Monopulse 77GHz Fresnel Zone Plate Reflector

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 4Language: englishTyp: PDF

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Nguyen, T. P.; Pichot, C.; Migliaccio, C. (LEAT, Nice Sophia Antipolis University, CNRS, 250, rue Albert Einstein, Bât. 4 - 06560 Valbonne, France)

This paper describes the principle of combining circular or annular patches with C-patches on a Fresnel reflector. The latter can introduce radiation pattern diversity according to the polarization. Patches are designed to perform a 180deg phase difference of the reflection phase between two orthogonal polarizations for a monopulse antenna purpose. Simulations on a small half-wavelength Fresnel Zone Plate (FZP) reflector have been conducted in order to check the antenna concept. The final antenna will include a (2pilambda/8) Fresnel correction, i.e an 8 zones Fresnel reflector. C-patches have already been designed at 77 GHz and the reflector measurements have been conducted.