Title

Theoretical Analysis On Reflection Properties Of Reflectarray Unit Cells Using Quality Factors

Keywords

Cavity resonators; coupled mode analysis; microstrip antennas; quality (Q) factor; rectangular waveguides; reflectarray

Abstract

In this paper, a novel theoretical approach to extract the reflection coefficient of reflectarray unit cells is developed. The approach is applied to single-resonance unit cell elements under metallic-waveguide incidence. Using this theory, effects of different physical parameters on reflection properties of unit cells can be thoroughly studied without the need of full-wave simulations. It is shown that the reflectarray unit cell falls into three coupling regions depending on its physical dimensions and substrate properties, which lead to either well-behaved or inadequate reflection phase. Detailed analysis is performed for $Ka$ -band reflectarray unit cells and verified by full-wave simulations. Reflectarray unit cells with different substrate thicknesses, patch widths, and dielectric constants are fabricated and measured. The measurement data closely matches both the theory and full-wave simulations. The presented theory provides valuable physical insight and guidelines for optimization of reflectarray unit cells. © 1963-2012 IEEE.

Publication Date

1-1-2013

Publication Title

IEEE Transactions on Antennas and Propagation

Volume

61

Issue

1

Number of Pages

201-210

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TAP.2012.2214753

Socpus ID

84872035802 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84872035802

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