AD materials provide PTFE-based options for antenna and other RF boards. Family selection should begin with antenna geometry, feed loss and the completed assembly's passive-intermodulation requirement.
Choose a geometry that can be made
The dielectric constant influences radiator size, feed width and spacing. Use the individual AD250C, AD255C, AD300D and AD350A records to identify suitable thickness and electrical-property conditions. A broader panel may need a different handling or support strategy from a compact RF module.
PIM belongs to the assembled circuit
A material test fixture can reveal a promising construction, but connectors, joints, contamination, mechanical stress and current concentration remain part of the antenna. When a PIM result is quoted, retain tone frequencies, power, laminate thickness and measurement direction. A number without this context cannot establish whether your finished assembly meets its receiver-interference budget.
Keep a controlled comparison
Prototype candidates using comparable antenna geometry and document any redesign needed to reach the same impedance or resonance. Measure radiation behavior, feed insertion loss and repeatability after mounting. The low-PIM guide helps organize the test plan. If copper-interface performance becomes decisive, investigate the corresponding IM variants as distinct constructions.
References in this family
Specify antenna geometry, foil and PIM test conditions together, then validate the mounted assembly.