Interesting coupling logic of feeding network resonator

Thread starter yefj
Start date Jan 21, 2025
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Coupling Network Resonator

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yefj

Thread starter
Jan 21, 2025

Hello,I have built a resonator which consists from 64 gap coupled small resonators. I have 4 resonances 5.7Ghz (the strongest coupling) 6.25Ghz 6.78Ghz 7.172Ghz as shown below . the coupling of the resonances getting smaller as the frequency rises. Is there a way to increase the coupling on the 6.78Ghz resonance?
Thanks.

Layout of a planar resonator in yellow on a cyan background, showing a central block of closely spaced parallel thin strips with tapered yellow feed structures extending above and below.

Layout of a meander-line resonator made of many parallel gap-coupled slot sections in yellow on a cyan ground, with red arrows marking the feed points on the left and a u, v, x axis marker on the right.

CST simulation screenshot of h-field magnitude at 5.7 GHz, plotted on a blue-to-red colour scale, showing a dense rectangular array of narrow vertical resonator strips at the centre with curved feed lines extending to top and bottom.

Simulated h-field magnitude plot at 6.256 GHz on a cross-section plane, with a colour scale from blue (low) to red (high), showing strong red fields concentrated in three adjacent cells in the centre.

CST simulation plot of the absolute H-field at 6.78 GHz, showing a blue background with a central cluster of red and yellow lobes, four red bands in a row, and surface current arrows around a rectangular outline.

Smith chart titled S-Parameters [Impedance View] showing a blue trace with four numbered markers at 5.7, 6.256, 6.78 and 7.172 GHz, with impedance values listed in the lower left.

Interesting coupling logic of feeding network resonator

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