System and method for radio frequency penetration imaging of an object

A radio frequency (RF) system for determining whether there is at least one object within a target medium, the system comprising

• a generation and reception subsystem configured to generate and receive a plurality of RF signals;
• an RF antenna array, the RF antenna array comprises a plurality of antennas configured to transmit the plurality of RF signals towards the target medium and receive a plurality of RF signals reflected from the target medium;
• a data acquisition subsystem configured to receive and store said plurality of reflected RF signals;
• and
• at least one processor, said at least one processor is configured to:
• estimate the distance between the surface of the target medium and the antenna array;
• estimate the delay between the plurality of transmitted signals and the plurality of signals reflected from the at least one object, wherein the delay is estimated using a dedicated frequency sub-band of the received signals;
• estimate the location of the plurality of antennas at each transmitting time;
• and
• determine whether there is at least one object within a target medium.