PCB Exposed-Section Segmentation for Radiation Noise Control
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Solution Overview
Problem
The integration of circuits on PCBs in mobile devices leads to crosstalk and noise radiation due to interference from power, clock, and high-speed data lines, affecting data communication performance and user experience.
Innovation Solution
Adding conductors to divide exposed sections of PCB wires into multiple segments, with ends connected to ground terminals, using SMD resistors, metal sheets, or conductive cloth to minimize noise interference without altering original circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If circuits are arranged near power lines, clock lines or high-speed data lines to increase integration, then circuit density is improved, but noise interference and crosstalk increase
Solution Approach 1:
The exposed section of the wire is divided into multiple sections by adding conductors at preset positions. This segmentation isolates different parts of the exposed section, preventing noise propagation along the entire wire length while maintaining circuit integration.
2Object-affected harmful factors
If conductors are added to divide exposed sections, then noise interference is reduced, but PCB complexity increases
Solution Approach 1:
The conductors are added only at specific preset positions along the exposed section rather than uniformly throughout. This localized approach addresses noise interference at critical points without unnecessarily complicating the entire PCB structure.
3Object-affected harmful factors
If original circuits are modified to reduce noise, then noise interference is reduced, but manufacturing cost and project cycle increase
Solution Approach 1:
Instead of modifying the entire PCB layout or all circuits, the solution applies partial action by adding conductors only to the exposed section of the wire. This minimal modification achieves noise reduction without requiring extensive redesign or re-verification of the entire PCB.
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
Solves noise interference effectively while preserving PCB impedance and performance, saving project cycles and testing resources, and preventing recurrence.
Implementation Method 1
they are prone to crosstalk and noise radiation due to interference signals from the power lines, clock lines or high-speed data lines
Implementation Method 2
two ends of the conductor are respectively electrically connected to a ground terminal of the board body
Data Source
AI summary
Disclosed in the present application are a PCB and a terminal device using the PCB. At least one electric conductor is added on an exposed section of the PCB, so that the exposed section is divided into at least two sections, thereby the problem of noise interference can be solved without extensively changing the original circuit of the PCB. In this way, the project cycle and test resource can be greatly saved, and the problem of radiation noise generated by the exposed section can be completely solved.