Seamless exploitation of cell‐phone antennas for near‐field WPT by a frequency‐diplexing approach
| Autor: | Diego Masotti, Francesco Berra, Alessandra Costanzo, Massimo Del Prete |
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| Přispěvatelé: | Del Prete, Massimo, Berra, Francesco, Costanzo, Alessandra, Masotti, Diego |
| Rok vydání: | 2017 |
| Předmět: |
Near-field WPT
SWIPT Computer science business.industry 020208 electrical & electronic engineering Electrical engineering 020206 networking & telecommunications 02 engineering and technology Near field communication law.invention Power (physics) Two-port network Rectifier Microstrip antenna law 0202 electrical engineering electronic engineering information engineering Maximum power transfer theorem Wireless Electrical and Electronic Engineering Antenna (radio) business |
| Zdroj: | IET Microwaves, Antennas & Propagation. 11:649-656 |
| ISSN: | 1751-8733 |
| DOI: | 10.1049/iet-map.2016.0281 |
| Popis: | This paper introduces a novel solution for portable devices to exploit their existing communication antennas for bi-directional near-field wireless re-charging, without compromising their far-field properties. To demonstrate the concept, the radio-frequencies (RF) 900/1800 MHz and 433 MHz are adopted for the far-field communication and for the near-field wireless recharging, respectively. First, a pair of faced, dual-band, printed monopoles is characterized as a two-port network over the bands of interest at several distances. Then, each antenna is fed by a frequency-selective three-port network, designed to simultaneously ensure data communication at the higher frequencies and wireless re-charging at the lower one. In this way, the combined far-field and near-field operations of the resulting four-port network can be optimized. A proof-of-concept prototype has been characterized, showing ports isolation higher than 20 dB and RF-to-RF power transfer efficiency between 15% and 40% for variable faced antennas distance. When a rectifier is connected to the receiving power port, the measured RF-to-dc link efficiency varies between 9% and 20%, with portable devices located 1 and 2 centimeters apart, and the transmitted power is 10 dBm. The simultaneous high frequency communication is verified with slightly reduced performance. |
| Databáze: | OpenAIRE |
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