报 告 人：范海军博士, Assistant Professor, Heriot-Watt University, U.K.

报告时间：2023年7月19日（周三）14:30-15:30

报告地点：北京航空航天大学沙河校区主楼A612

摘要：As one of the essential components in modern wireless communication systems, microwave switches are utilized to switch the communication channel and control the signal pathway. Due to the insufficient selectivity of the switch, a filter is required in front of it to pass through the useful signal and suppress the interference. In recent years, the co-design of switches and filters has attracted much more attention compared with conventional independent components since the filtering switch structure has the advantages of improved ON state selectivity and high OFF state suppression. It is noted that most filtering switches integrated with FETs and p-i-n diodes are analyzed and designed by the coupled resonator theory, where the coupling matrix synthesis method is employed. It is challenging to design a wideband filtering switch using the coupling matrix synthesis method due to its narrowband nature. In this presentation, a direct synthesis method for the design of a wideband filtering switch will be introduced. A wideband filtering switch with N transmission zeros (TZs) is attained by embedding a p-i-n diode into each resonator and incorporating the p-i-n diode parasitic parameters into the wideband filter synthesis. High isolation within the switch stopband in the OFF state can be achieved by arranging the N TZs in the OFF state properly when converting the lumped circuit model into a distributed circuit model.

报告人简介：

Dr Haijun Fan received the bachelor’s degree in applied physics from the University of Electronic Science and Technology of China, Chengdu, China, in 2009, the master’s degree in electromagnetic and microwave technology and Ph.D. degree in electronic science and technology from Shanghai Jiao Tong University, Shanghai, China, in 2011 and 2016, respectively.

Dr. Fan is an Assistant Professor with the Institute of Sensors, Signals and Systems, Heriot-Watt University, Edinburgh, U.K. His current research interest includes MMIC power amplifier, integrated antenna array, and filter synthesis. In 2020, he was a Senior Power Amplifier Design Engineer with Ampleon, Nijmegen, The Netherlands. From 2018-2019, he was a Research Associate with Institute of Sensors, Signals and Systems, Heriot-Watt University, Edinburgh, U.K. He was a Post-Doctoral Fellow with the Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China, from 2016-2017. Dr. Fan was a recipient of the Outstanding Doctoral Dissertation Award of China Institute of Communications in 2017.