Model 9170-800 - X-Band Cassegrain Monopulse Antenna

This 4-foot parabolic antenna forms part of a complex 2 - 18 GHz RCS measurement system which has been designed for helicopter environments. The X-Band part of the antenna consists of a graphite-epoxy honeycomb reflector and a 9.1 - 9.3 GHz Cassegrain monopulse tracking feed.

The subreflector for the Cassegrain feed is a low-pass Frequency-Selective Subreflector (FSS) design. A quad-ridged 2 - 4 GHz feed is placed at the prime focus behind the subreflector.

Two large lensed horns are fabricated from the same graphite-epoxy materials and located on each side of the reflector. One horn operates from 8 - 12 GHz and the other from 12 - 18 GHz. Both are dual polarized. The entire system is highly integrated to form a robust structure suitable for operating in severe helicopter vibration environments.

The X-band tracking antenna enables the entire antenna system to maintain accurate pointing under severe operational conditions.

This complex L/S-band telemetry-tracking feed system provides a minimum G/T of +22 dB/K when used in a 10 meter reflector. The transmit feed port can handle 500 - 1,000 watts CW. Its dimensions are 20 inches diameter and 58 inches long with a weight of 160 pounds. Monopulse tracking in provided in two channels using four feed elements. The system includes a monopulse scan converter, all RF filters, LNAs, downconverter and extensive BIT provisions. The complete feed system is fully sealed and can be pressurized to 1 psig. Extensive product support and documentation is available for this high-performance feed system.

Model 9385-800
SGLS Autotracking Feed System

Model 9871-800 - 14.0 - 14.5 GHz, 6-foot Monopulse Tracking Antenna
43.4 dBi gain. Handles 20KW peak and 1KW average power. Null depth is 30 dB, Half power beamwidth is 0.85° and first sidelobe level is 21 dB. The feed system can be pressurized to 20 psig.