Q Factor of a Resonant Cavity Calculator

Posted by Dinesh on

Online Q factor calculator to calculate resonant cavity Q factor from the resonant frequency, cavity energy values.

The quality factor or Q factor is a dimensionless parameter that describes how under-damped an oscillator or resonator is, and characterizes a resonator's bandwidth relative to its center frequency.

A cavity resonator is a hollow closed conductor such as a metal box or a cavity within a metal block, containing electromagnetic waves reflecting back and forth between the cavity's walls. When a source of radio waves at one of the cavity's resonant frequencies is applied, the oppositely-moving waves form standing waves, and the cavity stores electromagnetic energy.

Resonant Cavity Q Factor Calculation

Formula:

Q=2πf0EP

where,

fo is the resonant frequency

E is the stored energy in the cavity

P = −dE/dt is the power dissipated