Dynamic Beam Shaping Using a Dual-Band Metasurface-Inspired Electronically Tunable Reflectarray Antenna

An electronically reconfigurable dual-band-reflectarray antenna is presented in this paper. The tunable unit cell, a ring loaded square patch with a single varactor diode connected across the gap between the ring and the patch, is modeled using both a full-wave solver and an equivalent circuit. The...

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Bibliographic Details
Published in:arXiv.org 2015-08
Main Authors: Tayebi, Amin, Tang, Junyan, Pavel Roy Paladhi, Udpa, Lalita, Udpa, Satish, Rothwell, Edward
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Circuits
Computer simulation
Equivalent circuits
Frequencies
Frequency selective surfaces
Metasurfaces
Steering
Superhigh frequencies
Unit cell
Varactor diodes
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Summary:An electronically reconfigurable dual-band-reflectarray antenna is presented in this paper. The tunable unit cell, a ring loaded square patch with a single varactor diode connected across the gap between the ring and the patch, is modeled using both a full-wave solver and an equivalent circuit. The parameters of the equivalent circuit are calculated independently of the simulation and experiment using analysis techniques employed in frequency selective surfaces. The reflection phase of the proposed unit cell is shown to provide an excellent phase range of 335\(^{\circ}\) in F band and 340\(^{\circ}\) in S band. Results from the analysis are used to design and build a 10x10 element reflectarray antenna. The high tuning phase range of each element allows the fabricated reflectarray to demonstrate a very broad steering range of up to \(\pm\)60\(^{\circ}\) in both frequency bands.
ISSN:2331-8422
DOI:10.48550/arxiv.1508.03914