Antenna reflector surface deformation measurement and correction method and device based on phased array feed

Abstract

The application provides a kind of antenna reflector surface deformation measurement and correction method and device based on phased array feed source.The antenna reflector surface deformation measurement and correction method based on phased array feed source includes: obtaining focal plane field data by placing phased array feed source in antenna focal plane;Based on phased array holography, the deformation information corresponding to the current antenna reflector surface and the root mean square value of surface error corresponding to the current antenna reflector surface are determined according to the focal plane field data;And in the case where the root mean square value of surface error corresponding to the current antenna reflector surface is greater than or equal to the preset value, the surface correction processing is carried out on the current antenna reflector surface based on conjugate field matching method according to the deformation information corresponding to the current antenna reflector surface, until the root mean square value of surface error corresponding to the antenna reflector surface after surface correction is less than the preset value, and the target antenna reflector surface is obtained.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically to a method and apparatus for measuring and correcting antenna reflector deformation based on a phased array feed. Background Technology

[0002] To improve signal detection sensitivity, radio telescopes are developing towards larger apertures and higher frequencies. The primary reflector of large radio telescopes is typically a parabolic surface, and the main factor affecting the electrical performance of parabolic antennas is surface shape error. To ensure the effective operation of large radio telescopes and large radars, the shape of their reflectors must be regularly inspected, and surface shape errors must be corrected or compensated in a timely manner, thus maintaining antenna performance above given specifications. However, as antenna apertures continue to increase, they are increasingly affected by their own weight, wind loads, and solar radiation temperatures, greatly increasing the difficulty of inspecting and maintaining the reflector shape.

[0003] Currently, photogrammetry, laser measurement, and radio holography are the main methods used to measure the deformation of the reflector surface. After obtaining the actual shape of the reflector surface using these methods, the adjustment amount at each point on the reflector surface can be calculated. Surface shape adjustments can then be made directly or indirectly through manual adjustments, actuators on the radio telescope's backrest, or deformable plates, thereby correcting or compensating for surface shape errors. However, these methods cannot keep up with changes in wind load, nor can they achieve real-time measurement of antenna reflector surface deformation under the influence of wind load and solar radiation temperature, thus failing to meet the actual performance requirements of the antenna. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method and apparatus for measuring and correcting antenna reflector deformation based on phased array feed.

[0005] According to a first aspect of the present invention, a method for measuring and correcting antenna reflector deformation based on a phased array feed is provided, comprising: acquiring focal plane field data using a phased array feed placed on the focal plane of an antenna; determining deformation information corresponding to a current antenna reflector and a root mean square (RMS) value of surface shape error corresponding to the current antenna reflector based on the focal plane field data using a phased array holographic method; and, if it is determined that the RMS value of surface shape error corresponding to the current antenna reflector is greater than or equal to a preset value, performing surface shape correction processing on the current antenna reflector based on a conjugate field matching method according to the deformation information corresponding to the current antenna reflector, until the RMS value of surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, thereby obtaining a target antenna reflector.

[0006] According to an embodiment of the present invention, the acquisition of focal plane field data using a phased array feed placed on the focal plane of the antenna includes: receiving or tracking a plane electromagnetic wave signal incident on the axially incident antenna using a phased array feed placed on the focal plane of the antenna to acquire focal plane field data; wherein, the phased array feed includes a dense feed array and / or a reconfigurable feed array.

[0007] According to an embodiment of the present invention, the step of determining the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector based on the phased array holographic method and the focal field data includes: determining the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector by means of coordinate transformation processing, two-dimensional Fourier transform processing, phase transformation processing and surface shape error solving processing based on the focal field data.

[0008] According to an embodiment of the present invention, when it is determined that the root mean square value of the surface shape error corresponding to the current antenna reflector is greater than or equal to a preset value, the surface shape correction process is performed on the current antenna reflector based on the conjugate field matching method and according to the deformation information corresponding to the current antenna reflector, until the root mean square value of the surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, thereby obtaining the target antenna reflector, including: determining the amplitude and phase modulation values ​​of each element in the phased array feed based on the conjugate field matching method and according to the deformation information corresponding to the current antenna reflector; determining the relative values ​​of the amplitude and phase modulation values ​​of each element in the phased array feed relative to the amplitude and phase modulation values ​​of a reference element; and performing surface shape correction processing on the current antenna reflector based on the relative values.

