Biomedical Engineering Reference
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Frequency (GHz)
FIGURE 5.18
Effect of small holes sizes.
Frequency (GHz)
FIGURE 5.19
Effect of adjacent hole space.
explained in below under effect of permeability. To summarize the theoretical
results, by simply punching holes in the rubber ferrite: (i) the matching fre-
quency characteristic is shifted toward a higher frequency region as the hole
size increases and (ii) the matching frequency characteristic is shifted toward
a higher frequency region as the adjacent hole distance decreases. A general
tendency of the present matching frequency characteristics is illustrated in
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