Abstract
ABSTRACTFour element (2 × 2) planar multi-input multi-output (MIMO) antenna design is proposed for long-term evolution applications for operating bands 1 and 4. The design combines 180° phase reversed and phase rotated antenna elements. Presented design integrates the effect of pattern and space diversity techniques for common return-losses and isolations at different (or between) ports. The fabricated antenna utilizes the space of 68 × 98 mm2 on low cost FR-4 dielectric substrate. The proposed design with VSWR of <2 exhibits −10 dB impedance bandwidth in the range of 1.66–2.17 GHz. More than 10 dB of isolation among all the radiating elements of MIMO is recorded in simulation and measured cases. The measured peak gain in considered frequency spectrum is better than 2.5 dBi. The diversity performance explores the effect of peak gain, envelope correlation coefficient (ECC), mean effective gain, and directivity on the presented design.
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