What is the material of a directional coupler
Directional couplers commonly use brass (copper-zinc alloy, 60–70% Cu) for housings for conductivity, PTFE (εr≈2.1, tanδ<0.001) for high-frequency PCB substrates, or ceramic (Al₂O₃, εr≈9.8) for power handling, balancing loss and thermal stability. Common Materials Used A 1 dB increase in insertion loss can degrade system performance by 20%, making low-loss materials non-negotiable for high-frequency applications. […]
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