Abstract
The emerging trend for handset antenna design puts strong constraints on their volume occupation and user's proximity resilience. Several PIFA antenna configurations are investigated, studying the influence of substrate/superstrate dielectric loading on both absorption and mismatch loss at 900 MHz. By using high-permittivity materials and by leaving a small clearance area between the PIFA top plate and the back of the handset, both absorption and mismatch loss can be reduced at the expense of a narrower bandwidth.
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