RIS RF Modeling for Accurate Electromagnetic Field Simulation

The patent segments the simulation process into two parts: using ray tracing for general electromagnetic wave propagation simulation to maintain speed, and applying a dedicated RIS radio frequency model to specifically account for the physical structure and mutual coupling effects of RIS elements to improve accuracy. This segmentation allows both methods to work together without compromising overall simulation efficiency.

The patent introduces an intermediary RIS radio frequency model that acts as a bridge between the ray tracing method and the physical reality of RIS. This model incorporates the actual physical structure, element spacing, and mutual coupling characteristics of RIS, serving as a mediator that corrects the simplifications made by pure ray tracing while maintaining computational efficiency.

The patent changes the parameters of the RIS model from simple mathematical representations to physical parameters including element spacing, substrate boundary effects, and mutual coupling coefficients. By incorporating these physical parameters into the simulation model, the system can accurately represent the real-world behavior of RIS while maintaining a structured approach to model complexity.

The patent makes the RIS model dynamic by allowing the simulation to adaptively adjust parameters such as mutual coupling effects and boundary conditions based on the specific configuration being simulated. This dynamic modeling approach enables the system to handle varying degrees of complexity without requiring a completely new model for each scenario.

The patent performs preliminary calculations of power ratios and relay gains during the model establishment phase, storing these parameters for reuse in subsequent simulations. By pre-computing these complex parameters, the system avoids redundant calculations during actual simulation runs, thereby improving accuracy without proportionally increasing computational complexity during operation.

The patent creates a simplified copy or representation of the complex radio frequency model that can be efficiently used in ray tracing simulations. This copied model retains the essential physical characteristics and mutual coupling effects but is formulated in a way that is computationally efficient, allowing accurate simulation without the full complexity of a complete electromagnetic simulation.