A three-way filter power divider with high selectivity

Abstract

The invention relates to a three-way filter power divider with high selectivity, which comprises a bottom metal ground, a middle dielectric substrate and an upper dielectric substrate successively stacked from bottom to top, and the middle dielectric substrate and the upper dielectric substrate are both penetrated with metallization The via holes are connected to each other; a circular area is etched in the center of the bottom metal ground, the upper end of the SMA head passes through the circular area and connects with the center of the intermediate dielectric substrate, and a resonator unit is printed on the upper surface of the upper dielectric substrate. The bottom metal ground, the middle dielectric substrate and the upper dielectric substrate are coaxial, and are regular hexagons with the same size and phase. The resonator unit is in the shape of a regular hexagon, the center is the first resonator which is an equilateral triangle, and the periphery is the second resonator, the third resonator and the fourth resonator which are isosceles triangles. The three-way filtering power divider of the present invention has a filtering function, and the output signals at each output end have small phase and amplitude differences, high isolation, strong out-of-band suppression performance, and good selectivity.

Description

technical field [0001] The invention relates to a three-way filter power divider with high selectivity, which belongs to the technical field of intelligent electronics. Background technique [0002] With the continuous evolution and application of wireless communication systems, the demand for low-cost, low-loss and miniaturized passive microwave components continues to increase. To adapt to this trend, an effective solution is to integrate multiple functions into one device. Therefore, integrating the functions of power distribution and frequency selection into one circuit to form a filter power divider has been a hot topic in both academic and industrial fields. [0003] At present, the most common design method of filter power divider is based on the construction of microstrip circuit, such as literature 1 (G. X.Shen, W. Q. Che, Q. Xue and W. J. Feng, "Novel design of miniaturized filtering power dividers using dual-composite right- / left -handed resonators, "IEEE Trans....

AI Technical Summary

Problems solved by technology

As we all know, the three-way Wilkinson power divider needs to be realized by connecting resistors, which makes the circuit more complicated to make, especially in planar circuits

[0004] In order to overcome this problem, some asymmetric three-way filter power dividers are designed, such as literature 4 (C. M. Zhuand J. Zhang, "Design of high-selectivity asymmetric three-way equal wideband filtering power divider," IEEE Access, vol. 7, pp. 55329-55335, May 2019), however, the asymmetric structure causes the output signals at each output terminal to have large phase and amplitude differences

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