Material we used: Ceramic-filled PTFE Composite for Rogers RO3003, It's good at high temperature, operating at 10GHz and temperature changes from -50 degree Celsius to +150 degree Celsius,DK can reach -3ppm/ degree Celsius,The RO3003 amintains a high permittivity frequency stability and can be used in a wide frequecny rang. RO3003 laminates also show a very low DF(0.0013)AT 10GHz.
Rogers RO3003 PCB material specification
Microwave Circuit application
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