(a) Schematic principle of the desired parabolic reflector. (b) Measured far field radiation patterns of the planar parabolic metasurface reflector antenna compared to that of the feeding source alone. (c) Measured far field radiation patterns showing off-normal radiation of the beam.

Contexts in source publication

Context 1

... at x0. A direct coaxial-fed microstrip patch antenna designed for a 10 GHz operation is used as primary source and is placed at the focal point f. Since the varactor diodes are addressed in a column configuration, the designed metasurface allows to apply a phase modulation in only the xOz plane, corresponding to a cylindrical parabolic profile. Fig. 2(a) presents the schematic principle of the cylindrical parabolic metasurface reflector antenna. The phase profiles are obtained by applying the correct bias voltages along the metasurface. Measured far-field radiation patterns of the antenna system for x0 = 0 at 10 GHz shows a directive radiated beam. After reflection on the metasurface, ...

Context 2

... main beam can be steered to an off-normal direction by keeping the feeding source fixed at x = 0 and moving the parabolic phase profile laterally such that the feeding source is virtually displaced in the focal plane. Three different phase profiles are considered for different offsets x0 = 6 mm, 12 mm and 48 mm. The results presented in the Fig. 2(c) show that the main beam is deflected and a high beam steering angle of 55° is obtained when an offset of 48 mm is ...