Non-uniform wave position rotman lens design method, system, device and medium

Abstract

The application provides a non-uniform wave position Rotman lens design method, system, device and medium, relates to the field of lens multi-beam, and the method comprises the following steps: obtaining target requirement information related to the spatial coverage parameter and the beam overlap level; determining the required non-uniformly distributed wave position by using a wave position optimization algorithm; wherein the non-uniformly distributed wave position corresponds to the beam port of the Rotman lens; determining the original structure layout of the lens by using the geometric optics method; performing full-wave simulation on the original structure layout by using the electromagnetic simulation technology to obtain simulation results; and optimizing and adjusting the original structure layout to obtain a target lens structure meeting the design requirements. The application can realize consistent adjacent beam overlap levels, solves the problems of inconsistent adjacent beam overlap levels and redundant beam numbers caused by the uniform wave position Rotman lens; the same spatial coverage is realized by using fewer wave position numbers, and then the number of lens back-end simulation and digital receiving channels is reduced, so that the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of multi-beam lens technology, specifically to a non-uniform wavefront Rotman lens design method, system, device, and medium. Background Technology

[0002] With the increasing demands for multi-target application environments in fields such as tracking radar, satellite communication, and electronic countermeasures, lens multi-beam technology based on quasi-optical principles has emerged. Lens multi-beam technology uses microwave lenses as the feed network. Utilizing the inherent characteristics of lenses, microwave signals with different phase differences will form wavefronts with different directions when radiated into the air through antenna radiators, thus generating different beam directions and enabling the simultaneous formation of multiple beams.

[0003] In related technologies, to achieve simultaneous reception and detection of broadband signals from multiple directions, a broadband multi-beam antenna system must be employed. Broadband multi-beamforming methods include analog beamforming, digital beamforming, and optical beamforming. Rotman lenses are one method of analog beamforming, capable of broadband signal synthesis under wide-angle scanning conditions, and offering advantages such as wide bandwidth spatial coverage, high direction-finding accuracy, and low cost.

[0004] In traditional Rotman lens design, the distribution of wave positions is usually uniform, meaning the angular difference between adjacent wave positions is fixed. However, since the beamwidth increases with the scanning angle, it inevitably leads to inconsistencies in the overlap levels of adjacent beams and redundancy in the number of beams, thus affecting system reception performance and increasing costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a design method, system, device, and medium for non-uniform wavelength Rotman lenses, which solves the problems of inconsistent overlapping levels of adjacent beams and redundant beam numbers caused by uniform wavelength Rotman lenses.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] In a first aspect, embodiments of this application provide a method for designing a non-uniform wavelength Rotman lens. This method includes: acquiring target requirement information related to spatial coverage parameters and beam overlap levels; determining the required non-uniform wavelength distribution using a wavelength optimization algorithm based on the target requirement information; wherein the non-uniform wavelength distribution corresponds to the beam port of the Rotman lens; determining the original structural layout of the lens using geometric optics based on preset Rotman lens parameters and the non-uniform wavelength distribution; performing full-wave simulation on the original structural layout using electromagnetic simulation technology to obtain simulation results; and optimizing and adjusting the original structural layout based on the simulation results to obtain a target lens structure that meets the design requirements.

[0009] According to a first aspect of the embodiments of this application, the aforementioned target requirement information includes spatial coverage, adjacent beam overlap level requirements, and inter-phase beam overlap level requirements.

[0010] According to a first aspect of the embodiments of this application, the aforementioned Rotman lens parameters include focal angle, focal ratio, and sine ratio.

[0011] According to a first aspect of the embodiments of this application, the non-uniformly distributed wave position is independent of the transmission line type for realizing the Rotman lens, and the non-uniformly distributed wave position is one of microstrip, stripline, and waveguide.

[0012] According to a first aspect of the embodiments of this application, the target lens structure includes a lens, a plurality of array ports, a plurality of beam ports, and a plurality of matching ports; wherein, the plurality of array ports are configured to be connected to the periphery of the lens; the plurality of beam ports are connected to the periphery of the lens and are disposed opposite to the plurality of array ports; and the plurality of matching ports are sandwiched between the array ports and the beam ports.

