to generate an excitation signal and sends the excitation signal to the antenna unit for transmission.

[0035] The intermediate frequency local oscillator generation module includes a DDS phase configuration module and a DDS module. The DDS phase configuration module generates a wave control code for forming a beam pointing direction ( ), array-level emission phase compensation coefficient ( ), the phase compensation coefficient of the two amplification branches of the pre-excitation signal amplification module ( 、 ), amplitude phase compensation coefficient ( , ).

[0036] The amplitude phase compensation coefficient includes a positive amplitude phase compensation coefficient ( ) and the negative amplitude phase compensation coefficient ( ), the positive amplitude phase compensation coefficient is obtained by multiplying the array-level amplitude compensation coefficient and the unit-level amplitude weighting coefficient and then taking the inverse cosine, and the negative amplitude phase compensation coefficient is obtained by inverting the positive amplitude phase compensation coefficient.

[0037] The DDS phase configuration module sends the wave control code and each phase compensation coefficient (including the array-level transmission phase compensation coefficient, the phase compensation coefficient of the two amplification branches of the pre-excitation signal amplification module, and the amplitude phase compensation coefficient) to the phase accumulation calculation module of the DDS module to add the addition result. The addition result is the phase information of the intermediate frequency local oscillator signal output by the DDS module. The DDS phase configuration module sends the addition result to the local oscillator transmission and pre-excitation signal formation module, which mixes it with the local oscillator signal to form the phase information of the pre-excitation signal.

[0038] The pre-excitation signal amplification module includes a pre-excitation signal amplification branch A and a pre-excitation signal amplification branch B. The hardware structures of the pre-excitation signal amplification branch A and the pre-excitation signal amplification branch B are exactly the same, including a pre-excitation amplifier, an HPA and a filter.

[0039] The first pre-excitation signal from the local oscillator transmission and pre-excitation signal formation module is processed in turn by the pre-excitation amplifier, HPA and filter in the pre-excitation signal amplification branch A and the pre-excitation signal amplification branch B to generate a second pre-excitation signal and send it to the excitation signal formation and transmission module.

[0040] The excitation signal forming and transmitting module includes a synthesizer and a circulator. The second pre-excitation signal from the two pre-excitation signal amplification branches A and pre-excitation signal amplification branch B of the pre-excitation signal amplification module is power-added in the equal power synthesizer to generate an excitation signal, and the circulator sends the generated excitation signal to the antenna unit.

[0041] The DDS phase configuration module is composed of a computing circuit with an FPGA chip as the core, including a FLASH device, a system control and timing processing unit, a wave control code calculation unit, a channel phase compensation calculation unit, an array phase compensation calculation unit, a unit-level amplitude weight calculation unit, an array-level amplitude compensation calculation unit, an arc cosine calculation unit, and a negation calculation unit.

[0042] This embodiment also provides a method for a digital T / R component with arbitrary weighting of the transmit link amplitude. The implementation of the method involves the following specific points:

[0043] 1. HPA module selection: The gains of the two HPA modules of the pre-excitation signal amplifier module should be kept consistent as much as possible.

[0044] 2. Synthesizer selection: It involves arbitrary weighting of the transmission link amplitude, and the heat dissipation problem during signal synthesis needs to be considered. The system transmission weight setting should be considered together with the synthesizer's power resistance (such as Figure 2 shown).

[0045] 3. When debugging the transmission link of the digital T / R component mentioned above, ensure that the phase reference model or reference link phase used to measure the phase of the two transmission branches A and B (from the input signal Sin of the local oscillator transmission and pre-excitation signal generation module to the excitation signal formation and the output Sout of the transmission branch) is stable, and accurately measure the phase of the two transmission branches relative to the reference branch ( 、 ), stored in the corresponding location of the FLASH device.

[0046] 4. After the above-mentioned digital T / R components are debugged and installed in the array, the array-level phase compensation coefficient and the array-level amplitude compensation coefficient are formed by means of array near-field testing, and the array-level phase compensation coefficient of each component is formed according to the position of the above-mentioned digital T / R components in the array ( ), array level amplitude compensation coefficient (Amp_compensation), stored in the corresponding position of the FLASH device.

[0047] 5. Provide the overall unit-level amplitude weighting coefficient (w) required for the array's transmit beam and the weights for the array's near-field test, which are stored in the corresponding positions of the FLASH device according to the positions of the above-mentioned digital T / R components on the array.

