Design and preparation method of electromagnetic equivalent physical model of high-temperature antenna housing

Abstract

The invention discloses a design and preparation method of an electromagnetic equivalent physical model of a high-temperature radome, and the method achieves the precise simulation of the aiming error of the high-temperature radome under a high-speed flight condition at a normal temperature through attaching a dielectric sheet with a specific thickness to the surface of the normal-temperature radome to simulate the increase of the electric thickness of the radome wall caused by the dielectric temperature drift of a material. The method comprises the following steps: simulating to obtain an instantaneous temperature field of the antenna housing under the action of a flight aerodynamic thermal load; selecting a typical time point according to the instantaneous temperature field; performing sub-partition segmentation on the outer surface of the antenna housing; calculating the thickness of a sub-partition dielectric slice based on a high-frequency method; sub-partition dielectric slices are prepared; and attaching the sub-partition dielectric slices. According to the method, a reliable physical model is provided for semi-physical simulation and aiming error compensation of the high-speed aircraft guidance system, and the problem of space-ground consistency faced by ground semi-physical simulation test and antenna housing aiming error compensation of the current high-speed aircraft guidance system can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of radome technology, and in particular to a design and fabrication method for a physical model of the electromagnetic equivalent of a high-temperature radome that takes into account the dielectric temperature drift effect. Background Technology

[0002] To enhance penetration and long-range precision strike capabilities, aircraft are evolving towards higher speeds, greater ranges, and higher detection and guidance accuracy. Precision detection and guidance equipment, acting as the "brain" and "eyes" of the aircraft, is typically located at the front of the vehicle and mostly employs radio frequency detection and guidance technology to highlight its all-weather detection capabilities. This places significant demands on the high performance of the matching protective radome. The radome protects the detection and guidance equipment, is located at the front of the aircraft, constitutes the aircraft's aerodynamic shape, and is also a crucial coupling link for the detection and guidance equipment. The radome typically consists mainly of a wave-transparent cover and connecting rings, and during high-speed flight within the atmosphere, it will withstand the most severe aerodynamic and thermal loads.

[0003] Currently, hardware-in-the-loop simulations of aircraft guidance systems and radome aiming error compensation are typically conducted at room temperature, without considering the effects of actual flight aerodynamic and thermal loads. However, during actual operation of the guidance system, the aircraft is in high-speed flight, and the dielectric temperature drift of the radome material, influenced by flight aerodynamic and thermal loads, induces a drift in its electromagnetic properties, leading to deviations in electrical performance from the original design values. Therefore, radome models under actual flight conditions should be used in hardware-in-the-loop simulations and aiming error compensation tests of guidance systems. However, due to limitations in testing technology, applying corresponding thermal loads to the radome during hardware-in-the-loop simulations and aiming error compensation tests is very difficult. With the continuous increase in aircraft flight speed and the ever-increasing requirements for guidance accuracy, there is an urgent need to develop a physical model that can equivalently represent the electromagnetic characteristics of the radome under actual high-speed flight conditions. This model would provide a realistic and reliable physical radome model for ground simulation testing and aiming error compensation of guidance systems, thereby effectively ensuring the consistency between simulation testing and error compensation between ground and air.

[0004] Quartz ceramics, silicon nitride ceramics, and other wave-transparent ceramics are currently the most widely used materials for high-speed aircraft radomes due to their excellent temperature resistance and stiffness. However, their dielectric constant and conductivity increase with temperature, and rise sharply when the temperature exceeds a certain threshold. As flight speeds continue to increase, ground simulation testing and aiming error compensation for high-speed aircraft guidance systems increasingly need to consider the impact of dielectric temperature drift of materials during flight. Summary of the Invention

[0005] Based on the above, the purpose of this invention is to provide a design and fabrication method for an electromagnetic equivalent physical model of a high-temperature radome that considers the dielectric temperature drift effect. By attaching a dielectric sheet of a specific thickness to the surface of the radome at room temperature to simulate the increase in the electrical thickness of the radome wall caused by the dielectric temperature drift of the material, the aiming error of the high-temperature radome under high-speed flight conditions is accurately simulated at room temperature.

