A radar apparatus for detecting a life-sign of a subject, comprising: - a single radar unit containing: i) a transmitter system for emitting a first transmission electromagnetic beam and a second transmission electromagnetic beam into mutually different directions, wherein the first transmission electromagnetic beam is for being directed to the chest and/or the abdomen of the subject, and wherein the second transmission electromagnetic beam is for being directed to a superficial artery structure of the subject, and ii) a receiving system for receiving a combination of first beam data from the first transmission electromagnetic beam reflected from the chest and/or the abdomen and second beam data from the second transmission electromagnetic beam reflected from the superficial artery structure; - a redirector for redirecting the second transmission beam after emission by the single radar unit as a redirected beam towards the superficial artery structure, and for redirecting the beam reflected by the superficial artery structure in the reverse direction towards the receiver system; and - a processor unit arranged for separating the first beam data from the second beam data based on different propagation times of the respective beams, for processing the first beam data retrieving breath activity information, and for processing the second beam data retrieving heart activity information. - a single radar unit containing: i) a transmitter system for emitting a first transmission electromagnetic beam and a second transmission electromagnetic beam into mutually different directions, wherein the first transmission electromagnetic beam is for being directed to the chest and/or the abdomen of the subject, and wherein the second transmission electromagnetic beam is for being directed to a superficial artery structure of the subject, and ii) a receiving system for receiving a combination of first beam data from the first transmission electromagnetic beam reflected from the chest and/or the abdomen and second beam data from the second transmission electromagnetic beam reflected from the superficial artery structure; i) a transmitter system for emitting a first transmission electromagnetic beam and a second transmission electromagnetic beam into mutually different directions, wherein the first transmission electromagnetic beam is for being directed to the chest and/or the abdomen of the subject, and wherein the second transmission electromagnetic beam is for being directed to a superficial artery structure of the subject, and ii) a receiving system for receiving a combination of first beam data from the first transmission electromagnetic beam reflected from the chest and/or the abdomen and second beam data from the second transmission electromagnetic beam reflected from the superficial artery structure; - a redirector for redirecting the second transmission beam after emission by the single radar unit as a redirected beam towards the superficial artery structure, and for redirecting the beam reflected by the superficial artery structure in the reverse direction towards the receiver system; and - a processor unit arranged for separating the first beam data from the second beam data based on different propagation times of the respective beams, for processing the first beam data retrieving breath activity information, and for processing the second beam data retrieving heart activity information.