SteppIR Communications Systems is the manufacturer of the SY3-EMC antenna system, the solution for a 50-year-old problem with MIL-STD-461 RS103 radiated susceptibility in the frequency range of 30-200 MHz. Our system utilizes a mechanically adjustable Yagi antenna, which with the help of a sophisticated software algorithm, creates unique, fully optimized antennas at every frequency within its range, in both horizontal and vertical polarization.