leeson feedback principle with two port resonator

[yefj]

Hello,In a two port resonator we have S11 minimal in resonanvce while S21 is maximal,at resonance phase is zero.
what do we do with the S11 as feedback?
what is the logic the the leeson mechanism?
Thanks.

https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/iet-map.2013.0380

https://www.iaeng.org/publication/IMECS2014/IMECS2014_pp733-740.pdf

 

[yefj]

Hello,I want to created the system.From the articles I see that we input noise to the amplifier then the noise gets amplified and we compare thefeedback from the output(s11) to the noise.
few questions:
1. where is the comparation of the feedback in the topology below.
I cant see here the feedback.
2. at resonance we have phase of 0,what is the effect of the feedback here?
Thanks.

 

[yefj]

Hello,I want to created th following system.From the articles I see that we input noise to the amplifier then the noise gets amplified and we compare thefeedback from the output(s11) to the noise.
few questions:
1. where is the comparation of the feedback in the topology below.
I cant see here the feedback.
2. at resonance we have phase of 0,what is the effect of the feedback here?
Thanks.