Performance of an ultra wideband radar for detection of water accumulation in the human bladder

This paper presents an Impulse Radio Ultra Wideband (IR-UWB) radar for detecting water accumulation in the human bladder. The goal is to monitor the level of urine in patients who suffer from urinary incontinence. This is achieved by detecting the reflected UWB signals from the boundaries of human tissues such as muscle and urine. The reflection properties are investigated both in a simulator with a bladder model and through measurements with a phantom model. The performance of the vivaldi antenna is investigated with regards to the pulse distortion due to the near field effect and signal attenuation in the far field. The simulation and the measurement results show the potential of water detection of the human bladder by using UWB pulses.

[1]  R.S. Thoma,et al.  UWB short-range radar sensing - The architecture of a baseband, pseudo-noise UWB radar sensor , 2007, IEEE Instrumentation & Measurement Magazine.

[2]  R. W. Lau,et al.  The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues. , 1996, Physics in medicine and biology.

[3]  Werner Wiesbeck,et al.  EURASIP Journal on Applied Signal Processing 2005:3, 296–305 c ○ 2005 Hindawi Publishing Corporation Influence of the Antennas on the Ultra-Wideband Transmission , 2002 .

[4]  Thomas Zwick,et al.  Ultra wideband radar for water detection in the human body , 2010, German Microwave Conference Digest of Papers.

[5]  David J. Edwards,et al.  Ultra-wideband : antennas and propagation for communications, radar and imaging , 2006 .

[6]  E. M. Staderini,et al.  UWB radars in medicine , 2002 .

[7]  C Gabriel,et al.  The dielectric properties of biological tissues: I. Literature survey. , 1996, Physics in medicine and biology.

[8]  R. W. Lau,et al.  The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz. , 1996, Physics in medicine and biology.

[9]  Keqian Zhang,et al.  Electromagnetic Theory for Microwaves and Optoelectronics , 2007 .

[10]  Thomas Zwick,et al.  Ultra-wideband Signals for the Detection of Water Accumulations in the Human Body , 2010, BIOSIGNALS.

[11]  M.Y.W. Chia,et al.  Through-wall UWB radar operating within FCC's mask for sensing heart beat and breathing rate , 2005, 2005 European Microwave Conference.