Feasibility of a triple mode, low SAR material coated antenna for mobile handsets

It has been previously established that material loaded monopoles having equal permittivity and permeability values, give increased bandwidth and radiation efficiency for a given size reduction. Very low Specific Absorption Rates (SAR) have been obtained by orthogonally positioning the antenna towards the head. Recent results obtained from a TLM simulator indicate the antenna’s capability to operate in dual mode. In this present paper various designs are researched, in order to preserve and translate the antenna features into a more compact embedded version. A final design solution is presented with the addition of metal strips, confirming the realisation of a small, triple-band, low-SAR handset antenna.