What is an exact equation for resonance frequency of the annular slot ring antenna?

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Teja Sankar

http://digital-library.theiet.org/content/journals/10.1049/ip-h-1.1984.0020

go through this paper you will find your answer in references.

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DEAR SAJEED

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Sajeed Mulla

Thanks Teja sankar

To Mohammad Arinal

thanks for information sharing

but Could not download the paper

plz send the correct link