The characteristic parameters,such as calibration sensitivity,dynamic range,modified quantity of radiating temperatures of radiometer s reference load and calibration blackbody of a new 3mm band radiometer,were measured.

Principle and design method of a power divider implemented based on H-plane waveguide slot bridge are introduced;simulation design to the 3mm band power divider by using of software HFSS is conducted,and simulation results show that this design method is correct.

Based on the theoretical model of the electromagnetic wave attenuation by conductive fibers, the interferential effect of short carbon fibers at 3mm wave was calculated and tested, in the microwave darkroom and outdoors.

The concrete shielding material were first analyzed in 3mm wave bands.

Started from the analysis and comparison of several kinds material which interfere millimeter wave at present, a new-type material of interference 3mm wave-the ultrathin electric slice is discovered in this text.