Enhancing and suppressing radiation with some permeability-near-zero structures

TL;DR

This paper explores how permeability-near-zero materials can be used to significantly enhance or suppress electromagnetic radiation from a line source by manipulating surrounding dielectric and conducting structures.

Contribution

It introduces novel configurations using permeability-near-zero shells and dielectric domains to control radiation, including enhancement, suppression, and directive radiation.

Findings

Radiation can be greatly enhanced with proper dielectric shell dimensions.

Complete suppression of radiation achieved with additional dielectric or PEC inside the shell.

Enhanced directive radiation demonstrated with a PEC substrate.

Abstract

Using some special properties of a permeability-near-zero material, the radiation of a line current is greatly enhanced by choosing appropriately the dimension of a dielectric domain in which the source lies and that of a permeability-near-zero shell. The radiation of the source can also be completely suppressed by adding appropriately another dielectric domain or an arbitrary perfect electric conductor (PEC) inside the shell. Enhanced directive radiation is also demonstrated by adding a PEC substrate.