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In this paper, the user effects on mobile terminal antennas at 28 GHz are statistically investigated with the parameters of body loss, coverage efficiency, and power in the shadow. The data are obtained from the measurements of 12 users in data and talk modes, with the antenna placed on the top and bottom of the chassis. In the measurements, the users hold the phone naturally. The radiation patterns...
In this paper, we present three cellular antenna designs for the smart watch application by using the metal watch belt. Our proposed antennas can cover cellular bands down to 700 MHz and up to 2.7GHz. Their performance in the free space and user cases are measured and discussed. The SAR evaluation guideline from FCC is also introduced and SAR measurement results are shown
This paper mainly focuses on the investigation of the body loss of beamforming mode in LTE MIMO mobile terminals with CTIA user effects. The research of the body loss and radiation efficiency is carried out over different phase differences between two ports of each MIMO antenna. During studies, four kinds of typical LTE MIMO antennas are used, namely, collocated ground free (GF), parallel GF, parallel...
This paper reports a study of body loss for LTE MIMO antennas in mobile phones with the effects of different mobile phone lengths. Two designs of dual elements MIMO antenna (dual Semi PIFA and co-located antenna) are studied under two typical LTE and mobile phone frequency points (0.85GHz and 1.9 GHz) with three mobile phone lengths (110mm, 130mm and 150mm). And the performance of correlation and...
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