[0013] According to a first aspect of the embodiments of this application, each set of matching ports is composed of a plurality of matching resistors, each matching resistor having a first end adjacent to the lens and a second end away from the lens, and the width of the matching resistor decreasing from the first end to the second end along its own extending direction.

[0014] According to a first aspect of the embodiments of this application, multiple sets of matching ports are arranged in two pairs. The first pair of matching ports is adjacent to the array port, and the corresponding matching resistor is constructed in a zigzag shape. The second pair of matching ports is adjacent to the beam port, and the corresponding matching resistor is constructed in a straight line shape.

[0015] Secondly, embodiments of this application provide a non-uniform wavelength Rotman lens design system, which includes: an acquisition module, a first determination module, a second determination module, a simulation module, and an optimization adjustment module; wherein, the acquisition module is used to acquire target requirement information related to spatial coverage parameters and beam overlap levels; the first determination module is used to determine the required non-uniform wavelength distribution using a wavelength distribution optimization algorithm based on the target requirement information; wherein, the non-uniform wavelength distribution corresponds to the beam port of the Rotman lens; the second determination module is used to determine the original structural layout of the lens using geometric optics based on preset Rotman lens parameters and the non-uniform wavelength distribution; the simulation module is used to perform full-wave simulation of the original structural layout using electromagnetic simulation technology to obtain simulation results; the optimization adjustment module is used to optimize and adjust the original structural layout based on the simulation results to obtain a target lens structure that meets the design requirements.

[0016] Thirdly, embodiments of this application provide an electronic device, which includes: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, it implements the non-uniform wave position Rotman lens design method described in the first aspect above.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium storing a program or instructions that, when executed by a processor, implement the non-uniform wave position Rotman lens design method described in the first aspect above.

[0018] This application provides a method, system, apparatus, and medium for designing non-uniform wavefront Rotman lenses. Compared with existing technologies, it has the following advantages:

[0019] This application addresses the issues of inconsistent adjacent beam overlap levels and beam redundancy caused by current uniform-position Rotman lenses. Based on the required spatial coverage parameters and beam overlap levels, a position optimization algorithm is used to determine the necessary non-uniformly distributed positions. Then, based on these non-uniformly distributed positions and some preset Rotman lens parameters, the original structural layout of the designed Rotman lens is determined. Full-wave simulation is then performed on this original structural layout to optimize it based on the simulation results until the target lens structure is obtained. This achieves consistent adjacent beam overlap levels, uses fewer positions to achieve the same spatial coverage, and thus reduces the number of analog and digital receiving channels at the lens backend, thereby lowering costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating a non-uniform wave position Rotman lens design method provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the layout of the target lens structure provided in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the overlapping level distribution obtained using the traditional uniform waveform design method;

[0024] Figure 4 This is a schematic diagram of the overlapping level distribution obtained by using the non-uniform wave position Rotman lens design method provided in the embodiments of this application;

[0025] Figure 5 This is the normalized beam pattern provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram comparing the beam overlap levels of full-wave simulation and calculation provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of a non-uniform wave position Rotman lens design system provided in an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0029] Figure description: Array port 1; Beam port 2; Matching port 3; Lens 4. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0032] This application provides a non-uniform wavelength Rotman lens design method, system, device, and medium, which solves the problems of inconsistent overlapping levels of adjacent beams and redundant beam numbers caused by uniform wavelength Rotman lenses, achieving consistent overlapping levels of adjacent beams and achieving the same spatial coverage with fewer wavelengths.

[0033] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0034] Lens multi-beam technology uses microwave lenses as the feed network, leveraging the inherent characteristics of lenses: when microwave signals are input to different focal arc input ports of the lens, microwave signals with approximately equal amplitude and linear phase differences will be simultaneously excited at different output focal arc ports. These phase differences are independent of the signal frequency. When microwave signals with different phase differences are radiated into the air through the antenna radiating element, they will form wavefronts with different directions, i.e., generate different beam directions, and multiple beams can be formed simultaneously.

