Urgent Q-factor !!!!!!!!!!!!!!

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MrElec

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Hello ;

It's very urgent for all members, i need your help about this resonator::?:

1-What's the role of the gap at the endings of the CRLH TL as shown in figure?if it represents a capacitor, how can we find it's value?.



2-How to determine the Q-factor using only S-parameters simulations were done by ADS Momentum?.



I want to exchange ideas with others working on Metamaterials for Microwave engineering using Composite Right/Left Handed Transmission Line Networks (Applications:2D and 3D CRLH TL,Leaky-wave and resonant Antennas,Power dividers,filters,...)
thanks

Added after 6 minutes:

Hello;

Excuse me i've forgotten to post the article ,here it is:
 

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