Ceramic resonators substrates and filters

Basic material characteristics

Ceramic materials with high permittivity, high Q and very good temperature stability are useful for TEM mode coaxial resonators, TE mode dielectric resonators, RF filters, special capacitors and dielectric substrates for microwave circuits. Frequency range: from 0.3 GHz to 24 GHz.

Symbol (Unit) Material
E-37 E-20 E-11 E-11C
 Products   Coaxial, Cylinders, Substrates Coaxial, Substrates, Cylinders Substrates, Supports Substrates, Coaxial, Supports
 Permittivity εr 36.5 ... 38 19.5 ... 21 11.5 0.5 11.2 0.5
 Unloaded Q-factor Q0 (at 10 GHz) 4 500 4 500 5 000 4 500
 Temperature
 coefficient (selectable)
TCF (ppm K-1) -6/-3/0/3/6/9 1 -6/-3/0/3/6/9 2 - 40 5 0, +5, +10 5
 Density ρ (g cm-3) 5.1 3.7 3.5 3.5
 Insulation resistivity r (Ω cm) 1013 1013 1013 1013
 Thermal expansion TCL (ppm K-1) 7.5 8 8.5 8.7
 Thermal conductivity λ (W m-1 K-1) 2.5 7 3 3
 Color   greygreen beige creamwhite creamwhite