[0009] According to an embodiment of the present invention, the preset value is one-twentieth of the predetermined working wavelength value.

[0010] A second aspect of the present invention provides an antenna reflector deformation measurement and correction device based on a phased array feed, comprising: an acquisition module for acquiring focal plane field data using a phased array feed placed on the focal plane of an antenna; a determination module for determining, based on a phased array holographic method, deformation information corresponding to a current antenna reflector and a root mean square value of surface shape error corresponding to the current antenna reflector according to the focal plane field data; and an acquisition module for, when determining that the root mean square value of surface shape error corresponding to the current antenna reflector is greater than or equal to a preset value, performing surface shape correction processing on the current antenna reflector based on a conjugate field matching method according to the deformation information corresponding to the current antenna reflector, until the root mean square value of surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, thereby obtaining a target antenna reflector.

[0011] A third aspect of the present invention provides an electronic device comprising: one or more processors; and a memory for storing one or more programs, wherein, when the one or more programs are executed by the one or more processors, the one or more processors perform the methods disclosed above.

[0012] A fourth aspect of the present invention also provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, cause the processor to perform the methods disclosed above. Attached Figure Description

[0013] The above-described features, other objects, and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0014] Figure 1 A flowchart illustrating the method for measuring and correcting antenna reflector deformation based on a phased array feed according to an embodiment of the present invention is shown.

[0015] Figure 2 This schematic diagram illustrates the principle of real-time measurement of antenna reflector deformation using a focal plane dense feed array.

[0016] Figure 3 This schematic diagram illustrates the principle of rapidly measuring antenna reflector deformation using a focal plane reconfigurable feed array.

[0017] Figure 4 A schematic diagram of the parabolic reflector of the main focal antenna and the coordinate system of the focal plane is shown.

[0018] Figure 5 A schematic diagram of the deformation measurement and correction system is shown.

[0019] Figure 6 A schematic diagram illustrates the structural block diagram of an antenna reflector deformation measurement and correction device based on a phased array feed according to an embodiment of the present invention; and

[0020] Figure 7 A block diagram of an electronic device suitable for implementing a method for measuring and correcting antenna reflector deformation based on a phased array feed, according to an embodiment of the present invention, is shown schematically. Detailed Implementation

[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0023] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0024] When using expressions such as "at least one of A, B, and C", they should generally be interpreted in accordance with the meaning that is commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.).

[0025] pass Figure 1 The method for measuring and correcting antenna reflector deformation based on phased array feed, according to the disclosed embodiments, is described in detail.

[0026] Figure 1 A flowchart illustrating a method for measuring and correcting antenna reflector deformation based on a phased array feed according to an embodiment of the present invention is shown. Figure 1 As shown, this embodiment includes operations S101 to S103.

[0027] In operation S101, focal plane field data is acquired using a phased array feed placed on the focal plane of the antenna.

[0028] For example, a phased array feed placed on the focal plane of an antenna can be used to receive or track a planar electromagnetic wave signal incident on the axially incident antenna to obtain focal plane field data; wherein the phased array feed includes a dense feed array and / or a reconfigurable feed array.

[0029] A phased array feed is a group of feed arrays placed on the focal plane of an antenna. It can be understood that by properly configuring the amplitude and phase of each element in the phased array feed, electronic compensation for the deformation of the reflector surface can be achieved. The compensation speed is instantaneous, thus enabling real-time correction of the reflector surface deformation. In addition, through theoretical derivation, the surface shape accuracy of the reflector surface can be quickly measured based on the focal plane field sampling data captured by the phased array feed.

[0030] In operation S102, based on the phased array holographic method, the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector are determined according to the focal field data.

[0031] For example, based on the focal field data, through coordinate transformation, two-dimensional Fourier transform, phase transformation, and surface shape error solving, the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector are determined.

[0032] In operation S103, if the root mean square value of the surface shape error corresponding to the current antenna reflector is greater than or equal to the preset value, the surface shape of the current antenna reflector is corrected based on the deformation information corresponding to the current antenna reflector according to the conjugate field matching method until the root mean square value of the surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, and the target antenna reflector is obtained.

