Highly Miniaturized On-chip Impedance Transformer Employing Coplanar Waveguide with Periodic Ground Structure on GaAs MMIC

摘要

In this study, we propose a highly miniaturized and broadband on-chip impedance transformer on monolithic microwave integrated circuit (MMIC), which was fabricated by a coplanar waveguide employing Periodic Ground Structure (PGS). The novel highly miniaturized impedance transformer was developed for application to low impedance matching in broadband. The size of the impedance transformer employing the coplanar waveguide with PGS is 0.64% of the one fabricated by conventional coplanar waveguide. The transformer showed a good RF performance The above results indicate that the impedance transformer fabricated by a coplanar waveguide structure with PGS is promising candidate for applications to highly miniaturized passive components on MMIC on GaAs substrate, and it will enable to the development of fully integrated MMICs due to the miniaturized size.