Movement Detection in Non-los Environment Using Microwave

Microwave can be used as a source to detect any movement behind the barrier and it paves way for many unknown intrusion similar to the movement detection in Line of Sight (LOS) environment by passive infrared sensors. Microwave frequencies can penetrate the barrier to gather information in non LOS environment. However the insight about the situation of a person behind the opaque medium will always be helpful in critical situations like, a building on fire, search and rescue operations, etc. The quality and reliability of the system is defined by the nature of the barrier characteristics such as the thickness and material behind which movement detection is carried out. This paper deals with the movement detection in non LOS environment which is carried out in the X-band for the barriers such as plywood, vitrified tile & acrylic sheet with different thickness. The detection is confirmed through the time domain signal obtained from the reflected signal for an ideal, standing and walking condition of human subject. . The variations are observed and acquired through a Digital Storage Oscilloscope. Human characteristics like breathing are analyzed through the time domain observations. Keywords— X band microwave detection system, plywood, vitrified tile, acrylic sheet, movement detection, breathing signal.