RF Inductor Design Considerations for 5G Applications

RF inductors are critical in 5G front-end modules, filters and matching networks. Their quality factor (Q) and self-resonant frequency (SRF) often determine overall system performance.

What matters in RF design

• High Q: minimizes insertion loss in matching networks and resonators.
• High SRF: ensures the inductor behaves like an inductor at the operating frequency.
• Tight tolerance: important for reproducible filter performance in volume production.
• Wire-wound vs. multilayer: wire-wound parts generally offer higher Q; multilayer parts are more compact.

Layout tips

• Keep RF inductors away from ground planes to reduce parasitic capacitance.
• Use grounded guard rings to reduce coupling between adjacent inductors.
• Simulate the full matching network, including pad parasitics.

ANFULLY supplies RF inductors from 0402 to 0805 with Q and SRF curves documented, plus design-in support from our RF application engineers.

This article was written by fifi. Reproduction with attribution is welcome.