Coaxial Connector Ground Coupling for Stable RF Transmission
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Solution Overview
Problem
Existing coaxial connector coupling structures can generate unnecessary electrical potential differences, leading to noise radiation and unstable signal transmission in the radio frequency band due to the lack of effective ground coupling between connectors.
Innovation Solution
A ground coupling structure in a coaxial connector set that includes a shortcut coupling path between the tip surrounding portion of the first outer terminal and the second outer terminal or the ground coupling portion of the circuit board, using interposing members, bridge coupling portions, or shield members to create a direct and short electrical connection, thereby reducing potential differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional coaxial connector coupling structure is used, then the connector assembly is simple in structure, but unnecessary electrical potential differences are generated leading to noise radiation and unstable signal transmission
Solution Approach 1:
The patent introduces an intermediary ground coupling structure consisting of a ground coupling portion on the connector housing and a corresponding ground contact portion on the mating connector. This intermediary structure provides a dedicated low-impedance path for ground potential equalization, eliminating the need for complex external grounding arrangements while ensuring stable signal transmission in the RF band.
Solution Approach 2:
The patent adds a spatial dimension to ground coupling by extending the ground coupling portion from the connector housing toward the circuit board mounting surface, and positioning the ground contact portion to engage with it. This three-dimensional arrangement creates a direct ground path that bypasses the outer conductor connection path, reducing potential differences without increasing planar complexity.
2Reliability
If the outer conductor connection path is used for ground coupling, then the structure is simple, but the coupling path is long causing electrical potential differences and noise radiation
Solution Approach 1:
The patent creates a new intermediary ground coupling path that bypasses the long outer conductor connection path. The ground coupling portion and ground contact portion serve as intermediaries to establish a direct, short-distance electrical connection between the two connectors' ground systems, eliminating potential differences before they can cause noise radiation.
Solution Approach 2:
The patent segments the ground coupling function from the signal transmission function. The outer conductor connection path remains dedicated to signal transmission, while the separate ground coupling portion and ground contact portion handle ground potential equalization. This segmentation allows optimization of each path independently, keeping the ground path short and effective.
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 ensures stable signal transmission in the radio frequency band by minimizing electrical potential differences and maintaining connectivity even during connector alignment shifts, ensuring reliable performance in megahertz and gigahertz bands.
Implementation Method 1
A shortcut coupling path is formed between the tip surrounding portion and the second outer terminal or the ground coupling portion
Data Source
AI summary
A coaxial connector set including a first connector to which a coaxial cable having a center conductor and an outer conductor is connected, and a second connector mounted on a circuit board having a ground coupling portion. The first connector has a first outer terminal, and the second connector has a second outer terminal. The first outer terminal has an outer conductor clamp portion, a first outer contact portion, and a tip surrounding portion positioned between the outer conductor clamp portion and the first outer contact portion and surrounding a tip portion of the center conductor. Shortcut coupling paths are formed between the tip surrounding portion and the second outer terminal or the ground coupling portion.