Dielectric Resonators

Dielectric resonators are ceramic or polymer-based components that are used in microwave and radio frequency applications as resonant cavities for the generation and filtering of electromagnetic signals. They are commonly used as an alternative to metallic cavity resonators due to their high Q-factor, temperature stability, and low losses.

Dielectric resonators are typically made of ceramic materials, such as alumina, titanate, or zirconia, or polymer-based materials, such as PTFE or LCP. They are designed to resonate at a specific frequency when excited by an external electromagnetic field. The resonance frequency is determined by the dimensions and the dielectric properties of the resonator, which have a high permittivity and low loss tangent.

Dielectric resonators are used in a wide range of applications, such as filters, oscillators, and amplifiers, in microwave and radio frequency systems, such as satellite communication, radar, and wireless communication. They offer several advantages over other types of resonators, such as compact size, low cost, and high reliability.

Dielectric resonators come in different shapes and sizes, including cylindrical, rectangular, and spherical, each with different characteristics and performance levels. They can be mounted on a substrate or embedded in a circuit board, depending on the application and the required performance.