In this paper we propose an application of microstrip line for a singl
e-turn pickup Foil in the thin-film permeance meters. This coil has tw
o electric ports with one terminated into 50 Ohm. It is free from LC r
esonance up to a few GHz because the microstrip line does not resonate
s and because the stray capacitance between the pickup coil and the dr
iving 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 po
tential to measure thin-film permeances over the wide range from 1 MHz
up to a few GHz.