LOFAR antenna development and initial observations of solar bursts

Details LOFAR antenna development and initial observations of solar bursts LOFAR antenna development and initial observations of solar bursts

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....10998s&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #10998

Astronomy and Astrophysics

Astronomy

Scientific paper

We are developing and testing active baluns and electrically short dipoles for possible use as the primary wideband receiving elements in the Low Frequency Array (LOFAR), an instrument intended primarily for long wavelength radio astronomy. Two dipoles with dimensions scaled approximately by a factor of three have been built and tested. Their useful spectral range occurs when the dipole arms are approximately 1/8 to 1/2 wavelength long. The antenna temperatures vary from about 25 % to 100 % of the average brightness temperature of the Galactic background. With these parameters it is easy to make the amplifier noise levels low enough that final system temperature is dominated by the Galactic background. We present spectra of solar bursts observed with active antenna prototypes.

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