报告题目：High power terahertz sources and broadband amplifiers towards terahertz range
报 告 人：Wenlong He, Senior Research Fellow
University of Strathclyde, UK
报告时间：2018年6月13日 下午15:00—17:00
报告地点：清华大学刘卿楼402
主 持 人：赵自然  研究员
报告摘要：
The demonstrations of high power (kilowatts), compact millimetre wave sources using both pencil and sheet-shaped electron beams generated from hollow cathodes, based on extended interaction oscillators and backward wave oscillators in W- and G-band are presented firstly. Afterwards gyrotron travelling wave amplifiers (Gyro-TWA), having the capability of both high power and broadband amplification at high frequencies (up to the terahertz range) are discussed. Experimental results at 90-100 GHz frequency demonstrating unprecedented frequency bandwidth, due to ideal dispersion properties of helically corrugated interaction regions, are presented and followed by future work in the higher terahertz range. These devices have many applications including electron spin resonance, fast data-rate wireless communications, high resolution RADAR and remote sensing.

报告人简介：
Wenlong He received the Ph.D. degree in high power microwave from the University of Strathclyde in 1995. He is currently an Advanced Fellow with the Scottish Universities Physics Alliance. Dr He leads a world-leading research team carrying out cutting-edge research on high power mm-wave and terahertz generation and amplification. Dr He has authored over 100 refereed journal papers including 7 published in Physical Review Letters. He is an executive member of UK IET RF & Microwave Committee coordinating the "mm-wave for 5G" program. Dr He is also representing the University of Strathclyde, an invited member of UK 5G Innovation Centre. Dr He leads an international research MARTHA (the MAgnetic Resonance enabled by TeraHertz Amplifiers) consortium.