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Thanks for your reply. I made the following model in COMSOL.
It shows at the resonance frequency, |S11| is minimum while |S21| is maximum. It seems the energy will transmit (leave) the cavity?
Thanks for you explanation. I guess I misunderstood the concept. When I want to evaluate the reflection coefficient at interface between region I and II, it seems I need to consider the region II and III as a while but not only the region II.
The equivalent circuit might like this.
So if the...
Thanks for you explanation. I guess I misunderstood the concept. When I want to evaluate the reflection coefficient at interface between region I and II, it seems I need to consider the region II and III as a while but not only the region II.
The equivalent circuit might like this.
So if the...
Thanks. I am asking about Γ. I can image Γ = 0 when the impendence is perfectly matched. But I was told Γ = 0 when resonance occurred from a lecture. I want to consider a two-port device like this (a stepped discontinuity in a circular waveguide):
Hi,
I cannot explain why the reflection coefficient becomes zero when frequency is the resonant frequency of a microwave cavity resonator. Can you give me an explanation from the view of physics? Thanks.
Thanks for your reply. I checked the electric field at the cross section of the cavity when frequency is set to the left specific frequency. It looks like TM21 mode in the discontinuity region. This specific frequency is under the cutoff frequency of TM21 in the circular waveguide. I am not sure...
Thanks for your helpful reply. I agree with your point. There exist TM01 and TE11 mode in my sweeping frequency range as shown in fig 3. But I do no know why the reflection becomes large at some specific frequencies. It seems mode conversion is intensified at these points. Looking forward to...
Hello, I encountered such a problem: TM01 mode was excited to two circular waveguides. One has a full circular discontinuity and the other has a partial circular discontinuity shown in the figure 1. Results are shown in figure 2. The peak value correspond to the reflection from the discontinuity...
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