The Systematic Optimization Designs for the Microwave Wide Band Blackbody Calibration Target’s Electromagnetic and Thermal Characteristics

The systematic optimizations to the microwave wide band blackbody calibration target applied for the microwave radiometer’s pre-launch calibrations are researched with its electromagnetic and thermal characteristics based on the Kirchhoff’s law, the sub-grid finite difference time domain（FDTD）method and the thermal analysis. Optimization results indict that round wedge is better than the square one, the best ratio for height to bottom radius is 4:1 for the wide band application, and the absorbing material’s gradual thickness coating and multilayer coating are helpful to guarantee the uniform distribution of surface temperature with a higher emissivity. 1