A 6-12 GHz Analogue Lag-Correlator for Radio Interferometry

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dc.creatorHoller, Christian M.
dc.creatorKaneko, Tak
dc.creatorJones, Michael E.
dc.creatorGrainge, Keith
dc.creatorScott, Paul
dc.date2007-01-23
dc.date.accessioned2026-07-07T11:42:43Z
dc.date.available2026-07-07T11:42:43Z
dc.descriptionAims: We describe a 6-12 GHz analogue correlator that has been developed for use in radio interferometers. Methods: We use a lag-correlator technique to synthesis eight complex spectral channels. Two schemes were considered for sampling the cross-correlation function, using either real or complex correlations, and we developed prototypes for both of them. We opted for the ``add and square'' detection scheme using Schottky diodes over the more commonly used active multipliers because the stability of the device is less critical. Results: We encountered an unexpected problem, in that there were errors in the lag spacings of up to ten percent of the unit spacing. To overcome this, we developed a calibration method using astronomical sources which corrects the effects of the non-uniform sampling as well as gain error and dispersion in the correlator.
dc.description14 pages, 21 figures, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0701644
dc.identifierhttp://arxiv.org/abs/astro-ph/0701644
dc.identifierAstron.Astrophys.464:795-806,2007
dc.identifierdoi:10.1051/0004-6361:20066879
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200986
dc.subjectAstrophysics
dc.titleA 6-12 GHz Analogue Lag-Correlator for Radio Interferometry
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