High-speed differential cable construction method and device, computer equipment and storage medium

Abstract

The application discloses a high-speed differential cable construction method and device, computer equipment and a storage medium. The method comprises the following steps: obtaining a plurality of high-speed differential cable models with different structures; performing full-wave electromagnetic simulation on the high-speed differential cable models under the same simulation condition to obtain transmission parameters corresponding to each high-speed differential cable model; determining resonance frequency points of each high-speed differential cable model in a target frequency band based on the transmission parameters; analyzing the resonance frequency points in combination with structure parameters of the high-speed differential cable models to establish a corresponding relationship between the structure parameters and the resonance frequency; determining at least one target structure parameter according to the corresponding relationship, and constructing a target high-speed differential cable model based on the at least one target structure parameter. The design efficiency, resonance avoidance capability and signal transmission reliability of the high-speed differential cable can be significantly improved.

Description

Technical Field

[0001] This invention relates to the field of high-speed signal integrity, and more particularly to a method, apparatus, computer equipment, and storage medium for constructing high-speed differential cables. Background Technology

[0002] With the continuous development of high-speed data transmission technology, differential cables, as a common high-speed interconnect medium, are widely used in audio and video transmission, data communication, industrial control, and equipment interconnection. As operating frequencies increase, high-speed differential signals are susceptible to conductor loss, dielectric loss, skin effect, and proximity effect during transmission, leading to increased insertion loss and waveform distortion, thus limiting channel bandwidth and reducing transmission reliability. Furthermore, practical cable structures commonly exhibit common-mode current paths introduced by the shielding layer, coupling between differential pairs, and standing waves and reflections caused by periodic structures. These factors can induce significant electromagnetic resonances in specific frequency bands, causing fluctuations in transmission performance or even sudden attenuation, thereby affecting the system's signal integrity and electromagnetic compatibility performance.

[0003] In existing technologies, to improve the transmission quality of high-speed differential links, optimization is typically performed across multiple dimensions, including conductor materials, dielectric materials, shielding structures, fabrication processes, and receiver equalization. However, these optimizations often rely on engineering experience or multiple rounds of trial and error iterations, making it difficult to quantitatively assess the impact of different structural parameters (such as dielectric layer parameters, differential pair spacing, stranding pitch, and shielding length) on the resonant frequency. Engineers typically have to repeatedly build models, perform frequency sweep simulations, and compare transmission curves to determine the resonant location, resulting in long development cycles, low design efficiency, and a high risk of inappropriate structural parameter selection leading to resonance falling within the target frequency band.

[0004] Therefore, there is an urgent need for a high-speed differential cable construction method that can quickly determine the target structural parameters and construct a target high-speed differential cable model accordingly, so as to effectively avoid the signal integrity risks caused by structural resonance. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, computer equipment, and storage medium for constructing high-speed differential cables to address the aforementioned technical problems. This method has the advantage of quickly determining the target structural parameters and constructing a target high-speed differential cable model accordingly, thereby effectively avoiding the signal integrity risks caused by structural resonance.

[0006] A method for constructing a high-speed differential cable, the method comprising: Obtain high-speed differential cable models with various structures; Under the same simulation conditions, full-wave electromagnetic simulation was performed on the high-speed differential cable model to obtain the transmission parameters corresponding to each high-speed differential cable model. The resonant frequency of each high-speed differential cable model in the target frequency band is determined based on the transmission parameters. Based on the structural parameters of the high-speed differential cable model, the resonant frequency is analyzed analytically to establish the correspondence between the structural parameters and the resonant frequency. Based on the correspondence, at least one target structural parameter is determined, and a target high-speed differential cable model is constructed based on the at least one target structural parameter.

[0007] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. Obtaining multiple high-speed differential cable models with different structures includes: High-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure were established in the preset full-wave electromagnetic simulation software. When establishing the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure, and stranded structure, at least the model length, conductor radius, dielectric layer outer diameter, and sheathing form should be consistent, and the conductor material properties should be consistent with the dielectric material properties.

[0008] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. The step of performing full-wave electromagnetic simulation on the high-speed differential cable models under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model includes: The same frequency domain sweep range and sampling points are set for the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure and stranded structure. After setting the port excitation mode and boundary conditions respectively, the electromagnetic field solution is run to obtain the transmission parameters.

[0009] Optionally, the transmission parameters include differential insertion loss parameters, and determining the resonant frequency of each of the high-speed differential cable models in the target frequency band based on the transmission parameters includes: Determine the curves of the differential insertion loss parameters as a function of frequency for each of the aforementioned high-speed differential cable models; Determine the peak points and / or valley points within the target frequency band of the curve; The frequencies corresponding to the peak points and / or valley points are determined as the resonant frequencies.

[0010] Optionally, the step of performing analytical analysis on the resonant frequency point based on the structural parameters of the high-speed differential cable model to establish the correspondence between the structural parameters and the resonant frequency includes: Determine the effective dielectric constant of the high-speed differential cable model, and determine the propagation speed based on the effective dielectric constant; The common-mode resonant frequency is calculated based on the shielding layer length and the propagation speed. The differential mode resonant frequency is calculated based on the actual length of the straightened stranded wire and the propagation speed. The resonant frequency of the periodic structure is calculated based on the twist pitch and the propagation velocity. The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish a correspondence between the structural parameters and the resonant frequencies.

[0011] Optionally, the step of mapping the common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structural resonant frequency to the resonant frequency point to establish a correspondence between the structural parameters and the resonant frequency includes: The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish an initial correspondence between the structural parameters and the resonant frequencies. While keeping the conductor size unchanged, a secondary extruded dielectric layer is wrapped around the high-speed differential cable model with a primary extrusion structure to construct a high-speed differential cable model with a secondary extrusion structure. Under the same simulation conditions, a full-wave electromagnetic simulation was performed on the high-speed differential cable model of the secondary extrusion structure, and the resonant frequency of the high-speed differential cable model of the secondary extrusion structure in the target frequency band was determined. The resonant frequency of the high-speed differential cable model of the secondary extrusion structure is compared with the resonant frequency determined by the initial correspondence. The initial correspondence is updated based on the comparison results to obtain the correspondence between the structural parameters and the resonant frequency.

[0012] Optionally, determining at least one target structural parameter based on the correspondence, and constructing a target high-speed differential cable model based on the at least one target structural parameter, includes: Based on the correspondence, at least one candidate structural parameter combination is determined, and the candidate structural parameter combination includes at least the stranding pitch and / or the number of strands; Based on the combination of candidate structural parameters, a target high-speed differential cable model to be verified is constructed, and a full-wave electromagnetic simulation is performed on each of the target high-speed differential cable models to be verified under the same simulation conditions to determine the resonant frequency point of each target high-speed differential cable model to be verified in the target frequency band. The resonant frequency of each of the target high-speed differential cable models to be verified is compared and verified with the resonant frequency determined by the corresponding relationship. When the comparison result meets the preset deviation threshold, the corresponding candidate structural parameter combination is determined as the target structural parameter, and the target high-speed differential cable model is constructed based on the target structural parameter; The candidate structural parameter combinations include: reducing the number of strands to reduce the shielding layer length and the actual length of the straightened stranded wire simultaneously, and / or reducing the stranding pitch to reduce the shielding layer length and the actual length of the straightened stranded wire.

[0013] A high-speed differential cable construction apparatus, the apparatus comprising: The acquisition module is used to acquire high-speed differential cable models with various different structures. The simulation module is used to perform full-wave electromagnetic simulation on the high-speed differential cable model under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model. The determination module is used to determine the resonant frequency of each of the high-speed differential cable models in the target frequency band based on the transmission parameters; The analysis module is used to perform analytical analysis on the resonant frequency point by combining the structural parameters of the high-speed differential cable model, so as to establish the correspondence between the structural parameters and the resonant frequency; A construction module is used to determine at least one target structural parameter based on the correspondence, and to construct a target high-speed differential cable model based on the at least one target structural parameter.

[0014] A computer device includes a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, wherein the processor implements the above-described high-speed differential cable construction method when executing the computer-readable instructions.

[0015] A readable storage medium storing computer-readable instructions that, when executed by a processor, implement the above-described high-speed differential cable construction method.

[0016] The aforementioned high-speed differential cable construction method involves obtaining various high-speed differential cable models with different structures; performing full-wave electromagnetic simulation on these models under the same simulation conditions to obtain transmission parameters corresponding to each model; determining the resonant frequency of each model within the target frequency band based on these transmission parameters; analyzing the resonant frequency points using the structural parameters of the high-speed differential cable models to establish a correspondence between the structural parameters and the resonant frequencies; determining at least one target structural parameter based on this correspondence, and constructing a target high-speed differential cable model based on this parameter. By performing full-wave electromagnetic simulation on various high-speed differential cable models with different structures under the same simulation conditions, extracting transmission parameters, and determining the resonant frequency points within the target frequency band, and further analyzing and modeling the resonance mechanism using the cable structural parameters to establish a correspondence between the structural parameters and the resonant frequencies, this method enables rapid reverse engineering and determination of key structural parameters and construction of the target high-speed differential cable model based on the target frequency band requirements. This avoids the problems of long design cycles and uncontrollable resonance caused by traditional methods relying on experience and repeated trial and error, significantly improving the design efficiency, resonance avoidance capability, and signal transmission reliability of high-speed differential cables. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention 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.

