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).

RESULTSThis section shows two multiband antenna designs: one uses a standard PCB while the other uses a FracPlane tuned PCB [1]. The purpose is to demonstrate that the tuned-PCB design is useful to obtain broadband behaviour at low frequencies. This is of special interest, given than a known limitation for handset antennas is usually the narrow-band of PIFA antennas at low bands, such as GSM850. Therefore, two PIFA concepts are designed and their behaviour compared to observe the benefits of the tuned-PCB approach.29 0-7803-9444-5/06/$20.00

A technique consisting in designing the groundplane of a handset antenna is presented. The technique is applied to PIFA antennas to show how the bandwidth can be enhanced. Particularly, a dual-band PIFA operating at GSM900MHz and GSM1800MHz is expanded up to quad-band and hexa-band operation by means of groundplane design. Results for antenna efficiency show that the proposed technique can be applied to design multi-band antennas for handset phones.

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.