Figure 4: Image a is the 3D knee model and orientation of each test to the antenna (1). Image b is the water only based phantom and shows a uniform SAR at all height, angle, and radius. Image c is the SAR of the knee phantom and shows a large SAR on the MCL with a low SAR on every other component. Image d is the knee phantom placed into the water cylinder in figure b and shows increased SAR in the cartilage and anterior locations of the femur and tibia.

Figure 2: SAR Profiles of 0.1 meter edge length water solutions (1) being excited by an antenna at 425 MHz(2). In images c-d a 8 mm nylon rectangle is between the water and the antenna (3) and a 0.8 mm rectangle(4) in figures e-f. When compared to image b the SAR maps d and f show that when Nylon is 8 cm or 0.8 mm the Nylon decreases the Maximum SAR in the water in no noticeable way. The SAR in the image d model shows that the SAR in the Nylon is very low and will prevent heating of the Nylon.