Description :
At frequencies below the self-resonant frequency, a capacitor can be considered as a pure capacitor Cs with an equivalent series resistor RS, both elements being shunted by a pure resistor Rp. Low series resistance of RS, usually below 1 ohm is prevailing the very high resistance of Rp (above 106 MΩ) in microwave applications.
Equivalent series resistance (Rp) is essentially comprised of :
• the intrinsic series resistance of electrodes and terminations, which is a few tens of milliohms maximum,
• the resistance inherent to material atomic structure losses.
Dissipation in capa-citors first occurs in the dielectric where the energy is stored and transferred. Quality factor Q, in inverse
proportion to Tg
, is determined by the ratio of stored energy to dissipated energy per cycle.

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