Quad-band Multiple Input Multiple Output Modified PIFA Antenna for WLAN and LTE Mobile Applications

In this article, a multiple input multiple output quadrate frequency bands modified PIFA antenna is introduced for 4G LTE and WLAN applications. The quadrate proposed antenna covers LTE 1800 (1.71-1.88 GHz), LTE 1900 (1.85-1.99 GHz), UMTS (1.92-2.17 GHz), LTE 2300 (2.305-2.400 GHz), LTE 2500(2.50-2.69 GHz), WLAN (2.400-2.484 GHz- 5.15-5.75 GHz) specified by IEEE 802.11a/b/g/n/ac and WiMAX (3.3–3.6 GHz). Then, the PIFA antenna is used as 2×1 MIMO antenna as a radiation element.  The overall dimensions of the single antenna are 50×35×0.8 mm3</sup> and the MIMO antenna is 50×70×0.8 mm3</sup> while both are realized on FR4-epoxy substrate. To reduce mutual coupling between PIFA antennas at MIMO configuration, Defected Ground Structure (DGS) along with parasitic double split ring resonator is used. The antenna performance is confirmed by the construction of the antenna prototype and measuring its characteristics in terms of reflection loss coefficient, gain, and radiation properties. The extracted outcomes show a good correlation between the simulation and experimental results that candidate it to satisfy mobile communication requirements.