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

[0007] In a first aspect, embodiments of this application provide a design method for an electromagnetic equivalent physical model of a high-temperature radome, characterized by comprising the following steps:

[0008] The instantaneous temperature field of the radome under the aerodynamic and thermal loads of flight was obtained through simulation.

[0009] Select typical time points based on the instantaneous temperature field;

[0010] The outer surface of the radome is divided into sub-regions;

[0011] The dielectric thickness of the sub-partition is calculated based on the high-frequency method and the temperature data at the typical time points.

[0012] In one alternative, the aerodynamic heat load is: time-varying cold wall heat flux, recovery enthalpy, and pressure; or time-varying hot wall heat flux; or time-varying temperature.

[0013] In one alternative approach, the typical time point should firstly be located within the operating period of the guidance system, and secondly, the temperature response should be highest at the typical time point.

[0014] In one alternative approach, the sub-regional segmentation of the radome's outer surface specifically involves: firstly, dividing the radome's outer surface axially into N sub-regions S. n To ensure the fit and equivalent accuracy between the dielectric sheet and the cover, the height of the dielectric sheet must not exceed one vacuum working wavelength λ0; then each sub-region S n Further divide it into M sub-partitions S along the circumference. n,m .

[0015] In one alternative approach, each of the sub-regions S n The sub-partition S n,m The number of elements is no less than four.

[0016] In one alternative approach, the calculation of the dielectric sheet thickness of the sub-partition based on a high-frequency method has...

[0017] Body is:

[0018] Based on the local planar approximation theory, the electromagnetic waves emitted by the radar antenna illuminate each of the aforementioned sub-regions S. n,m

[0019] The sub-section S is approximately a plane wave incident on a medium plate. n,m Incident point I on the inner surface n,m For: through the sub-partition S n,m The point where the normal n of the inner surface at the center of the outer surface intersects with the inner surface, and the angle of incidence θ. n,m The incident point I n,m The line OI connecting the center point of the antenna aperture n,m The angle between the angle and the inner normal n;

[0020] By adjusting the thickness of the dielectric sheet, the state of a plane wave after passing through a room-temperature electromagnetic equivalent physical model is made the same as its state after passing through a high-temperature radome during high-speed flight, i.e.:

[0021]

[0022] in, For the incident electric field, and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-region S. n,m The voltage complex transmission coefficient;

[0023] Based on the temperature gradient distribution and the dielectric temperature drift characteristics of the radome material, the high-temperature antenna radome is divided into S sections. n,m

[0024] The wall of the cover is equivalent to N s A non-uniform dielectric plate; and the sub-region S of the electromagnetic equivalent physical model. n,m Considering it as a double-layer dielectric plate, for both multilayer and double-layer dielectric plates, the equivalent transmission line method is used to calculate...

[0025] The calculation yielded the above and

[0026] With the thickness of the dielectric sheet To design variables, define the objective function.

[0027]

[0028] Among them, K A K P These are weighting coefficients, where V and H represent the vertical and parallel polarization components of the incident plane wave, respectively. These represent the power transfer coefficient deviations for the vertically polarized component and the parallelly polarized component, respectively. Insertion phase shift biases for vertical polarization components and parallel polarization components, respectively. The calculation expressions for the above variables are as follows:

[0029]

[0030] In the formula, the identifier S represents V or H. and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-region S. n,m The voltage complex transmission coefficient, and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-region S. n,m The insertion phase, This corresponds to the insertion phase shift;

[0031] The optimal thickness of the dielectric sheet is obtained through iterative optimization. Make the objective function The minimum value is obtained, that is, the state of the plane wave after passing through the electromagnetic equivalent physical model at room temperature is closest to its state after passing through the actual high-temperature antenna radome.

