Gysel power distribution filter with high power distribution ratio

Abstract

The invention discloses a Gysel non-uniform power distributor with a high power distribution ratio. The Gysel non-uniform power distributor with the high power distribution ratio comprises an upper-layer micro-strip structure, an isolation element, an interlayer medium substrate and a lower layer earthing metal plate. Each Gysel non-uniform power distributor with a high power distribution ratio comprises two impedance transformers with a 90-degree phase difference, four 1/4-wavelength branch lines with different characteristic impedances and two isolation resistors, wherein the input/output impedance of each impedance transformer can be regulated by changing the strength of coupling of a resonator so as to carry out power distribution of different ratios and realize matching. Compared with a Gysel power distributor of which the input port and the output port are connected by a 1/4-wavelength impedance line, the structure is characterized in that the high power distribution ratio can be realized, and the bandwidth of the structure can be arbitrarily controlled. Meanwhile, two transmission zero points can be established on the edge of a passband, and the frequency selectivity is improved. The Gysel power distribution filter with the high power distribution ratio has the high power distribution ratio of 10:1, and can be suitable for various antenna array fields.

Description

Technical field [0001] The invention relates to a power divider with a high power division ratio, in particular to a Gysel power division filter with a high power division ratio that can be applied to a radio frequency front-end circuit with a filtering function. Background technique [0002] The power divider is a basic part of the microwave circuit. Because it has the function of separating and combining signals, it is used in many antenna arrays and balanced circuits. [0003] In the past few decades, there has been a lot of research on power dividers. The focus of the research is to broaden the frequency band, reduce the area, dual-frequency response and harmonic suppression. [0004] In many high-power radio frequency systems, arbitrary power division ratios are required. However, high-power circuits require high heat dissipation. Traditional Wilkinson power dividers are difficult to implement. In contrast, Gysel power dividers External resistors can dissipate heat well. In th...

AI Technical Summary

Problems solved by technology

[0004] In many high-power radio frequency systems, arbitrary power division ratios are required, but high-power circuits require high heat dissipation, and traditional Wilkinson power dividers are difficult to achieve. In contrast, Gysel power dividers External resistors can dissipate heat very well. Past research, whether based on Wilkinson or on the basis of Gysel power splitters, failed to achieve high power split ratios.

Most of them are limited to changing the impedance of the microstrip line to change the power division ratio, but a high power division ratio requires a high-impedance microstrip line, which is difficult to achieve in practice

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