Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications. (24th July 2013)

• Record Type: Journal Article
• Authors: Venneri, F.; Costanzo, S.; Di Massa, G.
• Other Names: Rocha Alvaro Academic Editor.
• Is Part Of: Journal of electrical and computer engineering. Volume 2013(2013)
• Publication Date: 2013-07-24
• Subjects: Computer engineering -- Periodicals; Electrical engineering -- Periodicals; 621.3905
• DOI: 10.1155/2013/325746
• Languages: English
• ISSNs: 2090-0147

Abstract

Abstract : An electronically tunable reflectarray element is proposed in this work to design beam-steering antennas useful for radar applications. A reduced size reflectarray unit cell is properly synthesized in order to extend the antenna beam scanning capabilities within a wider angular region. The radiating structure is accurately optimized to provide a full phase tuning range by adopting a single varactor load as phase shifter element. A 0.46 λ -reflectarray cell is designed at the frequency of 11.5 GHz, obtaining a phase agility of about 330°. The cell is successfully adopted for the design of a 21 × 21 reconfigurable reflectarray. The antenna is numerically tested for different configurations of the varactors capacitance values, and good beam-steering performances are demonstrated within a wide angular range.