Design of Ka-band Reflectarray antennas for high-resolution SAR instrument

In this paper, we present the design of polarization selective reflectarrays for high resolution and wide swath SAR instrument in Ka-band. The antenna system consists of nine dual-offset reflectarray panels, each with the size of 1.5m x 0.55 m. The reflectarrays operate in two modes; a high-resolution mode with a directive beam in one polarization and a low-resolution mode with a broader beam in the orthogonal polarization. Two designs are presented; a single-layer design and a multilayer design. Both designs provide a gain >46.7 dBi for the high-resolution mode and a gain >45.2 dBi for the low-resolution mode.

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