USB Receptacle Shielding and Grounding for EMI Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High frequency interferences and electromagnetic interferences in thin, high-speed USB electrical connectors impact the performance of devices such as Bluetooth devices, mobile phones, laptops, and hard disc drives, necessitating a solution that enhances reliability and reduces interference.
Innovation Solution
The electrical receptacle connector incorporates a grounding system with protrusion or spring arm connecting structures and a shielding member to electrically connect grounding contacts and shield signal contacts, effectively grounding electromagnetic noises and reducing interference during high frequency transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the electrical connector is designed with thin thickness to meet device miniaturization requirements, then the device thickness is reduced, but high frequency interferences and electromagnetic interferences increase among contacts
Solution Approach 1:
A grounding member is introduced as an intermediary element between the signal contacts and the grounding contact. This grounding member includes a grounding body in contact with the grounding contact and a shielding body extending from the grounding body to shield the signal contacts, thereby mediating the electromagnetic environment and reducing interference in thin connectors
Solution Approach 2:
The shielding body is positioned specifically adjacent to the signal contacts to provide localized electromagnetic shielding where it is most needed. The grounding member is disposed between the insulation housing bracket and the shell, creating a localized shielded zone around the vulnerable signal transmission path
2Speed
If high speed transmission is implemented to meet performance requirements, then transmission speed is improved, but electromagnetic interferences and signal crosstalk increase
Solution Approach 1:
The grounding member acts as an intermediary shielding structure that isolates signal contacts from each other and from external electromagnetic fields, enabling high speed transmission by preventing signal degradation and crosstalk that would otherwise occur at high frequencies
Solution Approach 2:
The grounding system converts the potentially harmful electromagnetic fields generated by high speed signals into controlled current paths through the grounding contact, dissipating energy that would otherwise cause interference and improving overall signal integrity
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 design improves high frequency and high-speed transmission performance by reducing electromagnetic interferences and crosstalk between signal contact sets, ensuring reliable operation of connected devices.
Implementation Method 1
The first grounding member mechanically contacts with the first receptacle grounding contact, such that the first grounding member is electrically connected to the first receptacle grounding contact
Implementation Method 2
The shielding member is disposed between the first signal contact set and the second signal contact set. The shielding member is for shielding the first signal contact set and the second signal contact set
Data Source
AI summary
An electrical receptacle connector includes a receptacle shell, an insulation housing bracket, a receptacle grounding contact, and a grounding member. The insulation housing bracket is disposed inside the receptacle shell. The receptacle grounding contact is held inside the housing base. The grounding member is disposed on a first side of the insulation housing bracket and located between the insulation housing bracket and the receptacle shell. A connecting structure is selectively disposed on the grounding member or on the receptacle grounding contact. The connecting structure penetrates through the insulation housing bracket and mechanically or physically connects the grounding member and the receptacle grounding contact such that the grounding member is electrically connected to the receptacle grounding contact.