A wide-band, active antenna system for long wavelength radio astronomy
We describe an "active" antenna system for HF/VHF (long wavelength) radio astronomy that has been successfully deployed 256-fold as the first station (LWA1) of the planned Long Wavelength Array. The antenna system, consisting of crossed dipoles, an active balun/preamp, a support structure,...
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| creator | Hicks, Brian C Paravastu-Dalal, Nagini Stewart, Kenneth P Erickson, William C Ray, Paul S Kassim, Namir E Burns, Steve Clarke, Tracy Schmitt, Henrique Craig, Joe Hartman, Jake Weiler, Kurt W |
| description | We describe an "active" antenna system for HF/VHF (long wavelength) radio astronomy that has been successfully deployed 256-fold as the first station (LWA1) of the planned Long Wavelength Array. The antenna system, consisting of crossed dipoles, an active balun/preamp, a support structure, and a ground screen has been shown to successfully operate over at least the band from 20 MHz (15 m wavelength) to 80 MHz (3.75 m wavelength) with a noise figure that is at least 6 dB better than the Galactic background emission noise temperature over that band. Thus, the goal to design and construct a compact, inexpensive, rugged, and easily assembled antenna system that can be deployed many-fold to form numerous large individual "stations" for the purpose of building a large, long wavelength synthesis array telescope for radio astronomical and ionospheric observations was met. |
| doi_str_mv | 10.48550/arxiv.1210.0506 |
| format | Article |
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| subjects | Antenna arrays Antennas Astronomy Background noise Celestial bodies Dipoles Noise levels Noise temperature Physics - Instrumentation and Methods for Astrophysics Radio astronomy Very high frequencies |
| title | A wide-band, active antenna system for long wavelength radio astronomy |
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