[0018] Figure 1 This is a flowchart illustrating a high-speed differential cable construction method according to an embodiment of the present invention; Figure 2 This is the geometric model corresponding to the high-speed differential cable model of the one-time extrusion structure of this invention; Figure 3 This is the geometric model corresponding to the high-speed differential cable model of the secondary extrusion structure of this invention; Figure 4 This is the geometric model corresponding to the high-speed differential cable model of the stranded wire structure of this invention; Figure 5 This is a schematic diagram showing the transmission performance results of the high-speed differential cable models corresponding to the single-extrusion structure, double-extrusion structure, and stranded structure of the present invention. Figure 6 This is a schematic diagram of the differential insertion loss versus frequency curves under different combinations of dielectric thickness and conductor spacing in this invention; Figure 7 This is a schematic diagram illustrating the transmission performance of a high-speed differential cable model with a stranded wire structure under different parameters; Figure 8 This is a flowchart illustrating another high-speed differential cable construction method in one embodiment of the present invention; Figure 9 This is a schematic diagram of a high-speed differential cable construction device according to an embodiment of the present invention; Figure 10 This is a schematic diagram of a computer device according to an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0020] In one embodiment, such as Figure 1 As shown, a method for constructing a high-speed differential cable is provided, including the following steps: 101. Obtain high-speed differential cable models with various structures.

[0021] In this embodiment of the invention, various high-speed differential cable models with different structures are obtained. The core purpose is to allow for comparison of different structures in terms of cable geometry, dielectric covering method, and differential pair arrangement, so that the impact of different structures on transmission performance and resonance characteristics can be objectively compared in the subsequent simulation and analysis stages.

[0022] In a typical embodiment, different structures can cover three types of models: single-extrusion structure, double-extrusion structure, and stranded structure. The single-extrusion structure can be understood as a structure in which a single layer of dielectric is formed on the outside of the conductor and the relative position of the differential pairs is kept stable. The double-extrusion structure can be understood as a structure in which an outer layer of dielectric is superimposed on the basis of single extrusion or a more complete multi-layer dielectric structure is formed, thereby changing the effective dielectric environment and equivalent electrical dimensions. The stranded structure forms a periodic geometric structure by periodically twisting the differential pairs along the length direction, so that the propagation path and coupling state change regularly with position.

[0023] To ensure the interpretability and reproducibility of the comparison results, key irrelevant parameters can be standardized during modeling, such as cable length, conductor radius, dielectric layer outer diameter, basic form of sheathing, and material properties, so that the differences mainly stem from the structural type itself. Model acquisition can be achieved using parametric modeling with 3D full-wave electromagnetic simulation software. By establishing an editable set of geometric parameters, primary extrusion, secondary extrusion, and stranded structures can be generated and saved as independent model files, which can then be directly called and batch-run within the same simulation project. As another possible implementation, model acquisition can be linked to manufacturing process parameters, such as extrusion layer thickness, stranding pitch, and number of strands, as modeling entry points to achieve automatic generation and rapid iteration of the structural model.

[0024] 102. Under the same simulation conditions, perform full-wave electromagnetic simulation on the high-speed differential cable model to obtain the transmission parameters corresponding to each high-speed differential cable model.

[0025] In this embodiment of the invention, a full-wave electromagnetic simulation is performed on the high-speed differential cable model under the same simulation conditions. The purpose is to ensure that the difference in transmission performance between different structures comes from the structure itself, rather than from the deviation caused by inconsistent simulation settings.

[0026] Full-wave electromagnetic simulation can more realistically depict electromagnetic field distribution, coupling paths, and reflection and standing wave phenomena in the high-frequency range, thereby outputting transmission parameters that can be used for signal integrity assessment and providing a data foundation for subsequent resonant frequency extraction and correspondence establishment.

[0027] To achieve comparability, simulation conditions usually need to be kept consistent. For example, the frequency domain sweep parameter range, the sweep step or the number of sampling points should be kept consistent, the port excitation method should be kept consistent, and the boundary conditions and absorption settings should be kept consistent. At the same time, the meshing strategy and accuracy control parameters should be kept consistent so that the simulation results have the same standard in terms of numerical error.

[0028] Transmission parameters can include curve data related to scattering parameters, or they can be further mapped to more intuitive transmission indicators such as differential insertion loss, thereby directly reflecting bandwidth, attenuation fluctuations, and the fluctuation characteristics caused by resonance.

[0029] For example, the transmission response curves of single-extrusion, double-extrusion, and stranded wire structures can be calculated separately within the same frequency range. By comparison, it can be found that a certain structure exhibits obvious loss fluctuations or peak-valley changes in the target frequency band, which can preliminarily determine that the structure is more likely to induce common-mode or differential-mode related resonance phenomena in the corresponding frequency band.

[0030] As one possible implementation, a parameterized batch processing mechanism can be introduced during the simulation process. Under the premise of keeping the simulation conditions fixed, it can automatically traverse different combinations of twist pitch, shield length or dielectric layer thickness to form a denser transmission parameter database, which facilitates the rapid establishment of the mapping relationship between structural parameters and resonant frequency and improves selection efficiency.

[0031] 103. Determine the resonant frequency of each high-speed differential cable model in the target frequency band based on transmission parameters.

[0032] In this embodiment of the invention, the key to determining the resonant frequency point within the target frequency band based on transmission parameters lies in identifying the abnormal fluctuation positions caused by reflection, standing waves, or periodic structural coupling from the transmission response output by the simulation, and using the frequencies corresponding to these positions as anchor points for subsequent analytical analysis and structural selection.

[0033] Transmission parameters are usually presented as curves that change with frequency. For example, the curve of differential insertion loss parameters changing with frequency should ideally be relatively smooth and show a decreasing trend of gradually increasing with increasing frequency. However, when electromagnetic resonance occurs, the curve will show obvious peak points, valley points or violent fluctuations near a specific frequency, which manifests as a sudden increase or decrease in local loss or periodic fluctuations.

[0034] The target frequency band can be predetermined by application requirements, such as the operating frequency range of a certain transmission protocol or a bandwidth range of design interest. Analyzing the curve within this frequency band can avoid misjudging resonances in irrelevant frequency bands as design risks.

[0035] The resonant frequency can be determined by finding the extreme point of the curve in the target frequency band, or by calculating the change in the slope of the curve or the amplitude of local fluctuations, thereby improving the stability of identifying weak resonance or multiple resonance cases.

[0036] For example, if a stranded wire structure exhibits multiple distinct peak-valley alternations within the target frequency band, while the curve of the secondary extrusion structure is smoother within the same frequency band, it can be determined that the stranded wire structure is more prone to structure-related resonance in that frequency band, and the corresponding peak-valley frequencies can be recorded as the resonant frequencies to be analyzed.

[0037] As a possible implementation, a threshold criterion can also be introduced, such as using a deviation threshold where the peak and valley amplitudes exceed a preset change or the local fluctuations exceed the average attenuation trend as a screening condition, so as to automatically output a set of resonant frequency points during batch parameter scanning and provide standardized data input for subsequent establishment of corresponding relationships.

[0038] 104. Based on the structural parameters of the high-speed differential cable model, perform analytical analysis on the resonant frequency to establish the correspondence between the structural parameters and the resonant frequency.

[0039] In this embodiment of the invention, the resonant frequency is analyzed by combining the structural parameters of the high-speed differential cable model. The purpose is to transform the "resonant position observed" from the transmission curve in the previous stage into "a rule that can be explained and used for design back-reasoning", thereby establishing the correspondence between structural parameters and resonant frequency, and avoiding adjusting the structure based solely on experience and trial and error.

[0040] In analytical analysis, structural parameters can include dielectric-related parameters, geometric dimensional parameters, and periodic structural parameters. Typical examples include the dielectric electrical characteristics corresponding to the effective dielectric constant, the equivalent propagation path length of the common-mode current corresponding to the shielding layer length, the differential-mode propagation electrical length corresponding to the actual length of the straightened strand, and the periodic structural characteristic scale corresponding to the stranding pitch. By substituting these parameters into the approximate analytical relationships of common-mode resonance, differential-mode resonance, and periodic structural resonance, a set of theoretical resonant frequencies can be obtained. These frequencies are then matched with the resonant frequencies extracted in the previous stage to determine which mechanism dominates a particular resonant frequency, thus forming a reusable mapping relationship.

