Wilkinson power divider

A Wilkinson divider is a component of the high-frequency technology and is used as a power divider. The circuit concept of Ernest J. Wilkinson was published in 1960 and has been widely used in radio equipment found because it has only small conduction losses.

Its function is mainly based on the λ/4-Leitungstransformation, where the power is distributed from the first gate ( P1) in equal shares to the other two ports ( P2 and P3). If problems occur on a signal path reflections in each case remains unaffected while the other path. Thus the gates P2 and P3 are mutually decoupled.

When he power combiner merges the signals to the gates of P2 and P3, and outputs them at the gate P1. For lossless combine both the phase and amplitude of the two signals must match. The balanced proportion between the ports P2 and P3 will be destroyed in cross- resistance.

The scattering parameters for a symmetric Wilkinson divider: