why multiple modes in rectangular cavity when it is coupling?
Posted Feb 12, 2020, 5:14 AM EST 1 Reply
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When i am performing a simulation of 1 cm radius cylindrical cavity with comsol multiphysics, the obtained frequency eigen value for TM010 mode is 11.47GHz. But when I am adding the coupling structures ( coaxial cable) it get excited at two modes, one mode is around 10 GHz and other mode is around 12GHz.
Why this is happening?
simulation results are attached here: simulation results