Design and Simulation of Wilkinson Power Divider for SCX Wideband Applications

This paper reports the design of a power divider for high frequency applications i.e for frequencies greater than 9GHz. The Wilkinson power divider circuit was chosen to be modified to meet the chosen specifications because of its advantages over the power dividers. The circuit design mainly aims for equal power division across the two output ports of the Wilkinson power divider circuit. Power division mainly equal power division is very essential and complex to achieve at higher frequencies. And the design of such a power divider is ideal for use in high frequency applications like radar systems, electronic missiles, optical fiber systems etc. The WPD circuit mainly consists of three microstrip lines connected in such a way that it forms a three port network. Two resistors of equal resistance were placed between the ports-2&3 which ensures equal signal flow in both the directions i.e between port-2 to port-3 and vice-versa. This ensured equal power division among the output ports. All the parameters were measured using the design equations of the microstrip line. The simulation results of the circuit for the above design showed improved isolation losses, S
23
of about −12.61 dB and return losses, S
11
of −20.72dB at frequency 10GHz. The frequency range of operation obtained from the simulation results was between 3 to 13.8GHZ. Hence the bandwidth(by considering return loss, S
11
) of the circuit obtained is ∼10GHz which is very appreciable.