Antenna Behaviour in the Presence of Human Body

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    Abstract

    Mobile phones are widely used nowadays. The demand in the new generations of mobile phones is better performance. Typically the mobile phone performance is derived assuming an ideal antenna impedance of 50Ω. Some work has been done in understanding the behaviour of the antenna impedance in a real environment [1], [2], [3]. This work continued the exploration of the difference between the ideal antenna impedance and the antenna impedance in a real environment. In particular the analysis was carried out measuring the antenna impedance in presence of the human body and relating it to the position of the hand and of the hand + head. Two types of antennas were considered: PIFA antennas and ceramic antennas. Several positions of the hand and of the hand + head were considered. These positions were selected after an accurate study about how people on the street normally handle their mobile phones. The study consisted of two steps: 1) observation of the typical positions of the hand and of the hand + head with respect to the mobile phone; 2) their imitation in the lab for the measurements The outcome of the investigation was the changing of the impedance is primary due to a changing of its imaginary part. The real part is affected but not in dramatic way.
    Original languageUndefined
    Title of host publicationthe 15th ProRisc workshop on Circuits, Systems and Signal Processing (ProRisc 2004)
    Place of PublicationUtrecht
    PublisherSTW
    Pages487-490
    Number of pages4
    ISBN (Print)90-73461-43-X
    Publication statusPublished - Nov 2004
    Event15th Annual Workshop on Circuits, Systems and Signal Processing, ProRisc 2004 - Veldhoven, Netherlands
    Duration: 25 Nov 200426 Nov 2004
    Conference number: 15

    Publication series

    Name
    PublisherSTW Technology Foundation

    Conference

    Conference15th Annual Workshop on Circuits, Systems and Signal Processing, ProRisc 2004
    Abbreviated titleProRisc
    CountryNetherlands
    CityVeldhoven
    Period25/11/0426/11/04

    Keywords

    • METIS-219827
    • human body interaction
    • mobile phone performance
    • antenna retuning
    • Antenna behaviour
    • EWI-14494
    • IR-48402

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