Title :
Design and Validation of a Reconfigurable Single Varactor-Tuned Reflectarray
Author :
Venneri, F. ; Costanzo, S. ; Di Massa, Giuseppe
Author_Institution :
Dipt. di Elettron., Inf. e Sist., Univ. della Calabria, Rende, Italy
Abstract :
An aperture-coupled reflectarray element giving a full phase tuning range with a single varactor diode is proposed in this paper for pattern reconfigurability applications. The full phase agility is achieved by a proper optimization of the phase tuning line, thus providing an alternate inductive/capacitive effect able to avoid the use of two varactor diodes, usually adopted in similar existing configurations. The proposed active element structure is adopted to design a demonstrative reflectarray prototype of 3 × 15 radiators. Furthermore, an own synthesis procedure is applied to obtain the proper biasing voltages giving the prescribed H-plane field. Test examples of beam-scanning, multibeam, and shaped-beam patterns are discussed to demonstrate the effectiveness of the approach.
Keywords :
reflectarray antennas; varactors; H-plane field; active element structure; aperture coupled reflectarray element; beam scanning; capacitive effect; demonstrative reflectarray prototype; full phase tuning range; inductive effect; pattern reconfigurability application; phase tuning line; reconfigurable single varactor tuned reflectarray; shaped beam pattern; single varactor diode; varactor diodes; Capacitance; Impedance; Microstrip; Prototypes; Reflector antennas; Tuning; Varactors; Beam-scanning antennas; microstrip arrays; reconfigurable antennas; reflectarray antennas; reflector antennas; varactors;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2226229