The invention relates to a radar apparatus for detecting a life-sign of a subject, comprising a transmitter system for emitting a transmission electromagnetic beam to the chest and/or the abdomen of a subject, a receiving system for receiving first reflected electromagnetic beam data from the chest and/or the abdomen, and a processor unit for processing the first received beam data retrieving breath activity information. The transmitter system, the receiving system and the processor are further arranged for performing a radar measurement of a superficial artery structure, such as a wrist artery, an ankle artery, a carotid artery and/or the fontanel artery for retrieving heart activity information. Thereto, the a second transmission electromagnetic beam is directed towards the superficial artery structure, the first and the second transmission electromagnetic beam being transmitted from a single radar unit.