Skip to content


Dielectric resonators are a type of passive electronic component that uses the principle of electromagnetic resonance to store energy in a dielectric material. They are typically cylindrical or rectangular-shaped and are made of a dielectric material such as ceramic or barium titanate.

Dielectric resonators work by creating a standing wave of electromagnetic energy inside the resonator. When an RF or microwave signal is applied to the resonator, it causes the electrons in the dielectric material to oscillate at a specific frequency, creating a standing wave of electromagnetic energy. The frequency at which the electrons oscillate is known as the resonant frequency of the resonator.

Dielectric resonators are used in a variety of RF and microwave applications, such as:

  • Filtering: Dielectric resonators can be used to filter out unwanted signals by selecting only a specific frequency or range of frequencies.
  • Amplification: Dielectric resonators can be used to amplify signals by increasing the amplitude of the resonant frequency.
  • Oscillation: Dielectric resonators can be used to generate signals by forcing the resonator to oscillate at a specific frequency.
  • Bandpass Filters: Dielectric resonators can be used to create bandpass filters, which allow a specific range of frequencies to pass through while rejecting other frequencies.

Exxelia, a source of high Q factor dielectric resonators for critical applications, can now produce larger batches of its E7000 series, for increased cost-effectiveness. Designed for high-end filters where Q factor is critical, especially in space or military applications, the E7000 series features tremendous properties.

Dielectric resonators are designed to replace resonant cavities in microwave functions such as filters and oscillators. Exxelia with the support of ESA and CNES developed the E7000 series that provides a narrow bandwidth with smaller size. E7000 is Ba-Mg-Ta materials based that combines an ultra-high Q factor and the possibility to get all the temperature coefficients upon request. E7000 features the high-performance requested for space use in the frequency range from 5 to 32 GHz, and guarantees up to Qxf > 250 000 at 10GHZ.

Exxelia makes its own raw materials and can provide larger batches (up to 20Kg of powder) of its E7000 series while keeping the exact same product properties, resulting in opportunities for cost-effective volume fabrication.
Typical applications for the E7000 series: Satellite multiplexing filter devices, radio links for communication systems (LMDS), military radars. Contact for more information


Back To Top