Three-Way Parallel-Coupled Microstrip Power Divider With Ultrawideband Performance and Equal-Power Outputs

A compact equal-power three-way divider with ultrawideband performance is presented. The proposed device utilizes simple, three parallel-coupled microstrip lines. In order to enable the use of practical gaps between the tightly coupled lines, slotted ground plane and lumped capacitors, which are connected symmetrically between the two sidelines and the centerline, are utilized. The conformal mapping technique is employed to find the dimensions of the device. The simulated and measured output power, return loss, and isolation show that the proposed divider operates well across the frequency band from 4 to 11 GHz.