| EPSRC Reference: |
GR/L37137/01 |
| Title: |
ULTRALINEAR CIRCUITS AND DEVICES FOR MICROWAVE FREQUENCIES |
| Principal Investigator: |
Haigh, Dr D |
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| Department: |
Electronic and Electrical Engineering |
| Organisation: |
UCL |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 May 1997 |
Ends: |
30 April 2000 |
Value (£): |
163,891
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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The emerging demand for wireless and satellite broadband systems using efficient modulation techniques require the development of ultra-low distortion circuits and devices to minimise the problems of interchannel interference and modulation corruption that arise from the non-linearities of the active device. This addressed through the combined use of low distortion circuit design techniques and low distortion devices. The design technique 'Derivative Superposition' allows the design of low distortion amplifiers and of nonlinear circuits such as frequency triplers over a very broad bandwidth. A novel high pass transmission line form of derivative superposition allows the possible application of the technique at low millimetre wave frequencies with decade bandwidths. 'Channel doped' and 'Multi channel' HEMTs with low distortion will be developed. Particular attention will be given to minimising short channel effects and increasing the sharpness of pinch off and obtaining high repeatability through the use of buffer layers. The combination of 'derivative superposition' and low distortion devices will lead to high linearity ultra broadband MMICs.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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