Title :
High frequency magnetic field sensing coil using microstrip line
Author :
Yamaguchi, M. ; Yabukami, S. ; Arai, K.I.
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
An analysis of a magnetic field sensing coil using a microstrip line is presented. A broad-bandwidth magnetic sensor is built in which the characteristic impedance is determined to be 50 Ω. We examined the coil size dependence for the output voltage and coil impedance as well as three dimensional ac field analysis. The output voltage of the coil is produced by a varying magnetic field linking the closed circuit loop which is composed of the microstrip conductor, a 50 Ω resistor, and the ground plane below radiation frequency. Eddy current generated in the ground plane decreases the output voltage of the microstrip coil. Optimum design depends on the trade off between impedance matching and increase in output voltage
Keywords :
UHF measurement; coils; eddy currents; impedance matching; magnetic field measurement; magnetic sensors; microstrip lines; microwave measurement; 50 ohm; broad-bandwidth magnetic sensor; characteristic impedance; closed circuit loop; coil impedance; coil size dependence; eddy current; ground plane; high frequency magnetic field sensing coil; impedance matching; microstrip conductor; microstrip line; optimum design; output voltage; resistor; three dimensional ac field analysis; Coils; Frequency; Impedance; Joining processes; Magnetic analysis; Magnetic circuits; Magnetic fields; Magnetic sensors; Microstrip; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
