  A new investigation of the supernova remnant (SNR) N157B was carried out with
the Australia Telescope Compact Array. Radio continuum images of the entire 30
Doradus region have been made at 3.5 and 6 cm wavelength with a resolution of
2". These data allow a high resolution study of the spectral index distribution
and polarization properties of both N157B and the nearby 30 Doradus nebula (the
latter will be reported in a subsequent paper). N157B is an extended Crab-type
SNR which may be beginning the transition to a composite remnant. There is
little apparent fine structure and the brightest radio region is several
parsecs from the probable position of the X-ray pulsar. The SNR has a radio
spectral index of -0.19 and is significantly polarized at 3.5 cm but not at
longer wavelengths.
