This application discloses a three-dimensional ultra-
wideband power divider, belonging to the field of
radio frequency communication technology. It includes an input port, a
strongly coupled line unit, a weakly coupled line unit, a first output port, and a second output port. The input port,
strongly coupled line unit, and weakly coupled line unit are connected sequentially. The first terminal of the second end of the weakly coupled line unit is connected to the first output port, and the second terminal of the second end of the weakly coupled line unit is connected to the second output port. The weakly coupled line unit includes any number of
coupling lines and multiple first resistors, with the multiple first resistors bridging between two
coupling lines of the weakly coupled line unit. The
strongly coupled line unit is a three-dimensional integrated vertical substrate circuit structure. This application overcomes the contradiction between ultra-
wideband,
high isolation, low loss, and
mass production through a three-dimensional integrated structure, gradually changing
coupling lines, and a multi-level bridging
resistor network, providing a high-performance power divider solution for high-frequency communication systems.