[0041] For example, as the shielding layer length increases, the resonant frequency calculated according to the common-mode resonance analytical relationship will shift to lower frequencies. If the resonant frequency extracted by simulation also shows the same low-frequency shift trend, then this resonant point can be correlated with the common-mode path length. As another example, when changes in the stranding pitch cause new fluctuation modes to appear near certain frequencies, and these patterns are close to the calculated results of periodic structure resonance, these fluctuations can be attributed to the reflection and coupling effects caused by the periodic structure. Through this correspondence process of "theoretical frequency—simulation frequency," the influence of structural parameter changes on the resonant position can be solidified, ultimately forming a correspondence for subsequent parameter back-calculation.

[0042] As a possible implementation, analytical analysis can also be combined with visualization results of electric field or current distribution to help identify the mechanism. For example, a significant standing wave enhancement is observed near the common-mode dominant resonant frequency, while a more concentrated field distribution and phase characteristics that are more consistent with differential mode propagation are observed near the differential-mode dominant resonant frequency, thereby further improving the credibility and interpretability of the established correspondence.

[0043] 105. Based on the correspondence, determine at least one target structural parameter, and construct a target high-speed differential cable model based on at least one target structural parameter.

[0044] In this embodiment of the invention, the target structural parameters are determined according to the correspondence and the target high-speed differential cable model is constructed accordingly. The core is to use the mapping of "structural parameters - resonant frequency" obtained in the previous stage for reverse design, so that the resonance risk in the target frequency band can be avoided in advance in the modeling stage, rather than being passively exposed in the prototype stage.

[0045] Once the correspondence is established, the available range or feasible combination of structural parameters can be given for the target frequency band. For example, when the target frequency band is sensitive to resonance, the common-mode equivalent electrical length can be changed by adjusting the shielding layer length, the effective dielectric constant can be changed by adjusting the dielectric parameters, and the propagation speed can be affected by adjusting the stranding pitch or the number of strands. The periodic structural characteristic scale and the actual propagation length can be changed by adjusting the stranding pitch or the number of strands, thereby pushing the main resonant point away from the target frequency band or reducing the resonance intensity.

[0046] The target structural parameters can be a single parameter or a combination of multiple parameters. In practical applications, they usually include at least the key parameters that have a more direct impact on resonance, such as strand pitch, number of strands, shield length, dielectric layer thickness, or differential pair spacing.

[0047] For example, if the correlation shows that a certain stranding pitch will cause the periodic structure resonance to fall into the target frequency band, a smaller or larger stranding pitch can be selected to shift the resonant frequency outside the target frequency band. If the correlation shows that a change in the shielding layer length will cause the common-mode resonant point to shift downward and enter the target frequency band, this risk can be avoided by shortening the shielding layer length or adjusting the return path structure. When constructing a model based on the determined target structural parameters, the target geometry that meets the parameter constraints can be directly generated in the full-wave electromagnetic simulation software and used as a benchmark model for subsequent verification or further optimization.

[0048] As one possible implementation, to improve design reliability, multiple candidate parameter combinations can be generated based on the correspondence and multiple models to be verified can be constructed respectively. Then, comparative verification can be carried out under the same simulation conditions. The parameter combination with the weakest resonance in the target frequency band or the resonance point farthest from the target frequency band can be selected as the final target structural parameters, thereby achieving a more robust resonance avoidance effect without significantly sacrificing insertion loss and impedance matching.

[0049] It should be noted that the high-speed differential cable mentioned in the embodiments of this invention is a transmission link used to carry high-speed differential signals. Its structure typically includes differential conductors, insulating dielectric layers, and external shielding layers, enabling stable data transmission over a high frequency range. In specific application scenarios, the high-speed differential cable can be a high-definition multimedia interface cable, i.e., an HDMI cable. HDMI cables typically contain differential pairs for transmitting high-speed video and audio data. Their transmission performance is affected by factors such as conductor size, dielectric material parameters, shielding structure, and twist pitch. Therefore, by using the method of this invention to perform full-wave electromagnetic simulation and resonant frequency analysis, the correspondence between structural parameters and resonant frequencies can be established, and the target structural parameters can be determined accordingly, thereby guiding the structural design and performance optimization of HDMI cables.

[0050] In this embodiment of the invention, various high-speed differential cable models with different structures are obtained; full-wave electromagnetic simulation is performed on the high-speed differential cable models under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model; the resonant frequency points of each high-speed differential cable model in the target frequency band are determined based on the transmission parameters; the resonant frequency points are analyzed analytically in combination with the structural parameters of the high-speed differential cable models to establish the correspondence between the structural parameters and the resonant frequency; at least one target structural parameter is determined according to the correspondence, and a target high-speed differential cable model is constructed based on the at least one target structural parameter. By performing full-wave electromagnetic simulation on various high-speed differential cable models with different structures under the same simulation conditions, the transmission parameters are extracted and the resonant frequency points in the target frequency band are determined. Furthermore, the resonance mechanism is analytically modeled in combination with the cable structural parameters, and the correspondence between the structural parameters and the resonant frequency is established. This allows for the rapid reverse deduction and determination of key structural parameters and the construction of a target high-speed differential cable model based on the requirements of the target frequency band, avoiding the problems of long design cycles and uncontrollable resonance caused by traditional reliance on experience and repeated trial and error. This significantly improves the design efficiency, resonance avoidance capability, and signal transmission reliability of high-speed differential cables.

[0051] It is understood that in the specific implementation of this application, data related to transmission parameters, structural parameters, etc. are involved. When the embodiments in this application are applied to specific products or technologies, user permission or consent is required. Furthermore, the collection, use and processing of related data, as well as the construction, training and use of full-wave electromagnetic simulation software and high-speed differential cable models, must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0052] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. In the step of obtaining high-speed differential cable models with multiple different structures, high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure can also be established in the preset full-wave electromagnetic simulation software. When establishing high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure, at least the model length, conductor radius, dielectric layer outer diameter, and covering form should be consistent, and the conductor material properties and dielectric material properties should be consistent.

[0053] In this embodiment of the invention, three typical cable types—single-extrusion structure, double-extrusion structure, and stranded structure—are selected for the high-speed differential cable models with different structures. These are used to compare the influence of dielectric covering methods, shielding structure morphology, and differential pair arrangement on resonant characteristics at a unified scale. Modeling is performed in full-wave electromagnetic simulation software, such as HFSS, where geometric models of the three cable types are established and electromagnetic solution settings matching high-frequency transmission analysis are configured. To ensure that the comparison conclusions are directly attributable to structural differences rather than disturbances from irrelevant factors, the modeling stage requires deliberate maintenance of consistency in key geometric parameters and material properties. For example, the model length, conductor radius, dielectric layer outer diameter, and covering form are kept consistent within the same comparison dimension. Simultaneously, the conductor material properties and dielectric material properties are also kept consistent, thereby enabling the subsequent differences in transmission parameters to more accurately reflect the effect of structural design on signal transmission and resonant behavior.

[0054] The geometry of a high-speed differential cable model with a single-extrusion structure is as follows: Figure 2 As shown, the core wire and ground wire can be clearly distinguished in the cross-section. Together, they constitute the main conductive path of the high-speed differential pair. A dielectric layer is wrapped around the conductor to provide insulation support and determine the effective dielectric environment when electromagnetic waves propagate within the structure. An aluminum foil Mylar layer is also set outside the dielectric layer. The aluminum foil Mylar can not only shield external electromagnetic interference, but also form the return path boundary related to the common-mode current. Therefore, the existence of this shielding layer will be reflected as an important electrical length parameter in the subsequent resonance analysis. Figure 2 The labeled elements correspond to the ground wire, core wire, a layer of dielectric, and aluminum foil Mylar, respectively. In this embodiment, the radii of the ground wire and the core wire are consistently set to 0.145 mm for the ground wire and 0.29 mm for the core wire. The outer diameter of the layer of dielectric corresponds to a radius of 0.725 mm. This set of dimensions is used to form a unified benchmark for the single extrusion structure in the simulation.

[0055] The geometric shape of the high-speed differential cable model with a secondary extrusion structure is as follows: Figure 3 As shown, compared to a single-extrusion structure, this linear design adds two more dielectric layers in addition to the original single dielectric layer, expanding the dielectric environment surrounding the differential pair from a single-layer dielectric to a multi-layer dielectric structure. The addition of the two dielectric layers changes the effective dielectric constant, thereby altering the electromagnetic wave propagation speed and the equivalent electrical length, causing the resonant point position to shift relative to the single-extrusion structure. Figure 3 The same markings are used for ground wire, core wire, first layer dielectric, second layer dielectric, and aluminum foil Mylar. The radius corresponding to the outer diameter of the second layer dielectric is set to 1mm to reflect the multi-layer dielectric coating characteristics of the secondary extrusion structure. At the same time, key parameters such as conductor radius and first layer dielectric radius are kept consistent with the primary extrusion structure for interpretable comparison.

