Inbuilt multiband Microstrip antenna for portable devices

Abstract

With the recent introduction of the long term evolution (LTE) operation of mobile broadband services, the mobile devices like Smartphones, laptop computers and tablet computers are expected to meet the required bandwidths allocated for LTE/GSM/UMTS, GPS and WWAN applications. The proposed printed diamond-shaped-patch (DSP) antenna has the capability to provide multiband operation. To create this antenna, several narrow strips acting as resonance paths can be integrated with the DSP antenna. By changing the length of the added resonant strips in the notched region, the center frequency of the multi resonances below the UWB frequency can be fine tuned. This antenna is designed to merge multiple operating bands of at least 850MHz, 1.5, 2.4, 3.1 - 10.6 GHz with a return loss better than 6 dB thereby avoiding usage of multiple antennas.Proposed antenna is planner and will be printed on both the sides of FR4 substrate which adds compactness to antenna that can be embedded easily in any portable devices such as the Smartphones, laptop computers and tablet computers. © Springer International Publishing Switzerland 2014.