January 3, 2006
ALMA Prototype Antenna Evaluation OverviewEvaluation Overview
7
Near-Field Radiometric Holography System
±Transmitter:
°Photonically-generated signal
°50m high tower located 310m from antenna
±Receiver:
°79/104 GHz dual-receiver system
±10 mm spec; 5 mm goal
±Gildas data analysis (Lucas)
¥Transmitter and receiver built by engineering group in Tucson.
¥Transmitter contains a single photodiode directly coupled to a waveguide horn.