Band-4+5 initial prototype receiver front-end for ALMA2030 wideband sensitivity upgrade
The Atacama Large Millimeter/submillimeter Array (ALMA) Band-4+5 receivers are proposed for the upgrade after 2030. The new receiver will cover the RF frequency of the original Band-4 (125–163GHz) and Band-5 (163–211GHz) with continuous frequency tuning over dual polarizations, dual sidebands with instantaneous interme...