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W
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[
6
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,
[
7
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.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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20
21
:
9
2
1
-
929
922
Min
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MI
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[
8
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.
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lar
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a
n
ten
n
a
a
n
d
also
its
co
r
r
elatio
n
.
So
,
im
p
lem
en
tin
g
MI
MO
in
th
e
d
esig
n
o
f
s
m
ar
t
p
h
o
n
e
an
ten
n
as
is
v
er
y
ch
allen
g
i
n
g
as
in
in
cr
ea
s
in
g
th
e
n
u
m
b
er
o
f
an
ten
n
as,
th
e
is
o
latio
n
b
etwe
en
ea
ch
o
f
th
em
will
r
ed
u
ce
an
d
th
is
will
r
esu
lt
in
a
d
ec
r
ea
s
e
in
th
eir
ef
f
icien
cy
.
Hen
ce
ac
h
iev
i
n
g
h
ig
h
ef
f
icien
c
y
as
well
as
g
o
o
d
is
o
latio
n
in
th
e
M
I
MO
an
ten
n
a
is
a
v
er
y
cr
itical
ch
allen
g
e.
So
,
th
er
e
is
a
n
ee
d
to
d
ec
o
u
p
le
th
e
elem
en
ts
o
f
th
e
an
ten
n
a
to
im
p
r
o
v
e
th
e
is
o
latio
n
.
I
n
[
9
]
,
an
8
-
elem
en
t
PIFA
-
b
ased
MI
MO
an
ten
n
a
s
y
s
tem
was
p
r
o
p
o
s
ed
b
u
t
it
ca
n
c
o
v
er
o
n
ly
a
s
in
g
le
b
an
d
o
f
3
.
5
GHz
an
d
th
e
m
i
n
im
u
m
is
o
latio
n
p
o
s
s
ib
le
b
etwe
en
th
e
an
t
en
n
a’
s
e
lem
en
ts
was 7
.
4
d
B
.
So
m
e
m
o
r
e
r
esear
ch
is
d
o
n
e
th
at
p
r
o
v
id
es
g
o
o
d
s
o
l
u
tio
n
s
f
o
r
e
v
en
8
×8
MI
MO
s
y
s
tem
s
[
1
0
]
-
[
1
5
]
.
B
u
t
th
ese
ar
e
all
f
o
r
a
s
in
g
l
e
b
an
d
o
f
f
r
eq
u
en
cy
an
d
h
e
n
ce
ca
n
n
o
t
b
e
u
s
ed
in
5
G
c
o
m
m
u
n
icatio
n
s
.
5
G
co
m
m
u
n
icatio
n
n
ee
d
s
to
ad
d
r
ess
a
lo
t
m
an
y
n
ew
ap
p
licatio
n
s
an
d
n
ee
d
s
to
m
ee
t
th
e
n
ew
s
tan
d
ar
d
s
o
f
co
m
m
u
n
icatio
n
.
So
,
it
n
ee
d
s
m
u
ltip
le
f
r
e
q
u
en
c
y
r
an
g
es.
Du
e
to
th
is
,
it
n
ee
d
s
m
u
ltip
le
an
ten
n
as
th
at
ar
e
wo
r
k
in
g
in
d
if
f
er
en
t
f
r
e
q
u
en
cy
b
an
d
s
.
So
,
t
h
e
an
ten
n
as
wh
ich
ca
n
wo
r
k
in
m
u
ltip
le
b
an
d
s
wi
ll
b
e
m
o
r
e
p
r
ef
er
ab
le
in
s
m
ar
t
p
h
o
n
es
.
I
n
th
is
p
ap
er
,
a
MI
MO
an
ten
n
a
co
n
s
is
tin
g
o
f
f
o
u
r
an
ten
n
as
is
p
r
o
p
o
s
ed
.
T
h
e
p
r
o
p
o
s
ed
an
ten
n
a
ca
n
w
o
r
k
in
a
d
u
al
-
f
r
eq
u
e
n
cy
r
an
g
e,
th
at
is
,
it
n
o
t
o
n
ly
o
p
er
ates
in
t
h
e
f
r
eq
u
e
n
cy
r
a
n
g
e
o
f
3300
-
3
6
0
0
MH
z
b
u
t
also
in
th
e
r
an
g
e
o
f
(
4
8
0
0
-
5
0
0
0
)
MH
z.
