Microwave radiation characteristics
(1) Microwave is opposite to infrared, which is an important radiation characteristic of objects under low temperature conditions. The lower the temperature, the stronger the microwave radiation.
(2) The intensity of microwave radiation is much weaker than that of infrared radiation, and it needs to be processed before it can be received by the receiver.
(3) In the application of remote sensing technology, the difference in microwave radiation between different features is greater than the difference in infrared radiation, so microwave can help identify features that are difficult to identify in the visible and infrared bands.
(4) The frequency of microwave is 300MHz~300GHz, which is located between the infrared radiation light wave and radio wave of electromagnetic wave, so it can only excite the molecular rotation energy level transition.