[0033] For example, based on the conjugate field matching method, the amplitude and phase modulation values ​​of each element in the phased array feed are determined according to the deformation information corresponding to the current antenna reflector; the relative values ​​of the amplitude and phase modulation values ​​of each element in the phased array feed with respect to the amplitude and phase modulation values ​​of the reference element are determined; and the surface shape of the current antenna reflector is corrected according to the relative values.

[0034] For example, the preset value is one-twentieth of the predetermined working wavelength value.

[0035] For example, the method for measuring and correcting antenna reflector deformation based on phased array feed includes a focal field acquisition step, a phased array holographic measurement step, and a surface shape error correction step.

[0036] Focal field acquisition steps, such as directly receiving or tracking the plane electromagnetic wave signal of the incident antenna along the axial direction by placing a dense feed array or a reconfigurable feed array on the focal plane.

[0037] The phased array holographic measurement steps, such as the antenna focal field obtained from the focal field acquisition steps, use formulas such as coordinate transformation, two-dimensional Fourier transform, phase solution, and surface shape error solution to calculate the surface shape error RMS (i.e., the root mean square value of the surface shape error corresponding to the current antenna reflector) corresponding to the current reflector deformation.

[0038] The surface shape error correction step, for example, involves feeding back the current reflector surface deformation information obtained in the phased array holographic measurement step to the antenna reflector surface deformation control subsystem and the beamforming subsystem, so that the two can correct and compensate for the reflector surface deformation through mechanical and electronic means, respectively.

[0039] To obtain the target antenna reflector, the focal field acquisition step, the phased array holographic measurement step, and the surface shape error correction step can be repeated until the surface shape error RMS value (i.e., the root mean square value of the surface shape error corresponding to the current antenna reflector) in the phased array holographic measurement step is less than the preset value, thereby obtaining the target antenna reflector.

[0040] As can be seen, the antenna reflector deformation measurement and correction method based on phased array feed in this embodiment of the invention can not only obtain the RMS value of the surface shape error corresponding to the reflector deformation, but also obtain the feed offset information of the main focal antenna or the sub-reflector offset information of the focal antenna. By feeding it back to the feed or sub-reflector pose control subsystem, the feed or sub-reflector can be adjusted to the ideal position.

[0041] The antenna reflector deformation measurement and correction method based on phased array feed in this invention collects focal plane field data by placing a phased array feed on the antenna focal plane, measures the surface shape accuracy of the reflector according to the theoretically derived phased array holography method, thereby achieving rapid or real-time measurement of reflector deformation. Then, the reflector deformation is corrected in real time from the perspective of electronic compensation by using the conjugate field matching method. The method can simultaneously measure and correct antenna reflector deformation and achieve rapid real-time measurement and correction.

[0042] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the present invention is not limited to the following embodiments.

[0043] Figure 2 This diagram schematically illustrates the principle of real-time measurement of antenna reflector deformation using a focal plane dense feed array. The left half, (a), shows the measurement of reflector deformation of the main focal antenna; the right half, (b), shows the measurement of reflector deformation of the Cadbury antenna. A planar electromagnetic wave signal is incident on the antenna along its axis, reflected by the reflector, and received by the dense feed array placed on the focal plane. The amplitude and phase of each element in this dense feed array can be independently controlled; it is also called a phased array feed. The element located at the focal point in the phased array feed is called the reference element. Figure 2 The a1 array element. For the main focal antenna, the reflecting surface is a parabolic surface; for the Cadbury antenna, the main reflecting surface is a parabolic surface.

[0044] Figure 3This diagram schematically illustrates the principle of rapidly measuring antenna reflector deformation using a focal plane reconfigurable feed array. The left half, (a), shows the measurement of reflector deformation for a main focal antenna; the right half, (b), shows the measurement of reflector deformation for a Cadbury antenna. A planar electromagnetic wave signal is incident on the antenna along its axis, reflected by the reflector, and received by the reconfigurable feed array placed on the focal plane. The amplitude and phase of each element in this reconfigurable feed array can be independently controlled; it is also called a phased array feed. The element located at the focal point in the phased array feed is called the reference element. Figure 3 The a1 array element. For the main focal antenna, the reflecting surface is a parabolic surface; for the Cadbury antenna, the main reflecting surface is a parabolic surface.

