The Murchison Widefield Array (MWA) consists of 2048 dual-polarization dipole antennas,
arranged in 128 "tiles", each a 4x4 array of dipoles. The dipoles are
sensitive to radio waves in the 80--300 MHz frequency range.
The array has no moving parts, and all telescope functions, including pointing, are performed by electronic manipulation
of dipole signals.
In Phase I of the Array, the majority (112) of the 128 tiles are scattered across a core region about 1.5 km in diameter,
with the others placed at locations outside the core, yielding baseline distances of about 3 km
to allow higher angular resolution observations.
The array is currently being expanded for Phase II, which will double the number of antennas, and double the
maximum baseline length to about 6km.