Geodetic VLBI ultra low noise broad-band receiver for 13 meter VGOS radiotelescopes
| Autor: | Sonia Garcia-Alvaro, J. M. Serna, Pablo Garcia-Carreno, J. A. López-Pérez, J. A. López-Fernández, Rocio Sanchez-Montero, Maria Patino-Esteban, P. L. Lopez-Espi, Beatriz Vaquero-Jimenez |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Noise temperature Optical fiber Frame (networking) Geodetic datum 020206 networking & telecommunications 02 engineering and technology law.invention Interferometry 020210 optoelectronics & photonics law Very-long-baseline interferometry 0202 electrical engineering electronic engineering information engineering Electronic engineering Radio frequency Noise (radio) Remote sensing |
| Zdroj: | 2016 11th European Microwave Integrated Circuits Conference (EuMIC). |
| DOI: | 10.1109/eumic.2016.7777595 |
| Popis: | This paper shows the design, construction and characterization of an ultra-low noise and broad-band receiver system, to be used for geodetic very long baseline interferometry (VLBI) observations with the Spanish new 13.2 meter radiotelescopes, in the frame of the VLBI Global Observing System (VGOS). The cryogenic receiver front-end covers the frequency range 2–14 GHz in two simultaneous linear polarizations. It has an average receiver noise temperature lower than 20 Kelvin, except for those frequencies affected by radio frequency intereferences (RFI). The detected signals are sent to the back-end room using broad-band RF over fiber optic links. Then, the signals are distributed to four dual-channel frequency up/down converters, which provide the base-band signals for the digital VLBI back-ends. |
| Databáze: | OpenAIRE |
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