Analysis and Characterization of a Wide-Angle Impedance Matching Metasurface for Dipole Phased Arrays
- 22 June 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 63 (9), 3928-3938
- https://doi.org/10.1109/tap.2015.2448231
Abstract
The effects of mutual coupling impact the performance of phased arrays as the beam is scanned off broadside. Wide-angle impedance matching (WAIM) alleviates this problem from a transmission-line impedance matching viewpoint, increasing the useable scan range of the array. Traditionally, a dielectric slab is placed at some distance above the array, resulting in a match at some given angle off broadside. We propose a simpler and more effective solution, replacing the dielectric slab with an ultra-thin metasurface composed of a sheet of split-ring resonators (SRRs) to improve the scanning characteristics of a dipole phased array. It is shown that the presence of the metasurface results in significant improvements in multiple scan planes. A generalized equivalent transmission-line model is introduced for the classical WAIM configuration and adapted for the metasurface. A quasianalytical model based on the equivalent transmission-line model and the extracted scattering parameters of the metasurface properly predicts the scan range of the full structure, and allows for an accelerated design process.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada (NSERC).
This publication has 17 references indexed in Scilit:
- A wide-angle impedance matching metasurfacePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- Wideband multilayer WAIM design and optimizationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2014
- Optimization of metamaterial WAIM for planar arraysPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2013
- Wide angle impedance matching metamaterials for waveguide-fed phased-array antennasIET Microwaves, Antennas & Propagation, 2010
- Negative‐Refraction MetamaterialsPublished by Wiley ,2005
- Circular Waveguide Loaded with Dielectric Discs for Increased Usable BandwidthPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Analysis of an infinite array of rectangular microstrip patches with idealized probe feedsIEEE Transactions on Antennas and Propagation, 1984
- Dielectric-Lined Circular Waveguide with Increased Usable BandwidthIEEE Transactions on Microwave Theory and Techniques, 1964
- Gain and impedance variation in scanned dipole arraysIEEE Transactions on Antennas and Propagation, 1962
- Mutual coupling effects in large antenna arrays: Part 1--Slot arraysIEEE Transactions on Antennas and Propagation, 1960