| EPSRC Reference: |
EP/C002083/1 |
| Title: |
High Efficiency Switched Amplifier Based Transmitter Architectures |
| Principal Investigator: |
Fusco, Professor V |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Electronics, Elec Eng & Comp Sci |
| Organisation: |
Queen's University of Belfast |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
17 January 2005 |
Ends: |
16 January 2008 |
Value (£): |
205,699
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| EPSRC Research Topic Classifications: |
| Electronic Devices & Subsys. |
RF & Microwave Technology |
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| EPSRC Industrial Sector Classifications: |
| Communications |
Electronics |
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| Related Grants: |
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| Panel History: |
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Summary on Grant Application Form |
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This programme represents an alternative approach for the creation of high d.c. to r.f. efficient transmitter architectures that can be constructed as monolithic integrated circuits for d.c. power sensitive mobile wireless applications. A generic study of the potential for switched amplifier use as a means for increasing power efficiency and for simplifying the transmitter architectures required for the transmission of PSK, QAM signals relevant to ISM frequencies at 2.45 GHz (WLAN) and 24 GHZ (vehicular telemetry) will be undertaken. In order to effect complete on chip realisation a paradigm shift is required in the design of non-linear switched amplifier design. The strategies proposed here would for the first time allow the effective use of sub-micron PHEMTS in switching amplifier circuits thereby permitting MMIC realisation. In addition by exploiting the power level control and phase preservation properties of switched amplifiers it should be possible, (i) to construct efficient non-linear amplifiers at frequencies much higher than is currently possible, (ii) to use these amplifiers as means for direct amplification of digitally phase modulated signals, (iii) superimpose modulation on phase encoded signals to achieve amplitude level control, as required for example by CDMA, or, to directly realise QAM type modulation in a fashion which is considerably simpler than current practice permits. Issues related to sensitivity to the manufacturing process, limitations on output power level, power added efficiency, bandwidth, and effect of modulation scheme on efficiency will be investigated. The potential for insertion of the new circuit architectures to be developed within this programme into a variety of handheld wireless applications would be significant.
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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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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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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 |
| Summary |
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| Date Materialised |
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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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| Project URL: |
http://www.ecit.qub.ac.uk |
| Further Information: |
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| Organisation Website: |
http://www.qub.ac.uk |