Miniaturized coplanar waveguide equal power divider based on crossed slow-wave transmission line

Abstract

The invention relates to a miniaturized coplanar waveguide equal power divider based on a cross-type slow-wave transmission line, belonging to the field of radio frequency microwave circuits. Aiming at the problems of large size and poor isolation of traditional equal power dividers, a cross-type slow-wave transmission line is designed by using interdigitated capacitors and serpentine inductance structures, so that the transmission line per unit length is the same as that of ordinary coplanar waveguide transmission lines. Compared with the larger distributed series inductance and parallel capacitance, the cross-type slow-wave transmission line is used to replace the traditional quarter-wavelength transmission line to reduce the size of the power splitter, which is only 35.7% of the size of the traditional power splitter . At the same time, a 100Ω isolation resistor is added between the two output ports of the power divider to increase the isolation of the power divider. The problems of excessive size and poor isolation of traditional equal power dividers in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of radio-frequency microwave circuits, and relates to a miniaturized coplanar waveguide equal power divider based on cross-type slow-wave transmission lines. Background technique [0002] As an important part of RF devices, power splitters can divide a single signal into two or even multiple signals equally or unequally, and are widely used in various RF front-end and balanced systems. With the ultra-high-speed development of modern communication technology in recent decades, miniaturized equipment has become an important development direction in the future, so it is of great significance to study miniaturized power splitters. The traditional Wilkinson equal power divider is mainly composed of two 70.7Ω quarter-wavelength transmission lines. Since the physical length of the quarter-wavelength transmission line is related to the wavelength, when its operating frequency is in the low-frequency band, its The power split...

AI Technical Summary

Problems solved by technology

Aiming at the problems of large size and poor isolation of traditional equal power dividers, a cross-type slow-wave transmission line is designed by using interdigitated capacitors and serpentine inductance structures, so that the transmission line per unit length is the same as that of ordinary coplanar waveguide transmission lines. Compared with the larger distributed series inductance and parallel capacitance, the cross-type slow-wave transmission line is used to replace the traditional quarter-wavelength transmission line to reduce the size of the power splitter, which is only 35.7% of the size of the traditional power splitter

Solve the problems of excessive size and poor isolation of traditional equal power dividers in the prior art

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