# Design a magnetic based coil using FEKO

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Hi

Good day,

I would like to start with creating two different magnetic based coils as Transmitting coil (TC) and Receiving coil (RC), to measure the Z impedance values changes with respect to the movement of TC around RC.

Following are the configuration which I would like to proceed,

Transmitting Coil:

 L 67 uH Q 22 Ccalc 24.19 nf - - F 125khz

Receiving Coil:

 Coil Configuration L 728.73 uH Q 53.24 R 15kohm Ccalc 2.224nf F 125khz - -

The Receiving Coil (RC) resonated at a frequency of 125kHz and diameter of 7cm. Transmitting coil (TC) dimension is 9 x 9 x 9 mm^3.

Initially, the RC and TC will be 3cm away from each other on z axis. The Impedance( |Z| )  value can be measured with respect to the movement of TC on x-axis/y-axis.

-> The RC: loop antenna actual dimension, the copper wire diameter, number of turn, the diameter. (the details of the coil determine the inductance value)

For RC:
0.236mm diameter (34 swg) Enamelled Cu wire.
Diameter Antenna: 7cm internal ,
Number of turns: 67 turns
Inductance: 700uH
Quality Factor (Q): 17

For TC:
Inductance: 67 uH
Quality Factor (Q): 22
Capacitor: 24.19 nf
Frequency (F)    125 kHz
Number of turns: 52
Diameter: 8mm

-> Matching circuit details.

Matching circuit For RC : C = 2.3159nF  (Formula:F=1/2π √LC)
Matching circuit For TC : C= 24.19nF    (Formula:F=1/2π √LC)

kindly can you suggest me the step or user manual for me to start on to this project.

Regards

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