On mw two-port osc design

Greetings, everyone!

I'm currently trying to design a X band mw DRO

When talking about the S-param approach to designing osc, most of the texts I ran into gimme sth like this:

What if I want to design a parallel feedback DRO like this:

Will the theory in pic1 be applicable to this?
If not, what's the s-param approach to parallel feedback DRO?

Any suggested reading is welcomed, Thanx