Coaxial Cable Connector With Compression Mechanism For PIM Reduction
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Solution Overview
Problem
Field-installable coaxial cable connectors face challenges in maintaining consistent impedance and reducing passive intermodulation (PIM) due to insecure and nonlinear contact between conductive components, leading to signal interference and communication disruptions in cellular networks.
Innovation Solution
A connector design that concurrently advances and secures both the center and outer conductors of a coaxial cable, using a compression mechanism with a pin and socket configuration to ensure stable contact and prevent deformation, thereby maintaining impedance matching and minimizing PIM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connector is designed to allow axial movement during assembly, then ease of operation is improved, but contact stability between conductors deteriorates
Solution Approach 1:
The connector body is pre-configured with a tapered bore that guides and pre-aligns the center conductor during insertion. This preliminary alignment action ensures that when the connector reaches its final position, the conductors are already properly positioned for stable contact, eliminating the need for additional adjustment movements during assembly.
Solution Approach 2:
A compression member acts as an intermediary element between the connector body and the conductors. This compression member transfers and distributes the assembly force uniformly to both the center and outer conductors, ensuring simultaneous compression and stable contact without requiring precise manual positioning during the assembly process.
2Reliability
If compression force is applied to secure conductors, then contact stability is improved, but risk of conductor deformation increases
Solution Approach 1:
The compression member features a non-uniform cross-sectional geometry with different compression zones. The first cross-sectional area is larger than the second, creating localized compression regions that apply higher pressure to the outer conductor while the tapered bore provides a larger clearance zone for the center conductor. This local quality differentiation allows stable contact without deforming the delicate center conductor.
Solution Approach 2:
The compression member's geometric parameters are specifically designed with a tapered profile where the cross-sectional area changes along its length. This parameter variation allows the compression force to be distributed differently at different locations, applying sufficient compression for stable contact while preventing excessive force that would deform the conductors.
3Ease of operation
If threaded components are used to maintain contact force, then ease of operation is improved, but long-term contact stability deteriorates due to component separation
Solution Approach 1:
The threaded mechanical fastening system is replaced with a compression member that relies on elastic deformation and friction-based compression. The compression member is inserted and automatically secures the conductors through its compressed state, eliminating threaded components entirely. This substitution maintains ease of assembly while ensuring long-term stability through continuous compression force from the elastic material.
Solution Approach 2:
The compression member is designed to be self-securing through its material properties and geometric configuration. When inserted into the connector body, it automatically compresses and secures both conductors in place through its elastic recovery force, requiring no additional fastening operations and maintaining its securing function over time without loosening or separation.
Data Source
AI summary
A connector for a cable, in one embodiment, has a body configured to receive a cable. The connector has a plurality of contacts moveably positioned within the body, and the connector has a component configured to slide or axially move.