Various techniques are disclosed to suppress undesired signal components
introduced by non-linear amplifiers of phased array antenna systems to
accommodate bandwidths greater than one octave. For example, in
accordance with one embodiment, a phased array antenna system includes
first and second antenna elements adapted to provide first and second
received signals in response to a radio signal. The second antenna
element is rotated approximately 180 degrees in relation to the first
antenna element. Amplifiers may amplify the received signals to provide
amplified signals having a bandwidth greater than one octave. Undesired
components of the amplified signals introduced by the amplifiers may be
suppressed through appropriate phase shifts performed by associated phase
shifters and/or power combiners. A power combiner may combine the first
and second output signals to provide a combined signal, wherein the first
and second undesired components are suppressed in the combined signal
relative to the amplified signals.