ASSOC. PROF. DR. NORHUDAH SEMAN
Norhudah Seman received the B. Eng. in Electrical Engineering (Telecommunications) degree from the Universiti Teknologi Malaysia, Johor, Malaysia, in 2003 and M. Eng. degree in RF/Microwave Communications from The University of Queensland, Brisbane, St. Lucia, Qld., Australia, in 2005. In September 2009, she completed her Ph.D. degree at The University of Queensland. In 2003, she was an Engineer with Motorola Technology, Penang, Malaysia, where she was involved with the RF and microwave components design and testing. Currently, she is an Associate Professor in Wireless Communication Centre (WCC), Universiti Teknologi Malaysia. Her research interests concern the design of microwave circuits for biomedical and industrial applications, specific absorption rate (SAR), UWB technologies, and mobile communications.
Title: Quadrature Phase Shift Keying (QPSK) Modulator Design using Multi-Port Network in Multilayer Microstrip – Slot Technology
The design of the quadrature phase shift keying (QPSK) modulator by using a multi-port network is proposed for the use in wireless communication applications. The multi-port network is in the form of multilayer microstrip-slot technology. This multi-port network is composed of three 3-dB rectangular-shaped directional couplers with virtual stubs and an equal power division divider with in-phase characteristic. The design is performed by applying a full-wave electromagnetic simulation software, CST Microwave Studio (CST MWS). Keysight’s Advanced Design System (ADS) is applied in analyzing and evaluating the QPSK constellation of the proposed modulator. This comparatively small size of proposed design has been fabricated, and its wideband performance of 2 to 6 GHz is verified.