Short Bio:
Qing-Xin Chu, South China University of Technology

Qing-Xin Chu is the professor with the School of Electronic and Information Engineering, South China University of Technology, the vice-chair of China Electronic Institute (CEI) Antenna Society, the vice-chair of CEI Propagation Society, IEEE Fellow and CEI Fellow. He has published two books and more than 600 papers in journals and conferences with over 4000 SCI citations. He has been elected as the highly cited scholar by Elsevier in the field of Electrical and Electronic Engineering since 2013. He has authorized more than 70 invention patents of China. He was the recipient of the Science Awards by CEI in 2018 and 2016, the Science Award by Guangdong Province of China in 2013, the Science Awards by the Education Ministry of China in 2008 and 2002. His current research interests include antennas and RF techniques in 5G communication.

Speech Title: Band-Notched Dual-polarized Electromagnetic Transparent Antennas for Cross-Band Scattering Suppression.

Abstract:
The multi-band aperture-shared antennas including the 5G massive MIMO antennas and the existing 2G/3G/4G antennas with one reflector and one radome are often used in current base stations to save costs. However, a lot of antennas working in different bands in a limited space will suffer serious cross-band scattering interference. Due to its larger size, the antennas operating in the lower-band usually work as a scattering source of the antennas operating in the higher-band, resulting in the distortion of the impedance matching and radiation pattern of the higher-band antenna. In this talk, band-notched method is proposed to realize electromagnetic transparent antennas with broad-band impedance matching and cross-band scattering suppressing for multi-band aperture-shared antennas. The operation mechanism of suppressing the cross-band scattering is first introduced by using a parasitic antenna array composed of two half-wavelength dipole antennas. It tells us that cross-band scattering suppression can be achieved by etching SSRs (split-slot resonators) on the entire radiating arms of a lower-band antenna to realize the notch band in higher band. Then several dual-band and tri-band aperture-shared antennas are proposed including electromagnetic transparent antennas operating in lower band and antennas operating in higher band. The electromagnetic transparent antennas are obtained by etching folded SSRs on the radiating arms of a crossed dipole antenna. The simulation and measurement results demonstrate that the electromagnetic transparent antennas designed by band-notched method can achieve good cross-band scattering suppression and radiation pattern restoration.