A 1-Bit Coding Reconfigurable Metasurface Reflector for Circularly
Polarized Wave Beam Steering from Linearly Polarized Incidence
Abstract
A 1-bit reconfigurable metasurface reflector is designed. It can provide
beam-steering of circularly polarized (CP) re- flected waves when a
linearly polarized (LP) plane wave is incident upon it. The unit cell of
the metasurface provides 1-bit coding (‘bit-0’ and ‘bit-1’) for both
v- and u-polarized reflected waves when two distinct
reverse bias voltages (3 V and 20 V) are applied to the varactor diodes.
Using such unit elements, a 20×20 array is constructed. During the array
construction, a quadrature phase difference is main- tained between the
v- and u- polarized components of each element. Using both
theory and full-wave simulation re- sults, it is shown that the proposed
metasurface reflectarray can steer two symmetrically deflected CP beams
with two opposite handedness for a LP plane wave incidence.