Ansys Convergence Webinar Series: Electromagnetics - Roke Manor Research Ltd.
Modeling Touch Screens
Robin Granger, Roke Manor Research Ltd
Many of today's handheld wireless devices feature touch-sensitive displays. Such screens typically incorporate thin films of a resistive material called indium tin oxide, which can cause considerable RF losses resulting in poor antenna efficiency — a factor that is rarely reported in literature. The impedance boundary feature of Ansys HFSS has been used successfully to model this effect, permitting rapid evaluation of alternative designs. Results of simulations and measurements of a real wireless device are presented.