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Indian Institute of Technology (IIT) Roorkee 
A system and method for through wall imaging 
Dharmendra Singh, Bambam Kumar and Smitha Puthucheri 
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2019-02-06 
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Indian Institute of Technology (IIT) Roorkee 
A cost effective TWI system which has the capability to detect, identify and classify various living and non-living targets has been developed indigenously. The system is based on Stepped Frequency Continuous Wave (SFCW) radar concept and working from 1.5-3.5 GHz, which can provide good range resolution and cross range resolution, that can be used for imaging a target behind the wall. The scanning time to image the target is reduced by introducing the concept of array antenna and it is fabricated in our laboratory. The crosstalk in the antenna array is minimized by the coating of developed microwave absorber, which improved the image quality. An assembly of complete TWI system with developed algorithm and display system is designed and the prototype is fabricated. The developed TWI prototype is successfully evaluated for various targets like different dielectric materials as well as for living targets. 

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