Abstract-A handset antenna technique combining a parallel excitation of a PIFA and a slot is presented. The number of frequency bands is given by the sum of bands given per each radiator which can be controlled independently. Component interaction (battery, display, and speaker) is analyzed to determine the best place to mitigate performance degradation. Finally, a concept featuring a small footprint (39 11 mm 2 ) and low profile (2 mm) is proposed for multiband operation.Index Terms-Component interaction, handset antennas, multiband, planar inverted F antenna (PIFA), slot, specific absorption rate (SAR).

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Abstract-The technology of metallized foam offers a new approach to design wire-like, flat, and 3D antennas. Only the necessary metal skin depth (some microns in UHF band) is deposited over arbitrary shaped structures. Thanks to this technology, new antenna designs have been possible offering low weight, possible shaping, and innovative Corresponding author: J. Anguera (jaume.anguera@fractus.com).

A technique for the handset antenna field combining a PIFA and a slot in presented. The antenna concept features a small footprint and multi-band operation which is required for the new generation of thin profile handset phones.