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Custom power amplifier chip for an ALMA warm cartridge assembly
A close-up of a crucial component of an ALMA Warm Cartridge Assembly, a custom power amplifier chip designed by US National Radio Astronomy Observatory (NRAO) engineers and fabricated by BAE Systems of Nashua, New Hampshire, using a process that enables such amplifiers to work at frequencies above the normal 100 gigahertz limit of commercially available devices of this type.
Crédit:NRAO/AUI/NSF
