W-Band Transmitter Upgrade for the Haystack UltraWideband Satellite Imaging Radar (HUSIR)

MIT Lincoln Laboratory is building W-band (94 GHz) radar for the Haystack Observatory Radar in Westford, Massachusetts. Designated the Haystack ultra-wide band satellite imaging radar (HUSIR), the new transmitter will improve resolution almost ten-fold in support of the observatory's space surveillance program. Diversified Technologies, Inc. (DTI) received a contract in July 2004 for the design and construction of the radar's new transmitter. This paper provides an overview of the transmitter design, key technical drivers, the VED (gyroklystron and gyro-TWT) interfaces, and a summary of the progress, including installation and testing of the transmitter in 2006