About this event

1/f spectrum appears in many places in nature such as river flooding patterns, biological organisms, distribution of starts in galaxies; 
as well as in many human made structures such as music, internet traffic or interstate road traffic. It also appears in electronic
devices used for wireless communication.

The electronic 1/f noise is more prominent than white noise only at very low frequencies; however it gets converted to phase noise
in microwave oscillators and reduces quality of the wireless communication. Physical origins of 1/f noise in microwave transistors
are not yet completely understood and predicting the phase noise correctly in a fully integrated microwave oscillator is not
straightforward. At Macquarie University, in collaboration with Mimix Broadband, we have been researching methods for accurate
measurement and modelling of 1/f noise in microwave transistors, with the aim of accurate prediction of microwave oscillator
phase noise.

In this talk some interesting examples of 1/f noise in nature will be summarised, followed by the 1/f noise measuring and modelling
techniques developed at Macquarie University.

SPEAKER BIOGRAPY
Oya Sevimli is a senior microwave engineer, currently working full time for a PhD degree in Electronic Engineering at Macquarie
University, NSW Australia. She received her B.Sc. and M.Sc. degrees in Electrical and Electronic Engineering from Middle East
Technical University, Turkey, in 1981 and 1985 respectively.

She was a research engineer at CSIRO for 20 years between 1987 and 2008. She was the Science Leader for Millimetre Wave and
Microwave Technologies at CSIRO ICT Centre between 2005 and 2008. Her research at CSIRO included development of novel
integrated circuits at 50 GHz and 100 GHz bands such as InP HEMT oscillators and bidirectional amplifiers, GaAs HEMT low noise
amplifiers, and Schottky diode mixers.

Since 2008, Oya has been a full time PhD student at Macquarie University, conducting research on low‐frequency noise in GaAs
transistors and its conversion into phase noise in microwave oscillators. She is receiving a Macquarie University Research Excellence
Scholarship and an industry top‐up by Mimix Broadband Pty Ltd.

Oya Sevimli has been an IEEE Member since 1989, Senior Member since 2005, and a Student Member since 2009. She was a
member of Editorial Board for IEEE Transactions on Microwave Theory and Techniques and member of Technical Paper Committees
for several international conferences. Oya was a joint recipient of 2002 CSIRO Medal (for Scientific Achievement for Ultra Fast
Integrated Circuits), 2007 CSIRO Chairman’s Medal (for Exceptional Research in Gigabit Wireless Communications), and 2007
National Engineering Excellence Award by Engineers Australia (for Multi Gigabit Millimetre Wave Wireless).

Cost

Free of Charge

Poster

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