RF Connector Assembly for PCB Soldering and Mechanical Stability
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Solution Overview
Problem
Existing RF connectors for printed circuit boards face challenges in achieving a balance between mechanical and electrical stability while minimizing installation complexity and cost.
Innovation Solution
An RF connector design featuring a small RF socket with a larger port flange and a centering nut that ensures alignment and mechanical stability, allowing easy installation without the need for complex tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a small sized coaxial contact terminal is used, then the soldering process is simplified, but the mechanical stability of the connector decreases
Solution Approach 1:
The connector is divided into two functional parts: a small RF socket for PCB mounting and soldering, and a separate port flange for mechanical support and cable connection. This segmentation allows each part to be optimized independently - the small socket simplifies soldering while the separate flange provides mechanical stability.
Solution Approach 2:
The RF socket is nested within the port flange assembly, with the socket having a smaller diameter than the flange's through-hole. The centering nut further nests between these components to ensure proper alignment. This nested structure enables the small socket to benefit from the larger flange's mechanical strength.
2Strength
If a large outer conductor is used, then the mechanical stability is improved, but the soldering process becomes more complex and requires higher temperatures and mechanical loads
Solution Approach 1:
The connector structure separates the mechanical support function (port flange with large outer conductor) from the soldering function (RF socket with small coaxial terminal). This allows the large flange to provide mechanical stability while the small socket remains easy to solder.
Solution Approach 2:
Different parts of the connector have different sizes optimized for their specific functions: the RF socket has a small diameter suitable for soldering, while the port flange has a large diameter for mechanical strength. The centering nut bridges these different local qualities to ensure proper alignment.
3Strength
If clamping is used to fasten connectors with large outer conductors, then the mechanical stability is improved, but the electrical stability decreases
Solution Approach 1:
The connector separates mechanical fastening (port flange to PCB) from electrical connection (coaxial terminal to PCB trace). This allows clamping to be used for mechanical stability without compromising electrical stability, as the electrical connection is made through the soldered coaxial terminal.
4Manufacturing precision
If centering tools are used during installation, then the alignment precision is improved, but the installation process becomes more laborious due to the need to remove tools afterwards
Solution Approach 1:
The centering nut is pre-installed on the RF socket before mounting to the PCB. This preliminary action ensures that the socket is already centered and aligned when the port flange is attached, eliminating the need for separate centering tools during installation and reducing labor time.
Solution Approach 2:
The centering nut acts as an intermediary component between the RF socket and port flange, providing built-in centering functionality. This eliminates the need for external centering tools and makes the centering function permanent part of the assembly process.
Data Source
Figure 1~2
AI summary
An RF connector for contacting a printed circuit board (PCB) comprises an RF socket configured to be mounted to the PCB, the RF socket providing a coaxial terminal with a first diameter; a port flange configured to be plugged on the RF socket and providing a plug-in port with a second diameter for receiving another RF connector to be contacted to the RF socket, the second diameter being larger than the first diameter; and a centering nut configured to be disposed between the RF socket and the port flange for centering the port flange with respect to the RF socket, wherein the centering nut has an inner diameter corresponding to the first diameter of the RF socket and an outer diameter corresponding to the second diameter of the port flange.