[0048] When the digital T / R assembly is operating, the FLASH device in the DDS phase configuration module contains pre-loaded information about the position of each channel on the array, channel-level phase compensation codes, array-level phase compensation codes, element-level transmit amplitude weights, and array-level amplitude compensation codes. Upon system power-up, the FPGA chip automatically loads the various compensation codes from the FLASH device. During operation, according to system instructions, the phase compensation and beam control phase offset calculation results (derived from the corresponding pre-loaded information) for the corresponding frequency point are retrieved, along with the arc cosine of the multiplication of the array-level amplitude compensation code and the element-level transmit amplitude weights. The result is then accumulated and calculated in the DDS phase accumulation module and assigned to the corresponding channels of the two DDS devices to modulate the phase of the resulting intermediate frequency local oscillator signal. This signal is then sent to the local oscillator transmission and pre-excitation generation module for mixing, generating the desired pre-excitation signal. After the pre-excitation signal is amplified and filtered by the A and B branches of the pre-excitation signal amplification module, it is power-synthesized in the excitation signal formation and transmission branches. The synthesized excitation signal amplitude information includes the restored amplitude weighting coefficient (w), and the phase information includes the control code for beam pointing. The excitation signal is sent to the antenna unit through the coupler for radiation. The transmit beam formed by the antenna array realizes the low sidelobe transmit beam or the transmit beam adaptive nulling function.

[0049] In order to facilitate understanding of the technical solution of the present invention, the principle thereof is further explained below:

[0050] Assume that the local oscillator signal sent by the frequency source is ),in and are the carrier frequency and initial phase of the local oscillator signal respectively. After the local oscillator signal passes through the local oscillator transmission and pre-excitation signal forming module, two pre-excitation signals are formed. The two pre-excitation signals enter the pre-excitation signal amplification module for saturation amplification. Assume that the output excitation signal powers of the A and B power amplifiers are and , then the pre-excitation signals after saturation amplification by the pre-excitation signal amplification modules A and B are:

[0051] , .

[0052] in: , is the frequency of DDS, and t is the time. After the phase compensation of each transmitting branch, it can be considered that the phases of transmitting branches A and B are approximately equal after branch-level phase compensation, which is set as .

[0053] Then the excitation signal formed by the transmitting branches A and B after the excitation signal is formed and the transmitting module is:

[0054]

[0055] After simplification, we get:

[0056]

[0057] Theoretically, after strict array-level amplitude compensation, the amplitude of the excitation signal across the entire array should be consistent.

[0058] It is the intermodulation signal caused by the imbalance of the amplitude of the local oscillator signal Sin sent by the frequency source during the transmission process of the two branches A and B of the transmission link.

[0059] During the design and demonstration phase of the digital array radar, the system as a whole puts forward corresponding channel consistency requirements for the digital T / R components based on the technical and tactical index requirements.

[0060] The present invention solves the problem in existing digital array radar digital T / R component transmission links that the amplitude cannot be arbitrarily weighted due to the use of a high power amplifier (HPA) to achieve saturated amplification of the excitation signal. The HPA can be used to achieve both saturated amplification of the excitation signal and arbitrary weighting of the signal amplitude, solving the application problem of anti-interference technologies such as low sidelobe of the transmit beam and adaptive nulling in digital array radars.

[0061] In summary, the present invention provides a digital T / R component and method for arbitrarily weighting the transmit chain amplitude. This component does not require complex external circuits and only requires adding a DDS module and a DDS phase configuration module to the intermediate frequency local oscillator formation module of the original digital T / R component, and adding a mixer to the local oscillator transmission and pre-excitation formation module. This can be achieved by utilizing the design logic used in the method of the present invention in the DDS phase configuration module.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] 1. The present invention solves the problem in existing digital array radars where the transmit branch of the digital T / R assembly uses an HPA to amplify the excitation signal, resulting in distorted amplitude information and the inability to perform relevant amplitude modulation. This problem prevents the implementation of a series of system-level technologies that require T / R assembly amplitude information in phased array radars, such as low-sidelobe transmit beams, transmit beam adaptive nulling, and other anti-interference and anti-clutter technologies.

[0064] 2. The present invention makes a simple improvement to the existing digital T / R component transmission chain. It only requires adding a DDS chip and a mixer, and adding the corresponding transmission branch amplitude compensation and system-level amplitude weighting coefficient to the DDS phase configuration item in the FPGA. It can be realized. The structure is simple and easy to implement.

[0065] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0066] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0067] In the several embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0068] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0069] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), random access memory (English full name: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program code.

[0071] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above 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 embodiments of the present application.

