Innovative antenna systems for efficient microwave power collectio

Franceschetti, Giorgio; Massa, Andrea; Rocca, Paolo

doi:10.1109/imws.2011.5877080

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…A series of theoretical and experimental results about MWPT systems with the microstrip patch antenna arrays were conducted [15]. Also, 2 of 12 many various methods have been employed to increase the power transfer efficiency (PTE), performances, and robustness of the MWPT systems by designing transmitting arrays [16][17][18][19]. A MWPT system operating at the frequency of 5.8 GHz by using an 8 × 8 transmitting antenna array and a 4 × 4 receiving antenna array was presented, and the PTE of the system was 33.4% at the distance of 40 cm [20].…”

Section: Introductionmentioning

confidence: 99%

Microwave Wireless Power Transfer System Based on a Frequency Reconfigurable Microstrip Patch Antenna Array

et al. 2021

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The microwave wireless power transfer (MWPT) technology has found a variety of applications in consumer electronics, medical implants and sensor networks. Here, instead of a magnetic resonant coupling wireless power transfer (MRCWPT) system, a novel MWPT system based on a frequency reconfigurable (covering the S-band and C-band) microstrip patch antenna array is proposed for the first time. By switching the bias voltage-dependent capacitance value of the varactor diode between the larger main microstrip patch and the smaller side microstrip patch, the working frequency band of the MWPT system can be switched between the S-band and the C-band. Specifically, the operated frequencies of the antenna array vary continuously within a wide range from 3.41 to 3.96 GHz and 5.7 to 6.3 GHz. For the adjustable range of frequencies, the return loss of the antenna array is less than −15 dB at the resonant frequency. The gain of the frequency reconfigurable antenna array is above 6 dBi at different working frequencies. Simulation results verified by experimental results have shown that power transfer efficiency (PTE) of the MWPT system stays above 20% at different frequencies. Also, when the antenna array works at the resonant frequency of 3.64 GHz, the PTE of the MWPT system is 25%, 20.5%, and 10.3% at the distances of 20 mm, 40 mm, and 80 mm, respectively. The MWPT system can be used to power the receiver at different frequencies, which has great application prospects and market demand opportunities.

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