Millimeter wave substrate integrated waveguide filtering power divider from unbalance to balance

Abstract

The invention relates to a millimeter wave substrate integrated waveguide filtering power divider from unbalance to balance, the filtering power divider is composed of two TE101 mode resonant cavities and two TE201 mode resonant cavities, the last stage of the filtering power divider is the two TE201 mode resonant cavities which are arranged back to back, and the two TE201 mode resonant cavities have inherent anti-phase field distribution and are used for generating differential output. In the substrate integrated waveguide filtering power divider, external quality factors of input and output are always equal, so that a traditional balun filter can be easily expanded into two pairs of differential outputs only by utilizing the relation of coupling coefficients. On the basis, the filtering power divider combines three functions of filtering, power distribution and unbalance-to-balance conversion (Balun) into one circuit by utilizing theoretical design criteria of a coupling coefficient and an external quality factor.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and relates to an unbalanced to balanced millimeter-wave substrate integrated waveguide filter power divider. Background technique [0002] Millimeter wave has higher spectral efficiency and higher data rate. In recent years, millimeter wave communication has received more attention than ever before, and it has become the inevitable development of the upcoming fifth generation (5G) communication and communication after 5G. trend. On the mmWave front end, reducing loss is a must to ensure mmWave technology becomes practical. Among them, the fusion device that integrates two or more functions into one circuit has become a popular design method, which can avoid the use of standard 50Ω connecting lines between multiple devices like traditional cascade design, which can effectively reduce Small circuit losses. Filters are frequency-selective components that are widely used in ...

AI Technical Summary

Problems solved by technology

Many balanced-to-balanced or unbalanced-to-balanced filter splitters using microstrip technology have been reported in recent years, but there are few such versatile devices operating in the mmWave frequency band

Because microstrip based components will suffer considerable losses at mmWave frequencies, deteriorating with increasing frequency

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