It has the lowest capacitance per unit length when compared to other coaxial cables of similar size.
The wide intrinsic region also means the diode will have a low capacitance when reverse biased.
Under zero or reverse bias, a PIN diode has a low capacitance.
The low capacitance will not pass much of an RF signal.
Specialized types of triode ("lighthouse" tubes, with low capacitance between elements) provide useful gain at microwave frequencies.
For higher switching frequencies, components with lower capacitance and inductance are needed.
These devices can be paired in series with another diode to provide low capacitance as required in communication circuits.
It is not used because it is difficult to make and would have a relatively low capacitance.
Smaller structures are more vulnerable because of their lower capacitance, meaning the same amount of charge carriers charges the capacitor to a higher voltage.
The cable has the lowest capacitance per unit-length when compared to other coaxial cables of similar size.