Question about resonant frequency

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Hi

Can you explain why the number of resonance frequency in SRR(split-ring resonator) more than a Ring without a slot?

Thanks in advance
 

If you speak about a circular SRR with a inner ring, then the resonance frequency of the SRR structure behaves as the resonance frequency of an LC circuit, where L is given by the length and width of the line, and total C is given by the two gaps capacitance.
Compared to a simple ring resonator, the circular SRR resonance frequency is affected by the external radius, by the gaps distance, and by the angle of rotation of the inner ring.
 
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