I have a loop antenna.
When I connect the probe from my oscilloscope, does the probe also act as an antenna? If so, how should I fix that? I read about feeding technique, but I still do not understand it clearly.
Is it okay that I cover my antenna with scotch tape? Is this a correct way of "shielding antenna"?
I want to test the magnetic direction finding method and the source of the signal is an electric spark. I read that loop antenna is suitable for this. I find a loop antenna in my lab and this is the specification I figured
- Turn : 10 turns
- Loop diameter : 11.6 cm
- wire diameter : around 0.08 mm
- length of winding : 0.9 cm
- frequency : ?
I dont know how to calculate the inductance and capacitance for this circular loop antenna, ir how to measure it with tools in my lab, so I don't know its resonance frequency yet. But, I already test it with dc spark generator (pictured) and yes it detects something when the spark occurred. But, I am not sure about the frequency shown on the oscilloscope (around 130 kHz), and also about my question above.
So moving from this, I decided that I want to make my own square loop antenna, mainly because I already found the legit equation/formula on the book and internet for the inductance and capacitance, so I can calculate the resonance frequency.
About feeding the antenna: is it critical for any regular loop? Or at least in my case? I read that feeding antenna technique is connecting and transforming the radio signal into electrical signal (or vice versa); since I use an oscilloscope, is it balanced already? I only made the end of the loop on the bottom, so I suppose it is symmetric. and I cover all of the surface with scotch tape on top of it.
Note: Even if this experiment fails, I still need something to write about in the project report.