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I need to design an ultra cheap narrow beam antenna for an industrial application. My current design uses a tapered slot antenna feeding a plastic lens, but the cost of the lens in teflon is way too high for the expected application. Anyone know of a cheap plastic that has reasonable loss at KaBand or V-band?
i am interested in TSA (Tapered Slot Antenna), generally TSA is a broadband and endfire antenna.
i do not know how to feed teflon lens to get narrow beam on your antenna.
how about use fresnel zone plate lens antenna or fresnel zone plate reflectarrays
if your application is not wideband in Ka or V-band?