Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay

Carrasco, Eduardo and Encinar Garcinuño, José Antonio and Barba Gea, Mariano (2008). Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay. "IEEE Transactions on Antennas and Propagation", v. 56 (n. 8); pp. 2496-2503. ISSN 0018-926X. https://doi.org/10.1109/TAP.2008.927559.

Description

Title: Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay
Author/s:
  • Carrasco, Eduardo
  • Encinar Garcinuño, José Antonio
  • Barba Gea, Mariano
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Antennas and Propagation
Date: August 2008
ISSN: 0018-926X
Volume: 56
Subjects:
Freetext Keywords: Broadband antennas, reflectarrays, time-delay arrays
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electromagnetismo y Teoría de Circuitos [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A significant improvement in the bandwidth of large reflectarrays is demonstrated using elements which allow true-time delay. Two identical, large reflectarrays have been designed using different phase distributions to generate a collimated beam. In the former, the phase distribution is truncated to 360deg as is usual in reflectarray antennas, while in the second, the true phase delay is maintained (three cycles of 360deg). The chosen phase-shifter elements are based on previously measured and validated patches aperture-coupled to delay lines. The radiation patterns for both reflectarrays have been computed at several frequencies and the gain is represented as a function of frequency for both cases. Bandwidth curves are presented as a function of the reflectarray size.

More information

Item ID: 2758
DC Identifier: http://oa.upm.es/2758/
OAI Identifier: oai:oa.upm.es:2758
DOI: 10.1109/TAP.2008.927559
Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4589079&tag=1
Deposited by: Archivo Digital UPM
Deposited on: 30 Mar 2010 06:25
Last Modified: 20 Apr 2016 12:25
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