Ag
ain
,
in
th
is
m
o
d
el,
th
e
f
o
u
r
an
ten
n
as
ar
e
alo
n
g
two
s
id
e
ed
g
es
o
f
th
e
s
m
ar
tp
h
o
n
e
an
d
h
e
n
ce
it
ca
n
also
p
r
o
v
id
e
1
2
d
B
o
f
is
o
latio
n
an
d
ca
n
b
e
u
s
ed
in
th
e
d
esig
n
o
f
a
f
u
ll
-
s
cr
ee
n
s
m
ar
t
p
h
o
n
e
a
n
ten
n
a,
w
h
ich
ca
n
b
e
i
m
p
lem
en
ted
in
th
e
f
u
l
l
-
s
cr
ee
n
s
m
ar
tp
h
o
n
e.
2.
RE
S
E
ARCH
M
E
T
H
O
D
T
h
e
d
esig
n
o
f
th
e
M
I
MO
an
te
n
n
a
in
C
ST
m
icr
o
wav
e
s
tu
d
io
[
1
6
]
,
[
1
7
]
f
o
r
d
u
al
-
b
a
n
d
is
d
iv
id
ed
in
t
o
th
e
d
esig
n
s
o
f
th
e
f
o
llo
win
g
s
u
b
d
iv
is
io
n
s
.
I
n
t
h
is
p
ap
er
,
a
MI
MO
an
ten
n
a
co
n
s
is
tin
g
o
f
f
o
u
r
an
ten
n
as
is
p
r
o
p
o
s
ed
.
T
h
e
p
r
o
p
o
s
ed
an
te
n
n
a
ca
n
wo
r
k
in
a
d
u
al
-
f
r
eq
u
en
cy
r
a
n
g
e,
th
at
is
,
it
n
o
t
o
n
ly
o
p
er
ates
in
th
e
f
r
eq
u
e
n
cy
r
a
n
g
e
o
f
3
3
0
0
-
3
6
0
0
MH
z
b
u
t a
ls
o
in
th
e
r
an
g
e
o
f
(
4
8
0
0
-
5
0
0
0
)
MH
z.
2
.
1
.
Desig
n o
f
s
ub
s
t
ra
t
e
T
h
e
s
u
b
s
tr
ate
is
f
ab
r
icate
d
f
ir
s
t
u
s
in
g
FR
4
s
u
b
s
tr
ate
[
1
8
]
.
T
h
is
m
ater
ial
h
as
a
r
elativ
e
p
er
m
itti
v
ity
(
)
o
f
4
.
3
an
d
elec
tr
ic
lo
s
s
tan
g
en
t
o
f
0
.
0
2
5
.
I
ts
d
im
en
s
io
n
s
ar
e
(
1
3
0
×
74
×
0
.
8
m
m
)
[
1
9
]
,
an
d
it
is
s
h
o
wn
in
Fig
u
r
e
1
(
a)
.
2
.
2
.
Desig
n o
f
g
ro
un
d o
n
s
ub
s
t
ra
t
e’
s
ba
ck
s
ide
T
h
e
g
r
o
u
n
d
i
s
f
a
b
r
i
c
a
t
e
d
u
s
i
n
g
c
o
p
p
e
r
a
n
d
i
s
p
l
a
c
e
d
a
t
t
h
e
b
a
c
k
o
f
t
h
e
s
u
b
s
t
r
a
t
e
[
2
0
]
,
[
2
1
]
.
I
t
s
d
i
m
e
n
s
i
o
n
s
a
r
e
t
h
e
s
a
m
e
a
s
t
h
a
t
o
f
t
h
e
s
u
b
s
t
r
a
t
e
b
u
t
w
i
t
h
a
t
h
i
c
k
n
e
s
s
o
f
0
.
0
3
5
m
m
,
i
.
e
.
,
(
1
3
0
×
7
4
×
0
.
8
m
m
)
.
2
.
3
.
Desig
n o
f
s
ide f
ra
m
es o
f
P
CB
On
e
v
er
tical
s
id
e
f
r
am
e
o
f
p
r
in
ted
cir
cu
it
b
o
ar
d
(
PC
B
)
is
f
ab
r
icate
d
f
ir
s
t
o
f
d
i
m
en
s
io
n
s
,
(
0
.
8
×
1
3
0
×
4
.
2
m
m
)
.
I
t
is
th
en
co
p
ied
to
th
e
o
t
h
er
s
id
e
at
7
4
.
0
8
m
m
[
2
2
]
.
