Title :
Novel planar electromagnetic sensors - characterization and comparative evaluation
Author :
Gooneratne, C. ; Mukhopadhyay, S.C. ; Yamada, S.
Author_Institution :
Inst. of Inf. & Technol., Massey Univ., Palmerston North, New Zealand
Abstract :
In this paper, a new type planar sensor, interdigital type is investigated and compared with meander and mesh types. A controlled variable frequency power supply has been designed and developed for the supply of excitation voltage. The frequency can be controllable from a couple of 100 kHz to 1 GHz. The total frequency range has been obtained by switching different VCO´s of different frequency ranges. Tuning voltage versus operating frequency plot reveals a linear relationship which shows the ideal characteristics. Also, the output of the power amplifier is connected to all sensors and the effect of different materials in close proximity of sensors are observed. Results show that both meander and mesh type sensors respond very well to conducting and magnetic materials but not so well to dielectric materials. On the other hand the interdigital sensor responds well to dielectric materials.
Keywords :
electric potential; electric sensing devices; magnetic sensors; 100 kHz to 1 GHz; conducting material; controlled variable frequency power supply; dielectric material; excitation voltage; interdigital sensor; magnetic material; meander type sensor; mesh type sensor; operating frequency; planar electromagnetic sensors; power amplifier output; tuning voltage; Dielectric materials; Electric variables control; Frequency; Magnetic materials; Magnetic sensors; Power amplifiers; Power supplies; Sensor phenomena and characterization; Tuning; Voltage control;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463911
