Detection of chirp-radar signals by means of proton-spin echoes

Chirp-radar pulse compression by means of proton-spin echoes has been experimentally investigated. These experiments are easier than those with electrons, because they are feasible at room temperature, and it is possible to change the relaxation time and resonance width continuously. In radar applications, the main difficulties are likely to be found in leakage and attenuation. These difficulties can be reduced by working at frequencies as high as possible and improving the experimental setup.