antennas, the Model ATH18G27A provides the 18.0-26.5GHz response required for many often used test specifications. The ATH18G27A is ideally suited for use with the AR Model 40T18G26A and other high power amplifiers in this frequency range. The export classification for this equipment is EAR99. These commodities, technology or software are controlled for export in accord- ance with the U.S. Export Administration Regulations. Diversion contrary to U.S. law is prohibited. The Model ATH18G27A is a wide band, high gain, high power microwave horn antenna. With a minimum gain of 18.5dB over iso- tropic, the Model ATH18G27A supplies the high intensity fields necessary for RFI/EMI field testing within and beyond the confines of a shielded room. The Model ATH18G27A is extremely compact and light weight for ready mobility, yet is built tough enough for the extra demands of outdoor use and easily mounts on a rigid waveguide by the waveguide flange. Part of a family of microwave frequency Features Graphs ATH18G27A • Antenna • 18.0GHz-26.5GHz AR RF/Microwave Instrumentation 160 Schoolhouse Rd Souderton, PA 18964 215-723-8181 For an applications engi- neer call: 800.933.8181 www.arworld.us FREQUENCY RANGE: 18.0-26.5GHz POWER INPUT (maximum): 350 watts CW POWER GAIN (over isotropic): See Curve VSWR: Typical 1.25:1 BEAMWIDTH (average): See curve CONNECTOR: WR-42 waveguide MOUNTING PROVISIONS: Waveguide flange WEIGHT: 150 g (5.3 oz) SIZE (W x H x D): 6.43 x 5.03 x 9 cm (2.53 x 1.98 x 3.54 in) EXPORT CLASSIFICATION: EAR99 Specifications GAIN VS FREQUENCY