Patent ID: 9713434
Date: 2017-07-25
CPC Classifications: A61B,G01S

Claim:
1. A wearable sensor for detecting a signal corresponding to an artery's diameter, comprising: a first antenna configured for transmitting frequency modulated microwave signals whose frequencies span an ultra wideband into a body part containing the artery; a frequency modulated oscillator; a mixer configured to mix signals generated by said oscillator that are coupled to an input of said mixer from an output of said oscillator and reflected signals received by said first antenna or a second antenna that contain reflections of said frequency modulated microwave signals by tissue in said body part, and to output the mixed signals; an analogue to digital converter configured to sample said mixed signals and to output sampled data; a transform for receiving said sampled data and transforming said output data from frequency domain to time domain, and splitting the sampled data into a plurality of bins, wherein each bin stores bin data that corresponds to a amplitude of reflected signal from tissue located at a unique depth in the body part; a signal processor configured to receive said bin data from said function processor, and to use said bin data to generate a signal corresponding to the artery's diameter, and a battery for powering the sensor.