[0045] The supports for array elements a1, b1, c1, d1, and e1 are connected together by a rigid connection, or these support supports can be made into a single unit. The array elements can be moved on the support supports to adjust their positions. The advantage of adjustable element positions on the support supports is that the positions of individual elements can be adjusted according to actual observation needs, or elements of different sizes can be used.

[0046] Reconfigurable feed array measurements require each element to scan the focal plane, in order to Figure 3 For example, by rotating the array element support of the five array elements connected in the above manner counterclockwise once, the array elements a1, b1, c1, d1, and e1 can scan the focal plane. One way to shorten the mechanical scanning time is to use more array elements, for example, in... Figure 3 If array elements b2, c2, d2, and e2 are added opposite to the array elements b1, c1, d1, and e1 respectively, the array element support can rotate half a turn to drive the array elements to scan the focal plane, which means the scanning time can be reduced by half. However, increasing the number of array elements will also bring about the problem of mutual coupling between array elements, especially when the spacing between array elements is very small, the mutual coupling will have a great impact.

[0047] By properly designing the positions of each scanning element and dispersing them, the mutual coupling effect of a reconfigurable feed array with a relatively small number of elements can be reduced. When the number of elements in the reconfigurable feed array is reduced to 1, the mutual coupling effect of the elements no longer exists, but at this time the elements need to perform both circumferential and radial movements to scan the focal plane, thus taking longer.

[0048] Figure 4A schematic diagram of the parabolic reflector of the master focal antenna and the coordinate system of the focal plane is shown. B is the vertex of the parabola S; P is any point on the parabola S; O is the foot of the perpendicular from point P to the axis of the parabola; the focus o of the parabola is the origin; the axis of the parabola is the z-axis; an arbitrary x-axis is selected, and a spatial rectangular coordinate system oxyz is constructed according to the right-hand screw rule; the local coordinate system X-axis passing through point O is parallel to the x-axis; the feed is located at point P′, and the lateral deviation from the focus o of the parabola is a distance oP′=δ; the distance from point P to the focus o of the parabola is oP=r. The theoretical derivation of phased array holographic measurement is as follows:

[0049] For single-carrier or narrowband far-field signals, when the signal incident direction is perpendicular to the aperture plane, the signal T(Δx, Δy) received by a single feedhorn can be expressed as:

[0050]

[0051] Where Δx and Δy are the coordinates of any point P′ on the focal plane; Δr is the optical path difference, i.e., PP′-Po; k is the wave number, k=2π / λ; F is the focal length of the master focal antenna or the equivalent focal length of the cascade antenna; J(x,y) is the induced current distribution on the parabolic reflector S; λ is the operating wavelength; cosξ is the parabolic surface correction factor, and

[0052]

[0053] The optical path difference Δr in equation (1) can be expressed as:

[0054]

[0055] Where, θ rδ yes Figure 4 ∠PoP′ in equation (3). Since the size of the phased array feed source is very small relative to the length of the electromagnetic wave propagation path Po, i.e., δ / r << 1, therefore, the square root of equation (3) is... The result of the term tends to zero. Therefore, we can use the radical term in the Taylor expansion formula (3). Thus obtain

[0056]

[0057] Ignore higher than Then, for higher-order terms, equation (4) can be approximately expressed as:

[0058]

[0059] Wherein, cosθ rδ It can be represented as

[0060] cosθ rδ =sinθcos(φ-φ′) (6)

[0061] Where θ is Figure 4 In the equation ∠PoO, φ is... Figure 4 Mid-vector The angle φ′ with the X-axis is Figure 4 The angle between the median vector oP′ and the x-axis. In the expansion (6), cos(φ-φ′) and since δcosφ′=Δx and δsinφ′=Δy, we obtain...

[0062] Δr=-(Δx cosφ+Δy sinφ)sinθ (7)

[0063] Substituting equation (7) into equation (1), equation (1) can be approximated as follows:

[0064]

[0065] set up Therefore, equation (8) can be rewritten as follows:

[0066]

[0067] Performing a Fourier transform on T(u, v) yields...

