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An efficient fractal rectenna for RF energy harvest at 2.45 GHz ISM band
Author(s) -
Shi Yanyan,
Fan Yue,
Jing Jianwei,
Yang Lan,
Li Yan,
Wang Meng
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21424
Subject(s) - rectenna , ism band , ground plane , radio frequency , antenna (radio) , stub (electronics) , omnidirectional antenna , energy conversion efficiency , rf power amplifier , electrical engineering , physics , fractal , fractal antenna , dbm , voltage , antenna efficiency , optoelectronics , rectification , engineering , mathematics , cmos , amplifier , mathematical analysis
A novel efficient rectenna is proposed in this paper for radio frequency (RF) energy harvest from ambience at 2.45 GHz ISM band. A compact fractal antenna is designed based on a Lévy C curve. The performance of antenna with the ground plane of the conventional geometry, the rectangular‐slot geometry and the newly designed geometry is investigated and compared. Besides, a typical rectifier with a 73‐degree radial stub matching network is presented. Simulation and experiment are performed to validate the performance of the presented rectenna. The results indicate that the antenna is characterized with a good matching characteristic with a stable omnidirectional radiation pattern. The rectifier has a relatively high efficiency of 30% under the low input power of −10 dBm. The measured maximum RF to DC conversion efficiency of the rectenna is 70% with the output voltage of 2.2 V at 0 dBm when the input power ranging from −20 dBm to 0 dBm.
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