How to calculate an air inductor ?

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diegolinder

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air inductor

I need use air inductor 0.033uHy. How to calculate this?
 

Re: air inductor

There are several air coil online calculators on the Internet. Here is one of them:

**broken link removed**

Using keywords 'air coil inductance calculator' will get several hits using Google for search.
 

Re: air inductor

For this small value you are better off copying a commercial model. **broken link removed** lists coils in this range. Just copy their number of turns and dimensions.
 

Re: air inductor

small value of inductance are often dominated by pin/lead lenght.

Identify the 2 nodes (or reference planes) where you have to place your inductor.

As rule of thumb, consider 1nH each millimeter of straight conductor.

Detract the inductance of the "distance" of the 2 nodes from the required one.
 

Re: air inductor


I want to make air core coil of 7nH, then, do you mean that in my case i will put it just a wire of 7mm length?! If so, what diameter of cupper wire should i use? and will it be straight or bridged? .. what are other specifications should i put into consideration...

Please clarify it to me,
Thanks,
Ahmad,
 

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