Common substrate properties
Description: Table of common microstrip substrate materials and their electrical characeristics.
Keywords: dielectric, dielectric constant permittivity, relative dielectric constant, relative permittivity

Popular Substrate Materials
Substrate Material | Relative Permittivity Er | Loss Tangent tand
Alumina 99.5% Pure | 9.8 | 0.0001
FR4 Fiberglass | 4.5-4.9 | 0.01
GaAs | 12.9 | 0.002
PTFE | 2.1 | 0.0003
Quartz | 3.78 | 0.0001

Please note that this table is provided for reference only. You should contact your substrate vendor for detailed electrical characteristics. Your vendor should be able to also provide tolerances on the dielectric constant, loss tangent, and thickness.

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