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simple question: Connect feed to resonator cavity

Posted Oct 6, 2016, 4:46 a.m. EDT 1 Reply

Ashley MC Donald
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Hi! I'm new with comsol and I have a simple question: How can I connect the coaxial cable in figure with the resonator cavity?


Thanks
1 Reply Last Post Oct 6, 2016, 11:01 a.m. EDT
Dave Greve Certified Consultant
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Posted: 8 years ago Oct 6, 2016, 11:01 a.m. EDT
I don't see a coaxial cable in either of your images.

However in general- the ways to couple a coaxial cable to a cylindrical cavity can be found in one of the standard texts, for example, Ramo Whinnery and van Duzer. Often a short extension of the coaxial cable center conductor is inserted into the cavity.

In Comsol you probably need to put a port at the other end of the coaxial cable and then extract S parameters or impedance after doing the EM field calculation.

DW Greve
I don't see a coaxial cable in either of your images. However in general- the ways to couple a coaxial cable to a cylindrical cavity can be found in one of the standard texts, for example, Ramo Whinnery and van Duzer. Often a short extension of the coaxial cable center conductor is inserted into the cavity. In Comsol you probably need to put a port at the other end of the coaxial cable and then extract S parameters or impedance after doing the EM field calculation. DW Greve

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