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Design of frequency sensor based on reconfigurable rectenna
Author(s) -
Tsai JiaFu,
Row JeenSheen
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28440
Subject(s) - rectenna , microwave , electrical engineering , rectifier (neural networks) , bandwidth (computing) , energy conversion efficiency , electronic engineering , resistive touchscreen , antenna (radio) , engineering , radio frequency , microstrip , reconfigurable antenna , microstrip antenna , computer science , voltage , telecommunications , antenna efficiency , stochastic neural network , machine learning , recurrent neural network , artificial neural network , rectification
A simple design for solar powered frequency sensors is presented. The design is based on a rectenna composed of a frequency reconfigurable microstrip antenna, a rectifying circuit, and a low pass filter. The operating frequency of the antenna can be tuned in the range between 2 and 2.8 GHz, and, in this frequency range, the rectifier can effectively perform the conversion from RF to DC. By the measured results of the rectenna, the average conversion efficiency within the operating bandwidth of 33% is 73% over a resistive load of 1 kΩ at a power density of about 0.8 mW/cm 2 . A frequency sensor is successfully implemented by integrating the frequency reconfigurable rectenna with a preprogrammed microprocessor powered by solar cells. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1739–1742, 2014