[0068] Q(l f m f )=F[T(u,v)] (10)

[0069] Where F[...] denotes the two-dimensional Fourier transform.

[0070] Will Substituting into the above formula, we can obtain

[0071]

[0072] Combining equations (2)(8)(9)(10)(11), the deformation ε(x,y) of the parabolic reflecting surface can be obtained as follows:

[0073] Here, Phase{...} represents calculating the phase.

[0074] The surface shape error RMS can be solved by the following formula.

[0075]

[0076] Where N is the number of sampling points on the reflecting surface, ε(x) P y P ) is the deformation at any sampling point P on the reflecting surface.

[0077] In mechanical correction methods, the deformation ε(x) at a point on the reflecting surface P yP The adjustment amount is its negative number -ε(x) P y P In the electronic compensation method, based on the signals T(Δx, Δy) received by each element of the phased array feed placed on the focal plane, the conjugate field matching method is used to solve for the amplitude and phase modulation values ​​of each element. The amplitude and phase modulation values ​​of each element are...

[0078] T'(Δx, Δy)={R(Δx, Δy)} * (14)

[0079] Where R(Δx, Δy) represents the received signal T(Δx, Δy) of each array element and the received signal T of the reference array element. ref The cross-correlation result of (Δx, Δy), {...} * This indicates finding the conjugate;

[0080] Calculate the amplitude and phase modulation values ​​of each array element relative to the amplitude and phase modulation value T′ of the reference array element. ref The relative values ​​of (Δx, Δy), i.e.

[0081]

[0082] The relative values ​​T″(Δx, Δy) of the amplitude and phase modulation values ​​of each array element are used as the final amplitude and phase modulation values. Obviously, the final amplitude and phase modulation value of the reference array element is 1.

[0083] Signal synthesis is performed based on the final amplitude and phase modulation values ​​T″(Δx, Δy) of each array element. The synthesized electromagnetic wave signal is reflected by the reflector to reach the far field, and the far field radiation function of the antenna is optimized, thereby realizing the correction of the antenna reflector deformation from the perspective of electronic compensation.

[0084] Figure 5 A schematic diagram of the deformation measurement and correction system is shown. Point-source or extended-source radio signals are reflected and converged by the antenna to reach the phased array feed. Each element of the phased array feed receives a portion of the energy, and its received signal can be represented as T(Δx, Δy). After passing through a low-noise amplifier (LNA), down-converted DC, and A / D sampling, the signal enters the FPGA array.

[0085] In the FPGA array, the focal plane field amplitude and phase are first analyzed. The pointing error feedback, primary surface deformation feedback, and secondary surface servo feedback are then fed back to the antenna azimuth and elevation servo drive system, the primary surface control system, and the secondary surface control system, respectively. The primary surface deformation feedback is the negative of the deformation ε(x, y) of the parabolic reflector. The actuator network in the primary surface control system adjusts the feed rate of each actuator node based on the primary surface deformation feedback.

[0086] Then, multi-beam weighted synthesis is performed to correct the beam weighting value of the reflector deformation, namely the aforementioned T″(Δx, Δy). The synthesized multi-beam data is then fed into the GPU for further processing and application.

[0087] Furthermore, the surface shape error cloud map of the reflecting surface measured using the phased array holographic method can be obtained. For example, using simulation surface shape data of gravity deformation, the surface shape of the reflecting surface based on the phased array feed was measured, and the measurement result was 0.38 mm, which is consistent with the far-field holographic measurement result. Thus, the feasibility of the holographic measurement method based on the phased array feed is preliminarily verified.

[0088] Figure 6 The diagram schematically illustrates a structural block diagram of an antenna reflector deformation measurement and correction device based on a phased array feed according to an embodiment of the present invention.

[0089] like Figure 6 As shown, the antenna reflector deformation measurement and correction device 600 based on phased array feed in this embodiment includes an acquisition module 610, a determination module 620 and an acquisition module 630.

