This letter presents a novel 3-dB transformer-based quadrature coupler (TFQC) that is based on lumped inductors connected between the coupler ports. Compared to previously reported 3-dB TFQCs that ...

Abstract: This article presents the analysis and design of a 26-GHz RF-input load-modulated balanced amplifier (LMBA) using a miniaturized dual-loop (MDL) coupler, implemented in a 0.12- μm gallium ...