Antenna Point-Source Model for Near-Field Simulation
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Solution Overview
Problem
Current simulation methods for antenna arrays, such as full-wave simulations, require significant computational resources and time, while asymptotic numerical methods cannot accurately model near-field interactions, limiting the ability to optimize antenna placement and configuration effectively.
Innovation Solution
A point-source model is generated to simulate near-field effects from antenna structures, transforming near-field values into far-field radiation patterns, allowing for accurate and efficient simulation of electromagnetic interactions using asymptotic numerical methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If full-wave simulation methods are used to simulate electromagnetic interactions, then measurement precision is improved, but productivity deteriorates due to considerable computational resources and time required
Solution Approach 1:
The patent segments the simulation process into two distinct phases: (1) a full-wave simulation phase that accurately models the antenna array and near-field structures to extract near-field values, and (2) an asymptotic simulation phase that uses these extracted values to efficiently simulate far-field interactions with vehicle structures. This segmentation allows each method to be applied where it is most effective, resolving the contradiction between accuracy and efficiency.
Solution Approach 2:
The patent performs preliminary full-wave simulation to extract near-field values before conducting the main asymptotic simulation. By pre-computing and storing the near-field electromagnetic values from a detailed full-wave model, the system eliminates the need to repeatedly perform computationally intensive full-wave simulations for different vehicle structures, thereby improving productivity while maintaining precision through the use of accurate preliminary data.
2Productivity
If asymptotic numerical methods are used to reduce computational costs, then productivity is improved, but measurement precision deteriorates because near-field interactions cannot be simulated
Solution Approach 1:
The patent performs a preliminary full-wave simulation to extract accurate near-field electromagnetic values before conducting the asymptotic simulation. This preliminary action ensures that the near-field interactions are accurately captured in advance, allowing the subsequent asymptotic method to focus only on far-field interactions, thereby maintaining measurement precision while improving productivity.
Solution Approach 2:
The patent introduces near-field values as an intermediary between the full-wave simulation and the asymptotic simulation. These extracted near-field values serve as boundary conditions or source terms for the asymptotic numerical method, enabling it to accurately represent near-field effects without directly solving the computationally intensive near-field problem, thus resolving the precision-productivity contradiction.
3Measurement precision
If detailed mesh models are used to represent antenna structures, then measurement precision is improved, but productivity deteriorates due to the complexity of solving dense mesh models
Solution Approach 1:
The patent segments the modeling approach by creating detailed mesh models only for the antenna array and immediate near-field structures where high precision is critical, while using asymptotic methods with less detailed representations for the vehicle structures in the far-field. This segmentation allows detailed modeling where necessary without the computational burden of detailed modeling everywhere, improving productivity while maintaining measurement precision in critical regions.
Solution Approach 2:
The patent performs preliminary full-wave simulation on the detailed antenna mesh model to extract near-field values, then uses these pre-computed values in subsequent asymptotic simulations. By pre-processing the detailed model once and reusing its results, the system avoids repeatedly solving the dense mesh equations for different scenarios, thereby improving productivity while preserving the precision benefits of the detailed model.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces computational costs and simulation time, enabling quick and accurate modeling of antenna interactions with various structures, including complex vehicle components, and improves the optimization of antenna placement and performance.
Implementation Method 1
The method generates, using a near-field-to-far-field transformation on the extracted near-field value, far-field radiation patterns for the respective active elements
Data Source
AI summary
This document describes techniques and systems to generate a point-source model for simulating near-field effects from structures of an antenna. The techniques and systems generate, based on near-field values extracted from electromagnetic simulations, respective far-field radiation patterns for active elements and, in some cases, passive elements of the antenna array. The far-field radiation patterns account for electromagnetic interactions between the active elements and an antenna structure, which can include passive elements of the antenna array. The techniques and systems output the far-field radiation patterns, which are effective to simulate, using an asymptotic numerical method, electromagnetic interactions between the antenna array and at least one interaction structure. Using the described point-source model, engineers can quickly and accurately simulate electromagnetic interactions between the antenna array and the interaction structure for various configurations and applications of the antenna array.