[0056] The geometric shape of a high-speed differential cable model with a stranded wire structure is as follows: Figure 4 As shown, unlike the parallel differential pair structure, the stranded wire structure exhibits a periodic twisting pattern along its length. The relative positions of the differential pairs in space change periodically with the length, thus introducing periodic structural features. Figure 4 The waveform represents the twisting trajectory of the differential pair, and the twist pitch is marked with a double-headed arrow. The twist pitch represents the axial distance between two adjacent repeating points of the periodic structure and is a key structural parameter in periodic resonance analysis. While ensuring consistency with reference parameters such as conductor radius and dielectric outer diameter, the twisted wire structure introduces the periodic scale of the twist pitch, causing the actual length of the transmission path, coupling strength, and local electromagnetic field distribution to change regularly with position. This makes it easier to trigger reflection or standing wave characteristics caused by the periodic structure in certain frequency bands, providing a quantifiable structural basis for establishing the correspondence between the twist pitch and the resonant frequency.

[0057] In one embodiment, the geometric dimensions of the three wire types are given according to a unified table to ensure that the differences between the wire types only lie in key points such as the number of extruded layers and the stranding pattern. Specifically, the ground wire radius is uniformly 0.145 mm, the core wire radius is uniformly 0.29 mm, and the radius of the first dielectric layer is uniformly 0.725 mm; the secondary extrusion structure additionally includes two dielectric layers with a radius of 1 mm, while the primary extrusion structure and the stranded structure do not have two dielectric layers. Regarding material parameters, the core wire material is pure copper, the ground wire material is pure copper, the primary extrusion dielectric material is foamed polyethylene, the secondary extrusion dielectric material is high-density polyethylene, and the shielding material is aluminum foil. Through the unified setting of the above geometric parameters and material properties, directly comparable simulation results can be obtained under the same solution conditions, thereby supporting the comparison of transmission parameters of different structures, the extraction of resonant frequencies, and the establishment of the correspondence between structural parameters and resonant frequencies.

[0058] As one possible implementation, the modeling stage can also adopt a parametric approach to manage the model structure, writing variables such as conductor radius, dielectric radius, and strand pitch into the parameter list of the simulation software. This allows for rapid switching and batch generation of three types of structures—first-stretch, second-stretch, and stranded wire—within the same project file. This reduces the cost of repetitive modeling when scanning different strand pitches or dielectric thicknesses in subsequent scans, and improves the efficiency of cable structure screening and design optimization.

[0059] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. In the step of performing full-wave electromagnetic simulation on the high-speed differential cable models under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model, the same frequency domain sweep range and sampling points can also be set for the high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure; and the electromagnetic field solution can be run after setting the port excitation mode and boundary conditions respectively to obtain the transmission parameters.

[0060] In this embodiment of the invention, in order to obtain the transmission response of high-speed differential cable models with different structures at high frequencies and achieve comparable analysis, it is necessary to conduct full-wave electromagnetic solutions under consistent simulation conditions. The consistency of simulation conditions is mainly reflected in the unified setting of frequency domain sweep range and sampling points. That is, the three types of models use the same sweep bandwidth, the same frequency resolution or the same number of sampling points, so as to ensure that the horizontal axis coverage range of the curve is consistent with the data density, and avoid the omission or offset of resonant points due to different sweep ranges or sparse sampling.

[0061] Simultaneously, to ensure that the model's port excitation and energy boundary have comparable physical meaning, it is necessary to configure the port excitation method and boundary conditions separately and run electromagnetic field solutions. The port excitation method defines the injection and extraction of the differential signal, while the boundary conditions constrain the propagation and absorption behavior of the electromagnetic field within the solution region. Both together determine the accuracy of the scattering response calculation. After solving, the transmission parameters can be obtained. Among these parameters, the differential insertion loss parameter directly reflects the energy attenuation along the transmission direction and its variation with frequency, serving as a key basis for identifying resonance fluctuations and evaluating transmission stability.

[0062] like Figure 5As shown, the three curves represent the differential insertion loss responses of the twisted-wire structure, the single-ejection structure, and the double-ejection structure within the same frequency range. The horizontal axis represents frequency, and the vertical axis represents the magnitude of the differential insertion loss (i.e., SDD12, the insertion loss from differential port 1 to differential port 2 (a differential insertion loss parameter used to indicate how much the differential signal attenuates during transmission from input to output). The overall trend of the curves reflects the degree of attenuation at high frequencies, while local peaks and valleys reflect resonance characteristics caused by reflection, standing waves, or periodic coupling. The differential insertion loss curve of the twisted-wire structure in the figure exhibits significant periodic fluctuations with large peak-valley variations, indicating that multiple resonance points are more likely to occur within the target frequency band, leading to unstable transmission performance, manifested as sudden increases or decreases in loss. This type of high loss and multiple resonance characteristics increases the risk of waveform distortion in high-speed differential signals and adversely affects link stability. Compared to the stranded wire structure, the curve of the single-extrusion structure exhibits reduced fluctuations and lower resonance amplitude in certain frequency ranges, indicating that single-layer dielectric cladding and structural simplification can weaken the resonance intensity to some extent. However, significant fluctuations are still observed at higher frequencies, suggesting that the structure itself may still possess resonance modes related to electrical length or coupling. The curve of the double-extrusion structure is smoother overall within the same frequency band, with lower insertion loss and significantly reduced fluctuation amplitude. This indicates that multi-layer dielectric cladding effectively improves transmission stability by enhancing the propagation environment and adjusting coupling conditions, resulting in better bandwidth and attenuation characteristics for high-performance transmission requirements.

[0063] To understand more intuitively Figure 5 The differences can be seen in the peak or valley points of the curve as potential candidate locations for resonant frequencies: when the curve of a certain structure has continuous deep valleys or peaks near certain frequencies, it often corresponds to stronger reflection and standing wave accumulation effects, while when the curve fluctuates less and changes more gently, it usually means that the impedance matching is more stable or the resonant mode is suppressed.

[0064] As one possible implementation, auxiliary curves related to common mode or differential mode can be superimposed under the same frequency sweep conditions, or a judgment threshold can be set for peak and valley fluctuations, thereby automatically marking the resonant point position in the batch simulation output and providing directly referable data basis for establishing the correspondence between structural parameters and resonant frequencies.

[0065] Optionally, the transmission parameters include differential insertion loss parameters. In the step of determining the resonant frequency of each high-speed differential cable model in the target frequency band based on the transmission parameters, the curve of the differential insertion loss parameter of each high-speed differential cable model changing with frequency can also be determined; the peak point and / or valley point are determined in the target frequency band of the curve; and the frequency corresponding to the peak point and / or valley point is determined as the resonant frequency.

[0066] In this embodiment of the invention, the transmission parameter selected is the differential insertion loss parameter, which is used to characterize the energy transmission attenuation of high-speed differential cables in the frequency domain. After the full-wave electromagnetic simulation is completed, a curve showing the differential insertion loss parameter changing with frequency can be obtained. This curve, with frequency as the horizontal axis and differential insertion loss amplitude as the vertical axis, can intuitively reflect the degree of transmission attenuation and its fluctuation characteristics of high-speed differential cables with different structures at different frequency points. To make the determination of the resonance point more in line with the actual application requirements, the target frequency band can be predetermined, and the curve can be analyzed only within the target frequency band, avoiding misjudging local fluctuations in irrelevant frequency bands as resonance risks of concern in the design.

[0067] Within the target frequency band, when the differential insertion loss curve exhibits significant abrupt fluctuations, it usually indicates that the transmission link is experiencing strong reflections or standing wave effects near that frequency, manifesting as local peaks and valleys in the curve's shape. Peaks can be understood as relatively high points on the curve within a local range, and valleys as relatively low points; both can serve as candidate markers for resonance characteristics. By identifying peaks and valleys, the frequencies corresponding to these points can be recorded as resonant frequencies, forming a quantifiable set of frequencies and providing a unified data entry point for subsequent analytical analysis and structural parameter mapping.

[0068] For example, when a stranded wire structure exhibits multiple regular peak-valley alternations within a target frequency band, the frequencies of each significant peak and valley can be marked as multiple resonant frequencies, thus reflecting the potential multimode resonance phenomenon of the stranded wire structure. When the curve of a secondary extruded structure is smoother and the peak-valley fluctuations are less pronounced within the same target frequency band, fewer resonant frequencies can be identified, or the fluctuation amplitude is weaker, indicating higher transmission stability of the corresponding structure within that frequency band. For example, in Figure 5 In the differential insertion loss versus frequency curve shown, the frequencies corresponding to the peak and / or valley points within the target frequency band are recorded as the resonant frequencies. As one possible implementation, fluctuation amplitude criteria can also be set, such as only recognizing a valid resonant frequency point when the peak-to-valley difference exceeds a preset threshold, so that the key resonant point position can still be stably output when there are slight numerical fluctuations or noise in the simulation data, and the efficiency of automated judgment in batch parameter scanning scenarios can be improved.