T
h
en
th
e
h
o
r
izo
n
tal
s
id
e
s
u
b
s
tr
ate
is
d
esig
n
ed
o
f
d
im
en
s
io
n
s
(
7
4
×
0
.
8
×
4.
2
m
m
)
.
T
h
is
is
th
en
co
p
ied
to
th
e
o
t
h
er
s
id
e
at
1
3
0
.
0
8
m
m
[
2
3
]
.
2
.
4
.
Desig
n o
f
f
ro
nt
p
a
rt
o
f
a
nte
nn
a
o
n si
de
f
ra
m
es
T
h
e
f
r
o
n
t
p
a
r
t
o
f
th
e
an
te
n
n
a
co
n
s
is
ts
o
f
s
ev
er
al
b
r
ick
s
,
wh
i
ch
ar
e
d
esig
n
ed
o
n
e
af
te
r
an
o
t
h
er
u
s
in
g
co
p
p
er
as
m
ater
ial
an
d
th
e
n
ar
e
ad
d
ed
to
g
iv
e
a
co
m
p
lete
p
i
ctu
r
e
as
s
h
o
wn
in
Fig
u
r
e
1
(
b
)
.
T
h
e
d
im
en
s
io
n
s
o
f
ea
ch
p
ar
ts
ar
e:
(
0
.
0
3
5
×
1
7
.
7
×
1
m
m
)
;
(
0
.
0
3
5
×
1
.
5
×
1
.
5
m
m
)
;
(
0
.
0
3
5
×
1
0
×
0
.
9
m
m
)
;
(
0
.
0
3
5
×
1
.
5
×
2
.
9
m
m
)
;
(
0
.
0
3
5
×
1
6
.
2
×
1
m
m
)
[
2
4
]
.
(
a)
(
b
)
Fig
u
r
e
1
.
(
a
)
Th
e
m
ain
s
u
b
s
tr
a
te
o
f
th
e
an
te
n
n
a
an
d
(
b
)
Fro
n
t v
iew
o
f
th
e
a
n
ten
n
a
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4
7
5
2
C
o
mp
a
ct
MIMO
a
n
ten
n
a
u
s
in
g
d
u
a
l
-
b
a
n
d
fo
r
fift
h
-
g
e
n
era
tio
n
mo
b
ile
…
(
Deb
a
n
i P
r
a
s
a
d
Mis
h
r
a
)
923
2
.
5
.
F
ee
din
g
pro
ce
s
s
T
h
e
b
en
d
lin
e
in
F
ig
u
r
e
1
(
b
)
s
h
o
ws
th
e
f
ee
d
.
I
ts
d
im
en
s
io
n
s
ar
e
(
4
×1
.
5
×
0
.
0
3
5
m
m
)
.
W
e
will
u
s
e
a
cy
lin
d
er
f
o
r
f
ee
d
in
g
o
n
th
e
m
ain
g
r
o
u
n
d
wh
o
s
e
o
u
ter
r
ad
iu
s
is
0
.
1
m
m
[
2
5
]
,
[2
6
]
,
an
d
i
s
m
ad
e
o
f
v
ac
u
u
m
m
ate
r
ial
as sh
o
wn
in
F
ig
u
r
e
2
(
a)
.
T
h
e
a
n
ten
n
a
is
f
ed
b
y
t
h
e
m
ain
g
r
o
u
n
d
.
2
.
6
.
Desig
n o
f
ba
c
k
pa
rt
o
f
a
nte
nn
a
o
n si
de
f
ra
m
es
T
h
e
b
ac
k
p
ar
t
o
f
th
e
an
ten
n
a
co
n
s
is
ts
o
f
2
b
r
ic
k
s
,
wh
i
ch
ar
e
d
esig
n
ed
a
n
d
th
e
n
ad
d
ed
as
s
h
o
wn
in
F
ig
u
r
e
2
(
b
)
.
T
h
e
d
im
en
s
io
n
s
o
f
ea
ch
p
a
r
t a
r
e
[
2
7
]
: (
0
.
0
3
5
×1
×4
.
2
m
m
)
,
an
d
(
0
.
0
3
5
×
4
.
4
×
2
m
m
)
.
(
a)
(
b
)
Fig
u
r
e
2
.
(
a
)
Feed
in
g
p
ar
t
o
f
t
h
e
an
ten
n
a
a
nd
(
b
)
B
ac
k
p
ar
t o
f
th
e
an
ten
n
a
2
.
