Next, a 2 mm human body mesh obtained using VariPose is imported into XFDTD as a mesh

object, and the patch antenna is inserted into the body mesh. Figure 5 shows a slice through the

body mesh with the patch antenna. The patch is located a few mm inside the chest close to the

front of the body. In this figure, the body is looking away from the reader, that is, into the page.

Figure 5: Patch antenna inserted into the

Figure 6: Far-zone radiation pattern for

body mesh

the patch antenna inside the body

After the calculation is completed, XFDTD finds the impedance of the patch antenna inside the

human body to be 4.05 + j 15.61 ohms with an efficiency of 0.23%. The far-zone radiation pat-

tern for the patch antenna inside

the body in the following figure

shows the reduction in gain due

to the loss in the body tissues.

The body is facing toward an an-

gle of 270 degrees with the (left)

shoulder containing the patch

toward an angle of 0 degrees as

shown in Figure 6. Figure 7 shows

a 3-D view of transient electric

fields external to the body mesh.

Figure 7: 3-D view of transient

electric fields external to the

body mesh

Figures 8, 9, and 10 (next page) show transient electric fields in various mesh slices for the

patch antenna inside the body. In Figure 10, the display of the body tissues and patch anten-

na is turned off to view the internal fields.

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