[0035] After the 1950s, with the increasing demands for multi-target applications in fields such as tracking radar, satellite communication, and electronic warfare, multi-beam lens technology based on quasi-optical principles emerged, the most famous of which is the Rotman lens. The Rotman lens originated from the Roots lens and the R-2R lens. The Roots lens evolved from traditional flat metal optical lenses and has multiple input and output ports, but a certain phase error exists between the ports, which limits its use.

[0036] In fields such as radar, communications, and electronic countermeasures, achieving simultaneous reception and detection of broadband signals from multiple directions necessitates the use of broadband multi-beam antenna systems. Broadband multi-beamforming methods include analog beamforming, digital beamforming, and optical beamforming. Rotman lenses are one method of analog beamforming, capable of broadband signal synthesis under wide-angle scanning conditions, offering advantages such as wide bandwidth spatial coverage, high direction-finding accuracy, and low cost.

[0037] In traditional Rotman lens design, the distribution of wave positions is usually uniform, meaning the angular difference between adjacent wave positions is fixed. However, since the beamwidth increases with the scanning angle, it inevitably leads to inconsistencies in the overlap levels of adjacent beams and redundancy in the number of beams, thus affecting system reception performance and increasing costs.

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] The following section first introduces a non-uniform wavefront Rotman lens design method provided in the embodiments of this application.

[0040] This application provides a flowchart illustrating a non-uniform wavefront Rotman lens design method, as shown in the embodiments below. Figure 1 As shown, the non-uniform wave position Rotman lens design method may include the following steps S110-S150.

[0041] S110. Obtain target requirement information related to spatial coverage parameters and beam overlap levels.

[0042] S120. Based on the target requirements, determine the required non-uniformly distributed wave positions using a wave position optimization algorithm; wherein, the non-uniformly distributed wave positions correspond to the beam ports of the Rotman lens.

[0043] S130. Based on the preset Rotman lens parameters and non-uniformly distributed wave positions, the original structural layout of the lens is determined by geometric optics.

[0044] S140. Full-wave simulation of the original structural layout is performed using electromagnetic simulation technology to obtain simulation results.

[0045] S150. Based on the simulation results, optimize and adjust the original structural layout to obtain the target lens structure that meets the design requirements.

[0046] The above is a specific implementation of a non-uniform wavelength Rotman lens design method provided in this application. It can be understood that, in order to solve the problems of inconsistent overlapping levels of adjacent beams and redundant beam numbers caused by the current uniform wavelength Rotman lens, this application uses a wavelength optimization algorithm to determine the required non-uniform wavelength distribution based on the required spatial coverage parameters and beam overlap levels; then, based on the non-uniform wavelength distribution and some preset Rotman lens parameters, the original structural layout of the designed Rotman lens is determined, and then the original structural layout is subjected to full-wave simulation to optimize the original structural layout according to the simulation results until the target lens structure is obtained.

[0047] Based on this, this application can achieve consistent adjacent beam overlap levels, thereby obtaining consistent system reception performance; this application uses fewer wave positions to achieve the same spatial coverage, thereby reducing the number of analog and digital receiving channels at the lens back end and reducing costs.

[0048] In one example, the wave position optimization algorithm may choose a genetic algorithm or other optimization algorithms to obtain the optimal non-uniform wave position distribution, which includes specific wave position values ​​and wave position numbers.

[0049] In another example, this application establishes an objective equation based on spatial coverage parameter requirements and beam overlap level requirements, with the overlap level difference as a function; wherein the overlap level difference is the difference between the array overlap level and the target overlap level. The target overlap level can be selected from adjacent beam overlap level values, inter-phase beam overlap level values, or the sum of both for optimization calculation, and the array overlap level is calculated as an array pattern function.

[0050] For example, the overlap level of adjacent beams can typically be 3dB, and the overlap level of inter-phase beams can typically be 13dB.

[0051] In some alternative embodiments, if a specified uniform wavefront distribution exists, the wavefront distribution optimization step can be skipped. In other words, before determining the original structural layout of the lens using geometric optics based on preset Rotman lens parameters and non-uniform wavefront distribution, i.e. before the aforementioned S130, the non-uniform wavefront Rotman lens design method may further include:

[0052] S210, the non-uniformly distributed wave position can also be set based on a specified scanning angle value.

