TC laminates combine PTFE, woven fiberglass and thermally conductive ceramic filler. The family is a candidate when a power-carrying RF circuit needs both an electrical model and an explicit heat-removal plan.
Follow the heat path
Identify whether heat must pass through the dielectric, spread along copper, enter plated vias or transfer across an adhesive into a metal base. A laminate conductivity value helps only with the part of that path it describes. If an interface or heatsink dominates the temperature rise, changing the laminate may bring a smaller benefit than the headline material comparison suggests.
Keep the comparison method consistent
TC350, TC350 Plus and TC600 should be compared with thermal direction, temperature and method attached. Read the TC350 comparison before interpreting conductivity ratios. Electrical loss and temperature-dependent matching also remain part of an RF power decision.
Build a useful test vehicle
Model a representative high-current trace and its mounting interface. The one-dimensional thermal tool can estimate a simple dielectric path, but it omits spreading and contact resistance. Measure a prototype under a defined duty cycle, ambient temperature and cooling condition. Record those conditions with gain, efficiency and return loss so thermal improvements do not conceal an electrical regression.
References in this family
Optimize the complete thermal route while verifying the matching circuit at its operating temperature.