Wireless Terminal Grounding via Capacitance Coupling
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Solution Overview
Problem
The existing rotary USB converter method for wireless terminal devices often experiences increased impedance due to incomplete crimping of grounding spring plates, leading to suboptimal connectivity and production issues.
Innovation Solution
The implementation of capacitance coupling between the conduction and connection module and the printed circuit board (PCB) using insulation material mediums or lumped capacitance components, allowing for a virtual connection that forms a capacitor structure and improves grounding without direct contact, thus reducing impedance and enhancing production quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grounding spring plate is used for USB and PCB connection, then grounding function is achieved, but impedance increases when crimping is incomplete
Solution Approach 1:
The patent replaces the mechanical crimping connection system with a magnetic field coupling system. Instead of relying on physical contact between grounding spring plates and USB/PCB contact points, the invention uses magnetic fields to achieve grounding connection, thereby eliminating the need for precise mechanical crimping and contact point impedance control.
Solution Approach 2:
The patent introduces magnetic field as an intermediary between the USB converter and PCB for grounding connection. The magnetic field acts as a mediator that transfers the grounding function without requiring direct physical contact, thus avoiding the impedance issues associated with mechanical contact points.
2Ease of manufacture
If crimping process is used for grounding spring plate, then grounding connection is established, but production complexity increases due to impedance control requirements
Solution Approach 1:
The patent replaces the mechanical crimping process with a magnetic field-based connection process. This substitution eliminates the need for complex crimping equipment and impedance control mechanisms, simplifying the production process while maintaining grounding functionality.
Solution Approach 2:
The magnetic field coupling system automatically establishes grounding connection without requiring manual adjustment or complex control systems. The system self-regulates the connection quality through magnetic field strength, eliminating the need for manual impedance control during production.
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 facilitates reliable capacitance coupling and grounding, reducing impedance and improving the specific absorption rate (SAR) of electromagnetic waves, while simplifying production and increasing product qualification rates by avoiding resistance control at contact points.
Implementation Method 1
one of the conduction and connection module and the first PCB is connected to one end of the first conductor through a first capacitance coupling module
Data Source
AI summary
A wireless terminal device includes: a conduction and connection module, and a first Printed Circuit Board, PCB, connected to the conduction and connection module, and the wireless terminal device further includes a first conductor, where one of the conduction and connection module and the first PCB is connected to one end of the first conductor through a first capacitance coupling module, and the other one of the conduction and connection module and the first PCB is connected to the other end of the first conductor. Through the foregoing processing, capacitance coupling and grounding between the conduction and connection module and the PCB can be implemented through the first capacitance coupling module.