| EPSRC Reference: |
GR/J43028/01 |
| Title: |
SWITCHED APERTURE ANTENNAS USING ACTIVE FSS |
| Principal Investigator: |
Parker, Professor EA |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Engineering & Digital Arts |
| Organisation: |
University of Kent |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
24 June 1994 |
Ends: |
23 March 1998 |
Value (£): |
131,815
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
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Summary on Grant Application Form |
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To demonstrate the feasibility of using active FSS to enable the effective aperture dimensions and beamwidth of a microwave antenna to be varied.To construct as demonstrators waveguide horns incorporating active FSS.To identify active FSS designs best suited to this application.Progress:A waveguide horn which can be electronically switched between two fixed beamwidths has been manufactured and successfully tested. This consisted of an H-plane sectoral horn with an inside FSS wall of dipole elements in theE-plane. When adjacent dipoles in the direction of the E-field are connected together with diodes it is possible to switch the FSS configuration between an ordinary dipole array (when the diodes are reverse biased) and an array of conducting strips (when the diodes are forward biased). The FSS may be designed to have the dipole array resonate (and thus have a transmission null) at the same frequency where the array of conducting strips is almost transparent. Thus the inner wall can be converted from being transparent (when the horn behaves as though the inner wall were absent) to being opaque (when the inner FSS wall reduces the horn's effective transmitting aperture thereby increasing its beamwidth). These results have now been published [1]. [1] B. Philips, E.A. Parker and R.J. Langley : Active FSS in an experimental horn antenna switchable between two beamwidths , Electronics Letters, Vol. 31, pp.1-2, January 5, 1995.
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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.kent.ac.uk |