Traditional lumped parameter circuit theory faces challenges in impedance analysis of chip inductors 3

(2) The only way to increase the self harmonic frequency SRF when the inductance L0 is at the rated value is to reduce the parasitic capacitance C0;  diode

(3) In the low-frequency working region, reducing the internal electrode resistance r will effectively improve the quality factor Q value, while in the high-frequency working region, reducing electromagnetic leakage (increasing R0) has a more significant effect on the improvement of Q value;

(4) When the operating frequency is higher than the self harmonic frequency SRF, the chip inductor exhibits capacitive impedance characteristics.  diode

In typical applications, impedance analyzers are used to detect parameters such as Z(), L(), Q() between the electrodes of chip inductors, which can accurately reflect the response characteristics of the actual circuit at the operating frequency. Based on this, accurate circuit design and device selection can be carried out. As a comparison, Figure 2 shows the L (f) and Q (f) parameter curves of high-frequency inductors (SGHI1608H100N) and ferrite inductors (SGMI1608M100N) of the same specifications. It is evident that high-frequency inductors have higher self harmonic frequencies and linear operating frequency bands, while ferrite inductors have higher Q values.  diode