The present invention discloses a
confocal waveguide ceramic open annulated column
microwave absorption device and belongs to the
microwave,
millimeter wave and terahertz device technical field. The device comprises an open
confocal waveguide mirror, an input end, an output end and open annulated columns, wherein the open
confocal waveguide mirror is in longitudinal symmetry, the input end and the output end are extension sections at two ends of the open confocal waveguide mirror respectively, and the open annulated columns are symmetrically arranged at two sides of the open confocal waveguide mirror. According to the confocal waveguide
ceramic open annulated column
microwave absorption device of the invention, the
ceramic open annulated columns are adopted to absorb energy irradiated from a high-frequency
interaction structure, and diffracted microwaves can be reflected and absorbed many times in the cavities of the annulated columns, and therefore, backward
wave oscillation can be better suppressed, local overheating can be prevented, the heat dissipation problem of the high-frequency interaction
system can be solved to a certain extent, and the stability of a confocal waveguide gyro travelling
wave tube can be improved; and compared with other structures of the same size with the open annulated columns, the open annulated columns have a larger internal surface area and a greater superficial area for absorbing
radiation electromagnetic
waves and have higher microwave
absorption efficiency, thereby improving the average
power capacity and stability of the confocal waveguide gyro travelling
wave tube.