Circuit Board Trace Width Segmentation for High-Frequency Noise Control
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Solution Overview
Problem
Components on terminals are easily affected by high-frequency noise passing through lines, particularly affecting components like antennas.
Innovation Solution
A circuit board component with traces having varying line widths, including a first portion with a line width greater than or equal to a threshold and a second portion with a line width less than the threshold, and an auxiliary trace connected to the second portion, which reduces equivalent coupling capacitance and improves high-frequency impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the line width of the trace is reduced to improve high-frequency impedance, then the high-frequency noise suppression is improved, but the direct current resistance increases
Solution Approach 1:
The trace is divided into multiple segments with different line widths. The first portion has a line width greater than or equal to a threshold to maintain low DC resistance, while the second portion has a line width less than the threshold to provide high-frequency impedance. This segmentation allows the trace to simultaneously achieve good DC conductivity and high-frequency noise suppression.
Solution Approach 2:
Different portions of the trace are given different line width characteristics tailored to their specific functional requirements. The first portion uses a larger line width optimized for current carrying capacity, while the second portion uses a smaller line width optimized for high-frequency signal filtering. This local differentiation resolves the contradiction between DC resistance and high-frequency impedance.
2Object-affected harmful factors
If the line width of the trace is reduced to improve high-frequency impedance, then the high-frequency signal influence on other components is reduced, but the trace structure complexity increases
Solution Approach 1:
The trace is segmented into distinct portions with different line widths, where the first portion has width >= threshold and the second portion has width < threshold. This segmentation provides a systematic approach to managing high-frequency signals while maintaining manufacturing feasibility through clear design guidelines.
Solution Approach 2:
The line width parameter of the trace is changed along its length to achieve different electrical characteristics. By transitioning from a larger line width in the first portion to a smaller line width in the second portion, the trace achieves high-frequency impedance without requiring complex multi-layer structures or additional components.
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
Reduces the influence of high-frequency signals on other components, enhances antenna reception, and lowers energy consumption while maintaining direct current resistance.
Implementation Method 1
the auxiliary trace is disposed between the circuit board and the second portion, and the auxiliary trace is electrically connected to the trace... reduces equivalent coupling capacitance and improves high-frequency impedance
Data Source
Figure 1
AI summary
Provided are a circuit board component and a terminal. The circuit board component includes: a circuit board and a wire disposed on the circuit board, where the wire includes a first portion and a second portion, a line width of the first portion is greater than or equal to a line width threshold, and a line width of the second portion is less than the line width threshold.