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