[0032] Secondly, embodiments of this application provide a method for preparing an electromagnetic equivalent physical model of a high-temperature radome, based on the design method described in any of the above claims, comprising:

[0033] The preparation of the sub-partition dielectric sheet is specifically as follows: the dielectric sheet is selected from a low-loss, flexible dielectric material whose relative permittivity at room temperature is close to that of the antenna radome material. The flexible dielectric sheet forming process includes hot pressing, injection molding and extrusion.

[0034] For a ring-shaped dielectric patch, the sub-partition S n,m The aforementioned annular dielectric sheet is approximately unfolded into a planar structure and fabricated by cutting a dielectric film of corresponding thickness. For cases where the outer surface of the radome is non-expandable, to ensure the conformality and fit between the dielectric sheet and the radome, the height h of the sub-region must be specified during sub-region division. n,m It cannot be too large, so that the shape curve of the sub-region is approximately a straight line, and thus the outer surface of the sub-region can be approximately an expandable surface;

[0035] The planar unfolded structural dimensions of the dielectric sheet can be calculated using the following formula:

[0036]

[0037] In the formula, y n,m1 y n,m2 h n,m All of these are known quantities.

[0038] In one alternative approach, the sub-partition dielectric sheet is attached to the sub-partition corresponding to the radome, specifically by first attaching each sub-partition S... n The sub-partition S n,m The dielectric sheet is assembled into a complete dielectric ring by bonding, and then the dielectric ring is fitted onto the outer surface of the radome.

[0039] Thirdly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the steps of any of the design methods and preparation methods described above.

[0040] Fourthly, embodiments of this application provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the program, it implements the steps of any of the design methods and fabrication methods described above.

[0041] The present invention discloses the following technical effects:

[0042] This invention solves the problem of how to equivalently simulate the changes in aiming error induced by dielectric temperature drift of the radome material under high-speed flight conditions. By attaching a dielectric sheet of a specific thickness to the surface of the radome at room temperature, the increase in the electrical thickness of the radome wall caused by dielectric temperature drift is simulated. This achieves accurate simulation of the aiming error of the high-temperature radome under high-speed flight conditions at room temperature, providing a reliable physical model for the hardware-in-the-loop simulation and aiming error compensation of high-speed aircraft guidance systems. It can effectively solve the problem of consistency between ground and space in the current ground hardware-in-the-loop simulation test and radome aiming error compensation of high-speed aircraft guidance systems. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating the design and fabrication method of a high-temperature radome electromagnetic equivalent physical model provided in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the construction of the electromagnetic equivalent physical model of the high-temperature radome provided in the embodiment of the present invention;

[0046] Figure 3 The high-temperature radome and its electromagnetic equivalent physical model provided in this embodiment of the invention are located in sub-partition S. n,mA partial equivalent schematic diagram;

[0047] Figure 4 This is a schematic diagram of the planar unfolding of the annular dielectric sheet provided in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the computer device structure provided in an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of a computer-readable storage medium structure provided in an embodiment of the present invention. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0051] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0054] This application provides a method for designing and fabricating a physical electromagnetic equivalent model of a high-temperature radome that considers the dielectric drift effect. This method simulates the increase in radome wall electrical thickness caused by dielectric drift by attaching a dielectric sheet of appropriate thickness to the radome surface at room temperature. This achieves accurate simulation of the aiming error of the high-temperature radome under actual high-speed flight conditions at room temperature, solving the problem that current ground-based hardware-in-the-loop simulation testing and evaluation of guidance and control systems for hypersonic vehicles struggles to consider the changes in aiming error induced by high-temperature dielectric drift of the radome material under high-speed flight conditions. Specific steps are as follows... Figure 1 As shown, it includes:

[0055] S110: Simulation obtains the instantaneous temperature field of the radome under the action of flight aerodynamic thermal load;

[0056] S120: Select typical time points based on the instantaneous temperature field;

[0057] S130: Sub-division of the outer surface of the radome;

[0058] S140: Calculate the dielectric sheet thickness of sub-partitions based on high-frequency method and typical time points;

[0059] S150: Sub-partitioned media wafer fabrication;

[0060] S160: Sub-partition media sheet attachment.

