Research On The Microwave Radiation Characteristics Of Aerial Targets

Passive microwave detection technology, which is based on the inherent and can notbe hidden microwave radiation signal of targets, is a novel and effective detection method.This way of detection does not initiatively transmit eelectromagnetic signal but onlypassively do receives the microwave radiation signal, and the detection is concealed anddoes not impacted by the weather conditions and environment. The use of microwaveradiometers to detect stealth targets has a very important research value. However, thetechnical advantages of detecting aerial targets are established on the deep research of themicrowave radiation characteristics of aerial targets and background.The research of this thesis started from the microwave radiation of the object,combined with theories and methods of microwave radiometer detection and measurement,studied the microwave radiation characteristics of the target stealth in three aspects: thetarget source, atmospheric transmission channel, radiometer measurements, and madedeep research in the microwave radiation characteristics and signal transmissioncharacteristics of long-distance aerial stealth targets. Firstly, the radiation temperature ofmetal plane and solid target with radar absorbing materials (RAM) is studied. Secondly,the microwave radiation transmission characteristic of long-distance aerial stealth targetsis studied and the attenuation and emission impact of the atmosphere and surfaceenvironment is analyzed. Thirdly, a microwave radiation and transmission model that isapplied to detect aerial target is set up and simulated results verified that this model isfeasible and provided theoretical basis for the detection. Finally, the microwave radiationof a stealth aircraft models scale-model is measured, the experimental data and theoreticaldata showed the way of detection is effective, and the detection method of aerial stealthtarget is explored.