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Feasibility study for non-contact heartbeat detection at 2.4 GHz and 60 GHz

Two new schemes for human non-invasive cardiopulmonary activity monitoring are demonstrated using microwave low power and non-contact Doppler sensors. The two systems, using direct conversion architecture and simple design, are demonstrated and tested at a distance of 1 m from the patient. The first one proposes a simple technique for direct measurement of heartbeat signal at 2.4 GHz while the second scheme improves detection sensitivity when operating at 60 GHz.