Slow wave structure of folding frame

Abstract

The invention relates to a slow wave structure of a folding frame, and the structure belongs to the technical field of microwave electric vacuum devices. The structure comprises an upper metal bottom plate and a lower metal bottom plate (2 and 1) which have the same shape and size and are in parallel with each other; medium layers (3 and 4) are respectively arranged on the opposite surfaces of the upper metal bottom plate and the lower metal bottom plate; metal microstrip lines (5 and 6) are respectively arranged on the opposite surfaces of the medium layers (3 and 4); the upper and the lower metal microstrip lines (5 and 6) have the same line width, are respectively folded periodically, and are mutually in mirror symmetry; and folding top points which correspond to the upper and the lower metal microstrip lines (5 and 6) are connected by metal connecting wires (7). Compared with the existing slow wave structure of a symmetric double V-shaped microstrip line, according to the slow wave structure of the folding frame, the inside of a whole working frequency band is provided with a higher coupling impedance value, so that the gain and the efficiency of a traveling wave tube can be further improved. Meanwhile, the manufacturing of the slow wave structure of the folding frame can be realized through a microfabrication technology, and the structure has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of microwave electric vacuum devices, and relates to traveling wave tube amplifiers. Background technique [0002] Traveling wave tubes have the incomparable advantages of broadband, high gain and low noise and other electric vacuum devices, and are widely used in radar, communication, microwave remote sensing, guidance and electronic countermeasures and other fields. With the development of modern microwave electronic technology, aerospace engineering and military equipment have put forward higher requirements for broadband, high efficiency and miniaturization of millimeter wave sources. However, compared with the existing solid-state sources, although the traveling wave tube has advantages in high power and wide frequency band, it is bulky and has a high operating voltage. As the core component of the TWT, the slow-wave structure directly affects the efficiency of the beam-wave interaction and the technic...

AI Technical Summary

Problems solved by technology

However, the coupling impedance of the symmetrical double V-shaped microstrip slow-wave structure traveling wave tube is small, which limits its application development.

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