Simultaneous lightwave information and power transfer (SLIPT) has been regarded as one of the enabling technologies to enhance the battery-life and data-rate for mobile electronics in the Internet of things (IoT). The existing SLIPT schemes face the challenge of achieving narrow beam transmission and mobile receiver positioning simultaneously. In this paper, we propose a simultaneous mobile information and power transfer (SMIPT) approach using the energy-concentrated resonant beam, which can realize self-alignment with the mobile receiver. To reveal the mobility mechanism of SMIPT, we present a geometric model of the mobile transmission channel and an analytical model of mobile energy and information transfer. Refraction is ignored in the geometric model and Fresnel/paraxial approximations are adopted in the above analytical model. Numerical evaluation illustrates that the exemplary SMIPT system can deliver 5 W charging power and enable 9.5 bps/Hz spectral efficiency with the moving range of 40-degree field of view (FOV) over 3 m distance. Thus, SMIPT exhibits a viable solution of simultaneous narrow beam transmission and mobile receiver positioning for high-power and high-rate SLIPT.
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Manuscript received October 20, 2020; revised March 16, 2021; accepted April 26, 2021. Date of publication May 7, 2021; date of current version May 26, 2021. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Youngchul Sung. The work was supported in part by the National Key R&D Program of China under Grants 2020YFB2103900 and 2020YFB2103902, and in part by the National Natural Science Foundation of China under Grants 61771344 and 62071334. (Corresponding authors: Qingwen Liu; Hao Deng.) Mingqing Liu, Qingwen Liu, Jie Zhou, and Mingliang Xiong are with the College of Electronics and Information Engineering, Tongji University, Shanghai 201804, People’s Republic of China (e-mail: email@example.com; firstname.lastname@example.org; email@example.com; firstname.lastname@example.org).
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- Simultaneous mobile information and power transfer
- mobility and self-alignment
- retro-reflective resonator
- wireless power transfer