Novel broadband power divider with filtering characteristic

Abstract

The invention provides a novel broadband power divider with a filtering characteristic. The power divider has a symmetric arrangement and comprises the components of an input port; a first output portand a second output port which are symmetrically arranged at two opposite sides and are used for outputting the signals with the same phase and the same amplitude after filtering; an independent andcomplete grounding surface; a three-conductor microstrip coupling line structure; two microstrip lines which are symmetrically placed and respectively have an open end and have gradiently changing resistance; a lumped parameter isolating resistor of which the two ends are placed between two no-adjacent coupling lines of two three-conductor coupling lines for isolating the first output port and thesecond output port; and a dielectric board which is the substrate of a printed circuit and is used for bearing the whole circuit. The novel broadband power divider with the filtering characteristic can realize a power dividing function and a signal filtering function through one device, and furthermore has an ultra-wide broadband realizing range.

Description

technical field [0001] The invention relates to a novel broadband power divider with filtering characteristics, specifically a power divider with two output ports equally divided and output signals filtered by a band-pass filter, belonging to the technical field of microwave transmission devices. Background technique [0002] A power divider, also known as a power divider, is a device that divides the energy of one input signal into two or more outputs with equal or unequal energy. Because the microstrip power divider has the characteristics of compact structure, stable performance, low cost and easy implementation, it is widely used in the radio frequency circuit of the microwave front-end system. Its main technical parameters are: power loss (including insertion loss, distribution loss and reflection loss), voltage standing wave ratio of each port, isolation between power distribution ports, and frequency bandwidth. A bandpass filter is a device that allows waves of a spe...

AI Technical Summary

Problems solved by technology

Moreover, traditional power splitters need to increase the number of stages to achieve broadband performance, which increases circuit complexity, circuit size, and insertion loss

However, the design of a compact filter power divider that can simultaneously have good broadband power distribution performance and high selectivity and high out-of-band rejection performance is still lacking.

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