 
     
                                The low-power radar module microwave induction sensor uses the Doppler principle to emit high-frequency electromagnetic waves through the antenna
 
                                The low-power radar module microwave induction sensor uses the Doppler principle to transmit high-frequency electromagnetic waves through the antenna
 
                                The low-power radar module microwave induction sensor uses the Doppler principle to transmit high-frequency electricity through an antenna.