[0069] Optionally, in the step of combining the structural parameters of the high-speed differential cable model to perform analytical analysis on the resonant frequency to establish the correspondence between structural parameters and resonant frequencies, the effective dielectric constant of the high-speed differential cable model can also be determined, and the propagation speed can be determined based on the effective dielectric constant; the common-mode resonant frequency can be calculated based on the shielding layer length and propagation speed; the differential-mode resonant frequency can be calculated based on the actual length of the straightened stranded wire and the propagation speed; the periodic structural resonant frequency can be calculated based on the stranding pitch and propagation speed; and the common-mode resonant frequency, differential-mode resonant frequency, and / or periodic structural resonant frequency can be mapped to the resonant frequency to establish the correspondence between structural parameters and resonant frequencies.

[0070] In this embodiment of the invention, in order to analyze and attribute the resonant frequencies extracted within the target frequency band and establish the correspondence between structural parameters and resonant frequencies, after completing the acquisition of transmission parameters and extraction of resonant frequencies, an analytical calculation process for common-mode resonance, differential-mode resonance, and periodic structural resonance can be introduced to quantitatively analyze the resonance mechanism. During the analytical process, the effective dielectric constant is first determined, and the propagation speed of electromagnetic waves in high-speed differential cables is obtained from the effective dielectric constant. Then, the theoretical resonant frequencies of different resonant modes are calculated based on structural parameters such as the shielding layer length, the actual length of the straightened stranded wire, and the stranding pitch. Finally, the theoretical resonant frequencies are correlated with the resonant frequencies extracted from the differential insertion loss curve, thereby obtaining a correspondence that can be used for parameter back-calculation and structural design.

[0071] In a twisted-pair cable structure, when an aluminum foil shielding layer is applied externally, the aluminum foil not only shields against external electromagnetic interference but also forms a common-mode current propagation path with a defined electrical length. After the common-mode current is reflected and forms a standing wave in this path, it excites a common-mode resonant mode at a specific frequency. The common-mode resonant frequency can be expressed as:

[0072] in, This represents the common-mode resonant frequency, and the unit can be... or ; Indicates the resonance order, used to characterize the order in which standing waves are formed. This corresponds to the fundamental mode resonance. This corresponds to a second-order resonance. or This is used to express the engineering equivalent of low-order fractional modes; It represents the common-mode propagation velocity, reflecting the phase velocity of the common-mode current as it propagates along the shielding structure; This represents the equivalent length of the shielding layer or the common-mode current propagation path length, in units of... Its value can be determined by the geometric length of the shielding layer of the high-speed differential cable. From the common-mode resonance formula, it can be obtained that when... When increasing, Shift towards lower frequencies; when When decreasing, Since the shielding layer moves towards higher frequencies, its length is a key structural parameter affecting the common-mode resonance location.

[0073] To obtain the propagation speed and support the calculation of the resonant frequency, the effective dielectric constant can be determined first. The effective dielectric constant characterizes the equivalent electromagnetic propagation environment formed by the interaction between the conductor and the dielectric. Its magnitude is related to the dielectric constant of the materials, the conductor spacing, and the dielectric thickness, and directly affects the propagation speed. An approximate expression for the effective dielectric constant can be given as:

[0074] in, Indicates the effective dielectric constant; Indicates the relative permittivity of the dielectric material; This represents the center-to-center distance between the two conductors in a differential pair, in units of... ; Indicates the diameter of the conductor, in units of . ; This represents the equivalent thickness or dielectric layer thickness from the outer edge of the conductor to the dielectric boundary, expressed in units of... ; This represents the natural logarithm operation. This approximation allows mapping cable geometry parameters to dielectric material parameters as effective dielectric constants, which can then be used for subsequent propagation speed calculations.

[0075] The propagation speed and the effective dielectric constant satisfy the following relationship:

[0076] in, The speed of electromagnetic waves propagation in the medium of high-speed differential cables is expressed in units of 1000 m / s. ; The speed of light in a vacuum is usually represented by . ; This represents the effective dielectric constant. As the effective dielectric constant increases, the propagation speed decreases; as the effective dielectric constant decreases, the propagation speed increases, thus causing the resonant frequency to shift with changes in the dielectric parameters.

[0077] The electromagnetic field excited by differential-mode current during transmission is mainly concentrated in the narrow gap between the two conductors. The differential-mode propagation characteristics are primarily affected by the conductor spacing, dielectric distribution, and structural arrangement. For stranded wire structures, the periodic twisting not only increases the physical length of the transmission path but also introduces geometric non-uniformity, thus affecting the phase and resonance conditions of the differential-mode signal. The differential-mode resonant frequency can be expressed as:

[0078] in, Indicates the differential mode resonant frequency; Indicates the propagation speed of the differential mode; This represents the actual length of the stranded wire after straightening, or the equivalent length of the differential mode current propagation path, in units of... ; This indicates the resonance order. From this equation, we can see that... Increasing the time difference mode resonant frequency reduces To reduce the rise of the time-difference mode resonant frequency, the actual length of the stranded wire is an important structural parameter affecting the differential mode resonant frequency.

[0079] When electromagnetic waves encounter a periodic structure, if the propagation frequency meets specific reflection conditions, strong reflection or even standing wave resonance will occur. The twist pitch of the twisted pair causes the structure to exhibit periodic changes along the propagation direction. This periodic structure will produce Bragg reflections at certain frequencies, thus forming resonant points of the periodic structure. The resonant frequency corresponding to Bragg reflection can be expressed as:

[0080] in, Indicates the resonant frequency of a periodic structure; Indicates the speed of propagation; Indicates the twist pitch, in units of The term is used to characterize the spatial periodicity of the stranded wire structure along its axial direction. This formula shows that decreasing the strand pitch increases the resonant frequency of the periodic structure, while increasing the strand pitch decreases it. Therefore, the strand pitch can be used as an important design variable to control the resonant position of the periodic structure.

[0081] In one embodiment, the analytical relationship can be quantitatively illustrated using the following example. The effective dielectric constant calculated based on the analytical relationship is: The propagation speed is:

[0082] in, This indicates the equivalent dielectric environment of the high-speed differential cable under the target structure and material parameter combination. This indicates the propagation speed in the equivalent dielectric environment.

[0083] The actual length of a straightened twisted-pair cable can be calculated according to the following relationship:

[0084] in, This indicates the actual length of the stranded wire after it has been straightened. Indicates the twist pitch; This represents the equivalent diameter parameter formed by twisting; This indicates the number of strand segments or stranding cycles. This formula reflects the effect of increasing strand geometric path length relative to straight line length; the path length increases with the number of strand segments.

[0085] Furthermore, the common-mode resonance position, differential-mode resonance position, and Bragg reflection resonance position can be determined according to the following expressions:

[0086] in, This represents the first-order common-mode resonant frequency. This indicates the common-mode resonance location of the parallel-line structure under corresponding boundary conditions. This indicates the common-mode resonance location of the stranded wire structure under corresponding boundary conditions; this expression reflects that the common-mode resonant frequency is mainly determined by the equivalent length of the shielding layer, and in this example, it is taken as... Perform the calculation.

[0087]

[0088] in, This represents the first-order differential-mode resonant frequency. The formula demonstrates that the differential-mode resonant frequency is primarily determined by the actual length of the stranded wire after straightening. In this example, we take... Perform the calculation.

[0089]

[0090] This relationship is used to express that the common-mode resonant position of the parallel structure under the given conditions is consistent with the first-order common-mode resonant frequency.

[0091]

[0092] in, The pitch represents the twist pitch, and the calculation results show that the resonant point of the periodic structure appears in the higher frequency band. From this result, it can be concluded that the resonant point of the periodic structure is usually considered in conjunction with lower-order waves in engineering analysis to establish an effective correlation with resonance phenomena within the target frequency band.

[0093] In one embodiment, based on the correspondence between low-order resonant modes and structural parameters, the typical resonant point locations of the primary extrusion structure and the stranded structure within the target frequency band can be further obtained. Specifically, the resonant point location of the primary extrusion structure includes: a half-order common-mode resonance of approximately... The second-order differential mode resonance is approximately The resonant points of the stranded wire structure include: the quarter-order common-mode resonance is approximately... The first-order differential mode resonance is approximately The fourth-fifth order common-mode resonance is approximately The second-order common-mode resonance is approximately .

[0094] By correlating the common-mode resonant frequency, differential-mode resonant frequency, and periodic structural resonant frequency obtained from the above theoretical calculations with the resonant frequency points extracted from the differential insertion loss curve, a correspondence between structural parameters and resonant frequencies can be established. This provides analytical basis for subsequently deducing key structural parameters such as shield length, actual strand length, and stranding pitch based on the target frequency band.

[0095] As a possible implementation, after establishing the correspondence between the theoretical frequency and the simulated resonant frequency, the results of the electric field and current distribution from the full-wave electromagnetic simulation can be used for further verification. For example, near the common-mode resonant frequency, an enhanced common-mode current standing wave can be observed along the shielding path; near the differential-mode resonant frequency, an enhanced electric field concentration can be observed in the differential conductor gap region; and near the resonant frequency of the periodic structure, an enhanced periodic reflection can be observed along the propagation direction. This further enhances the credibility of the resonance mechanism attribution and the applicability of the correspondence.

