The optics and feed design of the 18 metre reflector antenna for the ngVLA

Authors:

5 September 2022

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 374
DOI:10.1109/iceaa49419.2022.9899880

Abstract

A new radio astronomy interferometer called the Next Generation Very Large Array (ngVLA), a project of the National Radio Astronomy Observatory (NRAO), is envisaged to be built on the Plains of San Agustin in New Mexico, USA [1]. The instrument consists of offset Gregorian dual reflector antennas with approximately 244 antennas with an 18 meter aperture diameter and 19 antennas with 6 meter aperture diameter. At the reflector system’s focus is a suite of cryogenic feeds mounted on an indexer mechanism which cover the frequency range from 1.2 GHz to 116 GHz with a gap at the atmospheric absorption band between 50.5 GHz and 70 GHz.

Keywords

This publication has 1 reference indexed in Scilit:

An Optimal 18 m Shaped Offset Gregorian Reflector for the ngVLA Radio Telescope
IEEE Transactions on Antennas and Propagation, 2021