A new microstrip pickup coil for thin-film permeance meters

Author

Kawazu, T. ; Yamaguchi, M. ; Arai, K.I.

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4641

Lastpage

4643

Abstract

In this paper we propose an application of microstrip line for a single-turn pickup coil in the thin-film permeance meters. This coil has two electric ports with one terminated into 50 Ω. It is free from LC resonance up to a few GHz because the microstrip line does not resonates and because the stray capacitance between the pickup coil and the driving sheets is small as compared with the conventional figure-8 coil. We measured the thin film permeance up to 700 MHz which is the upper frequency limit of the driving sheets used. The proposed coil has a potential to measure thin-film permeances over the wide range from 1 MHz up to a few GHz

Keywords

coils; electric sensing devices; magnetic permeability measurement; magnetic thin films; microstrip components; 1 MHz to 3 GHz; 50 ohm; 700 MHz; LC resonance; driving sheets; equivalent circuit; figure-8 coil; frequency characteristics; magnetic recording heads; microstrip line; microstrip pickup coil; single-turn pickup coil; thin film permeance; thin-film permeance meters; Capacitance; Coils; Equivalent circuits; Frequency measurement; Leg; Magnetic field measurement; Microstrip; Permeability; Resonance; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334176

Filename

334176