[0053] In the embodiments of this application, it can be understood that the original structural layout of the lens is determined by geometric optics based on the aforementioned non-uniformly distributed wave position. The non-uniformly distributed wave position can be calculated by an optimization algorithm based on the spatial coverage parameters and beam overlap level. The non-uniformly distributed wave position can also be set directly based on a specified scanning angle value.

[0054] In some embodiments, the target requirement information includes spatial coverage, adjacent beam overlap level requirements, and inter-beam overlap level requirements; the Rotman lens parameters include focal angle, focal ratio, and sine ratio. The target requirement information and Rotman lens parameters can be set according to the actual required structural layout.

[0055] For example, the airspace coverage range can be set to ±45 degrees as needed; the overlap level of adjacent beams is required to be less than 3dB, and the overlap level of inter-beams is required to be less than 13dB; in the Rotman lens parameters, the focal angle can be 22°, the focal ratio can be 1.06, and the sine ratio can be 1.7.

[0056] In some embodiments, the non-uniformly distributed wavefront is independent of the transmission line type implementing the Rotman lens, and the non-uniformly distributed wavefront is one of microstrip, stripline, and waveguide types.

[0057] In some embodiments, please refer to Figure 2 , Figure 2 The diagram shows a layout schematic of the target lens structure provided in an embodiment of this application. The target lens structure includes a lens 4, multiple array ports 1, multiple beam ports 2, and multiple sets of matching ports 3. The lens 4 has a symmetrical arc-shaped structure. The multiple array ports 1 are configured to connect to the periphery of the lens 4. The multiple beam ports 2 are connected to the periphery of the lens 4 and are arranged opposite to the multiple array ports 1. The multiple sets of matching ports 3 are sandwiched between the array ports 1 and the beam ports 2.

[0058] Understandably, the structural layout of the target lens is determined using the aforementioned non-uniform wavefront Rotman lens design method. Based on the wavefront distribution and relevant lens design parameters, including a focal angle of 22°, a focal ratio of 1.06, and a sine ratio of 1.7, the original lens structural layout is obtained using geometric optics methods. Finally, full-wave simulation of the original lens structure is performed using electromagnetic simulation software, and the lens structural layout is adjusted based on the simulation results to obtain the final lens structural layout.

[0059] In some embodiments, each set of matching ports 3 consists of a plurality of matching resistors, each matching resistor having a first end adjacent to the lens 4 and a second end away from the lens 4, and the width of the matching resistor decreasing from the first end to the second end along its own extending direction.

[0060] In one example, please refer to Figure 2 Each set of matching ports 3 can be configured with 5 spaced matching resistors. Multiple sets of matching ports 3 are arranged in two pairs. The first pair of matching ports 3 is adjacent to array port 1, and the corresponding matching resistor is constructed in a broken line shape. The second pair of matching ports 3 is adjacent to beam port 2, and the corresponding matching resistor is constructed in a straight line shape.

[0061] To make the objectives, technical solutions, and advantages of this application clearer, a 1×32 linear array, in conjunction with specific embodiments and accompanying drawings, will be used to provide a further detailed description of this application.

[0062] The airspace coverage range should be ±45 degrees. The overlap level between adjacent beams should be less than 3dB, and the overlap level between phase beams should be less than 13dB. Please refer to [reference needed]. Figure 3 , Figure 3 The diagram illustrates the overlap level distribution obtained using the traditional uniform beamwidth design method. This method requires at least 28 beams to achieve the required spatial coverage and overlap level. Please refer to... Figure 4 , Figure 4 The diagram shows the overlapping level distribution obtained by using the non-uniform wave position Rotman lens design method provided in the embodiments of this application. The aforementioned wave position optimization algorithm adopts a genetic optimization algorithm, which can obtain the following non-uniform wave position distribution: -43.9°, -39.5°, -5.3°, -1.4°, -7.6°, -4°, -0.4°, -7°, -13.5°, -10.1°, -6.7°, -3.4°, 0°, 3.4°, 6.7°, 10.1°, 13.5°, 17°, 20.4°, 24°, 27.6°, 31.4°, 35.3°, 39.5°, 43.9°. There are a total of 25 beams in the non-uniform wave position distribution, and the overlapping level is relatively uniform.

