Triple-Band Near-Field Wireless Power Transfer System Using Coupled Defected Ground Structure Band Stop Filters

For the first time, a triple-band near-field wireless power transfer (WPT) system is presented using coupled triple-band defected ground structure (DGS) bandstop filters (BSF). A triple-band DGS-BSF is possible through creating a frequency dependent effective inductance, which appears with lower inductance at higher frequencies. When we couple two triple-band DGS-BSFs in a back-to-back configuration, a triple-band DGS-WPT system is created. We verify the proposed DGS-WPT system through good agreements between electromagnetic simulations and measurements. The measured WPT efficiencies are 68%, 60%, and 65% at 100.8 MHz, 140.7 MHz, and 182.2 MHz, respectively at a WPT separation distance of 30 mm. Each of the WPT transmitter and receiver has a size of 50 × 50 mm2.

[1]  Ramesh K. Pokharel,et al.  Design Approach for Efficient Wireless Power Transfer Systems During Lateral Misalignment , 2018, IEEE Transactions on Microwave Theory and Techniques.

[2]  Jun-Seok Park,et al.  A new DGS resonator and its application to bandpass filter design , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[3]  Steve Wicinski.  Code of Federal Regulations Search Form , 2014 .

[4]  Ramesh K. Pokharel,et al.  A Novel Technique for Compact Size Wireless Power Transfer Applications Using Defected Ground Structures , 2017, IEEE Transactions on Microwave Theory and Techniques.

[5]  Ken-Huang Lin,et al.  Enhanced Analysis and Design Method of Dual-Band Coil Module for Near-Field Wireless Power Transfer Systems , 2015, IEEE Transactions on Microwave Theory and Techniques.

[6]  Ramesh K. Pokharel,et al.  Compact Wireless Power Transfer System Using Defected Ground Bandstop Filters , 2016, IEEE Microwave and Wireless Components Letters.

[7]  Ken-Huang Lin,et al.  Dual-Band Coil Module With Repeaters for Diverse Wireless Power Transfer Applications , 2018, IEEE Transactions on Microwave Theory and Techniques.

[8]  Nuno Borges Carvalho,et al.  Maximizing DC power in energy harvesting circuits using multisine excitation , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[9]  Ramesh K. Pokharel,et al.  Design and Implementation of Dual-Mode Inductors for Dual-Band Wireless Power Transfer Systems , 2019, IEEE Transactions on Circuits and Systems II: Express Briefs.

[10]  Ramesh K. Pokharel,et al.  Dual-Band Defected Ground Structures Wireless Power Transfer System With Independent External and Inter-Resonator Coupling , 2017, IEEE Transactions on Circuits and Systems II: Express Briefs.