Curved groove loading winding waveguide slow wave line
A technology of zigzag waveguide and curved waveguide, which is applied in the field of microwave vacuum electronics, can solve the problems that the volume and output power cannot meet the requirements of miniaturization and high-power development of traveling wave tubes.
Inactive Publication Date: 2011-02-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0004] According to the relevant domestic and foreign experimental reports, although the meander waveguide slow-wave structure has a wide bandwidth, its volume and output power still cannot meet the requirements of the development of traveling wave tubes towards miniaturization and high power.
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[0026] specific implementation plan
[0027] Such as Figure 5 , in the 8mm millimeter wave band, set the structural dimensions of the specific embodiment of the curved groove loaded meander waveguide slow wave line (unit: mm): a=5, b=0.7, L=3.1, p=1.2, r 0 =0.5,b 0 =0.5,p 0 = 1.2, h 0 = 0.68.
[0028] Using 3D electromagnetic simulation software and 3D injection-wave interaction simulation software to simulate the slow wave line of the meander waveguide loaded on the curved groove, obtain its coupling impedance, output power, bandwidth, device length required for power saturation, etc., and compare with ordinary The meander waveguide is compared to the slow wave line. The meandering waveguide slow-wave line loaded with curved slots has higher coupling impedance, and can output power 1.65 times higher than that of ordinary meandering waveguide slow-wave lines in a wider frequency band with a smaller volume.
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The invention provides a curved groove loading winding waveguide slow wave line, relating to a travelling wave tube amplifying device in the technical field of microwave vacuum electronics. A series of arc (or right-angle) bend waveguides and straight waveguides are connected end to end to form a winding waveguide structure; each bend waveguide is provided with an opening along the broadside direction of the waveguides outboard; each opening position is connected with a curved groove; curved grooves at the same side of a central axis symmetric line share the same bending direction, while curved grooves at the two different sides of the central axis symmetric line have opposite bending directions; the whole winding waveguides and the chamber of the curved grooves are mutually communicated;the central axis symmetric line of the winding waveguide structure and the straight waveguides wall are provided with circular through holes at the point of intersections thereof; two through holes of all adjacent straight waveguide walls are connected by metal tubes with the same aperture size as the aperture size of the circular through holes to form electron bunch channel. In the invention, the curved grooves are loaded to improve field distribution in conventional winding waveguide slow wave line, and the slow wave line of the invention, compared with ordinary slow wave line, has broader bandwidth, higher output power and smaller device volume.
Description
technical field [0001] The invention belongs to the technical field of microwave vacuum electronics and relates to a traveling wave tube amplification system, in particular to a waveguide slow wave line in the traveling wave tube amplification system. Background technique [0002] Modern traveling wave tubes have become important microwave electronic devices for electronic equipment such as radar, electronic countermeasures, satellite communications, navigation, and remote sensing. The slow wave line is the core of the traveling wave tube, and its performance directly determines the technical level of the traveling wave tube. In traveling wave tubes, the most widely used slow wave structures are helix and coupled cavity. The dispersion characteristics of the helix are flat and the working frequency is wide, so it has been widely used in traveling wave tubes; but the output power of the helical traveling wave tube is limited, especially when the traveling wave tube works in ...
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IPC IPC(8): H01J23/24
Inventor 魏彦玉宫玉彬王文祥廖明亮赵国庆何俊段兆云
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA