PREDAVANJE: Common-mode electromagnetic noise migration for high speed electronics

17. rujna 2018.

od 12:00 do 14:00

Vijećnica fakulteta

ABSTRACT:

Due to the special negative electromagnetic properties, metamaterial has gained wide attention and also been increasingly applied in electromagnetic compatibility (EMC). In this talk, the metamaterial associated EMC design has been addressed through inhibiting common-mode electromagnetic noise in high speed electronic circuits. By using specific slots etched in ground metallic plane which forms a defected ground structure (DGS), a wideband and compact microstrip filter is developed to mitigate the common-mode noise. The effect of the DGS on the electromagnetic characteristics of the microstrip lines is examined. It is proved that the common-mode noise can be reduced at least by 15 dB at operational frequency with a broad bandwidth, whilst the differential signal is unaffected. An equivalent circuit model is also built based on the simulation result to understand the filtering behavior. The filter size is comparably small to the operational wavelength. A substrate-filled metallic cavity beneath a conventional DGS is proposed for the application in multiplayer printed circuit boards. Behaving as electromagnetic shielding and absorption for the cavity, the back-radiation from the DGS is effectively reduced, while the filtering characteristic of the DGS is retained in the interested frequency band. A robust design optimization technique is subsequently employed to realize optimal filter with robustness property. The DGS based filtering technique can effectively tackle the EMI issue by increasing microstrip line insertion loss. It can be used extensively in microwave filter design.

Biography

Dr. Richard Xian-Ke GAO received his Ph. D. degree from National University of Singapore. He worked at different universities, research institutes and industrial companies over 30 years. He is currently working as the group manager and senior scientist with the A*STAR Institute of High Performance Computing in Singapore. He has published over 70 papers in the referred international journals and conferences, and led a lot of research & industrial projects and new products development. Dr. Gao is senior member of IEEE and member of URSI. He serves as an associate editor (guest editor) of IEEE Transactions on Electromagnetic Compatibility. He is the TPC chairs of 2020 Asia-Pacific Symposium on Electromagnetic Compatibility, 2019 Asia-Pacific Microwave Conference, and 2018 Joint IEEE EMC & APEMC Symposium, respectively. He serves on executive positions of various international conferences and committees. He was the chair of IEEE EMC Singapore Chapter in 2010-2011 and 2016-2017. He serves as a reviewer of referred international journals and conferences. Dr. Gao received various awards. He is the recipient of the Best Paper award at APEMC in 2016. His main research interests include electromagnetic compatibility, RF, metamaterial, microwave, antenna and RFID, wireless energy, smart grid, bio-electromagnetics, robust design and optimization technologies, and CAD/CAE/CAM.