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Coil Ressonances

 
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gmask
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Joined: 03 Aug 2010
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PostPosted: Thu Dec 16, 2010 11:26 pm    Post subject: Coil Ressonances Reply with quote

We have two spiral antennas working at 2-18 GHz. We attempted to measure the ressonances of a steel coil (4 mm diameter and 10 mm length) in transmission mode and we actually saw them as sharp absroption peaks.

However I can't manage to find a theoretical model that predicts the position of such ressonances.

My question is, given a coil of diameter D, length l and n turns/unit length, what are the ressonances I should expect?

I tried to figure this out through circuit theory, but it seems that an LRC circuit only shows one ressonance... (why?)

Thanks in advance for your help!
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