Aspects on the phase delay and phase velocity in the electromagnetic near-field

Arto Hujanen, Johan Sten

    Research output: Contribution to journalArticleScientific

    18 Citations (Scopus)

    Abstract

    The phase of a complex field and its speed of propagation are fundamental concepts of electromagnetic wave motion. Although it seems to be well-known that faster than light propagation of the phase may occur in, e.g., waveguides and certain dispersive media, it is often ignored that a similar phenomenon, in fact a very marked one, presents itself in the near-field of an arbitrary oscillating current in vacuum. Connected herewith is the observation that the phases of the transverse field components of a dipole approach kr-pi/2 and not kr, in the radiation zone. This article illustrates these phenomena by theoretical and numerical examples as well as indicates their consequences for broad-band wireless communication over short distances
    Original languageEnglish
    Pages (from-to)67-80
    JournalElectromagnetic Waves
    DOIs
    Publication statusPublished - 2006
    MoE publication typeB1 Article in a scientific magazine

    Fingerprint

    Light propagation
    Phase velocity
    phase velocity
    Electromagnetic waves
    near fields
    Waveguides
    Vacuum
    electromagnetism
    Radiation
    propagation
    Communication
    wireless communication
    electromagnetic radiation
    dipoles
    broadband
    waveguides
    vacuum
    radiation

    Cite this

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    abstract = "The phase of a complex field and its speed of propagation are fundamental concepts of electromagnetic wave motion. Although it seems to be well-known that faster than light propagation of the phase may occur in, e.g., waveguides and certain dispersive media, it is often ignored that a similar phenomenon, in fact a very marked one, presents itself in the near-field of an arbitrary oscillating current in vacuum. Connected herewith is the observation that the phases of the transverse field components of a dipole approach kr-pi/2 and not kr, in the radiation zone. This article illustrates these phenomena by theoretical and numerical examples as well as indicates their consequences for broad-band wireless communication over short distances",
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    language = "English",
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    journal = "Electromagnetic Waves",
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    Aspects on the phase delay and phase velocity in the electromagnetic near-field. / Hujanen, Arto; Sten, Johan.

    In: Electromagnetic Waves, 2006, p. 67-80.

    Research output: Contribution to journalArticleScientific

    TY - JOUR

    T1 - Aspects on the phase delay and phase velocity in the electromagnetic near-field

    AU - Hujanen, Arto

    AU - Sten, Johan

    PY - 2006

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    AB - The phase of a complex field and its speed of propagation are fundamental concepts of electromagnetic wave motion. Although it seems to be well-known that faster than light propagation of the phase may occur in, e.g., waveguides and certain dispersive media, it is often ignored that a similar phenomenon, in fact a very marked one, presents itself in the near-field of an arbitrary oscillating current in vacuum. Connected herewith is the observation that the phases of the transverse field components of a dipole approach kr-pi/2 and not kr, in the radiation zone. This article illustrates these phenomena by theoretical and numerical examples as well as indicates their consequences for broad-band wireless communication over short distances

    U2 - 10.2528/PIER05051201

    DO - 10.2528/PIER05051201

    M3 - Article

    SP - 67

    EP - 80

    JO - Electromagnetic Waves

    JF - Electromagnetic Waves

    SN - 1070-4698

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