Trapezoidal slow wave lines of coupling slot for traveling wave tube
A technology of coupling slots and traveling wave tubes, applied in the field of slow wave lines, can solve the problems of narrow bandwidth and unstable operation of high-order modes, and achieve the effect of increasing bandwidth and solving unstable operation
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Embodiment 1
[0028] Embodiment 1: as Figure 5 , Figure 8 , Figure 9 and Figure 10shown. A coupling slot trapezoidal slow wave line for a traveling wave tube, consisting of multiple groups of rectangular metal plates 13 arranged periodically along the axial direction of the electron beam channel 8 of the traveling wave tube, the rectangular metal plates 13 are perpendicular to the axial direction, There is a circular hole in the center of the rectangular metal plate 13, and there are rectangular coupling grooves 14 at both ends of its narrow side. The rectangular metal plate 13 is wrapped by a metal shielding shell 5 extending in the axial direction, and the inside of the metal shielding shell 5 is A rectangle matching the size of the rectangular metal plate 13, with a photonic crystal strip 15 extending axially along the electron beam channel 8 in the coupling groove, the width of the photonic crystal strip 15 is the same as that of the rectangular coupling groove, and the thickness...
Embodiment 2
[0029] Embodiment 2: as Figure 5 , Figure 11 and Figure 12 shown. A coupling slot trapezoidal slow wave line for a traveling wave tube, consisting of multiple groups of rectangular metal plates 13 arranged periodically along the axial direction of the electron beam channel 8 of the traveling wave tube, the rectangular metal plates 13 are perpendicular to the axial direction, There is a circular hole in the center of the rectangular metal plate 13, and there are rectangular coupling grooves 14 at both ends of its narrow side. The rectangular metal plate 13 is wrapped by a metal shielding shell 5 extending in the axial direction, and the inside of the metal shielding shell 5 is A rectangle matching the size of the rectangular metal plate 13, each rectangular coupling groove 14 has two photonic crystal strips 15, the thickness of the photonic crystal strip 15 is the same as the rectangular coupling groove 14, and the width is less than half of the width of the rectangular co...
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