Speakers
Description
The study has been devoted to the design of X-band TTC antenna on enlarged bandwidth (7.19-7.25 GHz and 8.025-8.400 GHz) and K-band DDL antenna (25.5-27.0 GHz) for Future Low Earth Orbit missions. An innovative TTC antenna has been defined with a compact envelope and good RF performance. The TTC antenna design is based on aperture surface impedence control over wide frequency bandwidth to minimize the crosspolarization up to large scan angles. This RF performance has been achieved placing a corrugated dielectric surface on the top of metallic aperture. In this contest the dielectric material and gluing process have been characterized. An EM model of TTC antenna has been manufactured and tested with a good agreement between experimental and theoretical results. The main features of K-band DDL antenna are: good copolar directivity between 59°and 70° of angular coverage and a very low level of XPD (below -18 dB).
| ESA Technical Officer | Dr Peter Rinous |
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