  Bipolar (+/-1) sequences with no zero state suit particularly well for
safeguarding the switched feeding network efficiency when applied to
time-modulated arrays (TMAs). During the zero state of a conventional
time-modulating sequence, if a given array element is switched off, a certain
amount of energy of the transmitted/received signal is wasted. We propose a
novel single sideband time-modulated phased array (TMPA) architecture governed
by realistic bipolar squared sequences in which the rise/fall time of the
switches is considered. By using single-pole dual-throw switches and
non-reconfigurable passive devices, the TMPA exploits, exclusively, the first
positive harmonic pattern while exhibiting an excellent performance in terms of
efficiency and control level of the undesired harmonics without using synthesis
optimization algorithms (software simplicity).
