Authors: Aykut Cihangir, Fabien Ferrero, Gilles Jacquemod, Patrice Brachat, and Cyril Luxey
Source: FERMAT, Volume 3, Article 5, May_Jun, 2014
Abstract: A novel approach for antenna designs covering the LTE frequency bands in a mobile handheld terminal is proposed. The concept consists of a low-band antenna operating in the 700-960MHz band, associated with a high-band antenna operating from 1700 to 2700MHz. The two antennas are separately fed and exhibit high port-to-port isolation. The low-band antenna is of “coupling element” type, modified to be hollowed. The space made available inside this hollow coupling element is then used to insert another antenna operating in the higher frequency bands. The port-to-port isolation between the two antenna feeds is increased using both some antenna placement techniques and bandstop behaviors of matching networks in the frequency bands of interest. Two antenna prototypes are designed, manufactured and measured to validate the simulation results. The effect of the user is also investigated via S-parameter and total efficiency measurements.
Index Terms: Handset antennas, Antenna efficiency, Antenna input impedance, LTE frequency bands, User effect.
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Integration of Resonant and Non-Resonant Antennas for Coverage of 4G LTE Bands in Handheld Terminals