TY - JOUR
T1 - Dual-Band Defected Ground Structures Wireless Power Transfer System With Independent External and Inter-Resonator Coupling
AU - Tahar, Fairus
AU - Barakat, Adel
AU - Saad, Redzuan
AU - Yoshitomi, Kuniaki
AU - Pokharel, Ramesh K.
N1 - Funding Information:
Manuscript received May 10, 2017; revised July 26, 2017; accepted August 9, 2017. Date of publication August 15, 2017; date of current version November 22, 2017. This work was supported in part by the Grant-in-Aid for Scientific Research (C) under Grant 16K06301, and in part by VLSI Design and Education Center (VDEC), University of Tokyo in collaboration with Keysight Corporation. This brief was recommended by Associate Editor A. Apsel. (Corresponding author: Adel Barakat.) F. Tahar, R. Saad, K. Yoshitomi, and R. K. Pokharel are with the Faculty of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan (e-mail: 3IE16608P@ed.kyushu-u.ac.jp; redzuansaad@gmail.com; yoshitomi@ed.kyushu-u.ac.jp; pokharel@ed.kyushu-u.ac.jp).
PY - 2017/12
Y1 - 2017/12
N2 - This brief proposes a design methodology based on the admittance (J-) inverters for a dual-band wireless power transfer (WPT) system that employs two cascaded circulars defected ground structure (DGS) resonators with different capacitive loading to guarantee distinct resonances. A single microstrip line excites the two DGSs, and when two DGS resonators are coupled back to back, it transforms to a dual band pass filter leading to WPT at both bands. Each of the DGS resonators has independent coupling. Thus, the realized J-Inverters are designed independently. Also, we employ a single stub for the matching. This stub appears with a different length according to the operating frequency; hence, an independent external coupling is achieved at both frequencies. A compact size of 30 mm × 15 mm is fabricated achieving a WPT efficiency of more than 71% at a power transfer distance of 16 mm for both bands (0.3 and 0.7 GHz).
AB - This brief proposes a design methodology based on the admittance (J-) inverters for a dual-band wireless power transfer (WPT) system that employs two cascaded circulars defected ground structure (DGS) resonators with different capacitive loading to guarantee distinct resonances. A single microstrip line excites the two DGSs, and when two DGS resonators are coupled back to back, it transforms to a dual band pass filter leading to WPT at both bands. Each of the DGS resonators has independent coupling. Thus, the realized J-Inverters are designed independently. Also, we employ a single stub for the matching. This stub appears with a different length according to the operating frequency; hence, an independent external coupling is achieved at both frequencies. A compact size of 30 mm × 15 mm is fabricated achieving a WPT efficiency of more than 71% at a power transfer distance of 16 mm for both bands (0.3 and 0.7 GHz).
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U2 - 10.1109/TCSII.2017.2740401
DO - 10.1109/TCSII.2017.2740401
M3 - Article
AN - SCOPUS:85028471300
SN - 1549-7747
VL - 64
SP - 1372
EP - 1376
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 12
M1 - 8010857
ER -