The cell layer's resistance TER and capacitance Ccl
contribute predominantly at mid-range frequencies to the total
impedance, leading to the formation of a plateau. This characteristic
permits to separate these two contributions of interest from the
peripheral impedances dominating the low and high frequency end of the
spectrum. It is instructive to consider how changes in resistance TER
or capacitance Ccl affect the measured impedance spectrum.
The following diagrams show that - as a rule of thumb - the resistance TER determines the height and the capacitance Ccl the width of the plateau.
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An increase in the resistance TER shifts the plateau upwards. |
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An increase in the capacitance Ccl narrows the plateau. |
