  Time-modulated arrays (TMAs) are able to improve the side-lobe level of the
radiation pattern at the fundamental mode but cannot steer the beam at such a
mode towards a given direction. Beam-steering is possible in a TMA, but only at
the harmonic patterns and at the expense of a severe TMA efficiency reduction.
In this work we propose a TMA approach that simultaneously performs both
features over the same beam by using two sets of switches: (1) single-pole
four-throw switches to generate periodic stair-step pulses suitable for
efficiently synthesizing a uniform steerable beam over the first positive
harmonic, and (2) single-pole single-throw switches to reconfigure the
side-lobe level of the previous beam. Performance, small size,
cost-effectiveness, and performance invariability with the carrier frequency
are features that make this TMA approach a competitive solution for analog
beamforming. Accordingly, the structure is an attractive proposal for the
design of multibeam transceivers.
