Radial logarithmic helix waveguide slow wave line and processing method thereof
A logarithmic spiral and slow wave line technology, applied in the field of microwave vacuum electronic devices, can solve the problems of reducing current density, affecting beam-wave interaction, limiting the efficiency of beam-wave interaction, etc.
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[0040] Instance
[0041] In this example, such as Figure 4 As shown, in the W band, the specific dimensions of the radial logarithmic spiral waveguide slow-wave line are as follows (unit: mm): a=16, b=0.02, h=2.65, w=1.3, w2=0.6, t=0.4 , Rc=8. See the normalized phase velocity curve Figure 5 , When the center frequency is 94GHz, the working voltage is about 102V, which is much lower than that of conventional traveling wave tubes.
[0042] In this example, the slow wave line of the radial logarithmic spiral waveguide of the present invention uses a circular radial electron optical system to work, such as Figure 7 Shown. 1 is a cylindrical cathode, using thermal emission, the radial band electron beam is emitted from the cylindrical side of the cathode. Since the radius of the cathode can be made large, the current it can emit is much higher than that of conventional traveling wave tubes. The cathode, which is also one of the advantages of the radial beam traveling wave tube; 7 ...
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