Driven by the development demands of 5G/6G communications and high-frequency RF modules, our group focuses on microwave dielectric ceramics and related devices. We have established a complete technical chain covering material system design, ceramic powder preparation, broadband performance characterization, tape casting and co-firing, device design and performance verification. A series of novel microwave dielectric ceramics with dielectric constants ranging from K4 to K65, high quality factor, favorable temperature stability and superior reliability have been developed.
We have systematically conducted researches on solid solution design, ion substitution, composite ceramics, sintering agent regulation and glass-ceramic modification, realizing the synergistic optimization of dielectric constant, dielectric loss and temperature coefficient of resonant frequency. Targeting diverse application scenarios, multiple types of microwave dielectric ceramics have been developed, including materials with low permittivity, low loss and high thermal conductivity, as well as those featuring high permittivity, near-zero temperature drift and excellent thermal stability. We have also explored ceramics with reverse temperature drift and negative thermal expansion, and proposed innovative design strategies for temperature stability compensation and multifunctional ceramics. Combined with broadband dielectric measurement, structural characterization and machine learning-assisted screening, the correlation between composition, structure and performance has been established, and the intrinsic mechanisms linking crystal structure, microstructure and high-frequency dielectric response have been thoroughly revealed.
Based on material research, we further investigate powder synthesis, low-temperature sintering, tape casting, co-firing with metal electrodes and multilayer device integration, with full consideration of reliability indicators such as low water absorption, high mechanical strength, low thermal expansion and high thermal conductivity. To meet the requirements of different frequency bands and devices, we have fabricated various components applicable to Sub-6 GHz, X-band, millimeter-wave and terahertz bands, including C0G-type multilayer ceramic capacitors, dielectric resonators, dielectric resonator antennas, high-frequency filters, laminated filters, LTCC integrated antennas and array antennas for automotive radar.
Publications:
1、Guo-Qiang He, Chao Du, Zhentao Wang, Zhen Fang, Wei Wang, Zhaochen Xi, Chenchen Wu, Shuwei Ma, Moustafa Adel Darwish, Tao Zhou, Diming Xu, Song Xia, Yongzheng Wen, Kar Ban Tan, Di Zhou,* BaSc2O4: A Novel AB₂O₄-Type Low-k Microwave Dielectric Ceramic with Giant Positive τf for 5G/6G Frequency Compensation, Advanced Functional Materials, 2026, accepted, https://doi.org/10.1002/adfm.202528138.
2、Wei Wang, Jian Bao, Changhao Wang, Ziyang Liu, Shuwei Ma, Diming Xu, Biaobing Jin, Zhongqi Shi, Moustafa Adel Darwish, Yawei Chen, Qixin Liang, Meirong Zhang, Di Zhou*, Low-permittivity LiMSiO4 (M = Ga, Sc, Y) Dielectric Ceramic and Microstrip Array Antenna Design for Millimeter-wave Communications, Journal of Materials Science & Technology, 2025, 225, 288–296.
3、Di Zhou*, Ling Zhang, Di-Ming Xu, Feng Qiao, Xiaogang Yao, Huixing Lin, Wenfeng Liu, Li-Xia Pang, Fayaz Hussain, Moustafa Adel Darwish, Tao Zhou, Yawei Chen, Qixin Liang, Meirong Zhang, Ian M. Reaney*, Novel Method to Achieve Temperature Stable Microwave Dielectric Ceramics: A Case in Fergusonite Structured NdNbO4 System, ACS Applied Materials & Interfaces, 2023, 15, 19129–19136.
4、Chao Du, Shaofei Wang, Yongqiang Pang,* Zhongxiang Shen,* Kaida Xu, ZhijiWang, Tao Zhou, Song Xia, Di Zhou,⁎ Radiofrequency Transparent Uniaxial Dual-Polarized Metasurface with Ultrawide Brewster Angle Stability, Laser & Photonics Reviews, 2025, 19, 2500190.
5、Kaiheng Zhang, Di Zhou*, Guodong Cai, Shaofei Wang, Yuanxi Cao, Sen Yan,* A dual-polarized metasurface with angle-selective character in elevation plane and stability in azimuth plane, Optics & Laser Technology, 2026, 200, 115213.