[0063] The normalized beam pattern obtained from the full-wave simulation is as follows: Figure 5 As shown, the overlapping positions of adjacent and alternating beams are relatively consistent. A comparison of beam overlap levels between full-wave simulation and calculation is provided. Figure 6 As shown, the two are basically the same.

[0064] In some embodiments, this application provides a non-uniform wavefront Rotman lens design system 300, such as Figure 7 As shown, the non-uniform wavefront Rotman lens design system 300 may include the following modules:

[0065] The acquisition module 310 is used to acquire target requirement information related to spatial coverage parameters and beam overlap levels;

[0066] The first determining module 320 is used to determine the required non-uniformly distributed wave positions based on the target requirement information and using a wave position optimization algorithm; wherein, the non-uniformly distributed wave positions correspond to the beam ports of the Rotman lens;

[0067] The second determining module 330 is used to determine the original structural layout of the lens by using geometric optics based on preset Rotman lens parameters and non-uniformly distributed wave positions.

[0068] Simulation module 340 is used to perform full-wave simulation of the original structural layout using electromagnetic simulation technology to obtain simulation results;

[0069] The optimization and adjustment module 350 is used to optimize and adjust the original structural layout based on the simulation results to obtain the target lens structure that meets the design requirements.

[0070] According to embodiments of this application, any and multiple modules among the acquisition module 310, the first determination module 320, the second determination module 330, the simulation module 340, and the optimization and adjustment module 350 can be combined into one module, or any one of these modules can be split into multiple modules. Alternatively, at least some of the functions of one or more of these modules can be combined with at least some of the functions of other modules and implemented in one module.

[0071] Figure 7 Each module in the system shown has the function of implementing each step in the aforementioned non-uniform wave position Rotman lens design method, and can achieve the corresponding technical effect. For the sake of brevity, it will not be elaborated here.

[0072] In some embodiments, this application provides an electronic device, the structural schematic of which is shown below. Figure 8 As shown.

[0073] The electronic device may include a processor 410 and a memory 420 storing computer program instructions.

[0074] Specifically, the processor 410 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0075] Memory 420 may include mass storage for data or instructions. For example, and not limitingly, memory 420 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 420 may include removable or non-removable (or fixed) media. Where appropriate, memory 420 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 420 is non-volatile solid-state memory.

[0076] Memory 420 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Therefore, typically, memory 420 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it can perform the operations described in any of the non-uniform wavelength Rotman lens design methods in the above embodiments.

[0077] The processor 410 reads and executes computer program instructions stored in the memory 420 to implement any of the non-uniform wave position Rotman lens design methods in the above embodiments.

[0078] In one example, the electronic device may also include a communication interface 430 and a bus 400. For example, Figure 8 As shown, the processor 410, memory 420, and communication interface 430 are connected via bus 400 and communicate with each other.

[0079] The communication interface 430 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0080] Bus 400 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 400 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0081] Furthermore, in conjunction with the non-uniform wavelength Rotman lens design method in the above embodiments, this application embodiment can provide a computer storage medium for implementation. This computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the non-uniform wavelength Rotman lens design methods in the above embodiments.

[0082] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0083] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0084] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0085] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0086] In summary, compared with the prior art, this application has the following beneficial effects:

[0087] 1. Based on the required non-uniformly distributed wave position and some preset Rotman lens parameters, this application determines the original structural layout of the Rotman lens, and then performs full-wave simulation on the original structural layout. Based on the simulation results, the original structural layout can be optimized and adjusted until the ideal target lens structure is obtained.

