Broadband full-port matched waveguide power distributing/combining method

Abstract

A broadband full-port matched waveguide power distributing / combining method includes the steps that A, electromagnetic wave is input through an input waveguide and formed into an input signal; B, under combined action of an inductance diaphragm and an absorbing load, the signal enters a multi-layer power distribution structure; C, through multi-layer impedance gradient fin line, the space power distribution combining signal is achieved; D, the combining signal is output through an output waveguide. According to the arrangement, wide-band high-frequency efficient multi-path and fine all-port is matched, within millimeter wave frequency band, working band width reaches full band width of the waveguide, combing efficiency reaches more than 80%, frequency range is applicable to 170GHz, and an amplifier, based on the full-port matching technique, is good in stability.

Description

technical field [0001] The invention relates to a synthesis method, in particular to a broadband full-port matching waveguide power division synthesis method. Background technique [0002] As an important part of millimeter-wave radar, guidance and communication systems, millimeter-wave solid-state power amplifiers have become an important topic in the field of microwave and millimeter-wave research. With the continuous improvement of the output power requirements of the amplifier, the output power of a single amplifier chip can no longer meet the needs of the system. Therefore, the technology of multi-channel amplification and power combination must be used to effectively improve the output power of the entire amplifier circuit. [0003] Power distribution / combiners are mainly divided into planar and space forms. Planar circuit combiners and waveguide-based space power combiners. As the frequency increases, the insertion loss of planar circuit power dividers is relatively l...

AI Technical Summary

Problems solved by technology

The advantage of this structure is that it is compact, but its biggest disadvantage is that the space in the waveguide is very small in the millimeter wave band, and the number of stacked layers is very limited. Therefore, this structure cannot achieve multiple Road power distribution and combination

In order to achieve multi-channel power distribution and synthesis, the radial waveguide power division and synthesis scheme is generally adopted. The electromagnetic wave first enters the broadband radial waveguide from the coaxial, and then enters the rectangular waveguide from the radial waveguide to complete the power distribution. Each signal entering the rectangular waveguide Enter the microstrip plane circuit through the rectangular waveguide-microstrip probe array conversion structure, and then complete the multi-channel power distribution and synthesis, but this structure uses the coaxial as a transmission medium for multi-channel power division, as the frequency enters In the frequency band of 5 mm or even higher, the coaxial line is used as a transmission line, and the loss is relatively large, which will seriously affect the synthesis efficiency of a synthesizer

[0005] The disadvantage of the existing millimeter-wave power distribution / combination technology is that it is difficult to further expand the number of power distribution / combination channels in the millimeter-wave frequency band due to the use of the waveguide internal stacking scheme. In order to further expand the number of power distribution / combination channels, now Some schemes introduce a coaxial-based radial waveguide multi-channel power distribution scheme. Because of the increase in coaxial frequency, the loss of this structure increases significantly, making it difficult to apply in the 5mm band or even higher frequency bands. In addition, , the current millimeter-wave power / distribution synthesizer is difficult to achieve full-port standing wave matching, resulting in poor stability of the amplifier designed based on the synthesizer

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