The expanded very large array

Abstract

In almost 30 years of operation, the Very Large Array (VLA) has proved to be a remarkably flexible and productive radio telescope. However, the basic capabilities of the VLA have changed little since it was designed. A major expansion utilizing modern technology is currently underway to improve the capabilities of the VLA by at least an order of magnitude in both sensitivity and in frequency coverage. The primary elements of the Expanded Very Large Array (EVLA) project include new or upgraded receivers for continuous frequency coverage from 1 to 50 GHz, new local oscillator, intermediate frequency, and wide bandwidth data transmission systems to carry signals with 16 GHz total bandwidth from each antenna, and a new digital correlator with the capability to process this bandwidth with an unprecedented number of frequency channels for an imaging array. Also included are a new monitor and control system and new software that will provide telescope ease of use. Scheduled for completion in 2012, the EVLA will provide the world research community with a flexible, powerful, general-purpose telescope to address current and future astronomical issues.

A broadband digital receiving system with large dynamic range for solar radio observation

“…The ADC sampling rate and resolution of Chinese heliograph -MUSER were 1 GHz and 10 bit (Liu et al 2019), respectively. Furthermore, the Expanded Very Large Array (EVLA: McKinnon et al 2010) could sample input signals with a 4 GHz sampler at 3 bit resolution and high dynamic signals with a 2 GHz sampler at 8 bit resolution. However, the EVLA was not solar-dedicated.…”