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http://dx.doi.org/10.5762/KAIS.2012.13.3.1284

Frequency Characteristics of Octagonal Spiral Planar Inductor  

Kim, Jae-Wook (Department of Electronic Engineering, Namseoul University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.3, 2012 , pp. 1284-1287 More about this Journal
Abstract
In this study, we propose the structures of octagonal spiral planar inductors without underpass and via, and confirm the frequency characteristics. The structures of inductors have Si thickness of $300{\mu}m$, $SiO_2$ thickness of $7{\mu}m$. The width of Cu coils and the space between segments have $20{\mu}m$, respectively. The number of turns of coils have 3. The performance of spiral planar inductors was simulated to frequency characteristics for inductance, quality-factor, SRF(Self- Resonance Frequency) using HFSS. The octagonal spiral planar inductors have inductance of 2.5nH over the frequency range of 0.8 to 1.8 GHz, quality-factor of maximum 18.9 at 5 GHz, SRF of 11.1 GHz. Otherwise, square spiral planar inductors have inductance of 2.8nH over the frequency range of 0.8 to 1.8 GHz, quality-factor of maximum 18.9 at 4.9 GHz, SRF of 10.3 GHz.
Keywords
Octagonal; Spiral; Inductor; SRF; Quality-factor;
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