A wide-band, active antenna system for long wavelength radio astronomy
| Autor: | 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. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1086/668121 |
| Popis: | 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. Comment: 33 pages, 12 figures, accepted for publication in Publications of the Astronomical Society of the Pacific |
| Databáze: | arXiv |
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