Wide-band high linearity active dipole for low frequency radio astronomy

Details Wide-band high linearity active dipole for low frequency radio astronomy Wide-band high linearity active dipole for low frequency radio astronomy

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011exa....32..127f&link_type=abstract

Experimental Astronomy, Volume 32, Issue 2, pp.127-145

Astronomy and Astrophysics

Astronomy

Radio Astronomy, Active Dipole, Antenna Array

Scientific paper

We have developed an active dipole that is intended for use in new generation low frequency array applications. The preamplifier of the active dipole has very high linearity (input IP2 = 70 dBm, input IP3 = 31 dBm) and low noise temperature (100-360 K). The frequency dependence of the dipole impedance and the match between the dipole and preamplifier have been optimized to achieve Galactic noise limited operation. The ratio between the antenna temperature due to Galactic noise and the noise temperature of the preamplifier is 10 ± 1.5 dB over the whole 10 to 70 MHz range. The total cost of the active cross-dipole is 220 euro.

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