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Cavity Resonator
Posted 17.09.2013, 02:23 GMT-4 3 Replies
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I try to simulate a simple case of rectangular cavity resonator. I've found the resonance frequency analyticaly and by using eigenfrequency method that is published in COMSOL model gallery (Model ID: 9618). But when I try to simulate spectral response, I get a strange result:
I use rectangular port BC with TM mode, mode number: 11
1. I get "peak" instead of "dip"
2. At frequencies that are higher than resonance frequency (in agreement with my prev. calcs), I get no response (attached an image)
I use COMSOL 4.2a
Does anybody have any idea what might be the problem?
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Hello Gary Zaiats
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I'm doing a transducer with a resonance cavity. May I ask you how did you get the resonance frequency(or eigenfrequency ) of the cavity please ?I can't get the result by comsol. thank you in advance!
David Cao
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For a simple rectangular resonator, there's an analytical expression (for example here: wcchew.ece.illinois.edu/chew/ece350/ee350-23.pdf). In my case, I found a very good agreement between COMSOL eigenfrequency (Model ID: 9618) solution to the analytical solution
Bye,
Gary
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Thank you for your help! I will do the research of it.
David