Radiation from elementary sources in a uniaxial wire medium

TL;DR

This paper explores the unique radiation behaviors of elementary sources in a uniaxial wire medium, revealing anomalous patterns such as isotropic-like radiation near plasma frequency and infinite directivity from a voltage source.

Contribution

It introduces the analysis of elementary source radiation in wire media, highlighting unusual patterns and properties not observed in conventional media.

Findings

Radiation pattern of a short dipole resembles isotropic radiation near plasma frequency.

Lumped voltage source exhibits infinite directivity.

Far-field distribution is non-diffractive.

Abstract

We investigate the radiation properties of two types of elementary sources embedded in a uniaxial wire medium: a short dipole parallel to the wires and a lumped voltage source connected across a gap in a generic metallic wire. It is demonstrated that the radiation pattern of these elementary sources have quite anomalous and unusual properties. Specifically, the radiation pattern of a short vertical dipole resembles that of an isotropic radiator close to the effective plasma frequency of the wire medium, whereas the radiation from the lumped voltage generator is characterized by an infinite directivity and a non-diffractive far-field distribution.