Claims

1. A digital T / R component with arbitrarily weighted transmit link amplitude, characterized in that: Its transmission link includes a local oscillator transmission and pre-excitation signal formation module, a pre-excitation signal amplification module, an intermediate frequency local oscillator generation module and an excitation signal formation and transmission module; The intermediate frequency local oscillator generating module generates two phase-adjustable intermediate frequency signals and sends them to the local oscillator transmission and pre-excitation signal forming module; The local oscillator transmission and pre-excitation signal forming module receives the local oscillator signal sent by the external frequency source, mixes the local oscillator signal with the two intermediate frequency signals from the intermediate frequency local oscillator generating module to form two first pre-excitation signals, and sends them to the pre-excitation signal amplification branch module; The pre-excitation signal amplification module performs power amplification and filtering on the two first pre-excitation signals generated by the local oscillation transmission and pre-excitation signal formation module to generate two corresponding second pre-excitation signals and sends them to the excitation signal formation and transmission module; The excitation signal generating and transmitting module performs power synthesis on the second pre-excitation signal to generate an excitation signal and sends it to the antenna unit; The intermediate frequency local oscillator generation module includes two DDS modules and a DDS phase configuration module; the DDS phase configuration module generates wave control codes and various phase compensation coefficients and sends them to the two DDS modules for phase accumulation calculation to form the phase information of the intermediate frequency local oscillator output by the two DDS modules; The various phase compensation coefficients include the array-level transmission phase compensation coefficient, the phase compensation coefficient of the two amplification branches of the pre-excitation signal amplification module, and the amplitude phase compensation coefficient; The DDS phase configuration module is a circuit with an FPGA chip as the core control unit, including a FLASH device, a system control and timing processing unit, a wave control code calculation unit, a channel phase compensation calculation unit, an array phase compensation calculation unit, a unit-level amplitude weight calculation unit, an array-level amplitude compensation calculation unit, an arc cosine calculation unit, and a negation calculation unit; The amplitude phase compensation coefficient includes a positive amplitude phase compensation coefficient and a negative amplitude phase compensation coefficient. The positive amplitude phase compensation coefficient is obtained by multiplying the array level amplitude compensation coefficient and the unit level amplitude weighting coefficient and then taking the inverse cosine. The negative amplitude phase compensation coefficient is obtained by inverting the positive amplitude phase compensation coefficient. The FLASH device includes pre-loaded position information of each channel of the digital T / R component on the array, channel-level phase compensation code, array-level phase compensation code, unit-level transmission amplitude weight and array-level amplitude compensation code.

2. The digital T / R component with arbitrary weighting of the transmission link amplitude according to claim 1, characterized in that: The pre-excitation signal amplification module includes a pre-excitation signal amplification branch A and a pre-excitation signal amplification branch B; The hardware structures of the pre-excitation signal amplifying branch A and the pre-excitation signal amplifying branch B are exactly the same, including a pre-excitation amplifier, an HPA and a filter; The first pre-excitation signal from the local oscillator transmission and pre-excitation signal formation module is processed in turn by the pre-excitation amplifier, HPA and filter in the pre-excitation signal amplification branch A and the pre-excitation signal amplification branch B to generate a second pre-excitation signal and send it to the excitation signal formation and transmission module.

3. The digital T / R component with arbitrary weighting of the transmission link amplitude according to claim 2, characterized in that: The excitation signal forming and transmitting module includes an equal power combiner and a circulator; The second pre-excitation signals from the two pre-excitation signal amplification branches A and B of the pre-excitation signal amplification module are power-added in an equal power combiner to generate an excitation signal, and the circulator sends the generated excitation signal to the antenna unit.

4. The digital T / R component with arbitrary weighting of the transmission link amplitude according to claim 3, characterized in that: The local oscillator transmission and pre-excitation signal forming module includes a one-to-two power distributor and a mixer.

5. A digital T / R component method for transmitting a link with arbitrary weighted amplitude The digital T / R component method for transmitting a link with arbitrary weighted amplitude is characterized in that: The method is implemented based on the digital T / R component with arbitrarily weighted amplitude of the transmission link as described in any one of claims 1 to 4. The pre-excitation signal amplification module includes two pre-excitation signal amplification branches, and the gain of the HPA in each pre-excitation signal amplification branch remains consistent within an error range.

6. The method for a digital T / R component with arbitrary weighting of transmission link amplitude according to claim 5, characterized in that: A phase reference model or a phase stability of a reference link used to measure the phases of two transmitting branches; the two transmitting branches are specifically the two circuit paths through which the local oscillator signal passes from the local oscillator transmission and pre-excitation signal generation module, the pre-excitation signal amplification module, the excitation signal formation and transmission module.

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