AR 10009545, Operating And Service Manual

Page: 17 / 26

Approved for public release by AR RF/Microwave Instrumentation 061813
160 School House Road Souderton, PA 18964-9990 • 215-723-8181 • www.arworld.us Page 1 of 2
Model ATH18G40
Antenna
18GHz–40GHz
The Model ATH18G40 is a wide band, high gain, high power microwave horn antenna. With a minimum gain
of 15.2dB over isotropic, the Model ATH18G40 supplies the high intensity fields necessary for RFI/EMI field
testing within and beyond the confines of a shielded room. The Model ATH18G40 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 antennas, the
Model ATH18G40 provides the 18-40GHz response required for many often used test specifications.
The ATH18G40 can also be custom calibrated to the user’s requirement for use in RF emission testing. The
calibrated model is designated by adding a ‘CC’ suffix to the model. Calibration details must be provided
using Form 701. Contact factory for details.
The export classification for this equipment is EAR99. These commodities, technology or software are
controlled for export in accordance with the U.S. Export Administration Regulations. Diversion contrary to U.S.
law is prohibited.
SPECIFICATIONS
FREQUENCY RANGE .................................................... 18-40GHz
POWER INPUT (maximum) ............................................ 450 watts CW
2000 watts Peak
POWER GAIN (over isotropic) ........................................ See Graph
VSWR
Maximum .............................................................. 1.5:1
Average ................................................................. 1.3:1
BEAM WIDTH (average)
E
Plane .................................................................. See Graph
H Plane ................................................................. See Graph
CONNECTOR .............................................................. WRD 180 C24 waveguide
MOUNTING PROVISIONS ............................................. Waveguide flange
WEIGHT (maximum) ..................................................... 56.7 g (0.125 lbs)
SIZE (WxHxD) ................................................................ 3.73 x 2.69 x 6.27 cm, (1.47 x 1.06 x 2.47 in)