Slow wave circuit and traveling wave tube
Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit (10) includes a meandering waveguide (1) and a beam hole (2) that pierces the meandering waveguide (1), and the cross-section of the beam hole (2) in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.
NEC NETWORK AND SENSOR SYSTEMS, LTD.
H H H H H
H01P H01J H01P H01J H01J
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Takashi Norio
Nakano Masuda