Characterization of RF Micro-Coaxial Cable Insertion Loss Degradation
RF micro-coaxial insertion loss escalates through skin-depth resistance, dielectric loss tangent shifts, mechanical flex displacement, and atmospheric oxidation.
Micro-Coaxial Cable
Meaning
Specialized electrical interconnects utilize a central conductor surrounded by a dielectric insulator and a metallic shield to transmit high-frequency signals. Within compact electronic assemblies, micro-coaxial cable provides the necessary link between a radio module and its antenna or a display panel and the main logic board. These cables are characterized by their extremely small outer diameter, which often measures less than one millimeter to fit through narrow hinges or tight enclosures.
This specific form factor allows for the dense packaging of components in portable hardware.
Mechanical Design
Flexible construction allows the wiring to withstand repeated bending in mobile devices or laptop screens. When using micro-coaxial cable, engineers must account for the minimum bend radius to prevent damage to the internal shielding. This design provides a balance between physical durability and the space constraints of modern industrial design.
Signal Integrity
Controlled impedance is maintained by the precise geometry of the conductor and the surrounding insulation layers. Shielded micro-coaxial cable minimizes signal loss and protects the data stream from external electromagnetic interference. This performance is essential for maintaining the high throughput required by wireless standards such as wi-fi 6 or 5G.
Integration Constraint
Termination involves soldering the fine shield and core wires to miniature connectors or directly to the printed circuit board. Using micro-coaxial cable requires specialized automated equipment to ensure consistent electrical contact and mechanical strength. This assembly step is a primary factor in the overall cost and reliability of the final product.