Abstract
This letter presents the design of a reflectarray antenna consisted of metallic elements, which can be manufactured via the simple die casting process as that for the reflector antennas. In the design, the reflecting elements are integrated as a whole piece of metal without using any dielectric or air substrates, and result in very high radiation efficiency at a low manufacture cost. The antenna is prototyped at Ku-band for the civilian satellite DTV applications. The experimental results show a radiation efficiency up to 90% comparable to the reflector antennas, and demonstrate the feasibility of the design concept.
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