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Dichroic Dual-Angle Refractor: Multi-Cell Huygens' Metasurface-Based Circuit Approximation

Georgios Kyriakou, Giampaolo Pisano

Abstract

A dichroic dual-angle refractor based on a 2D Huygens' metasurface model is treated by means of resonant-circuit approximations of multiple cells. The whole parameter space of refraction angles is tested for the analytic approximations involved, whereas the realised refraction guides the choice of optimal such angles. Our results indicate the possibility of sythesising a rectangular array of a number of cells which eventually depends on the low-frequency band diffraction limit. Aberrations from the ideal performance are also examined and attributed to certain approximation caveats.

Dichroic Dual-Angle Refractor: Multi-Cell Huygens' Metasurface-Based Circuit Approximation

Abstract

A dichroic dual-angle refractor based on a 2D Huygens' metasurface model is treated by means of resonant-circuit approximations of multiple cells. The whole parameter space of refraction angles is tested for the analytic approximations involved, whereas the realised refraction guides the choice of optimal such angles. Our results indicate the possibility of sythesising a rectangular array of a number of cells which eventually depends on the low-frequency band diffraction limit. Aberrations from the ideal performance are also examined and attributed to certain approximation caveats.
Paper Structure (4 sections, 1 equation, 1 figure)

This paper contains 4 sections, 1 equation, 1 figure.

Table of Contents

  1. Introduction
  2. Design Updates and multi-cell array S-parameter approximation results
  3. Conclusions
  4. Acknowledgment

Figures (1)

  • Figure 1: $|S_{11}^{\rm uc}|,\ |S_{11}^{\rm uc}|$ and $\theta_{t}^{\rm uc}$ across frequency for $2.2~{\rm mm}\leq x \leq7.4~{\rm mm}$ with a 0.4 mm step. Highlighted are tentative bounds for the low-band and high-band operation.