7
.
T
ra
ns
f
o
rm
ing
t
he
a
nte
nn
a
t
o
t
he
re
m
a
ini
ng
3
s
ides
a
nd
a
lig
nin
g
Af
ter
th
e
f
ab
r
icatio
n
o
f
o
n
e
a
n
ten
n
a,
it
is
co
p
ie
d
to
th
e
o
th
er
3
ed
g
es
o
f
th
e
s
u
b
s
tr
ate
an
d
is
alig
n
ed
s
u
ch
th
at
th
e
f
ee
d
in
g
p
ar
t
is
f
ac
in
g
in
s
id
e
[
2
8
]
,
an
d
it
is
s
h
o
wn
in
Fig
u
r
e
3
.
T
h
is
co
m
p
le
tes
th
e
f
ab
r
icatio
n
.
T
h
e
PC
B
f
ab
r
icate
d
is
o
f
s
ize
(
1
3
0
×
7
4
m
m
)
wh
ich
is
ap
p
r
o
x
im
ately
th
e
s
am
e
as
th
at
o
f
a
s
m
ar
tp
h
o
n
e
o
f
5
in
ch
es.
T
h
en
th
e
4
an
ten
n
a
s
h
av
in
g
th
e
s
am
e
s
t
r
u
ctu
r
e
a
n
d
d
im
en
s
io
n
s
,
(
3
.
9
×
1
7
m
m
)
ar
e
f
ab
r
icate
d
o
n
it
s
u
ch
th
at
t
h
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r
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ec
t
to
th
e
d
ir
ec
tio
n
awa
y
f
r
o
m
th
e
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ten
n
a.
I
t
is
th
e
f
u
n
ctio
n
o
f
th
e
an
g
le
o
f
ar
r
iv
al.
Hen
c
e,
th
e
v
ar
iatio
n
in
th
e
p
o
wer
r
ad
iatio
n
is
also
a
f
u
n
ctio
n
o
f
p
h
i
an
d
th
eta.
At
p
h
i
=9
0
,
th
e
p
o
s
itio
n
o
f
n
u
lls
an
d
m
a
x
im
a
o
f
all
th
e
an
ten
n
as
ca
n
b
e
o
b
s
er
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e
d
f
r
o
m
th
e
r
a
d
iatio
n
p
atter
n
s
h
o
wn
in
Fig
u
r
e
8
.
Dir
ec
tiv
ity
m
ea
s
u
r
es
th
e
p
atter
n
o
f
an
t
en
n
a
r
ad
iatio
n
i
n
a
s
p
ec
if
ied
d
ir
ec
tio
n
in
s
p
ac
e
I
n
th
is
f
ig
u
r
e
th
e
d
ir
ec
tiv
ity
o
f
all
th
e
f
o
u
r
an
ten
n
as
in
b
o
th
lo
wer
an
d
h
ig
h
er
f
r
eq
u
e
n
cy
b
a
n
d
s
h
as b
ee
n
d
em
o
n
s
tr
ated
.
(
a
)
(
b
)
Fig
u
r
e
8
.
Dir
ec
tiv
ity
o
f
(a
)
3
.
4
GHz
b
an
d
in
p
o
lar
f
o
r
m
an
d
(
b
)
4
.
8
GHz
b
an
d
in
p
o
lar
f
o
r
m
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
2
4
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No
.
2
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em
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er
20
21
:
9
2
1
-
929
926
4.
CO
NCLU
SI
O
NS
A
MI
MO
an
ten
n
a
with
a
d
u
a
l
-
b
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d
f
ea
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at
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n
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k
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o
th
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3
.
3
-
3
.
6
)
MH
z
f
r
e
q
u
e
n
cy
r
an
g
e
an
d
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4
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-
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z
f
r
eq
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en
cy
r
an
g
e
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as
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esig
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s
u
cc
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lly
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s
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e
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h
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ed
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h
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en
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e
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h
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ce
5
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co
m
m
u
n
icatio
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wh
ich
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e
ed
s
to
wo
r
k
in
m
u
ltip
le
f
r
e
q
u
en
c
y
r
an
g
es to
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d
r
ess
a
lo
t m
an
y
n
e
w
ap
p
licatio
n
s
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d
to
m
ee
t
th
e
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ew
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d
a
r
d
s
o
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m
m
u
n
icatio
n
.
