A novel formula for the quality factor calculation for the multiphase microwave dielectric ceramic mixtures

作者：Chen, Hetuo; Tang, Bin^*; Zhong, Chaowei; Yuan, Ying; Zhang, Shuren

来源：Journal of the European Ceramic Society, 2017, 37(10): 3347-3352.

DOI：10.1016/j.jeurceramsoc.2017.04.006

• Classical dispersion theory
• Maxwell-Wagner formula
• Quality factor

Microwave dielectric ceramics are pillar materials in the microwave applications, for example, resonators. However, because most ceramics possess non-zero temperature coefficients, two or more ceramics, with temperature coefficient of opposite signs, are always mixed as a multiple phase system to obtain a zero temperature coefficient ceramic. While the dielectric constant can be calculated by the Maxwell-Wagner based formula, the quality factor (Q) is usually hard to be precisely calculated by the conventional method. In this paper, basing on the classical dispersion theory, we derive a new formula for the Q calculation for the ceramic mixtures. The deviation between the calculated and reported Q, of several typical ceramic systems, is around +/- 5%, for the example of two phases ceramic mixtures.

• 出版日期2017-8
• 单位电子薄膜与集成器件国家重点实验室; 电子科技大学