针对不同形状和尺寸陶瓷材料的双频自适应微波介电传感器  

A Dual-band Sample Adaptive Dielectric Sensor for Ceramics of Versatile Profile and Size in Microwave Range

作　　者：王宸 刘小明 刘志甫[2] 张丹 WANG Chen;Liu Xiaoming;LIU Zhifu;ZHANG Dan(School of Physics and Electronic Information,Anhui Normal University,Wuhu 241002,Anhui,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China)

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241002 [2]中国科学院上海硅酸盐研究所,上海201899

出　　处：《硅酸盐学报》2023年第4期842-850,共9页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(61871003);安徽省协同创新项目(GXXT-2021-027);安徽省教育厅自然科学研究项目(KJ2021A0101)。

摘　　要：陶瓷材料作为在微波系统开发中的重要材料,通常被加工成多种形状,例如以厘米级别为尺寸的圆柱形和立方体。因此,对此类样品进行介电常数的测量是一项具有挑战性的工作。针对该难点,研制了1种基于互补开口环谐振器的双波段介电传感器,并提出了一种表征不同形状和尺寸样品的介电测量方法。该传感器有2个工作频段,2个频段均为无线通信频带。在每个频段范围内,进行了数值模拟并建立了每个样本的拟合模型,对传感器进行加工并实际测量以验证数值模型和测量精度,对比参考值,测量精度高达3.5%。结果表明:提出的传感器及测量方法能够针对不同形状和尺寸的合成陶瓷进行精确的介电测量,表明该传感器具有良好的样品自适应性。该传感器的新颖之处在于它能够在不改变传感器和被测物结构的情况下测量厘米级别的各种样品的介电常数。此外,双频测量也是该传感器的优势,2个频段之间的差异小于5%。Ceramic materials for microwave systems often show versatile profiles,such as cylindrical and cubic shapes with centimeter sizes.The measurement of such samples thus becomes a challenge.In this paper,a dual-band dielectric sensor based on the complementary split-ring resonators was developed,and a measurement method to characterize the samples with different shapes and sizes was proposed.The resonator creates two operation frequency ranges,which are in wireless communication bands.In each range,numerical simulation was conducted to build the fitting models for each sample.The measurement was conducted to verify the numerical models and the measurement accuracy.The results indicate that the measured accuracy can be as high as 3.5%.Such a measurement method in association with the proposed sensor is competent for dielectric measurement for ceramic of versatile profile,indicating a sample adaptive capability.The novelty of this work lies in its capability of measurement of various samples in a centimeter scale without modifying either the sensor or the material under test(MUT).In addition,a dual-band operation is also a feature of this work,and the discrepancy between the twobands islessthan 5%.

关 键 词：微波陶瓷 介电常数 双频带 谐振频率 互补开口环谐振器 

分 类 号：TQ172.75[化学工程—水泥工业]