Since Heinrich Hertz developed the first antenna in 1887 to demonstrate the existence of radio waves, the antenna has become the linchpin in countless wireless systems and devices. With the increasing demand for faster wireless connectivity, rising adoption of smartphones for consumer electronics, and accelerating digitization, stringent requirements, such as wide bandwidth and compact size, are imposed on antenna technology. The magneto-electric (ME) dipole is proposed to tackle the new challenges. It has been developed for mobile communications, global navigation receivers, radars, sensors, medical imaging systems and wireless power transfer systems. Compared with conventional antennas such as dipoles, slots and microstrip antennas, the ME dipoles have many distinguished features including wide bandwidth, low cross-polarization, low back radiation and stable gain and beamwidth over the operating frequencies. An overview of the theory and applications of the ME dipoles will be presented.
Professor Luk is specialized in Applied Electromagnetics and Microwave Engineering. He received his Bachelor’s and Ph.D. degrees from HKU-EE and worked at CUHK-EE for 4 years. He has held his Chair Professorship at CityU-EE since 1999. He is currently Head of the Department of Electrical Engineering.
He is a Fellow of the Royal Academy of Engineering and a Fellow of the Hong Kong Academy of Engineering Sciences. He is also a Fellow of IEEE, HKIE, CIE, IET, and the Electromagnetic Academy. He received the 2001 Croucher Award, the 2011 State Technological Invention Award, the 2017 IEEE APS John Kraus Antenna Award, 2019 Ho Leung Ho Lee Science and Technology Prize and the 2022 Guanghua Engineering Prize.
Clean water and clean air are vital for public health. This project focuses on developing high-efficiency and environmentally sustainable filters for removing harmful air/water pollutants. The team has developed novel architectures and functionalities for the filters to achieve high permeance, high removal efficiency, and excellent reusability.
