Three-dimensional multipath radial power divider

Abstract

The invention provides a three-dimensional multi-path radial power divider. A main body part of a circuit is formed by connecting a section of a linear coaxial waveguide and a section of a coaxial cone with gradually changed inner and outer diameters; the coaxial cone consists of a solid metal cone and a conical metal shell; an enclosed waveguide cavity is filled with air; a coaxial joint is mounted at the center of the front end of the power divider and is used as a signal input end; the terminal of the power divider is provided with a metal short-circuit surface; and the output end of the power divider is a three-dimensional multi-stage coaxial probe array arranged along the axial direction of the cone, each stage of probe array comprises a plurality of coaxial probes which are distributed around the circumference of the cross section of the cone shell at equal included angles, and the coaxial probes are inserted into the waveguide cavity along the radial direction of the cross section. The power divider can realize feed output of various amplitude-phase distributions, greatly improves the number of paths of output signals, further changes the amplitude and phase of the output signals by adjusting the length of the output probes and the length of a coaxial line connected with an antenna unit, and can be used as a phased array antenna feed network with large-scale complex aperture field distribution.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a three-dimensional multipath directional power divider. Background technique [0002] The power splitter is an important part of the antenna system, which is used to realize the signal power distribution of the transmitting antenna or the signal power combination of the receiving antenna. Phased array antennas are widely used in the fields of communication, radar, and wireless microwave energy transmission. For various applications, phased array antennas are required to achieve various or even arbitrary aperture field distributions. With the increase in the size of the antenna array The design and implementation of the corresponding feeder network is facing many difficulties. [0003] The feed network of a phased array antenna is usually implemented based on a microstrip power divider or a waveguide power divider. The microstrip power divider has the advantages of compact str...

AI Technical Summary

Problems solved by technology

In 2007, Kaijun Song proposed and designed a 4-way power divider based on radial waveguide in the article "Broad-Band Power Divider Based On RadialWaveguide". This type of structure power divider can realize more output channels. number, but the impedance matching of the circuit is relatively difficult

The output ports of existing microstrip power dividers and waveguide power dividers are generally located on a two-dimensional plane in the circuit structure, the number of output ports is directly limited by the size of the circuit, and the output signals are mostly equal amplitude and in phase distribution or a single, fixed distribution, which is limited in the application of large-scale array antennas

[0004] In order to meet the feeding requirements of large-scale phased array antennas, the existing microstrip power dividers and waveguide power dividers are restricted by the circuit structure and have a limited number of output ports, and the output signal amplitude and phase distribution are relatively single and fixed. problem, the present invention proposes a new type of three-dimensional multi-path direction power splitter, the output end of the power splitter is a multi-level probe array with a three-dimensional structure, and this output structure utilizes the axial and lateral dimensions of the waveguide at the same time, It breaks through the direct limitation of the two-dimensional cross-sectional size of the waveguide on the number of output ports

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