Multifunctional Low Loss Ceramic–Polymer Composites for Microwave Applications

Abstract

Abstract This article reviews the state of the art in low loss multifunctional ceramic‐polymer composites for microwave applications. First, the process technology and modeling method for ceramic‐polymer composites are briefly presented. Second, low loss ceramic‐polymer composites with enhanced dielectric behavior are reviewed. Third, flexible dielectric composites are studied by choosing an elastomer with low microwave dielectric loss as matrix and high permittivity microwave ceramics as fillers. Improving the permittivity while retaining the flexibility is achieved by improving the ceramic filler particle's properties, composites structures, and the technology procedures. Microwave composites with high permittivity, low dielectric loss, and certain flexibility are obtained. Fourth, a kind of low loss dielectric‐magnetic composite was developed with the aim to integrate the dielectric properties and magnetic properties. The results show good success in lowering the dielectric loss and extending the cut‐off frequency of the magneto‐dielectric composites. Examples of new applications based on the low loss ceramic‐polymer composites are given and the future trends for development pointed out.