[0096] Optionally, in the step of mapping the common-mode resonant frequency, differential-mode resonant frequency, and / or periodic structural resonant frequency to the resonant frequency point to establish the correspondence between structural parameters and resonant frequencies, the common-mode resonant frequency, differential-mode resonant frequency, and / or periodic structural resonant frequency can also be mapped to the resonant frequency point to establish an initial correspondence between structural parameters and resonant frequencies. While keeping the conductor dimensions unchanged, a secondary-extruded dielectric layer is wrapped around the high-speed differential cable model of the primary extrusion structure to construct a high-speed differential cable model of the secondary extrusion structure. Under the same simulation conditions, a full-wave electromagnetic simulation is performed on the high-speed differential cable model of the secondary extrusion structure, and the resonant frequency point of the high-speed differential cable model of the secondary extrusion structure in the target frequency band is determined. The resonant frequency point of the high-speed differential cable model of the secondary extrusion structure is compared with the resonant frequency determined by the initial correspondence. Based on the comparison results, the initial correspondence is updated to obtain the correspondence between structural parameters and resonant frequencies.

[0097] In this embodiment of the invention, in order to make the initial correspondence constructed from the common-mode resonant frequency, the differential-mode resonant frequency and the periodic structural resonant frequency more applicable and accurate, a simulation verification process of the secondary extrusion structure can be further introduced to correct and update the initial correspondence, thereby obtaining the correspondence between the structural parameters and the resonant frequency.

[0098] Specifically, after deriving the theoretical frequency points of the high-speed differential cable model with a primary extrusion structure and establishing an initial correspondence with the simulated resonant frequency points, a secondary extrusion dielectric layer is wrapped around the primary extrusion structure while keeping the conductor dimensions unchanged, resulting in a high-speed differential cable model with a secondary extrusion structure. Full-wave electromagnetic simulation is then performed under the same simulation conditions as the primary extrusion structure to obtain the differential insertion loss curve of the secondary extrusion structure within the target frequency band. The peak and valley points of this curve are further extracted as the resonant frequencies corresponding to the secondary extrusion structure. The resonant frequencies of the secondary extrusion structure are then compared with the resonant frequencies predicted by the initial correspondence. Based on the comparison results, the initial correspondence is updated so that the final correspondence can simultaneously cover the dielectric distribution differences between the primary and secondary extrusion structures, thereby more accurately reflecting the influence of the high-speed differential cable structure parameters on the resonant behavior.

[0099] In one embodiment, the secondary extrusion structure adds an outer dielectric layer compared to the primary extrusion structure. The introduction of the outer dielectric layer alters the electromagnetic wave propagation environment, causing a change in the effective dielectric constant, which in turn affects the propagation speed and the distribution of resonant frequencies. The effective dielectric constant of the primary extrusion structure can be estimated using the following approximate expression:

[0100] in, This represents the effective dielectric constant corresponding to a single-ejection structure. This represents the relative permittivity of the extruded dielectric material. Indicates the center-to-center distance between two conductors. Indicates the diameter of the conductor. Indicates the thickness of the medium.

[0101] After further coating the primary extruded medium with a secondary extruded medium layer, the effective dielectric constant can be estimated using the following approximate expression:

[0102] in, This represents the relative permittivity of the extruded dielectric material. This represents the relative permittivity of the secondary extrusion medium material. , , The meaning is the same as described above.

[0103] The propagation speed of electromagnetic waves and the effective dielectric constant satisfy the following relationship:

[0104] in, This indicates the propagation speed of electromagnetic waves in a high-speed differential cable structure. It represents the speed of light in a vacuum.

[0105] When the propagation speed changes, the resonant frequency corresponding to the resonance condition also changes. For an equivalent propagation length of... The resonant mode of [the element] can be obtained using the following relationship: First resonant frequency:

[0106] in, Indicates the first First resonant frequency, Indicates the resonance order. This indicates the equivalent propagation length of the corresponding mode. Therefore, it can be seen that when the secondary extrusion structure introduces an outer medium, leading to... When increased, the propagation speed This reduces the frequency, causing the overall resonant frequency to shift towards lower frequencies. This is consistent with the phenomenon that the resonant point position shifts in the simulation curve of the secondary extrusion structure compared to the primary extrusion structure.

[0107] Furthermore, the introduction of an outer dielectric layer alters the characteristic impedance of the structure, thereby affecting the reflection conditions and changing the peak and valley amplitudes of the differential insertion loss curve. The characteristic impedance can be calculated using the following expression:

[0108] in, Indicates characteristic impedance. Represents the inverse hyperbolic cosine function. , , The meaning is consistent with the aforementioned. From this relationship, it can be seen that... Enlargement will lead to Decrease.

[0109] When the signal propagates to the terminal load At a certain point, if the terminating impedance does not match the characteristic impedance, reflection will occur, and its reflection coefficient satisfies:

[0110] in, Represents the reflection coefficient. Indicates the terminal load impedance. This represents the characteristic impedance. When... When it represents a perfect match with no reflection, when Time indicates the presence of reflection, and the degree of reflection is related to... Related. Increased reflection leads to a more pronounced standing wave, which manifests as an increase in the amplitude of peaks and valleys in the differential insertion loss curve; decreased reflection leads to a weakened standing wave effect, which manifests as a decrease in the amplitude of peaks and valleys or a less pronounced resonance characteristic.

[0111] To further illustrate the influence of dielectric layer thickness and conductor spacing on the resonant point behavior, a parametric scan of dielectric thickness and conductor spacing can be performed while keeping the conductor size constant, and the differential insertion loss curves obtained by various parameter combinations can be compared and analyzed. Figure 6 The graph shows the differential insertion loss versus frequency for different combinations of dielectric thickness and conductor spacing. The legend "Dielectric Thickness, Conductor Spacing (mm)" identifies the structural parameter combinations corresponding to each curve. Figure 6 It is evident that under certain parameter combinations, the peak-valley fluctuations of the curve are relatively small, indicating weak reflection and resonance excitation intensity of the corresponding structure. However, under most parameter combinations, peak-valley fluctuations can still be observed near a fixed frequency, suggesting that even by altering local geometric parameters to weaken certain resonant modes, resonant behavior can still be excited due to factors such as the equivalent propagation path and the electrical length of the shielding structure. Based on the simulation results of the secondary extrusion structure and... Figure 6 The parametric scanning results can update the initial correspondence, making the correspondence more closely match the dielectric distribution characteristics of the secondary extrusion structure, thereby obtaining the correspondence between structural parameters and resonant frequencies.

[0112] Optionally, in the steps of determining at least one target structural parameter according to the correspondence and constructing a target high-speed differential cable model based on the at least one target structural parameter, at least one candidate structural parameter combination can also be determined based on the correspondence. The candidate structural parameter combination includes at least the stranding pitch and / or the number of strands. A target high-speed differential cable model to be verified is constructed based on each candidate structural parameter combination, and a full-wave electromagnetic simulation is performed on each target high-speed differential cable model to be verified under the same simulation conditions to determine the resonant frequency of each target high-speed differential cable model to be verified in the target frequency band. The resonant frequency of each target high-speed differential cable model to be verified is compared and verified with the resonant frequency determined by the correspondence. When the comparison result meets a preset deviation threshold, the corresponding candidate structural parameter combination is determined as the target structural parameter, and a target high-speed differential cable model is constructed based on the target structural parameter. The candidate structural parameter combination includes: reducing the number of strands to synchronously reduce the shielding length and the actual length of the straightened strand, and / or reducing the stranding pitch to reduce the shielding length and the actual length of the straightened strand.

[0113] In this embodiment of the invention, to truly implement the correspondence between structural parameters and resonant frequencies in cable structure design, at least one candidate combination of structural parameters can be determined based on the correspondence. Then, high-speed differential cable models matching these candidate combinations are constructed. Full-wave electromagnetic simulation is used to obtain the resonant frequencies of each high-speed differential cable model within the target frequency band. The simulated resonant frequencies are then compared with the resonant frequencies predicted by the correspondence. When the comparison error meets a preset deviation threshold, the corresponding candidate combination of structural parameters is determined as the target structural parameters. A target high-speed differential cable model is then constructed based on these target structural parameters, thereby achieving parametric design and structural convergence of the high-speed differential cable.

[0114] In one embodiment, the candidate structural parameter combination includes at least one of stranding pitch and number of strands, wherein the stranding pitch characterizes the axial distance between two adjacent stranded repeating structures, and the number of strands characterizes the number of periodic segments of the stranded wire along the entire length of the model. Further, the candidate structural parameter combination may include at least one of the following adjustment strategies: by reducing the number of strands, the shielding layer length and the actual length of the straightened stranded wire are reduced synchronously; or by reducing the stranding pitch, the shielding layer length is reduced, and the actual length of the straightened stranded wire is also reduced, thereby pushing the resonant frequency point outside the target frequency band and reducing loss fluctuations within the target frequency band.

