Ultra-wideband power divider based on exponential gradient

Abstract

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 50omega, 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 50omega is matched to an input end of the ultra-wideband power distribution circuit, the microstrip lines with a characteristic impedance of 25omega 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%.

Description

technical field [0001] The invention relates to a power divider, that is, a power divider, in particular to an ultra-wideband power divider based on an exponential gradual change, and belongs to the technical field of microwave transmission devices. Background technique [0002] In the microwave radio frequency passive circuit, the full name of the power divider is power splitter (English name: Power divider), an important passive device used to divide one input signal energy into two or multiple signal energy outputs, and can also conversely synthesize multiple signal energy into one output, which is also called at this time Combiner . Because the power splitter has the characteristics of compact structure, stable performance, low cost and easy implementation, it is widely used in microwave radio frequency circuits such as antenna array front-ends, power amplifiers and mixers, and is one of the core components of microwave radio frequency circuits. One, and occupies a ve...

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Problems solved by technology

However, the relative bandwidth of the traditional Wilkinson (Wilkinson) power divider widely used at present is only about 10%, and when the frequency increases, the size becomes smaller, and the loss and coupling between the microstrip lines will gradually increase, seriously affecting The performance of the power divider is affected, so it is not suitable for ultra-wideband occasions

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