[0061] It should be noted that before step S110, the variation of the physical properties of the radome material with temperature is determined experimentally; the aforementioned physical properties of the radome material can also be obtained through other means. The aforementioned physical properties of the radome material include: relative permittivity, loss tangent, thermal conductivity, specific heat capacity, and density. In step S110, a commercial thermal simulation model of the radome is established using commercial thermal simulation software, and transient thermal simulation is performed based on this model to obtain the instantaneous temperature field.

[0062] Preferably, the aerodynamic heat load in step S110 is: cold wall heat flux, recovery enthalpy and pressure varying with time; or, hot wall heat flux varying with time; or, temperature varying with time.

[0063] Preferably, the typical time point in step S120 should first be located within the working period of the guidance system to verify and calibrate the performance of the guidance loop under real working conditions; secondly, the temperature response is highest at the typical time point, thereby ensuring that the design of the present invention can cover the worst working conditions.

[0064] Preferably, in step S130, as follows Figure 2 As shown, the outer surface of the radome is divided into sub-regions. First, the outer surface of the radome is divided into N sub-regions (S1, S2, ... S) along the axial direction.n ,…S N To ensure proper fit and equivalent accuracy between the dielectric sheet and the cover, the height of the dielectric sheet should generally not exceed one vacuum working wavelength λ0. Then, each sub-region S... n Further divide it into M sub-partitions S along the circumference. n,m Each sub-region generally has no fewer than four sub-regions.

[0065] Preferably, in step 140, calculating the thickness of the sub-region dielectric sheet based on the high-frequency method includes:

[0066] Based on the local planar approximation theory, the electromagnetic waves emitted by the radar antenna illuminate each sub-region S. n,m Approximately a plane wave incident on a flat medium, sub-division S n,m Incident point I on the inner surface n,m For: via sub-partition S n,m The point where the normal n of the inner surface at the center of the outer surface intersects with the inner surface, and the angle of incidence θ. n,m Point of incidence I n,m The line OI connecting the center point of the antenna aperture n,m The angle between the vector and the inner normal n. Divide the vector into sub-regions S. n,m For example, by rationally designing the thickness of the dielectric sheet, the state of a plane wave after passing through a room-temperature electromagnetic equivalent physical model is the same as its state after passing through a high-temperature radome during high-speed flight, that is:

[0067]

[0068] In the formula, For the incident electric field, and These represent the voltage complex transmission coefficients of the high-temperature radome and its electromagnetic equivalent physical model in sub-region Sn,m, respectively. Based on the temperature gradient distribution and the dielectric temperature drift characteristics of the radome material, the wall of the high-temperature radome sub-region Sn,m is equivalent to N. s A multilayer non-uniform dielectric plate; while the sub-partition Sn,m of the electromagnetic equivalent physical model can be regarded as a bilayer dielectric plate. For multilayer and bilayer dielectric plates, such as... Figure 3 As shown, using the equivalent transmission line method, the following can be calculated respectively: and Based on the thickness of the dielectric sheet Define the objective function for the design variables:

[0069]

[0070] In the formula, K A K P These are weighting coefficients, where V and H represent the vertical and parallel polarization components of the incident plane wave, respectively. These represent the power transfer coefficient deviations for the vertically polarized component and the parallelly polarized component, respectively. Insertion phase shift biases for vertical polarization components and parallel polarization components, respectively. The calculation expressions for the above variables are as follows:

[0071]

[0072] In the formula, the identifier S represents V or H. and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-region S. n,m The voltage complex transmission coefficient, and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-region S. n,m The insertion phase, This corresponds to the insertion phase shift. Based on engineering experience, in optimization design, while prioritizing amplitude approximation, phase approximation should be considered as much as possible. Therefore, K is generally required to... A Value ratio K P The value is much larger. Through iterative optimization, the optimal thickness of the dielectric sheet can be obtained. Make the objective function The minimum value is obtained, that is, the state of the plane wave after passing through the electromagnetic equivalent physical model at room temperature is closest to its state after passing through the actual high-temperature antenna radome.

