Title :
The expanded very large array low band upgrade
Author :
Clarke, Tracy E. ; Perley, Rick A. ; Kassim, Namir E. ; Hicks, Brian C. ; Owen, Frazer N. ; Durand, Steve ; Kutz, Chuck ; Pospieszalski, Marian ; Weiler, Kurt W. ; Wilson, Tom L.
Author_Institution :
Remote Sensing Div., Naval Res. Lab., Washington, DC, USA
Abstract :
The EVLA upgrade will enable full frequency coverage between 1 and 50 GHz. The legacy 74 and 330 MHz low frequency receivers have been largely decommissioned by compatibility issues with the new EVLA digital electronics. We describe an EVLA Low Band initiative to replace the existing narrow band receivers with a new low-noise, broadband system covering 66 to 470 MHz. The bandwidth at 74 MHz will increase by more than an order of magnitude while the 330 MHz bandwidth increases by a factor of 6. The initial deployment of the system will use the current, limited bandwidth feeds.
Keywords :
radioastronomy; receivers; EVLA digital electronics; EVLA upgrade; Expanded Very Large Array low band upgrade; broadband system; frequency 1 GHz; frequency 330 MHz; frequency 50 GHz; frequency 66 MHz to 470 MHz; frequency 74 MHz; low frequency receivers; narrow band receivers; noise; Arrays; Feeds; Noise; Observatories; Radio astronomy; Radiofrequency interference; Receivers;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051196
