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The paper presents the investigation of wave propagation characteristics for indoor wireless communication using smart mobile terminal antenna. The finite element method (FEM) frequency domain based computation model is used to characterize electric field intensity for a typical office environment. The signal to noise ratio and signal strength are measured according to different placements of transmitting antennas including conventional antenna and smart mobile terminal antenna array. To validate the numerical computation result, measurement result using a wireless network card with an on board antenna and signal strength measurement software are employed to replace expensive and heavy apparatus.