Miniature magnetic resonance coils for wide wireless power transfer applications

Author

In-Kui Cho ; Seong-Min Kim ; Jeong-Ik Moon ; Jae-Hun Yoon ; Woo-Jin Byun ; Hyung-Do Choi

Author_Institution

Radio & Broadcasting Res. Div., ETRI, Daejeon, South Korea

fYear

2014

fDate

16-19 Nov. 2014

Firstpage

1

Lastpage

3

Abstract

A simple miniature magnetic resonance coil for wide wireless power transfer applications is presented. The proposed resonance coils are derived from a new two layered spiral structure designed through the analysis of input impedance, transmission coefficient and direction of coil current. The measured resonance frequency and efficiency are 1.8 MHz and 82.5% at normalized distance 0.68(20.4 cm) and the diameter size of the spiral coil is 30 cm (1.8λ/1000). Their performance is compared with previously reported result of helical and spiral coils.

Keywords

coils; inductive power transmission; magnetic resonance; coil current direction; helical coils; input impedance analysis; miniature magnetic resonance coils; resonance frequency; spiral coils; transmission coefficient; two layered spiral structure; wide wireless power transfer applications; Coils; Frequency measurement; Inductance; Magnetic resonance; Spirals; Wireless communication; Frequency separation; Magnetic resonance; Resonance coil; Wireless power transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Measurements & Applications (CAMA), 2014 IEEE Conference on

Conference_Location

Antibes Juan-les-Pins

Type

conf

DOI

10.1109/CAMA.2014.7003365

Filename

7003365