Biomedical Engineering Reference
In-Depth Information
Fig. 6
Geometry of the
grounded co-planar
waveguide (GCPW) to SL
transition (from [
10
],
reprinted with permission
from IEEE)
not improved. The antenna is well matched and the antenna gain can be improved
significantly when
w
p
= 0.8 and 1.4 mm. But, when the width of the soft-surface
structure is big enough to affect the antenna radiation, the impedance becomes worse
again. After optimization, considering the simulated |
S
11
| and gain, the value of
w
p
is chosen to be 1.4 mm.
The Effect of the Soft-Surface Structure Location
To understand the effectiveness of the soft-surface structure location, we simulated
the |
S
11
| and gain of the antenna array for three different types of the soft-surface
structure locations: along
x
-axial as the Fig.
8
a, along
y
-axial as the Fig.
8
b, and
along both
x
-axial and
y
-axial as the Fig.
8
c, respectively.
Fig. 7
Comparison of simulated |
S
11
| and gain with different
w
p
.
a
Simulated |
S
11
|,
b
Simulated
gain (from [
10
], reprinted with permission from IEEE)
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