### Abstract

A linear, homogeneous medium, with D + (Combining low line sign)(r + (Combining low line sign)) = ε_{=} · E + (Combining low line sign)(r + (Combining low line sign)) + (α_{=} + σ + (Combining low line sign) × I_{=}) · H + (Combining low line sign)(r + (Combining low line sign)) and B + (Combining low line sign)(r + (Combining low line sign)) = μ_{=} · H + (Combining low line sign)(r + (Combining low line sign)) + (β_{=}+ τ + (Combining low line sign) × I_{=}) · E + (Combining low line sign)(r + (Combining low line sign)) as its frequency-dependent constitutive relations, can be mapped into another linear, homogeneous medium with D + (Combining low line sign)′(r + (Combining low line sign)) = ε_{=} · E + (Combining low line sign)′(r + (Combining low line sign)) + α_{=} · H + (Combining low line sign)′(r + (Combining low line sign)) and B + (Combining low line sign)′(r + (Combining low line sign)) = μ_{=} · H + (Combining low line sign)′(r + (Combining low line sign)) + β_{=} · E + (Combining low line sign)′(r + (Combining low line sign)) as its constitutive relations, provided σ + (Combining low line sign) = -τ + (Combining low line sign). This mapping extends the scope of many extant results on radiation and propagation in linear media. We also delineate the relationship of the condition σ = -τ + (Combining low line sign) to the Post constraint that must be satisfied by the constitutive relations of all physical materials.

Original language | English (US) |
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Pages (from-to) | 168-170 |

Number of pages | 3 |

Journal | Microwave and Optical Technology Letters |

Volume | 15 |

Issue number | 3 |

DOIs | |

State | Published - Jun 20 1997 |

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### All Science Journal Classification (ASJC) codes

- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering