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Phase-only Shaped Beam Transmit-Array

Cruz, Catarina C. ; Fernandes, C. A. ; Matos, S.A. ; Costa, J.R.

Phase-only Shaped Beam Transmit-Array, Proc IEEE AP-S/URSI International Symp., Boston, United States, Vol. , pp. - , July, 2018.

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A new analytical formulation is presented in this paper to obtain the phase correction function for planar transmit-arrays, to produce a prescribed amplitude template. This phase-only design enables using high transmission unit cells to favor maximum gain. Here, a transmit-array transforms the known power radiation pattern of the primary source into a desired output power pattern. As a proof of concept, two different output power radiation patterns are presented, namely, a sec2 with a roll-off at 45º and a flat-top with 20º of roll-off, at the 30 GHz Ka-band. The transmit-array aperture is 180 mm × 180 mm, with 60 mm focal length. It is illuminated by a 10.8 dBi feed radiation pattern, with circular polarization.