[0115] To verify the impact of the above parameter selection strategy on the resonant frequency, in one embodiment, a high-speed differential cable model with a stranded wire structure was used as the benchmark structure for parameter comparison experiments. The benchmark structure used 10 stranded wires with a stranding pitch of 2.2 mm. By modifying the number of strands and the stranding pitch, two typical candidate structure parameter combinations were constructed. Full-wave electromagnetic simulation was then performed under the same simulation conditions as the benchmark structure to obtain the differential insertion loss curves of each structure in the target frequency band, thereby identifying the resonant frequency and performing comparative analysis.

[0116] The first candidate structural parameter combination involves reducing the number of strands from 10 to 5 while maintaining the stranding pitch at 2.2 mm. Due to the reduction in the number of strands, the shielding layer length... Actual length after straightening the stranded wire The frequency is reduced to approximately half of the original structure. Therefore, based on the analytical relationship between the common-mode resonant frequency and the differential-mode resonant frequency, it can be deduced that the corresponding resonant frequency position will shift to the right and approach approximately twice that of the original structure. Simulation results show that the resonant frequency position of this candidate structure in the target frequency band is almost twice that of the original structure, with the main resonant frequencies appearing around approximately 3 GHz and approximately 9 GHz. This is consistent with the... , The reduction is consistent with the predicted trend that the common-mode and differential-mode resonant frequencies will shift proportionally upward, verifying the effectiveness of the candidate structure parameter combination.

[0117] The second candidate structural parameter combination is to maintain the number of strands at 10, while reducing the strand pitch from 2.2 mm to 1.1 mm. Due to the reduced strand pitch, the length of the shielding layer is... Reduce, on the other hand, to increase the actual length of the stranded wire after straightening. Further shortening, making with , The overall resonant frequency increases, resulting in a shift of the resonant frequency point towards higher frequencies. Simulation results show that the peak and valley points of the differential insertion loss curve for this candidate structure in the target frequency band shift to the right, and the resonant frequency point is shifted towards higher frequencies compared to the reference structure, which is consistent with the analytical derivation that the resonant frequency shifts upward due to the shortening of the structure length.

[0118] Figure 7 The differential insertion loss versus frequency curves are presented for the baseline structure and two candidate structural parameter combinations. The legend "Number of Strands, Twist Pitch" indicates the combination of strand number and strand pitch corresponding to different curves. By comparing the peak and trough distributions of different curves within the target frequency band, it can be visually observed that reducing the number of strands or the strand pitch causes the resonant frequency to shift towards higher frequencies. This provides simulation verification for determining the target structural parameters based on the correspondence. When the deviation between the simulated resonant frequency and the resonant frequency predicted by the correspondence meets a preset deviation threshold, the corresponding candidate structural parameter combination can be determined as the target structural parameter, and a target high-speed differential cable model that meets the target frequency band requirements can be further constructed.

[0119] like Figure 8 As shown, this embodiment of the invention also provides another method for constructing high-speed differential cables, through... Figure 8 It can be seen that another method for constructing high-speed differential cables takes three types of high-speed differential cable models—"single-extrusion structure, double-extrusion structure, and stranded structure"—as the starting point for analysis. By unifying modeling and simulation conditions, the transmission performance results of the three types of cable types are obtained. Based on this, the cause of resonance point occurrence is analyzed, thus providing a basis for subsequent structural parameter optimization and target cable construction.

[0120] This method first establishes simulation models of single-extrusion, double-extrusion, and stranded wire structures. Under the premise of ensuring consistency in key conditions such as conductor size, dielectric parameters, and model length, the transmission characteristics of the three wire types are compared through simulation evaluation, yielding performance curves such as differential insertion loss. By identifying the frequency positions corresponding to loss fluctuations in the curves, the resonant frequency points within the target frequency band can be located, leading to conclusions about the differences in frequency domain response among the three wire types.

[0121] After completing the simulation comparison, the method further enters the "resonance cause analysis" stage, and divides the attribution path into two parallel directions: On the one hand, a comparative analysis is conducted on the primary extrusion structure and the secondary extrusion structure, focusing on explaining the reasons for the resonant point position shift and peak amplitude change from the perspectives of changes in effective dielectric constant, propagation velocity, and impedance matching after the introduction of the dielectric layer, thereby revealing the influence law of dielectric structure on resonant behavior; On the other hand, for the stranded structure, starting from the periodic structural effect caused by the stranding pitch, the change in coupling between differential pairs, and geometric factors such as dielectric thickness and conductor spacing, the physical mechanism of resonant point formation is analyzed, clarifying the relationship between structural periodicity and coupling strength on the resonant frequency distribution.

[0122] Through the above process, the "differences in simulation results of different line types" can be further transformed into "interpretable structural factors," enabling the parameter selection of high-speed differential cables to shift from empirical adjustment to a verifiable and derivable construction process. Furthermore, it provides direct analytical basis and optimization direction for subsequent determination of target structural parameters based on correspondence and formation of target high-speed differential cable models.

[0123] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0124] In one embodiment, a high-speed differential cable construction apparatus is provided, which corresponds one-to-one with the high-speed differential cable construction method described in the above embodiments. For example... Figure 9 As shown, the high-speed differential cable construction device includes an acquisition module 901, a simulation module 902, a determination module 903, an analysis module 904, and a construction module 905. Detailed descriptions of each functional module are as follows: Module 901 is used to acquire high-speed differential cable models with various different structures. The simulation module 902 is used to perform full-wave electromagnetic simulation on the high-speed differential cable model under the same simulation conditions to obtain the transmission parameters corresponding to each of the high-speed differential cable models. The determining module 903 is used to determine the resonant frequency of each of the high-speed differential cable models in the target frequency band based on the transmission parameters; Analysis module 904 is used to perform analytical analysis on the resonant frequency point in combination with the structural parameters of the high-speed differential cable model, so as to establish the correspondence between the structural parameters and the resonant frequency; The construction module 905 is used to determine at least one target structural parameter according to the correspondence, and to construct a target high-speed differential cable model based on the at least one target structural parameter.

[0125] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. The acquisition module 901 is further used for: High-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure were established in the preset full-wave electromagnetic simulation software. When establishing the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure, and stranded structure, at least the model length, conductor radius, dielectric layer outer diameter, and sheathing form should be consistent, and the conductor material properties should be consistent with the dielectric material properties.

[0126] Optionally, the high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. The simulation module 902 is further used for: The same frequency domain sweep range and sampling points are set for the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure and stranded structure. After setting the port excitation mode and boundary conditions respectively, the electromagnetic field solution is run to obtain the transmission parameters.

[0127] Optionally, the transmission parameters include differential insertion loss parameters, and the determining module 903 is further configured to: Determine the curves of the differential insertion loss parameters as a function of frequency for each of the aforementioned high-speed differential cable models; Determine the peak points and / or valley points within the target frequency band of the curve; The frequencies corresponding to the peak points and / or valley points are determined as the resonant frequencies.

[0128] Optionally, the analysis module 904 is further configured to: Determine the effective dielectric constant of the high-speed differential cable model, and determine the propagation speed based on the effective dielectric constant; The common-mode resonant frequency is calculated based on the shielding layer length and the propagation speed. The differential mode resonant frequency is calculated based on the actual length of the straightened stranded wire and the propagation speed. The resonant frequency of the periodic structure is calculated based on the twist pitch and the propagation velocity. The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish a correspondence between the structural parameters and the resonant frequencies.

[0129] Optionally, the analysis module 904 is further configured to: The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish an initial correspondence between the structural parameters and the resonant frequencies. While keeping the conductor size unchanged, a secondary extruded dielectric layer is wrapped around the high-speed differential cable model with a primary extrusion structure to construct a high-speed differential cable model with a secondary extrusion structure. Under the same simulation conditions, a full-wave electromagnetic simulation was performed on the high-speed differential cable model of the secondary extrusion structure, and the resonant frequency of the high-speed differential cable model of the secondary extrusion structure in the target frequency band was determined. The resonant frequency of the high-speed differential cable model of the secondary extrusion structure is compared with the resonant frequency determined by the initial correspondence. The initial correspondence is updated based on the comparison results to obtain the correspondence between the structural parameters and the resonant frequency.

[0130] Optionally, the construction module 905 is further configured to: Based on the correspondence, at least one candidate structural parameter combination is determined, and the candidate structural parameter combination includes at least the stranding pitch and / or the number of strands; Based on the combination of candidate structural parameters, a target high-speed differential cable model to be verified is constructed, and a full-wave electromagnetic simulation is performed on each of the target high-speed differential cable models to be verified under the same simulation conditions to determine the resonant frequency point of each target high-speed differential cable model to be verified in the target frequency band. The resonant frequency of each of the target high-speed differential cable models to be verified is compared and verified with the resonant frequency determined by the corresponding relationship. When the comparison result meets the preset deviation threshold, the corresponding candidate structural parameter combination is determined as the target structural parameter, and the target high-speed differential cable model is constructed based on the target structural parameter; The candidate structural parameter combinations include: reducing the number of strands to reduce the shielding layer length and the actual length of the straightened stranded wire simultaneously, and / or reducing the stranding pitch to reduce the shielding layer length and the actual length of the straightened stranded wire.

