| EPSRC Reference: |
GR/L58125/01 |
| Title: |
A NEW SPHERICAL REFLECTOR MILLIMETREWAVE COMPACT ANTENNA TEST RANGE |
| Principal Investigator: |
Parini, Professor C |
| Other Investigators: |
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| Department: |
Sch of Electronic Eng & Computer Science |
| Organisation: |
Queen Mary University of London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1997 |
Ends: |
30 September 1999 |
Value (£): |
155,938
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Compact Antenna Test Ranges (CATR's) are used extensively at microwave and millimetrewave frequencies to measure radiation patterns of all types of antennas. The number of applications at millimetrewave and sub- millimetrewave frequencies is growing and these require precision antenna measurement capability. The CATR can be used to measure medium to large antennas at sub- millimetrewaves but the surface of the paraboloidal CATR reflector must be made to high accuracy. The new idea is proposed of making the shape of the surface spherical. A spherical reflector has the great advantage that the reflector is symmetrical and that only one radius of curvature is needed. Most optical telescopes have mirrors which are spherical so considerable manufacturing knowledge exists. In principle this will permit CATR operation at THz. Current single offset paraboloidal CATR reflectors have quiet zones limited to about 33% of the main reflector diameter. Dual shaped reflector systems can produce higher usage (80%) but at the expense of two near equal in size shaped offset reflectors. This proposal includes using a new dual reflector feed system that provides a quiet zone size of 80% of the main reflector diameter using only a pair of small subreflectors, which also improve the overall cross-polarisation of the range.
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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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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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