Antenna Tiles for the Murchison Widefield Array

Details Antenna Tiles for the Murchison Widefield Array Antenna Tiles for the Murchison Widefield Array

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347407c&link_type=abstract

American Astronomical Society, AAS Meeting #213, #474.07; Bulletin of the American Astronomical Society, Vol. 41, p.428

Astronomy and Astrophysics

Astronomy

Scientific paper

The Murchison Widefield Array (MWA) will, when completed, employ 512 antenna "tiles" for radio astronomical observations at 80-300 MHz in a radio-quiet zone in Western Australia. Each tile consists of two major sub-systems: (1) 16 dual-polarization, active dipole elements arranged in a 4x4 array over a conductive groundscreen, and (2) an analog beamformer that creates a single beam on the sky from the 16 dipole signals of each polarization. In the initial phase of MWA construction, 32 tiles have been installed at the MWA site, and they are being used in a variety of electronic, environmental, and radio astronomical tests and observations. We will present some of the results of these tests and of complementary laboratory tests, antenna range measurements, and electromagnetic simulations. We will also discuss the novel design features and installation methods developed to reduce the costs of hardware, installation, and maintenance.

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