High-quality and complex anthropomorphic torso phantom. They are semi-solid in nature and constitute skin, subcutaneous fat, muscle, spinal column, visceral fat, and internal organ (heart). They are specifically designed to match real human obese abdomen at 500 MHz - 20 GHz, UWB frequency. They can be used for Microwave/Ultrasound Imaging, Testbed for cardiac/pulmonary monitoring, and Device development. They exhibit dielectric and mechanical stability over a long period of time. Non-toxic and benign in nature.