a solid state active aperture high power polarization agile transmitter , either single or dual polarization , employing nonreciprocal antenna elements , designed such that it can be used in an electronic warfare system that is more efficient and less expensive . antenna beam steering is accomplished with variable phase shifters that are used to set the rf signal phase of each element . the beam steering function is implemented with a hardware architecture where the phase shifters are built - in ahead of the power amplifiers such that these low power phase shifters impart phase delays to low power signals without wasting rf signal power and hence improving efficiency . these power transmitter devices are also more reliable , lighter in weight and smaller in size .