Ceramic dielectrics for microwave communication

Abstract

Ceramic microwave dielectrics shows that large progress has been made in the past more than 50 years. A series of ceramic dielectric materials have been developed and commercialized. Some new concepts like ULTCC material and cold sintering process have been developed. These new materials and new process make it possible to promote the application of ceramic dielectrics in more emerging fields. While, although large amount of materials with different element compositions, phase compositions, forms and microstructures have been explored, to develop dielectric materials with low dielectric loss and near -zero temperature coefficient for higher frequency applications is still the main theme of ceramic microwave dielectric study. It is still difficult to establish the composition - structure -property relationship to guide new material design due to the complicity of the impact factors of dielectric performance. But, the huge experimental and theoretical data on microwave dielectric ceramics make it possible for researchers to use the emerging technology like machine learning to explore high-performance new microwave dielectric materials.