An adjustable power ratio branch line design

Abstract

This paper proposes an adjustable output power ratio branch line design. By using the T-type equivalent circuit replaced the transmission lines of the branch line and changing the capacitors values in the T-type equivalent circuit, we could have different output power ratio. A 2:1 power ratio branch line adjusted to 1:1 or 3:1 power ratio is achieved by simply changing the capacitors values. The simulated and experimental results show a good agreement within the frequency of interest.