Improved tri-layer microwave dielectric ceramic for 5 G applications

Tri-layer ZnTi0.97Ge0.03Nb2O8-TiO2-ZnTi0.97Ge0.03Nb2O8 ceramics with different mass fractions of TiO2 were initially prepared. The advantages of the multilayer architecture were fully demonstrated, and the microwave dielectric properties were controlled by the components of each dielectric layer. In contrast to the random distribution-type ZnTi0.97Ge0.03Nb2O8-TiO2, this trTlayer architecture could achieve a nearly 50 % increase in the Qxf value. Meanwhile, based on the parallel distribution mode, a 10 % increase in the dielectric constant could be obtained due to the existence of Zn2GeO4. After sintering at 1120 degrees C for 6 h, ZnTi0.92Ge0.03Nb2O8-TiO2-ZnTi0.92Ge0.03Nb2O8 trTlayered ceramics exhibited excellent dielectric properties (epsilon(r) = 42.1, Qxf= 51,477 GHz and tau(f)= +1.9 ppm/degrees C) with 0.04 wt% TiO2, and the cooperative optimization of microwave dielectric properties was achieved. This research provides a direction for the preparation of high-performance microwave dielectric resonators for application in 5 G wireless communication technologies.

Automated summary

The multilayer architecture of ZnTi0.97Ge0.03Nb2O8-TiO2-ZnTi0.97Ge0.03Nb2O8 ceramics demonstrates advantages and control over microwave dielectric properties. Through the interaction of components in the tri-layer structure, a cooperative optimization of microwave dielectric properties is achieved.