| EPSRC Reference: |
GR/R82791/01 |
| Title: |
A Novel Measurement system for Characterising Microwave Ferrite Materials |
| Principal Investigator: |
Smith, Dr P |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Department: |
Electronic, Electrical and Computer Eng |
| Organisation: |
University of Birmingham |
| Scheme: |
Fast Stream |
| Starts: |
30 October 2002 |
Ends: |
29 October 2005 |
Value (£): |
127,881
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
RF & Microwave Technology |
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| EPSRC Industrial Sector Classifications: |
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Summary on Grant Application Form |
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It is the aim of this proposal to develop a highly sensitive measurement system, at 1800 MHz, capable of accurately measuring the magnetic losses of very low loss microwave Ferrite materials. Currently such materials are characterised at 9.4 GHz in accordance with international standards, but this approach has two substantial drawbacks. The first is that state of the art materials, such as Calcium and Vanadium doped yttrium iron Garnet (CVG), have extremely low losses at 9.4 GHz, so it is very difficult to distinguish between samples of different quality. Secondly it will also overcome the uncertainty associated with understanding how the microwave losses vary with frequency from 9.4 GHz down to 1.8 GHz. Also, in this measurement configuration, the effects of the demagnetising field are greatly reduced by the use of a thin rod of ferrite material magnetised parallel to the axis of the rod. Consequently it may therefore be possible to measure the inherent ferrite materials properties, by separating out the detrimental effects of the demagnetising field. Once the measurement system is operational a range of commercial samples could then be evaluated for there losses and possibly begin to instigate an investigation of the non linear behaviour.
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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 |
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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: |
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| Further Information: |
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| Organisation Website: |
http://www.bham.ac.uk |