Hello
I want to make a resonant magnetic loop of 30 cm in circumference, I have a few questions:
1* do i need to cut more than 30 cm in wire in order to compensate for the edges of the loop (which need to be implanted in a circuit board)?
2* does the loop's shape have to be perfectly circular? because i don't have the right tools to do that, is that going to affect the theoretical resonance frequency of the loop?
3* I want to use a gimmick capacitor as a tuning one because i don't have a variable capacitor, so i am planning to attach two enamel wires to the loop and then twist them together searching for the resonance frequency, the problem is i might be getting away from the RF instead of getting closer, any suggestions on how to both increase and decrease capacitance to tune the loop?
4* how do i know the range of the frequency that the tuning capacitor need to scan through ito reach the desired resonance frequency?
I already tried to make the loop but it wasn't resonant at the calculated theoretical frequency, here it is:
The characteristics:
loop diameter: 10 cm
wire diameter: 1 mm
inductance: 2.94E-7 H
it is in parallel with a capacitor of C = 50 micro Farads
which makes a resonance frequency of 41093.62 Hz
This project is aimed at increasing the distance of wireless power transfer using passive resonant circuits.
Thank you in advance.
I want to make a resonant magnetic loop of 30 cm in circumference, I have a few questions:
1* do i need to cut more than 30 cm in wire in order to compensate for the edges of the loop (which need to be implanted in a circuit board)?
2* does the loop's shape have to be perfectly circular? because i don't have the right tools to do that, is that going to affect the theoretical resonance frequency of the loop?
3* I want to use a gimmick capacitor as a tuning one because i don't have a variable capacitor, so i am planning to attach two enamel wires to the loop and then twist them together searching for the resonance frequency, the problem is i might be getting away from the RF instead of getting closer, any suggestions on how to both increase and decrease capacitance to tune the loop?
4* how do i know the range of the frequency that the tuning capacitor need to scan through ito reach the desired resonance frequency?
I already tried to make the loop but it wasn't resonant at the calculated theoretical frequency, here it is:
The characteristics:
loop diameter: 10 cm
wire diameter: 1 mm
inductance: 2.94E-7 H
it is in parallel with a capacitor of C = 50 micro Farads
which makes a resonance frequency of 41093.62 Hz
This project is aimed at increasing the distance of wireless power transfer using passive resonant circuits.
Thank you in advance.