A modified two-section UWB Wilkinson power divider

A novel Wilkinson power divider with modification of the traditional two-section Wilkinson power divider by adding one open stub on each branch is proposed. This design method is validated by building a divider working in the UWB band (3.1GHz – 10.6GHz). It is better in performance, but is about 10% smaller than the traditional three-section power divider and spares one resistor. The simulation and measurement results of the modified divider show equal power split, a good insertion loss of less than 1.1dB, a good return loss of all ports of less than −l0dB, and a good isolation is less than −lldB over the UWB band.