Design and simulation of novel planar Micro-transformer with high quality factor

In this paper a novel planar micro-transformer with high quality factor is presented. Non-uniform current density distribution, especially in inner turn, increases the effective metal resistance due to skin and proximity effect .In order to overcome this problem, a novel crossover connection between turns to equal the distance current path across the turns and uniform the current distribution, has been used. With diminished current crowding effects, the effective resistance is minimized, thereby increasing the performance-parameter values. Simulation has been taken by using ADS Momentum and HFSS software. The quality factor, self-inductance, mutual inductance and coupling factor at ۳.۵ GHz frequency are achieved about ۴۲.۶, ۴.۹ nH, ۳.۳ nH, ۰.۷۴۷ respectively, and occupied structure space is ۸۶۰ um×۸۶۰ um. Because of the structure is symmetric, the primary and secondary characteristic is same .compare to conventional micro-transformer ۱۷% in quality factor,۵% in coupling coefficient and more than ۲۰% in self and mutual inductance, improvement are achieved.

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