Capacitor loss at radio frequencies

A means for characterizing the effective series resistance (ESR) of low loss capacitors at radio frequencies with only a few measurements is suggested. It is necessary that the dielectric have a known loss/frequency relationship. At low frequencies, D should be constant, or change at a constant rate, as many dielectrics do. At high frequencies, the capacitor loss should be attributable to skin effect in the conductors and must not exhibit parallel or dimensional resonances in the frequency range of interest, usually a phenomenon of high permittivity dielectrics