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d
i
n
g
an
t
e
n
n
a g
ai
n
d
i
r
ect
i
v
i
t
y
an
d
b
an
d
w
i
d
t
h
[
13]
.
T
h
e
D
G
S
m
e
t
h
od i
s
e
m
pl
o
y
e
d a
s
w
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d f
or
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f
r
o
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nt
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nna
gr
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nd
p
l
a
ne
[
14]
[
15]
.
T
h
e p
r
es
en
t
w
o
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k
ai
m
s
t
o
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r
o
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t
en
n
a,
p
r
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en
t
ed
i
n
a r
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t
p
ap
er
.
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h
e
pr
op
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d m
ode
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s
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a
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ul
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pl
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c
y
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ds
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pa
r
a
m
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c
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t
u
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f
or
t
h
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s
l
ot
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di
m
e
n
s
i
ons
a
n
d pos
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t
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o
n
a
r
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c
a
r
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u
t
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n
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pe
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l
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pa
r
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a
no
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nd
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ur
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opos
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d m
ode
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s
pr
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e
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t
e
d.
2.
ANT
E
NNA
D
ES
I
G
N
C
ir
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u
la
r
m
ic
r
o
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tr
ip
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a
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a
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n
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a
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r
e
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v
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te
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a
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m
o
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e
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te
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t
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t
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a
n
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y
m
a
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h
e
pe
r
i
m
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t
e
r
of
t
he
an
t
en
n
a [
1
6
]
.
C
o
ns
i
d
e
r
i
ng
f
r
i
ngi
n
g
f
i
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l
d
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t
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[
17]
:
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1
+
2
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2
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1
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7
7
2
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(1
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[
18
].
T
ab
l
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pr
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s
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m
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1.
P
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R
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I
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8708
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[
1]
S
.
R
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n,
T
he
o
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.
R
a
p
pa
por
t
,
E
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k
i
p
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illim
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s
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I
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E
E
.
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14;
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ol
10
2(
3)
:
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66
-
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5
[
2]
J
. Z
h
a
n
, J
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n
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3]
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4]
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36
[
5]
R
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s
h
r
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c
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93
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7;
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7(
4)
:
20
27
-
20
35
[
1
2]
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1
5]
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15;
V
ol
.
6(
4)
[
1
7]
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. G
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9]
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ng
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E
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–
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07
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2
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.
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6
[
2
1]
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.
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.
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ul
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201
7,
pp
904
-
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09.
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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Evaluation Warning : The document was created with Spire.PDF for Python.