Inexpensive Interferometer for Low Frequency Radio Astronomy

Rosa, Guilherme S.; Schuch, Nelson Jorge; Gomes, Natanael Rodrigues; Bergmann, J.R.; Echer, E.; Machado, Renato

doi:10.14209/jcis.2012.5

Cited by 3 publications

(1 citation statement)

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“…To verify if the cosmic ray emissions are detectable and useable in an observational site region, the LOFAR Prototype Station (LOPES) was built, which is, basically, a dipole antennas array, developed for testing some LOFAR concept aspects (Rosa et al, 2010a). …”

Section: Introductionmentioning

confidence: 99%

Study of Antennas for a Low Cost Interferometer

Alves¹,

Schuch²,

Camponogara³

et al. 2011

12th International Congress of the Brazilian Geophysical Society &Amp; EXPOGEF, Rio De Janeiro, Brazil, 15–18 August 2011

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The project of a modern interferometric array similar to the Low Frequency Array (LOFAR) Prototype Station (LOPES), to cover the LOFAR frequency range under 100 MHz is being developed at the Southern Space Observatory (SSO, 29.4 o S, 59.4 o W), São Martinho da Serra, RS, Brazil. Therefore, it is necessary to study different kinds of antennas that cover the large proportions of the interferometer necessity. The large number of antennas required for a LOFAR like interferometer suggests that the antenna design must have: a low development cost, avoid complex mechanical structures, robust mechanical facilities, and a large useful bandwidth dominated by the Galactic radio noise, in order to maintain a low station cost. This work presents a study of four kinds of antennas designs (NLTA, Inverted-V dipole, Fork and Half-wavelength dipole), the results of antennas simulations comparisons using the NEC-2 software and finally for each antenna a cost-benefit analysis.

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Section: Introductionmentioning

confidence: 99%