Soil moisture content non-contact detection system and method based on antenna sensor

The invention relates to a soil moisture content non-contact detection system and method based on an antenna sensor, and belongs to the technical field of soil property measurement. Comprising the following five steps: S1, selecting a proper antenna sensor frequency and a ground penetrating radar center frequency according to a detected soil moisture content range and depth; s2, detecting the spectral response of the antenna sensor in the air by adopting a ground penetrating radar to obtain a minimum value fa of a spectral signal; s3, detecting the spectral response of the antenna sensor buried in the stratum by adopting a ground penetrating radar to obtain a spectral signal minimum value fd; s4, the dielectric constant of the measured stratum is calculated according to the formula epsilon r = (fa/fd) 2; and S5, calculating the water content of the measured stratum by adopting a Topp formula. The method has the advantage of detecting the moisture content in a non-contact mode, and on the basis of a traditiona