Open AccessPerformance analysis of a flexible polyimide based device for displacement sensing
Author(s) -
Milica Kisić,
Nelu Blaž,
Kalman Babković,
Andrea Marić,
Goran Radosavljević,
Ljiljana Živanov,
Mirjana Damnjanović
Publication year - 2015
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee1502287k
Subject(s) - polyimide , materials science , ferrite (magnet) , fabrication , electromagnetic coil , foil method , printed circuit board , displacement (psychology) , optoelectronics , ferrite core , inductance , composite material , electrical engineering , electronic engineering , engineering , layer (electronics) , medicine , psychology , alternative medicine , pathology , voltage , psychotherapist
In this work, two variations of the displacement sensor, based on the heterogeneous integration process of traditional fabrication technologies PCB (Printed Circuit Board) and LTCC (Low Temperature Co-fired Technology) with a flexible polyimide foil are presented. The proposed sensor uses the coil as an essential part, spacer and a polyimide foil as a flexible membrane with a piece of ferrite attached to it. With the displacement of the polyimide foil, the ferrite gets closer to the coil causing an increase in its inductance and a decrease of the resonant frequency of the system (coil, ferrite and antenna). Simulation results showed that sensors with equal outer dimensions but different internal structures exhibit different performances. Two prototypes of the sensor with different ferrite dimensions are designed, fabricated and characterized. Finally, their performances are compared.