Name Assoc. Professor Dr. Badrul Hisham bin Ahmad
Designation Assoc. Professor
Email address firstname.lastname@example.org
Qualification(s) PhD / Microwave Engineering / University of Leeds, UK
M.Sc / Electrical, Electronics & System Engineering / UKM
B.Eng / Electronics / Communication Engineering / University of Leeds, UK
Research area(s) Microwave Filters, Dielectric Resonators, Antennas – Swtiches – DGS
AN INVESTIGATION OF SWITCHABLE MATCHED BANDSTOP TO BANDPASS FILTER BASED ON LOSSY RESONATOR
Filters are the basic component of transceivers and receivers in the RF front-end communication system, either as band reject or band select units. This research is about an investigation of the new switchable filter which is can switch from matched bandstop to bandpass filter based on lossy resonator, where the lossy resonator topology can be used to partially compensate for the loss. The aim of this research work is to investigate the switchable matched bandstop to the bandpass filter response using lossy resonator based on EM modeling. This filter will be realized in parallel-coupled L-shape resonator. A PIN and varactor diodes will be used to make the filter switchable. This switchable filter provides two modes of operation; matched bandstop and bandpass response. The operating frequency is 2.4 GHz. The theoretical analysis together with EM modeling of the new switchable matched bandstop to bandpass response is presented in this paper.
Badrul Hisham Ahmad graduated with honours degree in Electronic and Communication Engineering from the University of Leeds, UK in 1998. He received the M.Sc. degree from University Kebangsaan Malaysia in 2003 and Ph.D. degree from Leeds University, United Kingdom for a thesis on the design and development of SIW filters in 2008. He is a lecturer at Universiti Teknikal Malaysia Melaka since 2003. He is also an active researcher with a good track record with a number of research projects in RF and Microwave Engineering.