RF PCB Materials & Design Center

Choose the material role before comparing a brand

An RF PCB controls the signal path through its laminate, copper, reference planes and transitions. A low Df cannot compensate for an unsuitable return path. Compare complete constructions and retain the conditions behind every value.

For other established routes, see PTFE-based PCB constructions, Nelco material specifications and legacy DuPont material identifiers. These are material routes, not automatic substitutes.

Keep the source conditions with the number

Process Dk, design Dk and construction-specific values answer different questions. Do not rank measurements taken at different frequencies or by different methods as if they were identical. Missing thickness, foil or bonding information remains an open decision.

References checked 17 October 2026. Typical supplier values are not finished-board acceptance limits or stock statements. Rogers catalogue materials and thicknesses can be sourced; confirm foil combinations and the order schedule. Other sources require project-specific procurement confirmation. Read the high-frequency material purchasing checklist for the full release specification.

Use an application question to guide the next calculation

Three engineering examples you can reproduce

Calculated scenarios and review exercises · not measured customer projects

5.8 GHz patch antenna: compare a design starting point

Use Dk 3.66 and a local dielectric height of 0.254 mm in RF geometry, then set 5.8 GHz in Application checks. The patch tool returns initial rectangular dimensions. Change one input to see its effect; feed position, finite ground, housing and the radiation pattern still need simulation and prototype tuning.

77 GHz radar feed: translate phase budget into a length allowance

With an explicitly assumed effective permittivity of 2.8, compare a 0.05 mm route difference against a 5° phase allowance. The phase worksheet handles electrical length only; it does not validate laminate loss, dispersion or a 77 GHz launch.

RF power amplifier: separate efficiency from the thermal problem

Enter 40 W DC input, 1 W RF input and 20 W RF output. Device power balance gives 21 W dissipation, 50% drain efficiency and 47.5% PAE. A thermal solution then needs package, interface, board and cooling boundary conditions; material thermal conductivity alone cannot predict junction temperature.

From a proposed RF stack to an inspectable board

Review Rogers mixed-stack planning for that material route, or multilayer PCB construction for the broader build. The PCB manufacturing workflow connects the released drawing to fabrication scope.

Electrical continuity is not RF acceptance

RF tests and fixtures require project-specific agreement. Request relevant quality records and review manufacturing equipment against the proposed work. No unprovided customer reports or measured performance are implied by the example tools.

RF PCB design and purchasing questions

Model references and a useful next step

Microstrip and grounded CPW use documented quasi-static approximations with geometry guards. Symmetric stripline is a zero-thickness reference. Finite grounds, frequency dispersion, roughness, masks, connectors and transitions need an appropriate field solver. The patch model provides starting dimensions; it does not predict measured gain or bandwidth.

• Qucs microstrip model reference
• Qucs coplanar-waveguide model reference
• TI RF PCB Simulation Cookbook

For a deeper loss and phase review, use high-frequency PCB design guidance. For populated RF boards, define the assembly and component-sourcing scope.

Send the requirements with the files

Include fabrication and drill files, board revision, quantity, material/foil/stackup, impedances, mask/finish, RF acceptance scope and requested delivery. Early-stage enquiries can identify open decisions instead of guessing missing requirements.