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Reflectarray antennas composed of rectangular grooves with a digitised phase-shift element are designed for the millimetre-wave region. The digitised metal antennas have been realised by quantising the phase shift of each rectangular groove. For 4 bit quantised antennas, the far-field patterns are very similar to those of the non-digitised case and especially show that the measured gain of the 2 bit...
A reflectarray element using a conductor cell with variable height is proposed. It is found that the reflection phase can be tuned by adjusting the height of the conductor cells arranged on the spatially discretised reflector plane. A complete linearised reflection phase thus can be achieved when the proposed conductor cell is used as a unit element. A millimetre-wave antenna has been designed using...
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