Abstract
In this paper, three inductor structures with different magnetic cores are established to explore the influence of magnetic core shape on inductor performance, based on the three-dimensional vertical spiral inductor. Through three-dimensional electromagnetic simulation, it is found that the introduction of the central magnetic column and the up and low magnetic leakage prevention plates greatly increases the inductance L and the quality factor Q of three-dimensional vertical spiral inductor by increasing the permeability of magnetic core and reducing the leakage loss. Based on this conclusion, a dumbbell-shaped magnetic core structure with the characteristics of central magnetic column and up and low magnetic leakage prevention plates is proposed. The three-dimensional electromagnetic simulation results verifies the excellent performance of inductor with dumbbell-shaped magnetic core which maximum quality factor is increased from 34 to 76, and the inductance value at the corresponding frequency is increased from 6nH to 64nH. It can be found that adding special magnetic cores is an effective way to improve the performance of three-dimensional integrated inductors, which provides a direction for the research on improvement of three-dimensional integrated inductor performance.
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