The Double-Ridged Waveguide Horn Antenna R&S®HF907 with linear polarization is a compact broadband transmitting and receiving antenna for the frequency range of 0.8 to 18GHz.  Due to specific calibration, EMI measurements are the antenna’s main field of application.  High gain and a low VSWR allow the generation of high field-strength levels without any significant return loss as well as the measurement of weak signals.