An Equivalent Circuit Model for a Dual Polarised Interdigital Reflective Surface Design

A novel design approach is presented for realizing a compact, lightweight, single-band, single-layer, dual-polarized reflective surface, utilizing an accurate and adaptable equivalent circuit model. The proposed model is validated through numerical analysis and experimental measurements. A reflective surface, with a thickness of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.032\lambda$</tex> operating at 1.5 GHz with a unit cell periodicity of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.13\lambda$</tex>, is presented to demonstrate the approach. The surface is integrated with a wideband antenna and provides a low-profile, high-performance system, demonstrating significant potential for applications requiring compactness and dual polarization properties. This approach offers a practical solution for modern RF and microwave systems.