High-k and Low-Loss Dielectric Materials for Resonator Systems

Dear Colleagues,

Due to their ability to efficiently concentrate electromagnetic energy, high-permittivity and low loss dielectric materials have found their durable application as resonators. Particular interest in them was caused by the rapid development of wireless telecommunication systems in the 1980s–1990s. Since the technologies for growing single crystals and obtaining high-quality ceramics were quite well developed by that time, crystal and even more ceramic dielectric resonators (DRs) began to be widely used both in mobile phones and at base stations. In addition, they have been used in space and defense communications systems. With the further miniaturization and active development of thin-film technologies in the early 2000s, thin-film resonators have since partially replaced bulk ceramic, e.g., in smartphones. Still suitable for 5G resonators, ceramic resonator materials with their stability and reliability due to well-developed technology and thoroughly studied properties have recently found other fields of application, for example, in magnetic resonance spectroscopy, in particular in medical MRI systems for targeted clinical MR examination, in portable EPR devices for rapid analysis of air pollution, food, and oil products, as well as in THz gyrotrons as high-Q Bragg resonators, etc. In addition, active research is underway on the possibilities of using all-dielectric metamaterials based on DR arrays.

The purpose of this Special Issue is to gather in one place and demonstrate both actively developing and emerging areas of application of dielectric resonator materials. Up to now, most of these materials are ternary oxides, mainly titanates or tantalates. With this Special Issue, we hope to draw attention and inspire researchers to use and develop new classes of dielectric materials for resonator systems.

Dr. Iryna Golovina
Guest Editor

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• high-k ceramics
• dielectric resonator
• dielectric resonator antennas
• perovskite oxide
• all-dielectric metamaterial
• microwave dielectric material
• 5G dielectric filter