New non-contact cardiac and respiratory gating method have been developed, which includes an antenna monitoring heart and respiration movement, and independent triggering pulse generation unit with signal processing software. The resonance frequency of the dipole antenna was tuned to around 550MHz on the chest. The triggering pulse generation unit detected and digitized the S11 signals from the antenna. IIR filter removed the low frequency component and a template matching technique was used to seek the triggering points at the inflection point of filtered waveform. As a result, the prospective gating cardiac imaging was successfully performed for volunteers.