Extra wide band 3D patch antennae system design for remote vital sign Doppler radar sensor detection

A very wide band (from 900 MHz to 12 GHz), enhancing beam capacity patch antennae system is developed in FR4 substrate with a dielectric constant 4.4 and 1.2 mm of height for vital detection purposes. This work focuses on development of 3D-orthogonal patch antennae to detect the respiratory beat at different frequencies. A transceiver antennae is proposed that allows to detect the thorax displacement at four band of frequencies, from L band to X band. The measurement shows that the proposed antennae can operate in extra wide band frequency to detect the vital signs.