Disclosed is an ultra-
wideband power divider based on an exponential gradient. The ultra-
wideband power divider is composed of
microstrip lines and ports of the
microstrip lines, wherein the
microstrip lines are located on a
dielectric slab and used as a power divider body, and achieve matching and transmission characteristic transformation. The ultra-
wideband power divider is provided with one input port, two equi-amplitude and in-phase output ports, an impedance conversion circuit and an ultra-wideband power distribution circuit, wherein the impedance conversion circuit and the ultra-wideband power distribution circuit are located between the input port and the output ports. The
characteristic impedance of each of the microstrip lines of the three ports is 50
omega, and the whole circuits are vertically symmetrical. One microstrip line based on the exponential gradient is adopted for the input port, the microstrip line with a
characteristic impedance of 50
omega is matched to an input end of the ultra-wideband power distribution circuit, the microstrip lines with a
characteristic impedance of 25
omega are divided into two vertically-symmetrical output paths, four sections of semicircular microstrip lines are in
cascade connection to output equi-amplitude and in-phase signals, the characteristic impedance of each section of semicircular microstrip line is 50omega, the
electrical length of each section of semicircular microstrip line is pi / 2, an isolating
resistor is connected between each pair of microstrip lines arranged up and down, and the isolating resistors are different from one another. The ultra-wideband power divider based on the exponential gradient is good in
transmission performance, and
relative bandwidth can reach more than 100%.