A horn-reflector antenna for high-performance submillimetre-wave imaging arrays |
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Authors: | S. Withington G. Yassin M. Buffey C. Norden |
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Affiliation: | (1) Department of Physics, University of Cambridge, Madingley Road, Cambridge, United Kingdom |
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Abstract: | We have developed an antenna for high-performance submillimetrewave imaging arrays. The antenna comprises a corrugated horn with an off-axis paraboloidal reflector at its aperture. The corrugated horn is machined directly into two halves of a split aluminium block. This approach avoids electroforming and is compatible with E-plane circuit technology. The resulting antenna is light weight and is ideal for space applications. For compatibility with submillimetre-wave optics, the the behaviour has been calculated by using Gaussian-Hermite modes, and the integrity of the theory has been verified by modelling the behaviour of a 17GHz antenna. The manufacturing procedure has been investigated by machining and testing a horn-reflector antenna for 450–500GHz. Our next step is to extend the technique to 1THz. |
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