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Sensors and Materials,
Volume 30, Number 3(2) (2018)
Copyright(C) MYU K.K. All Rights Reserved.
Published: March 23, 2018
Triple-band Slot Antenna Array for Energy Harvesting for Wireless Sensor Networks [PDF]
Wen-Shan Chen, Chien-Min Cheng, Bo-Yu Liao, Yao-Lin Chang, and Hsin-Yu Wang
(Received November 15, 2017; Accepted December 19, 2017)
Keywords: slot antenna, antenna array, energy harvesting, triple-band, wireless sensor networks
An energy harvesting antenna array for wireless sensor applications is presented in this paper. The microstrip line feeding network excites four slots to achieve wireless local-areanetwork (WLAN) 2.4/5.2/5.8 (2.4–2.484/5.15–5.325/5.725–5.825 GHz) bands. The design is printed on a flame retardant 4 (FR4) substrate with thickness of 1.6 mm, permittivity of 4.4, and loss tangent of 0.0245. The overall size of the antenna array is only 60 × 60 × 1.6 mm3 and, with dual-ports, consists of two antenna arrays; port 1 is designed for a WLAN 2.4 GHz band and port 2 is designed for a WLAN 5.2/5.8 GHz band. The feeding network (electric length = λg/4) was used to connect the array network and antenna, and for the purpose of in phase excitation, we used microstrip lines (electric length = λg/2) to adjust the phase difference of these two antenna elements to 180°. Finally, 8 mm above the antenna array, we placed a metal reflector the same size as the antenna to adjust the radiation patterns to the −y direction and to enhance the radiation directivity and gains.
Corresponding author: Chien-Min Cheng
Cite this article
Wen-Shan Chen, Chien-Min Cheng, Bo-Yu Liao, Yao-Lin Chang, and Hsin-Yu Wang, Triple-band Slot Antenna Array for Energy Harvesting for Wireless Sensor Networks, Sens. Mater., Vol. 30, No. 3, 2018, p. 587-594.
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