A Radial Substrate Integrated Waveguide Filter Power Divider

Abstract

The invention discloses a radial substrate integrated waveguide filter power splitter, comprising an input port, a SIW circular cavity, a U-shaped intrusion groove, a first SIW rectangular cavity, a second SIW rectangular cavity, a third SIW rectangular cavity and an output port ; The input port is set at the center of the SIW circular cavity, and the SIW circular cavity is divided into five parts in the radial direction, respectively connected to one end of five first SIW rectangular cavities to form a five-way power divider, and the other end of the first SIW rectangular cavity is connected to the second SIW The rectangular cavities are connected, the third SIW rectangular cavity is located between the two second SIW rectangular cavities, the U-shaped groove is located on the metal on the upper side of the first SIW rectangular cavity, the U-shaped opening points counterclockwise, and the output port is located in the middle of the third SIW rectangular cavity. The radial substrate integrated waveguide filter power divider of the present invention has the advantages of compact structure, low loss, wide pass bandwidth, low manufacturing cost and convenient application.

Description

technical field [0001] The invention belongs to the field of microwave and millimeter wave passive devices, in particular to a radial substrate integrated waveguide filter power divider. Background technique [0002] Power splitters are widely used in electronic communication systems, especially in radar systems and antennas. In actual use, a power splitter is used to divide one signal into several uniform or uneven signals, but the attenuation of the power splitter in the non-working frequency band is not large enough to reject signals of unnecessary frequencies. Typically, a bandpass filter is used to filter out unwanted frequencies. In this case, both the power splitter and the filter occupy a large space. With the further development of high integration level and miniaturized system, the integration requirements of microwave devices are getting higher and higher, and it will be a future trend to integrate power splitters and bandpass filters into filter power splitters...

AI Technical Summary

Problems solved by technology

[0004] Existing research cannot meet the requirements of broadband miniaturized communication systems. C.Rave et al. proposed a radial SIW power divider with multi-layer substrates, which achieved a bandwidth of 45% at a center frequency of 20 GHz, but did not integrate filtering functions.

In 2014, Song, K. proposed a bandpass filter power splitter with multi-probes and multi-radial slots on the basis of a single-layer dielectric substrate. The insertion loss is very low, only about 0.3dB, and has a relatively good Stopband bandwidth, but the phase difference between adjacent ports is 180°, which is not suitable for the application environment that requires the same phase

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