Theoretical Analysis on Reflection Properties of Reflectarray Unit Cells Using Quality Factors
Abbreviated Journal Title
IEEE Trans. Antennas Propag.
Cavity resonators; coupled mode analysis; microstrip antennas; quality; (Q) factor; rectangular waveguides; reflectarray; MICROSTRIP REFLECTARRAY; VARIABLE SIZE; ELEMENT; DESIGN; PATCHES; ANTENNA; Engineering, Electrical & Electronic; Telecommunications
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.
Ieee Transactions on Antennas and Propagation
"Theoretical Analysis on Reflection Properties of Reflectarray Unit Cells Using Quality Factors" (2013). Faculty Bibliography 2010s. 4187.