A Dry S-Band High-Power Load

摘要

The design of an S-band high-power RF load that is based on WR284 copper waveguide and uses Silicon Carbide (SiC) as an absorber material has been developed. The incident RF-power is split into four, equal parts each being absorbed by a dedicated sub-load. Each sub-load contains a central vacuum channel ,and two side channels which are filled in with SiC, and coupled to the main channel by the two sets of metallic rods. The load delivers VSWR less than 1.06 at the operating frequency of 3GHz and 1.22 at the frequency range of ±0.15 GHz. The absorbed peak power is as high as 30 MW, The average power handling capabilities are dictated by the type of load cooling. In the case of cooling provided by natural air-flow convection the average power can be as high as 5 kW; in the case of water cooling, the, absorbed average power can be ten times higher.