RF power divider for CDMA, Bluetooth & 3G application using stepped-impedance technology

A novel RF power divider for CDMA (1.8GHz), Bluetooth (2.4GHz) & 3G (2.1GHz & 2.5GHz) application using stepped-impedance technology on microstrip line is proposed in this paper. This divider is formed by installing the concept of a microstrip multi-section impedance transformer and for achieving of wideband using stub matching. Finally, a compact power divider is designed, and it is demonstrated that 9dB powers splitting from one input port to eight output ports is achieved. In addition, good impedance matching at all the three ports and excellent isolation between two output ports are obtained over the specified 1.7-2.6GHz wideband range. The simulated return loss is greater than 10 dB over the WB. The average insertion loss, and group delay are around 9dB (including the 9-dB power-dividing insertion loss) and around 0.3 ns over across the wideband. In addition, the isolations between the output ports are greater than 10 dB over the wideband.