Cardiff School of Engineering – PhD Studentship
Supervisors Professor Paul Tasker, Dr Jonny Lees
Programme of Study PhD in Engineering
Project title RF power Amplifiers based upon Silcone-Germanium (SiGe) BiCMOS Technology
Start date 1st October 2011
Duration 3 years
Source of funding EPSRC and SiGe Semiconductor (Europe) Limited
The student shall explore and develop the application of RF Waveform engineering
concepts on the design and implementation of advanced RF power amplifiers based
upon Silicon-Germanium (SiGe) BiCMOS technology.
The proposed research shall apply the methods and concepts of RF waveform
engineering within the context of advanced SiGe BiCMOS power amplifiers (PAs).
While intended primarily for applications in consumer electronics, PAs based on
SiGe technology face increasing pressure to achieve higher output power and
linearity specifications that enable higher date rate systems including emerging
standards such as IEEE 802.11ac (utilizing channels as wide as 160MHz in the 5HHz
band and 256 QAM).
It is widely appreciated that PAs based on SiGe technology fulfil many of the cost
and mass production requirements inherent to consumer electronics, however
SiGe PAs have historically suffered from lower power efficiency and linearity as
compared to PAs fabricated upon more exotic semi conductor materials such as
It is a key thrust of this research to develop innovative approaches to the design
and circuit topology of SiGe-based PAs that close the gap in performance whilst
preserving the mass production and cost benefits of this fundamental radio
A key advantage of PAs using SiGe BiCMOS is the availability of the technology
elements needed for integrated memory and control loops which enables one to
statically (one-time) or dynamically adjust PA circuit performance. Whilst common
among many other types of silicon-based semi conductor devices, this concept is
relatively new to power amplifiers. The combination of this facility – inherent to
SiGe BiCMOS technology, and RF waveform engineering methods and concepts
promises to provide a fertile ground for innovations in power amplifiers which will
serve to improve amplifier efficiency and linearity.
Number of awards 1
For Home and EU students, the studentship will cover Home tuition fees at the
Amount of funding
Home fee rate and a tax free annual stipend (£13,590 in 2010-11).
The studentship is open to: UK students; EU students who have been resident in
Eligibility the UK for three years at the course start date; other candidates who can
demonstrate a connection to the UK, usually through residency. Other EU
applications may be eligible for a fees-only award.
Applicants should hold or expect to gain an undergraduate degree in a relevant
Academic criteria discipline (2.1 or 1st class honours) and/or an appropriate Masters level
Professor Paul Tasker, Tasker@cardiff.ac.uk / tel: 029 2087 4423
Contact for further
Dr Jonny Lees, LeesJ2@cardiff.ac.uk / tel: 029 2087 5938
Applications can be made online at www.cardiff.ac.uk.
How to apply
PLEASE ENSURE YOU QUOTE THE STUDENTSHIP REFERENCE ABOVE ON YOUR
APPLICATION. (For online applications, please put reference in the “Prospective
Deadline for applications Until position is filled