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西交利物浦大学三校联合培养博士项目招生/Arjun Kumar老师课题组
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为培养具备全球领导力、跨学科创新能力和国际科研协作水平的复合型研究人才，西交利物浦大学（简称“西浦”）充分发挥国际化办学特色，联合西安交通大学（简称“西交大”）与英国利物浦大学（简称“利物浦大学”）依托三校长期建立的战略合作优势，整合顶尖科研资源联合启动三校博士培养合作项目。 项目课题: Design of Bi6Ti5WO22-based series of solid solutions or composite dielectric tunable ceramics and related tunable devices. 基于 Bi₆Ti₅WO₂₂ 的系列固溶体或复合介电可调陶瓷及相关可调器件的设计 项目编号: SFXJTU2527 三校导师简介: Dr. Arjun Kumar/XJTLU 西交利物浦大学 Dr. Arjun Kumar is an Assistant Professor in the School of CHIPS at Xi’an Jiaotong-Liverpool University. He received his PhD in RF and Microwave Engineering from IIT Roorkee and has research/industry experience at Korea University, Intel Guadalajara Design Centre, University of Twente, and Bennett University. His research focuses on RF engineering, antennas, 5G/6G, RFID, RF sensors, metamaterials/metasurfaces, millimetre-wave antennas, waveguide technologies, and RF chip components. Arjun Kumar 博士现任西交利物浦大学 CHIPS 学院助理教授。他获印度理工学院鲁尔基分校（IIT Roorkee）射频与微波工程博士学位，并曾在韩国高丽大学、Intel 瓜达拉哈拉设计中心、荷兰特文特大学及Bennett University从事科研和产业研发工作。其主要研究方向包括射频工程、天线、5G/6G、RFID、射频传感器、超材料/超表面、毫米波天线、波导技术及射频芯片元件。 Dr. Jiafeng Zhou – University of Liverpool 利物浦大学 Dr. Jiafeng Zhou is a Senior Lecturer in the Department of Electrical Engineering and Electronics at the University of Liverpool. He holds a BSc in Radio Physics from Nanjing University and a PhD from the University of Birmingham. His research covers microwave power amplifiers, RF/microwave filters, electromagnetic compatibility, frequency-selective surfaces, energy harvesting, metasurfaces, and wireless power transfer. Jiafeng Zhou 博士现任利物浦大学电气工程与电子学系高级讲师（Senior Lecturer）。他本科毕业于南京大学无线电物理专业，并获伯明翰大学博士学位。其主要研究方向包括微波功率放大器、射频/微波滤波器、电磁兼容、频率选择表面、能量收集、超材料/超表面以及无线能量传输等。 Prof. Di Zhou/Xi'an Jiaotong University (XJTU) 西安交通大学 Prof. Di Zhou is a Professor and doctoral supervisor in the School of Electronic Science and Engineering at XJTU. He received his PhD in Electronic Science and Technology from XJTU in 2009. His research focuses on functional dielectric ceramics, microwave dielectric materials, LTCC technology, multilayer ceramic capacitors, dielectric energy-storage materials, microwave devices, and tunable dielectric ceramics. He has published extensively in leading international journals and leads major national and industry collaborative research projects. Di Zhou 教授现任西安交通大学电子科学与工程学院教授、博士生导师。2009年获西安交通大学电子科学与技术专业博士学位。其主要研究方向包括功能介电陶瓷、微波介电材料、低温共烧陶瓷（LTCC）技术、多层陶瓷电容器、介电储能材料、微波器件以及可调介电陶瓷。近年来，教授在国际高水平期刊发表了大量研究成果，并主持和参与多项国家级及产学研合作科研项目。 Dr. Abhishek Kandwal – XJTLU 西交利物浦大学 Dr. Abhishek Kandwal is an Associate Professor in the School of CHIPS at Xi’an Jiaotong-Liverpool University and an Honorary Associate at the University of Liverpool, UK. He received his PhD in Physics (Electromagnetic Waves) from Jaypee University of Information Technology and has over 14 years of research and teaching experience across leading universities and research organisations, including SIAT, Chinese Academy of Sciences, Southern University of Science and Technology, and INTI International University. His research focuses on RF sensing for healthcare and biomedical applications, advanced antennas, leaky-wave and surface-wave antennas, RF imaging, on-chip antennas and devices, electromagnetic wave sensing, and nanotechnology. Abhishek Kandwal 博士现任西交利物浦大学芯片学院（School of CHIPS）副教授，同时担任英国利物浦大学荣誉副研究员。