FT-RF WR137 Standard Gain Horn Antennas (HS Series) integrate a calibrated C-band pyramidal horn with a low-loss waveguide-to-coaxial adapter (5.85 GHz to 8.20 GHz). Featuring standardized 10, 15, 20, or 25 dBi gain options, they provide trusted reference standards for C-band satellite transponder testing, radar cross-section (RCS) evaluations, and anechoic chamber calibration.

Crafted from high-purity aluminum with protective passivated coatings, the WR137 HS series guarantees high polarization purity (>30 dB) and predictable gain curves across its full operational frequency band.