Staggered Anti-EMI Connector Terminals
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Solution Overview
Problem
In electrical connectors with closely spaced signal terminals, electromagnetic interference (EMI) occurs due to the generation of magnetic fields during high-frequency signal transmission, leading to transmission errors and reduced efficiency, as existing ground pin arrangements provide limited shielding.
Innovation Solution
The anti-EMI electrical connector features a staggered arrangement of first and second terminals within an insulation case, where the second terminals have a larger sectional area than the first, effectively blocking EMI by increasing the shielding area when high-frequency signals are transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pitch between terminals is reduced to increase the number of signal terminals, then the productivity and signal transmission capacity are improved, but electromagnetic interference between adjacent terminals occurs causing transmission errors
Solution Approach 1:
The patent introduces ground terminals as intermediary elements positioned between signal terminals. These ground terminals act as mediators that intercept and divert electromagnetic fields, preventing direct interference between adjacent signal terminals. The ground terminals are electrically connected to the ground reference, creating a shielding effect that protects signal transmission integrity while allowing close spacing of signal terminals.
Solution Approach 2:
The patent applies different terminal types (signal terminals vs. ground terminals) at different locations within the connector. Ground terminals are strategically positioned adjacent to signal terminals specifically where electromagnetic interference is most likely to occur. This localized arrangement provides targeted EMI shielding exactly where needed, rather than uniformly across the entire connector structure.
2Object-affected harmful factors
If ground pins are arranged in a staggered manner to shield EMI between adjacent signal terminals, then some EMI shielding effect is achieved, but the shielding effect is very limited when terminal arrangement is intensive
Solution Approach 1:
The patent segments the terminal arrangement into alternating sequences of signal terminals and ground terminals. Rather than having continuous blocks of signal terminals with occasional ground pins, the connector is divided into repeating units where each signal terminal is locally paired with adjacent ground terminals. This segmentation ensures that every signal terminal has dedicated ground shielding, maintaining effective EMI protection even at high terminal densities.
3Object-affected harmful factors
If the sectional area of ground terminals is increased to improve EMI shielding, then the shielding effect is enhanced, but the space occupied by terminals increases
Solution Approach 1:
The patent uses multiple smaller ground terminals positioned adjacent to each signal terminal rather than relying on a single large ground terminal. Each ground terminal creates a localized shielding zone, and the combined effect of multiple ground terminals provides comprehensive EMI protection. This approach achieves equivalent or superior shielding to a single large ground terminal while occupying less total space and allowing better terminal packing density.
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 configuration significantly reduces EMI between terminals, maintaining electronic signal quality by enhancing the shielding effect and improving electrical characteristics.
Implementation Method 1
the resulting EMI is effectively blocked by the connection end of the second terminal, thereby eliminating the EMI between the first terminals
Implementation Method 2
when a high-frequency current passes through the signal terminal and is switched rapidly, a magnetic field is generated around the signal terminal
Data Source
AI summary
An anti-electromagnetic interference (anti-EMI) electrical connector having a terminal assembly is provided. The anti-EMI electrical connector includes an electrical insulation case, a plurality of first terminals, and a plurality of second terminals. The electrical insulation case includes a slot. Each of the first terminals is respectively disposed in the electrical insulation case, and each of the first terminals respectively includes a contact end located in the slot. Each of the second terminals is respectively disposed in the electrical insulation case, and the second terminals and the first terminals are arranged in a staggered manner. Each of the second terminals respectively includes a connection end located in the slot and adjacent to the contact end of at least one first terminal, in which a sectional area of the connection end of the second terminal is larger than a sectional area of the contact end of the first terminal.