Micro-rectangular Coaxial Structure-based Broadband Millimeter-wave Power Divider

Abstract

Power divider is an important circuit component in radio frequency micro-eletromechanical systems (RF MEMS). Current power divider designs are mainly based on conventional transmission structures (e.g., microstrip, coplanar waveguide, etc.). These structures are not fit for high-density millimeter-wave integrated circuits due to the large signal coupling and radiation loss between lines. In this paper, we propose a novel millimeter-wave broadband power divider based on micro-rectangular coaxial structures. In our proposed method, the micro-rectangular coaxial structure and ground-signal-ground (GSG) form are utilized as the basic transmission and the switching structure of power divider respectively. Moreover, a novel millimeter-wave broadband power divider is designed with an operating frequency range of 16~38GHz by integrating GSG and micro-rectangular coaxial lines. The simulation results show that the designed power divider has good performance in return loss (S11<-20dB), isolation (S32<-20dB), and insertion loss (better than 0.35dB). Also, the measurement results are in agreement with the simulation results, which demonstrate the effectiveness of our proposed schema.