A New Type of Wilkinson Power Divider with Triple-band Response Based on Dual Transmission Line

The conventional single uniform transmission line can be equivalent to the dual transmission line, which has been proposed in the previous literature. Because this equivalence is usually not a narrow bandwidth, each transmission line section of conventional tri-band Wilkinson power divider using three-section transmission-line transformers may be replaced by the dual transmission line. Based on this equivalence, a new type of triple-band Wilkinson power divider composed of six dual transmission lines and three resistors between the two transmission paths is presented in this paper. To reduce the total circuit size, the proposed triple-band Wilkinson power divider is implemented by using meander dual transmission lines. Furthermore, the simulated results are good agreement with the circuit models of the proposed divider and conventional tri-band Wilkinson power divider using three-section transmission-line transformers, and the simulated comparison also provides in this study to support our design concept. To verify the proposed design, a new triple-band Wilkinson power divider is carefully examined and fabricated on a substrate with a thickness of 3.2mm, a relative dielectric constant of 3.55, and a loss tangent of 0.0065.