[0073] Preferably, in step 150, regarding the preparation of the sub-dielectric sheet, the dielectric sheet is selected from a low-loss, flexible dielectric material whose relative permittivity at room temperature is close to that of the antenna radome material. The flexible dielectric sheet can be prepared using various processes such as hot pressing, injection molding, extrusion, and other molding techniques. For annular dielectric patches, they can be quickly fabricated by cutting commonly used dielectric films, such as... Figure 4 As shown, sub-partition S n,m The annular dielectric sheet can be approximately unfolded into a planar structure, which can be fabricated by cutting a dielectric film of corresponding thickness. For cases where the outer surface of the radome is non-expandable, to ensure the conformality and fit between the dielectric sheet and the radome, the height h of the sub-region must be specified during sub-region division. n,m It cannot be too large, so that the shape curve of the sub-region can be approximated as a straight line, and thus the outer surface of the sub-region can be approximated as an expandable surface. The planar unfolded structural dimensions of the dielectric sheet can be calculated using equation (4):

[0074]

[0075] In the formula, y n,m1 y n,m2 h n,m All of these are known quantities.

[0076] Preferably, in step 160, regarding the attachment of sub-partition media sheets, firstly, each sub-partition S... n Subpartition S n,m The dielectric sheets are assembled into a complete dielectric ring by bonding with thin adhesive tape, and then the dielectric ring is fitted onto the outer surface of the radome, thereby completing the design, fabrication and attachment of the electromagnetic equivalent physical model of the high-temperature radome.

[0077] This invention solves the problem of how to equivalently simulate the changes in aiming error induced by dielectric temperature drift of the radome material under high-speed flight conditions. By attaching a dielectric sheet of a specific thickness to the surface of the radome at room temperature, the increase in the electrical thickness of the radome wall caused by dielectric temperature drift is simulated. This achieves accurate simulation of the aiming error of the high-temperature radome under high-speed flight conditions at room temperature, providing a reliable physical model for the hardware-in-the-loop simulation and aiming error compensation of high-speed aircraft guidance systems. It can effectively solve the problem of consistency between ground and space in the current ground hardware-in-the-loop simulation test and radome aiming error compensation of high-speed aircraft guidance systems.

[0078] Based on the same inventive concept, this embodiment provides a computer device, such as... Figure 5 As shown, it includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any step of the method described above.

[0079] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as... Figure 6 As shown, a computer program is stored thereon, which, when executed by a processor, implements any step of the method described above.

[0080] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0081] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A design method for a physical model of the electromagnetic equivalent of a high-temperature radome, characterized in that, Includes the following steps: The instantaneous temperature field of the radome under the aerodynamic and thermal loads of flight was obtained through simulation. Select typical time points based on the instantaneous temperature field; The outer surface of the radome is divided into sub-regions; The dielectric thickness of the sub-partition is calculated based on the high-frequency method and the temperature data at the typical time points.

2. The method according to claim 1, characterized in that, The aerodynamic heat load is: time-varying cold wall heat flux, recovery enthalpy, and pressure; or time-varying hot wall heat flux; or time-varying temperature.

3. The method according to claim 1, characterized in that, The typical time point should first be located within the operating period of the guidance system, and secondly, the temperature response should be highest at the typical time point.

4. The method according to claim 1, characterized in that, The sub-regional segmentation of the radome's outer surface specifically involves: firstly, dividing the radome's outer surface axially into N sub-regions S. n To ensure the fit and equivalent accuracy between the dielectric sheet and the cover, the height of the dielectric sheet must not exceed one vacuum working wavelength λ0; then each sub-region S n Further divide it into M sub-partitions S along the circumference. n,m .

