Novel high-power microwave millimeter wave air-cooling type conical-structured absorption dry load

Abstract

The invention discloses a novel high-power microwave millimeter wave air-cooling type conical-structured absorption dry load, and belongs to the fields of high-power microwave millimeter wave devices.The structure comprises metal heat conducting sheets and wave-absorbing dielectric sheets which are arranged periodically and alternately; the metal heat conducting sheets and the wave-absorbing dielectric sheets form a columnar structure with a conical cavity in the interior, and the bottom of the conical cavity is connected with circular waveguide; and a layer of slotting heat dissipation sheets are also arranged on the outer side of the columnar structure. The metal heat conducting sheets and the wave-absorbing dielectric sheets are arranged periodically and alternately, so that electromagnetic disturbance in the dry load can be lowered, and the electromagnetic reflection of the dry load is further lowered; by virtue of high microwave attenuation characteristic of the wave-absorbing dielectric, the microwave absorption capability of the dry load is ensured; and by virtue of strong heat conduction of the metal heat conducting sheets, the heat of the wave-absorbing dielectric can beguided to the heat dissipation sheets quickly to lower the internal temperature of the load. The novel high-power microwave millimeter wave air-cooling type conical-structured absorption dry load hasthe advantages of high power capacity, broad working frequency band, high stability, small size, convenience in use, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of high-power microwave and millimeter-wave devices, and specifically relates to a new wide-band high-power dry load applied to a gyrotron traveling wave tube system. Background technique [0002] The gyrotron is a high-power, high-gain, millimeter-wave electric vacuum device with a certain bandwidth. It has important application prospects in the fields of high-resolution millimeter-wave imaging, millimeter-wave countermeasures, and microwave communication systems. The output pulse power of the high-power gyrotron amplifier can reach more than 100 kilowatts, and the average power can reach thousands of watts or even tens of kilowatts. In order to avoid electromagnetic environmental pollution and human damage caused by strong electromagnetic radiation, laboratories generally use absorption loads Electromagnetic energy absorption. According to the level of absorbed power, the absorption load mainly includes l...

AI Technical Summary

Problems solved by technology

However, due to the low thermal conductivity of solid absorbing materials, it affects the overall thermal conductivity of dry loads and restricts the improvement of power capacity.

Therefore, the common dry load power capacity is in the order of tens of watts or hundreds of watts, which cannot meet the requirements for the use of high-power gyrotron TWTs

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