[0131] Each module in the aforementioned high-speed differential cable construction device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0132] In one embodiment, a computer device is provided, which may be a terminal device, and its internal structure diagram may be as follows: Figure 10 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a readable storage medium storing computer-readable instructions. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer-readable instructions implement a high-speed differential cable construction method. The readable storage medium provided in this embodiment includes both non-volatile and volatile readable storage media.

[0133] In this application embodiment, a computer device is provided, including a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor. When the processor executes the computer-readable instructions, it implements the steps of the high-speed differential cable construction method described above.

[0134] In one embodiment of the application, a readable storage medium is provided, which stores computer-readable instructions. When the computer-readable instructions are executed by a processor, they implement the steps of the high-speed differential cable construction method described above.

[0135] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing related hardware with computer-readable instructions. These computer-readable instructions can be stored in a non-volatile readable storage medium or a volatile readable storage medium. When executed, these computer-readable instructions can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0136] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0137] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 this application, and should all be included within the protection scope of this application.

Claims

1. A method for constructing a high-speed differential cable, characterized in that, The method includes: Obtain high-speed differential cable models with various structures; Under the same simulation conditions, full-wave electromagnetic simulation was performed on the high-speed differential cable model to obtain the transmission parameters corresponding to each high-speed differential cable model. The resonant frequency of each high-speed differential cable model in the target frequency band is determined based on the transmission parameters. Based on the structural parameters of the high-speed differential cable model, the resonant frequency is analyzed analytically to establish the correspondence between the structural parameters and the resonant frequency. Based on the correspondence, at least one target structural parameter is determined, and a target high-speed differential cable model is constructed based on the at least one target structural parameter. The method involves analyzing the resonant frequency point using the structural parameters of the high-speed differential cable model to establish the correspondence between the structural parameters and the resonant frequency, including: Determine the effective dielectric constant of the high-speed differential cable model, and determine the propagation speed based on the effective dielectric constant; The common-mode resonant frequency is calculated based on the shielding layer length and the propagation speed. The differential mode resonant frequency is calculated based on the actual length of the straightened stranded wire and the propagation speed. The resonant frequency of the periodic structure is calculated based on the twist pitch and the propagation velocity. The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish the correspondence between the structural parameters and the resonant frequencies. The step of mapping the common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency to the resonant frequency point to establish the correspondence between the structural parameters and the resonant frequency includes: The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish an initial correspondence between the structural parameters and the resonant frequencies. While keeping the conductor size unchanged, a secondary extruded dielectric layer is wrapped around the high-speed differential cable model with a primary extrusion structure to construct a high-speed differential cable model with a secondary extrusion structure. Under the same simulation conditions, a full-wave electromagnetic simulation was performed on the high-speed differential cable model of the secondary extrusion structure, and the resonant frequency of the high-speed differential cable model of the secondary extrusion structure in the target frequency band was determined. The resonant frequency of the high-speed differential cable model of the secondary extrusion structure is compared with the resonant frequency determined by the initial correspondence. The initial correspondence is updated based on the comparison results to obtain the correspondence between the structural parameters and the resonant frequency; The method further includes, after mapping the common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency to the resonant frequency points to establish the correspondence between the structural parameters and the resonant frequencies: The results of electric field and current distribution from full-wave electromagnetic simulation were used for auxiliary verification. Observe the enhancement of common-mode current standing wave along the shielding path near the common-mode resonant frequency; The phenomenon of electric field concentration enhancement in the gap region of the differential conductor was observed near the differential mode resonant frequency. A periodic reflection enhancement phenomenon was observed along the propagation direction near the resonant frequency of the periodic structure.

2. The high-speed differential cable construction method as described in claim 1, characterized in that, The high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. Obtaining multiple high-speed differential cable models with different structures includes: High-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure were established in the preset full-wave electromagnetic simulation software. When establishing the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure, and stranded structure, at least the model length, conductor radius, dielectric layer outer diameter, and sheathing form should be consistent, and the conductor material properties should be consistent with the dielectric material properties.

3. The high-speed differential cable construction method as described in claim 1, characterized in that, The high-speed differential cable models with different structures include high-speed differential cable models with single-extrusion structure, double-extrusion structure, and stranded structure. Full-wave electromagnetic simulation is performed on the high-speed differential cable models under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model, including: The same frequency domain sweep range and sampling points are set for the high-speed differential cable models of the primary extrusion structure, secondary extrusion structure and stranded structure. After setting the port excitation mode and boundary conditions respectively, the electromagnetic field solution is run to obtain the transmission parameters.

4. The high-speed differential cable construction method as described in claim 1, characterized in that, The transmission parameters include differential insertion loss parameters, and determining the resonant frequency of each of the high-speed differential cable models in the target frequency band based on the transmission parameters includes: Determine the curves of the differential insertion loss parameters as a function of frequency for each of the aforementioned high-speed differential cable models; Determine the peak points and / or valley points within the target frequency band of the curve; The frequencies corresponding to the peak points and / or valley points are determined as the resonant frequencies.

5. The method for constructing a high-speed differential cable as described in any one of claims 1 to 4, characterized in that, The step of determining at least one target structural parameter based on the correspondence, and constructing a target high-speed differential cable model based on the at least one target structural parameter, includes: Based on the correspondence, at least one candidate structural parameter combination is determined, and the candidate structural parameter combination includes at least the stranding pitch and / or the number of strands; Based on the combination of candidate structural parameters, a target high-speed differential cable model to be verified is constructed, and a full-wave electromagnetic simulation is performed on each of the target high-speed differential cable models to be verified under the same simulation conditions to determine the resonant frequency point of each target high-speed differential cable model to be verified in the target frequency band. The resonant frequency of each of the target high-speed differential cable models to be verified is compared and verified with the resonant frequency determined by the corresponding relationship. When the comparison result meets the preset deviation threshold, the corresponding candidate structural parameter combination is determined as the target structural parameter, and the target high-speed differential cable model is constructed based on the target structural parameter; The candidate structural parameter combinations include: reducing the number of strands to reduce the shielding layer length and the actual length of the straightened stranded wire simultaneously, and / or reducing the stranding pitch to reduce the shielding layer length and the actual length of the straightened stranded wire.

6. A high-speed differential cable construction device, characterized in that, The device includes: The acquisition module is used to acquire high-speed differential cable models with various different structures. The simulation module is used to perform full-wave electromagnetic simulation on the high-speed differential cable model under the same simulation conditions to obtain the transmission parameters corresponding to each high-speed differential cable model. The determination module is used to determine the resonant frequency of each of the high-speed differential cable models in the target frequency band based on the transmission parameters; The analysis module is used to perform analytical analysis on the resonant frequency point by combining the structural parameters of the high-speed differential cable model, so as to establish the correspondence between the structural parameters and the resonant frequency; A construction module is used to determine at least one target structural parameter according to the correspondence, and to construct a target high-speed differential cable model based on the at least one target structural parameter; Optionally, the analysis module is further configured to: Determine the effective dielectric constant of the high-speed differential cable model, and determine the propagation speed based on the effective dielectric constant; The common-mode resonant frequency is calculated based on the shielding layer length and the propagation speed. The differential mode resonant frequency is calculated based on the actual length of the straightened stranded wire and the propagation speed. The resonant frequency of the periodic structure is calculated based on the twist pitch and the propagation velocity. The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish the correspondence between the structural parameters and the resonant frequencies. Optionally, the analysis module is further configured to: The common-mode resonant frequency, the differential-mode resonant frequency, and / or the periodic structure resonant frequency are mapped to the resonant frequency points to establish an initial correspondence between the structural parameters and the resonant frequencies. While keeping the conductor size unchanged, a secondary extruded dielectric layer is wrapped around the high-speed differential cable model with a primary extrusion structure to construct a high-speed differential cable model with a secondary extrusion structure. Under the same simulation conditions, a full-wave electromagnetic simulation was performed on the high-speed differential cable model of the secondary extrusion structure, and the resonant frequency of the high-speed differential cable model of the secondary extrusion structure in the target frequency band was determined. The resonant frequency of the high-speed differential cable model of the secondary extrusion structure is compared with the resonant frequency determined by the initial correspondence. The initial correspondence is updated based on the comparison results to obtain the correspondence between the structural parameters and the resonant frequency.

7. A computer device comprising a memory, a processor, and computer-readable instructions stored in the memory and running on the processor, characterized in that, When the processor executes the computer-readable instructions, it implements the high-speed differential cable construction method as described in any one of claims 1 to 5.

8. A readable storage medium having computer-readable instructions stored thereon, characterized in that, When the computer-readable instructions are executed by a processor, they implement the high-speed differential cable construction method as described in any one of claims 1 to 5.

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