[0090] The acquisition module 610 is used to acquire focal plane field data using a phased array feed placed on the focal plane of the antenna; the determination module 620 is used to determine the deformation information and the root mean square value of the surface shape error corresponding to the current antenna reflector based on the focal plane field data using the phased array holography method; and the acquisition module 630 is used to perform surface shape correction processing on the current antenna reflector based on the deformation information corresponding to the current antenna reflector using the conjugate field matching method when the root mean square value of the surface shape error corresponding to the current antenna reflector is determined to be greater than or equal to a preset value, until the root mean square value of the surface shape error corresponding to the current antenna reflector is less than the preset value, thereby obtaining the target antenna reflector.

[0091] According to embodiments of the present invention, any plurality of modules among the acquisition module 610, determination module 620, and obtaining module 630 may be combined into one module, or any one of these modules may be split into multiple modules. Alternatively, at least a portion of the functionality of one or more of these modules may be combined with at least a portion of the functionality of other modules and implemented in one module. According to embodiments of the present invention, at least one of the acquisition module 610, determination module 620, and obtaining module 630 may be at least partially implemented as hardware circuitry, such as a field-programmable gate array (FPGA), a programmable logic array (PLA), a system-on-a-chip, a system-on-a-substrate, a system-on-package, an application-specific integrated circuit (ASIC), or any other reasonable means of integrating or packaging circuitry, or implemented in software, hardware, or firmware, or in any appropriate combination of any of these three implementation methods. Alternatively, at least one of the acquisition module 610, determination module 620, and obtaining module 630 may be at least partially implemented as a computer program module, which, when run, can perform corresponding functions.

[0092] Figure 7 A block diagram of an electronic device suitable for implementing a method for measuring and correcting antenna reflector deformation based on a phased array feed, according to an embodiment of the present invention, is shown schematically.

[0093] like Figure 7 As shown, an electronic device 700 according to an embodiment of the present invention includes a processor 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage portion 708 into a random access memory (RAM) 703. The processor 701 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or an associated chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 701 may also include onboard memory for caching purposes. The processor 701 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0094] RAM 703 stores various programs and data required for the operation of electronic device 700. Processor 701, ROM 702, and RAM 703 are interconnected via bus 704. Processor 701 executes various operations of the method flow according to embodiments of the present invention by executing programs in ROM 702 and / or RAM 703. It should be noted that the programs may also be stored in one or more memories other than ROM 702 and RAM 703. Processor 701 may also execute various operations of the method flow according to embodiments of the present invention by executing programs stored in said one or more memories.

[0095] According to an embodiment of the present invention, the electronic device 700 may further include an input / output (I / O) interface 705, which is also connected to a bus 704. The electronic device 700 may also include one or more of the following components connected to the I / O interface 705: an input section 706 including a keyboard, mouse, etc.; an output section 707 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN card, modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. A removable medium 711, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on the drive 710 as needed so that computer programs read from it can be installed into the storage section 708 as needed.

[0096] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments; or it may exist independently and not assembled into the device / apparatus / system. The computer-readable storage medium carries one or more programs, which, when executed, implement the method according to the embodiments of the present invention.

[0097] According to embodiments of the present invention, a computer-readable storage medium may be a non-volatile computer-readable storage medium, such as including, but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. For example, according to embodiments of the present invention, a computer-readable storage medium may include ROM 702 and / or RAM 703 and / or one or more memories other than ROM 702 and RAM 703 described above.

[0098] Embodiments of the present invention also include a computer program product comprising a computer program containing program code for performing the methods shown in the flowchart. When the computer program product is run on a computer system, the program code enables the computer system to implement the antenna reflector deformation measurement and correction method based on a phased array feed provided in the embodiments of the present invention.

[0099] When the computer program is executed by the processor 701, it performs the functions defined in the system / apparatus of this invention. According to embodiments of the invention, the systems, apparatuses, modules, units, etc., described above can be implemented by computer program modules.

[0100] In one embodiment, the computer program may rely on a tangible storage medium such as an optical storage device or a magnetic storage device. In another embodiment, the computer program may also be transmitted and distributed in the form of signals over a network medium, and may be downloaded and installed via the communication section 709, and / or installed from a removable medium 711. The program code contained in the computer program can be transmitted using any suitable network medium, including but not limited to: wireless, wired, etc., or any suitable combination thereof.

[0101] In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 709, and / or installed from the removable medium 711. When the computer program is executed by the processor 701, it performs the functions defined in the system of this embodiment of the invention. According to embodiments of the invention, the systems, devices, apparatuses, modules, units, etc., described above can be implemented by computer program modules.