5. The method according to claim 4, characterized in that, Each of the sub-regions S n The sub-partition S n,m The number of elements is no less than four.

6. The method according to claim 4, wherein calculating the dielectric thickness of the sub-partition based on the high-frequency method specifically comprises: Based on the local planar approximation theory, the electromagnetic waves emitted by the radar antenna illuminate each of the aforementioned sub-regions S. n,m The sub-section S is approximately a plane wave incident on a medium plate. n,m Incident point I on the inner surface n,m For: through the sub-partition S n,m The point where the normal n of the inner surface at the center of the outer surface intersects with the inner surface, and the angle of incidence θ. n,m The incident point I n,m The line OI connecting the center point of the antenna aperture n,m The angle between the angle and the inner normal n; By adjusting the thickness of the dielectric sheet, the state of a plane wave after passing through a room-temperature electromagnetic equivalent physical model is made the same as its state after passing through a high-temperature radome during high-speed flight, i.e.: in, For the incident electric field, and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-partition S. n,m Voltage complex transmission coefficient; Based on the temperature gradient distribution and the dielectric temperature drift characteristics of the radome material, the high-temperature antenna radome is divided into S sections. n,m The wall of the cover is equivalent to N s A non-uniform dielectric plate; and the sub-region S of the electromagnetic equivalent physical model. n,m Considering it as a double-layer dielectric plate, the equivalent transmission line method is used to calculate the following for both multilayer and double-layer dielectric plates: and With the thickness of the dielectric sheet To design variables, define the objective function. Among them, K A K P These are weighting coefficients, where V and H represent the vertical and parallel polarization components of the incident plane wave, respectively. These represent the power transfer coefficient deviations for the vertically polarized component and the parallelly polarized component, respectively. Insertion phase shift biases for vertical polarization components and parallel polarization components, respectively. The calculation expressions for the above variables are as follows: In the formula, the identifier S represents V or H. and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-partition S. n,m The voltage complex transmission coefficient, and The high-temperature radome and its electromagnetic equivalent physical model are respectively located in sub-partition S. n,m The insertion phase, This corresponds to the insertion phase shift; The optimal thickness of the dielectric sheet is obtained through iterative optimization. Make the objective function The minimum value is obtained, that is, the state of the plane wave after passing through the electromagnetic equivalent physical model at room temperature is closest to its state after passing through the actual high-temperature antenna radome.

7. A method for preparing an electromagnetic equivalent physical model of a high-temperature radome, based on the design method according to any one of claims 1 to 6, characterized in that, include: The preparation of the sub-partition dielectric sheet is specifically as follows: the dielectric sheet is selected from a low-loss, flexible dielectric material whose relative permittivity at room temperature is close to that of the antenna radome material. The flexible dielectric sheet forming process includes hot pressing, injection molding and extrusion. For a ring-shaped dielectric patch, the sub-partition S n,m The aforementioned annular dielectric sheet is approximately unfolded into a planar structure and fabricated by cutting a dielectric film of corresponding thickness. For cases where the outer surface of the radome is non-expandable, to ensure the conformality and fit between the dielectric sheet and the radome, the height h of the sub-region must be specified during sub-region division. n,m It cannot be too large, so that the shape curve of the sub-region is approximately a straight line, and thus the outer surface of the sub-region can be approximately an expandable surface; The planar unfolded structural dimensions of the dielectric sheet can be calculated using the following formula: In the formula, y n,m1 y n,m2 h n,m All of these are known quantities.

8. The method according to claim 7, characterized in that, The sub-partition dielectric sheet is attached to the sub-partition corresponding to the radome, specifically by first attaching each sub-partition S... n The sub-partition S n,m The dielectric sheet is assembled into a complete dielectric ring by bonding, and then the dielectric ring is fitted onto the outer surface of the radome.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1-8.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method according to any one of claims 1-8.

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