[0088] 2. This application can achieve consistent adjacent beam overlap levels, solving the problems of inconsistent adjacent beam overlap levels and beam redundancy caused by uniform beam position Rotman lenses; it achieves the same spatial coverage with fewer beam positions, thereby reducing the number of analog and digital receiving channels at the back end of the lens and reducing costs.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a non-uniform wavefront Rotman lens, characterized in that, include: Obtain target requirement information related to spatial coverage parameters and beam overlap levels; Based on the target requirements, the required non-uniformly distributed beam positions are determined using a beam position optimization algorithm. Based on the spatial coverage parameter requirements and beam overlap level requirements, a target equation is established with the overlap level difference as a function. The overlap level difference is the difference between the array overlap level and the target overlap level. The target overlap level can be selected from adjacent beam overlap level values, inter-phase beam overlap level values, or the sum of both for optimization calculation. The non-uniformly distributed beam positions correspond to the beam ports of the Rotman lens. Based on the preset Rotman lens parameters and the non-uniformly distributed wave positions, the original structural layout of the lens is determined by geometric optics; the target requirement information and Rotman lens parameters are set according to the actual required structural layout. The original structural layout was simulated using electromagnetic simulation technology to obtain simulation results. Based on the simulation results, the original structural layout is optimized and adjusted to obtain the target lens structure that meets the design requirements; The target lens structure includes a lens, multiple array ports, multiple beam ports, and multiple sets of matching ports; wherein, the multiple array ports are configured to connect to the periphery of the lens; the multiple beam ports are connected to the periphery of the lens and are disposed opposite to the multiple array ports; the multiple sets of matching ports are sandwiched between the array ports and the beam ports; Each set of matching ports consists of multiple matching resistors, each of which has a first end adjacent to the lens and a second end away from the lens, and the width of the matching resistor decreases from the first end to the second end along its own extension direction. The multiple sets of matching ports are arranged in two pairs. The first pair of matching ports is adjacent to the array port, and the corresponding matching resistor is constructed in a zigzag shape. The second pair of matching ports is adjacent to the beam port, and the corresponding matching resistor is constructed in a straight line shape.

2. The non-uniform wavefront Rotman lens design method as described in claim 1, characterized in that, The target requirements include spatial coverage, adjacent beam overlap level requirements, and phase beam overlap level requirements.

3. The non-uniform wavefront Rotman lens design method as described in claim 1 or 2, characterized in that, The Rotman lens parameters include focal angle, focal ratio, and sine ratio.

4. The non-uniform wavefront Rotman lens design method as described in claim 1 or 2, characterized in that, The non-uniformly distributed wave position is independent of the transmission line type used to implement the Rotman lens, and the non-uniformly distributed wave position can be one of microstrip, stripline, or waveguide.

5. A non-uniform wavefront Rotman lens design system, characterized in that, include: The acquisition module is used to acquire target requirement information related to spatial coverage parameters and beam overlap levels; The first determining module is used to determine the required non-uniformly distributed beam positions based on the target requirement information using a beam position optimization algorithm; and to establish a target equation with the overlap level difference as a function based on the spatial coverage parameter requirements and beam overlap level requirements; the overlap level difference is the difference between the array overlap level and the target overlap level; the target overlap level can be selected from adjacent beam overlap level values, inter-phase beam overlap level values, or the sum of both for optimization calculation; wherein, the non-uniformly distributed beam positions correspond to the beam ports of the Rotman lens; The second determining module is used to determine the original structural layout of the lens using geometric optics based on preset Rotman lens parameters and the non-uniformly distributed wave position; the target requirement information and Rotman lens parameters are set according to the actual required structural layout. The simulation module is used to perform full-wave simulation of the original structural layout using electromagnetic simulation technology to obtain simulation results. The optimization and adjustment module is used to optimize and adjust the original structural layout based on the simulation results to obtain a target lens structure that meets the design requirements. The target lens structure includes a lens, multiple array ports, multiple beam ports, and multiple sets of matching ports; wherein, the multiple array ports are configured to connect to the periphery of the lens; the multiple beam ports are connected to the periphery of the lens and are disposed opposite to the multiple array ports; the multiple sets of matching ports are sandwiched between the array ports and the beam ports; Each set of matching ports consists of multiple matching resistors, each of which has a first end adjacent to the lens and a second end away from the lens, and the width of the matching resistor decreases from the first end to the second end along its own extension direction. The multiple sets of matching ports are arranged in two pairs. The first pair of matching ports is adjacent to the array port, and the corresponding matching resistor is constructed in a zigzag shape. The second pair of matching ports is adjacent to the beam port, and the corresponding matching resistor is constructed in a straight line shape.

6. An electronic device, characterized in that, include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the non-uniform wave position Rotman lens design method as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that, when executed by a processor, implement the non-uniform wavefront Rotman lens design method as described in any one of claims 1 to 4.

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