From 1 GHz to beyond 40 GHz — how F4B’s low Dk and low Df hold up in each band, and where it outperforms FR-4 and even RO4350B.
The frequency range of F4B materials typically spans from 1 GHz to 40 GHz and beyond. Its high-frequency performance advantages are primarily reflected in its low dielectric constant and low dielectric loss, as detailed below.
Typical applications: Mid-to-high frequency fields such as 5G communication base stations, radar systems, and satellite communications.
Performance characteristics:
Typical applications: Millimeter-wave communications (e.g., 24 GHz, 28 GHz, 39 GHz bands), automotive radar (77 GHz), medical imaging, and other ultra-high-frequency fields.
Performance characteristics:
Typical application scenarios: Extreme high-frequency fields such as satellite communications and aerospace.
Performance:
For other PTFE-based laminates, see our high-frequency microwave and RF materials overview.
Common questions about the F4B frequency range.
F4B typically covers 1 GHz to 40 GHz and beyond. Standard grades perform well up to 40 GHz, while optimized variants such as F4BTMS300 extend usability beyond 40 GHz with a Df of 0.0019.
RO4350B has a Df of 0.0037 at 10 GHz. F4B's lower Df (0.0013–0.0015 in the same region) gives it lower loss in the 20–40 GHz bands, making it more suitable for UHF applications.
Yes. From -55°C to +200°C, F4B's dielectric constant and loss factor show minimal variation, which protects signal integrity in aerospace and satellite environments.
F4B grades span roughly Dk 2.2–3.6. For example, F4BM265 measures 2.65 ± 0.05 at 10 GHz with minimal drift across frequency.
Tell us your operating frequency and loss budget. We will recommend the right F4B grade, confirm stack-up feasibility and quote your high-frequency PCB.
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