Broadband active differential array for the mid-frequency SKA band

González Posadas, Vicente and García Muñoz, Luis Enrique and Segovia Vargas, Daniel and García Pérez, Oscar and Ugarte Muñoz, Eduardo and Serna Puente, José Manuel and López Fernández, J. A. (2014). Broadband active differential array for the mid-frequency SKA band. "IEEE Antennas and Propagation Magazine", v. 56 (n. 2); pp. 27-38. ISSN 1045-9243.


Title: Broadband active differential array for the mid-frequency SKA band
  • González Posadas, Vicente
  • García Muñoz, Luis Enrique
  • Segovia Vargas, Daniel
  • García Pérez, Oscar
  • Ugarte Muñoz, Eduardo
  • Serna Puente, José Manuel
  • López Fernández, J. A.
Item Type: Article
Título de Revista/Publicación: IEEE Antennas and Propagation Magazine
Date: April 2014
ISSN: 1045-9243
Volume: 56
Freetext Keywords: antenna phased arrays, dielectric-loaded antennas, low noise amplifiers, radiotelescopes, receiving antennas, slot antenna arrays, ultra wideband antennas
Faculty: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Department: Teoría de la Señal y Comunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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This paper presents the design and characterization process of an active array demonstrator for the mid-frequency range (i.e., 300 MHz-1000 MHz) of the future Square Kilometre Array (SKA) radio telescope. This demonstrator, called FIDA3 (FG-IGN: Fundación General Instituto Geográfico Nacional - Differential Active Antenna Array), is part of the Spanish contribution for the SKA project. The main advantages provided by this design include the use of a dielectric-free structure, and the use of a fully-differential receiver in which differential low-noise amplifiers (LNAs) are directly connected to the balanced tapered-slot antennas (TSAs). First, the radiating structure and the differential low-noise amplifiers were separately designed and measured, obtaining good results (antenna elements with low voltage standing-wave ratios, array scanning capabilities up to 45°, and noise temperatures better than 52 K with low-noise amplifiers at room temperature). The potential problems due to the differential nature of the proposed solution are discussed, so some effective methods to overcome such limitations are proposed. Second, the complete active antenna array receiving system was assembled, and a 1 m2 active antenna array tile was characterized.

Funding Projects

UnspecifiedEC2009-14525-C02-01UnspecifiedUnspecifiedEuropean Community Framework Programme 6, Square Kilometre Array Design Studies (SKADS), contract No. 011938

More information

Item ID: 36175
DC Identifier:
OAI Identifier:
DOI: 10.1109/MAP.2014.6837064
Official URL:
Deposited by: Memoria Investigacion
Deposited on: 12 Feb 2016 15:42
Last Modified: 12 Feb 2016 15:42
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