Understanding RF Cable Assembly Testing: A Complete Guide

## Introduction to RF Cable Assembly Testing Testing RF cable assemblies is critical to ensuring reliable performance in demanding applications. This guide covers the essential testing methodologies used in aerospace and defence industries. ## Vector Network Analyzer (VNA) Testing The VNA is the primary instrument for characterizing RF cable assemblies. It measures: - **S-Parameters**: S11 (return loss), S21 (insertion loss), S12, S22 - **Phase Response**: Critical for phase-matched assemblies - **Group Delay**: Important for signal integrity ## VSWR Measurements Voltage Standing Wave Ratio (VSWR) indicates impedance matching quality: - Excellent: < 1.15:1 - Good: 1.15:1 to 1.25:1 - Acceptable: 1.25:1 to 1.50:1 ## Best Practices 1. Calibrate before every test session 2. Use quality test fixtures 3. Document all measurements 4. Maintain environmental controls ## Conclusion Proper testing ensures your RF cable assemblies meet specifications and perform reliably in the field.