Patent ID: 8545413

Claim:
A non-contact apparatus for monitoring cardiopulmonary activity signals, comprising: a pulse-series generator configured to generate a series of probing pulses and a series of reference pulses, comprising: a sinusoidal-signal generator configured to generate a continuous sinusoidal signal; a switching-signal generator configured to generate a switching signal comprising: a clock generator configured to generate a clock signal; and a waveform shaper configured to adjust the time interval of the clock signal to generate the switching signal; and a switching device configured to turn on according to the switching signal such that the continuous sinusoidal signal can pass through the switching device to form high-frequency sinusoidal pulses; a transmitting antenna configured to transmit the probing pulses to a chest portion, wherein the chest portion scatters the probing pulses to generate a series of scattered pulses; a receiving antenna configured to receive the scattered pulses; a mixer including a first input port configured to receive the reference pulses and a second input port electrically connected to the receiving antenna to receive the scattered pulses; and a signal-processing module configured to generate the cardiopulmonary activity signals after the scattered pulses and the reference pulses are processed by the mixer, wherein the transmitting antenna and the receiving antenna are separate antennas.