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J. Electromagn. Eng. Sci > Volume 8(2); 2008 > Article
Journal of the Korean Institute of Electromagnetic and Science 2008;8(2):47-51.
DOI: https://doi.org/10.5515/JKIEES.2008.8.2.047   
Parallel-Branch Spiral Inductors with Enhanced Quality Factor and Resonance Frequency
Hyun-Cheol Bae1, Seung-Hyeub Oh2
1RF Circuit Group, IT Convergence & Components Laboratory (ICCL), Electronics and Telecommunications Research Institute
2National University of Chungnam
Abstract
In this paper, we present a cost effective parallel-branch spiral inductor with the enhanced quality factor and the resonance frequency. This structure is designed to improve the quality factor, but different from other fully stacked spiral inductors. The parallel-branch effect is increased by overlapping the first metal below the second metal with same direction. Measurement result shows an increased quality factor of 12 % improvement. Also, we show an octagonal parallel-branch inductor which reduces the parasitic capacitances for higher frequency applications.
Key words: Parallel-Branch Inductor, Quality Factor, Resonance Frequency

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