他于 Jaypee University of Information Technology 获得物理学博士学位，具有超过14年的科研与教学经验，曾在中国科学院深圳先进技术研究院（SIAT）、南方科技大学以及 INTI International University 等高校和科研机构开展研究与教学工作。他的研究方向主要包括面向医疗健康与生物医学应用的射频传感技术、先进天线、漏波天线与表面波天线、射频成像、片上天线与器件、电磁波传感以及纳米技术等。 项目简介: This project aims to develop high-performance Bi₆Ti₅WO₂₂ (BTWO)-based tunable dielectric ceramics for next-generation microwave phase shifters and phased-array radar systems. Conventional tunable materials such as barium strontium titanate (BST) often require high driving electric fields and suffer from relatively high dielectric losses, limiting their practical integration. BTWO offers attractive high tunability and low dielectric loss; however, its high dielectric constant and insufficiently understood microwave response present challenges for device integration. The research will develop BTWO-based solid solutions and composite ceramics by combining BTWO with low-permittivity, low-loss microwave dielectric materials such as MgTiO₃ and ZnNb₂O₆. Controlled doping and optimized synthesis, sintering, and forming processes will be employed to tailor crystal structure, microstructure, dielectric properties, and relaxor behavior. Advanced characterization using XRD, SEM/TEM, EDS, Raman/FTIR, impedance analysis, ferroelectric measurements, and microwave characterization will establish the relationships between structure and tunability. The project will further employ effective-medium/phase-field modeling and finite-element simulations to predict material and device performance. Optimized ceramics will be incorporated into prototype microwave components, such as phase shifters and tunable antennas, for experimental validation. The ultimate goal is to achieve dielectric constant below 100, tunability above 30–60%, dielectric loss below 0.01, and operation above 1 GHz under moderate electric fields, providing a practical materials platform for compact, efficient, and low-loss tunable microwave devices. 本项目旨在开发高性能 Bi₆Ti₅WO₂₂（BTWO）基可调介电陶瓷，用于新一代微波移相器和相控阵雷达系统。传统可调介电材料，如钛酸锶钡（BST），通常需要较高的驱动电场，并存在介电损耗相对较高的问题，从而限制了其在实际微波器件中的集成应用。BTWO具有高介电可调率和低介电损耗等优势，但其较高的介电常数以及微波频段介电响应机制尚未得到充分研究，这给器件集成带来了挑战。 本研究将通过将BTWO与低介电常数、低损耗的微波介电材料（如 MgTiO₃ 和 ZnNb₂O₆）相结合，开发BTWO基固溶体及复合介电陶瓷。通过精确掺杂以及优化材料合成、烧结和成型工艺，调控材料的晶体结构、微观结构、介电性能及弛豫铁电行为。同时，采用X射线衍射（XRD）、扫描/透射电子显微镜（SEM/TEM）、能谱分析（EDS）、拉曼/傅里叶变换红外光谱（Raman/FTIR）、阻抗分析、铁电性能测试及微波性能表征等先进技术，建立材料结构与介电可调性能之间的关系。 此外，本项目将结合有效介质理论/相场建模和有限元仿真（FEM），预测材料及器件的性能。最终，将优化后的陶瓷材料应用于微波移相器、可调谐天线等原型器件，并进行实验验证。 项目最终目标是获得介电常数低于100、介电可调率达到30–60%以上、介电损耗低于0.01，并能够在适中的外加电场下实现1 GHz以上频率工作的高性能可调介电材料，为小型化、高效率、低损耗可调微波器件提供具有实际应用潜力的材料平台。 对项目候选人的其他学术背景及技能要求： Candidates should have a background in materials science, electronic/electrical engineering, physics, or a related field. Experience in dielectric/ferroelectric ceramics, microwave materials, materials synthesis, XRD/SEM characterization, electromagnetic simulation (HFSS/CST), data analysis, and scientific programming is desirable. Strong analytical, experimental, and communication skills are expected. 候选人应具有材料科学、电子/电气工程、物理学或相关专业背景。具备介电/铁电陶瓷、微波材料、材料制备、XRD/SEM表征、电磁仿真（HFSS/CST）、数据分析及科学编程经验者优先。应具备较强的分析能力、实验能力和沟通能力。 有意者请将个人简历及其他有助于申请的材料发送至Arjun.Kumar@xjtlu.edu.cn |
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