Rogers TMM 13i is a ceramic hydrocarbon thermoset circuit material in the TMM family. It is used as a substrate for microwave circuitry, including microstrip and stripline structures. The product is not a loudspeaker, and its designation does not identify an audio driver or enclosure.
TMM 13i offers a relatively high dielectric constant within this laminate family. That can support smaller RF structures, but the benefit must be evaluated alongside conductor geometry, coupling, loss and manufacturing tolerances. High dielectric constant alone does not establish circuit bandwidth or efficiency.
Rogers publishes separate process and design dielectric values; use the value and test conditions appropriate to the intended calculation. Review material thickness, copper foil and thermal expansion for the proposed assembly. The TMM thermoset construction should not be treated as if it were a PTFE laminate merely because both appear in RF material catalogs. Use the TMM processing guidance and a verified stackup for multilayer or mixed-material construction.
Selection and validation
Before releasing a board, record the exact material designation, dielectric thickness, copper foil, finished stackup and inspection requirements. Have the fabricator review the construction and confirm material availability. Prototype measurements should establish whether the finished circuit meets its electrical and environmental requirements.
Official sources: Rogers TMM 13i product information.
Put this into production
Request a material, stackup and manufacturing review for your RF PCB project.