"All you need to complete the capacitor is an external conductor - a probe lead, chassis, or any other conductor completes the structure."
Sir, I am a little puzzled about what you say above.
Here I correct the phenomena I see on network anlyzer.
In range about 2GHz, when press my finger on Anylzer's port1 at full tilt(nearly bleeding ^O^), impendance of S11 is about 35ohm+0.8pf; when loosing finger a little, resistor goes up and capacitor goes down.
Based on your opinion, I know why resistor go up.
But why capicator would go down? Is it because space of "dermis and bloodstream " is reduced? Maybe I think... What about your opinion?
Thans a lot!!!