| EPSRC Reference: |
GR/J12604/01 |
| Title: |
RADIATED INTERFERENCE MEASUREMENT TRANSFER TECHNIQUES |
| Principal Investigator: |
Marvin, Professor AC |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Electronics |
| Organisation: |
University of York |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1993 |
Ends: |
30 September 1996 |
Value (£): |
85,776
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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To develop an analysis of the imperfections in Open-Area Test Sites.To use the analysis to develop techniques for emission measurement transfer between sites.Progress:Work on this project has been proceeding in two areas, namely computational simulation and measurements. In the first area, we have been simulating open-area test sites using a Method of Moments wire grid modelling package. The aim is to identify aspects of the sites operation and structure that lead to significant de-polarisation of the radiated emissions from equipment-under-test (EUT) and to quantify their relative significance. This work is necessarily done by simulation as measurements on real sites cannot isolate the several effects present. The most significant depolarisation mechanisms identified are receiving antenna imbalance due to imperfect baluns and scattering from the edges of the conducting groundplane laid over part of the site. This second effect is important when the EUT and measurement antenna are not accurately placed on the site centre-line. The effects of misalignment of antenna cables is less significant. The relative amplitudes of co-polar and cross-polar emissions received from EUTs are predicted from these simulations in the form of a site polarisation matrix. The matrix accounts for the requirement to scan the receiving antenna height during site operation. We have used this matrix to simulate the measurements of different types of EUT and to examine the statistical spread of received emissions bearing in mind that a real EUT is a spurious radiator and no assumptions can be made about its polarisation properties. Our measurements programme has been designed to complement the simulation work and to validate the overall cross-polar to co-polar emissions ratios, the site polarisation matrix. Our site at York has been used for this work to date and we have permission to use another site when required. We are planning to publish our initial results at the forthcoming British Electromagnetics Measurements Conference during 1995. An IEEE Transactions paper is under preparation.
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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.york.ac.uk |