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The starting point in the design of reflectarray antennas is the derivation of the so-called S-curve, which maps changes in unit cell design parameters to the phase of the scattered field from the cell. In general, full-wave simulations are used to derive this curve, though recently a number of analytical techniques have emerged based on equivalent circuit models (ECMs). However, most ECMs are cumbersome...
In order to design a reconfigurable reflectarray antenna, the phase of the scattered field from each element needs to be accurately determined. This paper presents an equivalent circuit model to compute the reflection coefficient of a desired Floquet mode in reconfigurable reflectarray unit cell, based on a Floquet modal expansion. The model allows for fast and easy predictions of the reflectarray...
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