Magnification of Subwavelength Field Distributions at Microwave Frequencies Using a Wire Medium Slab Operating in the Canalization Regime

TL;DR

This paper demonstrates the magnification of subwavelength field distributions at microwave frequencies using a wire medium slab in the canalization regime, achieving a threefold magnification of complex near-field patterns through numerical simulations.

Contribution

It introduces a novel wire medium slab design with radial wire spacing enlargement operating at Fabry-Perot resonance for subwavelength field magnification.

Findings

Near-field distribution is canalized over ~3λ

Distribution details are magnified by a factor of three

Operation effectiveness varies with frequency deviations from resonance

Abstract

Magnification of subwavelength field distributions using a wire medium slab operating in the canalization regime is demonstrated using numerical simulations. The magnifying slab is implemented by radially enlarging the distance between adjacent wires, and the operational frequency is tuned to coincide with the Fabry-Perot resonance condition. The near-field distribution of a complex-shaped source is canalized over an electrical distance corresponding roughly to $3\lambda$, and the distribution details are magnified by a factor of three. The operation of the slab is studied at several frequencies deviating from the Fabry-Perot resonance.