Connector Ground Contact Layout for Stable 20–25 GHz Signal Transmission
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Solution Overview
Problem
Existing high-frequency signal transmission devices, including connectors and wiring boards, suffer from suboptimal high-frequency signal transmission characteristics due to inadequate grounding and electrical connections.
Innovation Solution
A high-frequency signal transmission device with a connector and wiring board configuration that includes a contact terminal group with signal and ground contact terminals, where ground contact terminals have an arm portion bent to abut against ground contact pads via penetrating electrodes, stabilizing ground potential and enhancing electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ground contact terminal is simply connected to the ground contact pad, then the device complexity is reduced, but the high-frequency signal transmission characteristics deteriorate due to unstable ground potential
Solution Approach 1:
The ground contact terminal employs an elastic arm portion that can dynamically adjust its position and contact pressure. The arm portion is designed with elastic deformation capability, allowing it to automatically adapt to manufacturing tolerances and assembly variations, ensuring stable electrical contact with the ground contact pad while maintaining simple overall structure
Solution Approach 2:
The invention changes the physical state of the ground contact terminal from rigid to elastic by introducing an arm portion with elastic deformation capability. This parameter change allows the terminal to maintain optimal contact pressure and electrical conductivity, improving high-frequency signal transmission characteristics without significantly increasing device complexity
2Reliability
If the ground contact terminal makes point contact with the ground contact pad, then the contact precision is improved, but the electrical connection reliability deteriorates due to insufficient contact area
Solution Approach 1:
The elastic arm portion is designed to distribute contact pressure uniformly across the contact interface with the ground contact pad. By creating an equipotential contact surface, the invention ensures consistent electrical connection reliability while reducing sensitivity to manufacturing position variations, as the extended contact area compensates for alignment tolerances
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
Improves high-frequency signal transmission characteristics by reducing ripple and loss, specifically in the 20-25 GHz band, through stable ground potential and optimized electrical connections.
Implementation Method 1
the one or more ground layers are electrically connected to the ground contact pads via at least one first penetrating electrode penetrating a dielectric layer of the wiring board
Data Source
AI summary
According to an embodiment, high-frequency signal transmission device includes a connector and a wiring board with two cable ends. The connector includes contact terminals with signal contact terminals and ground contact terminals. In a wiring board, signal contact pads, ground contact pads and one or more ground layers are formed on at least one of the cable ends. The ground contact terminal includes an arm portion bent so as to locally abut against the ground contact pad at a contact portion. The contact portion of the arm portion is positioned so as to (i) at least partially abut against a surface of a covering portion of the ground contact pad covering the first penetrating electrode directly above the first penetrating electrode, or (ii) abut against the ground contact pad near an outer periphery of the covering portion, when the wiring board is electrically connected to the connector.