SUNUM Anechoic Chamber is a laboratory for measuring medium and low gain antennas up to 20 inches (0.5 m) in diameter. The NSI Spherical Near Field Antenna Measurement System interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from L-band to mm Wave Bands. The system includes NSI Antenna Measurement Software. Measured data can be processed for far-field or holographic patterns yielding complete characterization of the antenna’s performance. A single data set provides information on antenna gain, side lobe structure, beam pointing and cross polarization.