Title :
Parameter Extraction and Optimal Design of Spiral Inductor Using Evolution Strategy and Sensitivity
Author :
Ko, Jae-Hyeong ; Kim, Koon-Tae ; Byun, Jin-Kyu ; Kim, Hyeong-Seok
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea
Abstract :
For precise electromagnetic (EM) field simulation of the spiral inductor, electric conductivity of the inductor substrate is determined by evolution strategy to match the Taiwan Semiconductor Manufacturing Company (TSMC) process. Based on this parameter, patterned ground shield (PGS) of an on-chip spiral inductor is designed using deterministic optimization method. The design parameters are lengths and widths of ground strips and widths of slots. For sensitivity analysis, approximate adjoint variable method is used. Significant increase in Q-factor is observed in final design while reduction of inductance is minimal. Spiral inductor with optimized PGS is used in input matching circuit of 2.45-GHz low noise amplifier (LNA), which shows improved noise figure characteristics compared to non-PGS case.
Keywords :
electromagnetic fields; inductors; sensitivity analysis; Q-factor; Taiwan Semiconductor Manufacturing Company process; deterministic optimization method; electric conductivity; electromagnetic field simulation; evolution strategy; frequency 2.45 GHz; inductance reduction; inductor substrate; input matching circuit; low noise amplifier; noise figure characteristics; on-chip spiral inductor; optimal design; parameter extraction; patterned ground shield; sensitivity analysis; Conductivity; Electromagnetic fields; Electromagnetic induction; Electromagnetic shielding; Inductors; Manufacturing processes; Noise figure; Parameter extraction; Spirals; Substrates; $Q$-factor; Evolution strategy; optimal design; sensitivity analysis; spiral inductor;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2045114