[0102] According to embodiments of the present invention, program code for executing the computer programs provided in the embodiments of the present invention can be written in any combination of one or more programming languages. Specifically, these computational programs can be implemented using high-level procedural and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, languages ​​such as Java, C++, Python, "C", or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0103] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0104] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

[0105] The embodiments of the present invention have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.

Claims

1. A method for measuring and correcting antenna reflector deformation based on a phased array feed, comprising: Focal field data is obtained using a phased array feed placed on the focal plane of the antenna; Based on the phased array holography method, the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector are determined according to the focal field data. as well as If the root mean square value of the surface shape error corresponding to the current antenna reflector is determined to be greater than or equal to a preset value, the surface shape of the current antenna reflector is corrected based on the deformation information corresponding to the current antenna reflector according to the conjugate field matching method until the root mean square value of the surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, and the target antenna reflector is obtained. This includes: Based on the conjugate field matching method, the amplitude and phase modulation values ​​of each element in the phased array feed are determined according to the deformation information corresponding to the current antenna reflector. Determine the relative values ​​of the amplitude and phase modulation values ​​of each element in the phased array feed to the amplitude and phase modulation values ​​of the reference element; and The surface shape of the current antenna reflector is corrected based on the relative value.

2. The method according to claim 1, wherein, The method of acquiring focal plane field data using a phased array feed placed on the focal plane of the antenna includes: Focal field data is obtained by receiving or tracking planar electromagnetic wave signals incident on the antenna along the axial direction using a phased array feed placed on the focal plane of the antenna; wherein, the phased array feed includes a dense feed array and / or a reconfigurable feed array.

3. The method according to claim 1, wherein, The step based on phased array holography, determining the deformation information and root mean square value of the surface shape error corresponding to the current antenna reflector based on the focal field data, includes: Based on the focal field data, the deformation information and root mean square value of the surface shape error corresponding to the current antenna reflector are determined through coordinate transformation, two-dimensional Fourier transform, phase transformation, and surface shape error solving.

4. The method according to claim 1, wherein, The preset value is one-twentieth of the predetermined working wavelength value.

5. A device for measuring and correcting antenna reflector deformation based on a phased array feed, comprising: The acquisition module is used to acquire focal plane field data using a phased array feed placed on the focal plane of the antenna; The determination module is used to determine, based on the phased array holography method, the deformation information corresponding to the current antenna reflector and the root mean square value of the surface shape error corresponding to the current antenna reflector according to the focal field data; as well as The acquisition module is used to, when it is determined that the root mean square value of the surface shape error corresponding to the current antenna reflector is greater than or equal to a preset value, perform surface shape correction processing on the current antenna reflector based on the conjugate field matching method and according to the deformation information corresponding to the current antenna reflector, until the root mean square value of the surface shape error corresponding to the antenna reflector after surface shape correction is less than the preset value, thereby obtaining the target antenna reflector; The acquisition module is based on the conjugate field matching method. According to the deformation information corresponding to the current antenna reflector, it determines the amplitude and phase modulation values ​​of each element in the phased array feed; determines the relative values ​​of the amplitude and phase modulation values ​​of each element in the phased array feed with respect to the amplitude and phase modulation values ​​of the reference element; and performs surface shape correction processing on the current antenna reflector according to the relative values.

6. The apparatus according to claim 5, wherein, The acquisition module is specifically used for: Focal field data is obtained by receiving or tracking planar electromagnetic wave signals incident on the antenna along the axial direction using a phased array feed placed on the focal plane of the antenna; wherein, the phased array feed includes a dense feed array and / or a reconfigurable feed array.

7. The apparatus according to claim 5, wherein, The determining module is specifically used for: Based on the focal field data, the deformation information and root mean square value of the surface shape error corresponding to the current antenna reflector are determined through coordinate transformation, two-dimensional Fourier transform, phase transformation, and surface shape error solving.

8. An electronic device, comprising: One or more processors; Storage device for storing one or more programs. Wherein, when the one or more programs are executed by the one or more processors, the one or more processors perform the method according to any one of claims 1 to 4.

9. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1 to 4.

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