A t-shaped interleaved double-gate slow-wave device

Abstract

The invention provides a T-shape staggered double-grid slow-wave device, belongs to the vacuum electronic technology field and relates to the slow-wave device which works in a millimeter wave and terahertz band travelling wave tube. The device comprises a shell and grid bodies arranged on an upper top surface and a lower bottom surface of an inner cavity. Each grid body arranged on the upper top surface and the lower bottom surface of the inner cavity is a ''T''-shape grid body, wherein a lower portion of the grid body is a rectangular body and a top portion is provided with a flat grid cover. The two adjacent ''T''-shape grid are dislocated for half a period along an axis direction. Each ''T''-shape grid body of the upper top surface and each ''T''-shape grid body of the lower bottom surface are arranged in a staggered mode with an equal distance. There is a half of a period length difference between an upper row of the ''T''-shape grids and a lower row of the''T''-shape grids. By using the device of the invention, there are the following advantages that coupling impedance is high and a dispersion characteristic is excellent; the whole device is miniaturized relatively and so on. The device is especially suitable for a terahertz band-shape electronic injection device. High output power and efficiency are possessed.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, and relates to a slow-wave device working in millimeter wave and terahertz wave band traveling wave tubes. Background technique [0002] Terahertz technology is one of the most promising technologies today, and it has broad application prospects in the fields of communication and imaging. However, due to the lack of suitable terahertz power sources, the development of the electromagnetic spectrum in the terahertz band is still blank. Vacuum electronics have great potential to realize high-power terahertz sources. Traveling wave tubes are the most important microwave and millimeter wave amplifiers in the field of vacuum electronics. They have the characteristics of high power, high efficiency, high gain, broadband and long life. They are widely used in radar, guidance, satellite communication, and microwave remote sensing. , radiation measurement and other fields, its performance dire...

AI Technical Summary

Problems solved by technology

However, due to the weak electric field in the longitudinal propagation direction (parallel to the strip-shaped electron beam) of this type of rectangular interleaved double-gate slow-wave device, the coupling impedance in the high-frequency characteristics of the device is low and the dispersion characteristics are poor, which leads to the beam-wave interaction efficiency. , low output power, poor overall output power and gain of the device, etc.

Images