RF Circuit Radiative Contamination Estimation via Coupled Power Lists
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for validating RF modules prior to production are inefficient due to the complexity and error-prone nature of incorporating radiative couplings between metal traces on printed circuit boards, which alter circuit performance significantly, making it challenging to identify and reduce significant couplings.
Innovation Solution
A method that estimates radiative contamination in RF circuits by using a coupled radiation matrix and circuit model to identify nodes with significant radiative interference, allowing for redesign of the PCB layout without the need for precise EM/circuit co-simulation, by generating a coupled power list and replacing design power values with summed coupled power values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed EM simulation is performed to incorporate radiative couplings between metal traces, then measurement precision of circuit performance is improved, but device complexity and computational load increase significantly
Solution Approach 1:
The patent segments the radiative coupling analysis by creating a simplified model that processes only the most significant couplings rather than all possible trace interactions. The method identifies and analyzes only the top N significant radiative couplings at each node, dividing the complex full EM simulation into manageable segments that maintain accuracy while reducing computational complexity.
Solution Approach 2:
The patent extracts the essential radiative coupling information from the complex EM simulation by using a simplified coupled radiation matrix approach. Instead of performing complete EM simulation for all traces, the method extracts and processes only the significant coupling contributions, removing unnecessary computational complexity while preserving the critical performance validation accuracy.
2Measurement precision
If complete EM/circuit co-simulation is performed to account for all radiative couplings, then measurement precision is improved, but productivity decreases due to extensive computational resources required
Solution Approach 1:
The patent applies partial action by analyzing only the most significant radiative couplings rather than all possible couplings. The method processes the top N significant couplings at each node, which provides sufficient accuracy for validation while dramatically reducing computational time and resources compared to complete co-simulation of all trace interactions.
Solution Approach 2:
The patent performs preliminary identification and sorting of significant couplings before performing the full analysis. By pre-determining which couplings are most significant based on coupling strength metrics, the method can process only those critical couplings in detail, thereby reducing overall computational requirements while maintaining validation precision.
3Measurement precision
If detailed mapping of EM simulator output to circuit nodes is performed, then measurement precision is improved, but device complexity and error rate increase
Solution Approach 1:
The patent introduces an intermediary coupled radiation matrix that serves as a mediator between the EM simulation results and the circuit node analysis. This matrix structure provides a standardized interface that simplifies the mapping process by pre-organizing coupling information in a format that directly corresponds to circuit nodes, thereby reducing mapping complexity and potential errors.
Solution Approach 2:
The patent applies local quality by tailoring the coupling analysis to specific local conditions at each circuit node. Instead of a uniform global mapping approach, the method identifies and processes significant couplings locally at each node based on its specific circuit context, which simplifies the overall mapping process while maintaining precision for each local analysis.
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
Enables quick identification of problematic radiative couplings, facilitating redesign to reduce interference and improve signal integrity, without requiring extensive computational resources or precise EM simulation, thus streamlining the validation process.
Implementation Method 1
the radiative couplings between the metal traces on the circuit board can significantly alter the performance of the circuit because one or more of the metal traces radiate energy and can receive radiative energy from other traces
Data Source
AI summary
A method for operating a data processing system to generate an estimate of radiative contamination at nodes in an RF circuit characterized by a plurality of circuit elements connected by metal traces on a circuit board are disclosed. The data processing system to receive information specifying a coupled radiation matrix based on the metal traces and a simulation of an RF circuit with the components connected by non-radiating nodes. The data processing system generates a coupled power list for at least one node of the model, each entry in the coupled power list includes a coupled power value indicating a power level received by EM radiation from another of the nodes.