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Details of Grant 

EPSRC Reference: EP/N016408/1
Title: Integration of RF Circuits with High Speed GaN Switching on Silicon Substrates
Principal Investigator: Tasker, Professor PJ
Other Investigators:
Lees, Dr J Benedikt, Professor J
Researcher Co-Investigators:
Project Partners:
Arelis - Thomson Broadcast Defence Science & Tech Lab DSTL Diamond Microwave Devices Ltd
European Space Agency (UK) IQE (Europe) Ltd Kelvin Nanotechnology Ltd
M/A Com Technology Solutions (UK) Ltd NXP Semiconductors UK Limited Oxford Instruments Plc
Plessey Semiconductors Ltd Rohde & Schwarz UK Limited
Department: Sch of Engineering
Organisation: Cardiff University
Scheme: Standard Research
Starts: 01 July 2016 Ends: 30 June 2021 Value (£): 562,873
EPSRC Research Topic Classifications:
Electronic Devices & Subsys. Materials Characterisation
Materials Synthesis & Growth RF & Microwave Technology
EPSRC Industrial Sector Classifications:
Communications Electronics
Related Grants:
EP/N014820/2 EP/N015878/1 EP/N016610/1 EP/N017927/1
Panel History:
Panel DatePanel NameOutcome
20 Oct 2015 EPSRC ICT Prioritisation Panel - Oct 2015 Announced
Summary on Grant Application Form
Future generation (5G) mobile phones and other portable devices will need to transfer data at a much higher rate than at present in order to accommodate an increase in the number of users, the employment of multi-band and multi-channel operation, the projected dramatic increase in wireless information exchange such as with high definition video and the large increase in connectivity where many devices will be connected to other devices (called "The Internet of Things"). This places big challenges on the performance of base stations in terms of fidelity of the signal and improved energy efficiency since energy usage could increase in line with the amount of data transfer. To meet the predicted massive increase in capacity there will be a reduced reliance on large coverage base-stations, with small-cell base-stations (operating at lower power levels) becoming much more common. In addition to the challenges mentioned above, small cells will demand a larger number of low cost systems.

To meet these challenges this proposal aims to use electronic devices made from gallium nitride (GaN) which has the desirable property of being able to operate at very high frequencies (for high data transfer rates) and in a very efficient manner to reduce the projected energy usage. To maintain the high frequency capability of these devices, circuits will be integrated into a single circuit to reduce the slowing effects of stray inductances and capacitances. Additionally these integrated circuits will be manufactured on large area silicon substrates which will reduce the system unit cost significantly.

The proposed high levels of integration using GaN devices as the basic building block and combining microwave and switching technologies have never been attempted before and requires a multi-disciplinary team with complementary specialist expertise. The proposed consortium brings together the leading UK groups with expertise in GaN crystal growth (Cambridge), device design and fabrication (Sheffield), high frequency circuit design and fabrication (Glasgow), variable power supply design (Manchester) and high frequency characterisation and power amplifier design (Cardiff). Before designing and developing the technology for fabricating the integrated systems to demonstrate the viability of the proposed solutions, a deep scientific understanding is required into how the quality of the GaN crystals on silicon substrates affect the operation of the devices. In summary, the powerful grouping within the project will bring together the expertise to design and produce the novel integrated circuits and systems to meet the demanding objectives of this research proposal.
Key Findings
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Potential use in non-academic contexts
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Date Materialised
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Organisation Website: http://www.cf.ac.uk