Microstrip line slow-wave structure

Abstract

The invention discloses a microstrip line slow-wave structure and belongs to the technical field of microwave vacuum electrons and relates to an O-shaped electron vacuum device. The microstrip line slow-wave structure comprises a microsrip transmission line structure which is formed by a metal microstrip line (1), a medium substrate (2) and a metal base plate (3), wherein the metal microstrip line (1) is of a periodic structure which is formed by a plurality of O-shaped metal microstrip line units, the O-shaped metal microstrip line units are in end-to-end connection, each O-shaped metal microstrip line unit is composed of an ellipse opening ring microstrip line and two microstrip lines, and the two microstrip lines are respectively connected with two ends of an opening of the ellipse opening ring microstrip line respectively. Compared with a traditional N-shaped microstrip line slow-wave structure, the microstrip line slow-wave structure has higher coupling impedance and lower working voltages under the size of the same devices, and comprehensive requirements for the aspects such as output power, the working voltages and weight of a traveling-wave tube can be further met.

Description

Technical field [0001] The invention belongs to the technical field of microwave vacuum electronics, and relates to an "O" type electric vacuum device. Background technique [0002] "O" type electric vacuum device is the most important type of microwave and millimeter wave sources in the field of vacuum electronics. It has the characteristics of high power, high efficiency, high gain, frequency bandwidth and long life. It is widely used in millimeter wave and sub Millimeter-wave radar, guidance, communications, microwave remote sensing, radiation measurement and other fields are also praised as the "heart" of weapons and equipment, and its performance directly determines the level of the overall equipment. The slow wave structure of the microstrip line is mainly used for traveling wave tubes. Compared with other kinds of devices, the advantages of traveling wave tube are wide frequency band, good heat dissipation performance, single tube high gain, excellent nonlinear performanc...

AI Technical Summary

Problems solved by technology

[0004] However, the coupling impedance of the N-type metal microstrip slow-wave structure TWT is relatively small, and the operating voltage is relatively large. The coupling impedance is a parameter that characterizes the strength of the electron beam and the slow-wave system, and the coupling impedance directly affects Gain and Efficiency of Traveling Wave Tubes

The relatively small coupling impedance and large operating voltage of the N-type metal microstrip slow-wave structure limit its application development

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