Abstract
This letter shows the practicability of manufacturing complex antennas, as folded reflectarrays or radial line slot arrays operating in Ku-band, by using a low-cost plastic three-dimensional printer. All the antenna parts have been printed, not only the antenna supports. Then, the plastic parts have been opportunely metallized or by using conductive silver-based spray, or by sticking an adhesive copper sheet on them, properly cut with a vinyl cutter plotter. Some strategies to reduce the influence of the inaccurate knowledge of the material characteristics, and a few manufacturing knacks, are also reported.
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