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h
is
will
also
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elp
i
n
p
r
o
v
id
i
n
g
a
s
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le
wir
eless
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n
n
ec
tio
n
is
o
f
ten
d
if
f
icu
lt
to
r
ea
c
h
lo
ca
ti
o
n
s
.
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o
win
g
th
e
r
e
q
u
ir
em
e
n
ts
o
f
5
G
s
u
p
p
o
r
tin
g
s
m
ar
t
p
h
o
n
es,
th
is
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ten
n
a
is
d
esig
n
ed
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e
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co
m
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ar
ati
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ely
s
m
all
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ize,
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etter
im
p
ed
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ce
m
atch
in
g
,
less
r
ef
lectio
n
co
ef
f
icien
t,
m
o
r
e
tr
an
s
m
is
s
io
n
co
ef
f
icien
t,
m
o
r
e
VSW
R
,
an
d
r
elativ
ely
h
ig
h
er
is
o
l
atio
n
.
I
n
th
e
n
ea
r
f
u
tu
r
e,
o
n
e
ca
n
p
r
o
ce
e
d
with
a
s
im
ilar
ty
p
e
o
f
f
r
am
ew
o
r
k
with
m
o
r
e
n
u
m
b
e
r
a
n
ten
n
as
an
d
h
en
ce
ca
n
f
u
r
t
h
er
i
n
cr
e
ase
th
e
d
ata
r
ate
a
n
d
th
e
co
n
v
e
r
g
in
g
ar
ea
.
AP
E
NDI
X
(
a)
(
b
)
(
c)
Fig
u
r
e
7
.
Far
f
ield
g
ain
s
im
u
lat
io
n
:
(
a)
f
o
r
3
.
4
GHz
b
a
n
d
an
d
to
t
al
ef
f
icien
cy
o
f
-
1
.
5
3
7
d
B
,
(
b
)
f
o
r
3
.
4
GHz
b
an
d
a
n
d
to
tal
ef
f
icien
cy
o
f
-
1
.
5
3
9
d
B
,
(
c)
f
o
r
3
.
4
GHz
b
a
n
d
an
d
to
tal
ef
f
icien
c
y
o
f
-
1
.
5
3
8
d
B
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4
7
5
2
C
o
mp
a
ct
MIMO
a
n
ten
n
a
u
s
in
g
d
u
a
l
-
b
a
n
d
fo
r
fift
h
-
g
e
n
era
tio
n
mo
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ile
…
(
Deb
a
n
i P
r
a
s
a
d
Mis
h
r
a
)
927
(
d
)
(
e)
(f)
(
g
)
Fig
u
r
e
7
.
Far
f
ield
g
ain
s
im
u
lat
io
n
,
(
d
)
f
o
r
3
.
4
GHz
b
an
d
an
d
r
ad
iatio
n
ef
f
icie
n
cy
o
f
-
0
.
8
5
6
2
d
B
,
(
e
)
f
o
r
4
.
8
G
H
z
b
a
n
d
a
n
d
t
o
t
a
l
e
f
f
i
c
i
e
n
c
y
o
f
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5
.
3
7
0
d
B
,
(
f
)
.
f
o
r
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.
8
G
H
z
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n
d
a
n
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ci
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y
o
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5
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3
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d
B
,
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)
f
o
r
4
.
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GHz
b
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d
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d
to
tal
ef
f
icien
cy
o
f
-
5
.
3
6
6
d
B
(
co
n
tin
u
e)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci,
Vo
l.
2
4
,
No
.
2
,
No
v
em
b
er
20
21
:
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2
1
-
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928
(
h
)
Fig
u
r
e
7
.
F
ar
f
ield
g
ain
s
im
u
lat
io
n
;
(
h
)
f
o
r
4
.
8
GHz
b
an
d
a
n
d
to
tal
ef
f
icien
cy
o
f
-
5
.
3
7
1
Db
(
co
n
tin
u
e)
ACK
NO
WL
E
DG
E
M
E
NT
S
T
h
is
r
esear
ch
wo
r
k
was f
u
n
d
e
d
b
y
“
W
o
o
s
o
n
g
Un
iv
e
r
s
ity
’
s
Aca
d
em
ic
R
esear
ch
Fu
n
d
in
g
-
2021
”
.
RE
F
E
R
E
NC
E
S
[1
]
J.
G
.
An
d
re
ws
e
t
a
l.
,
“
Wh
a
t
will
5
G
b
e
?
,
”
IEE
E
J
o
u
rn
a
l
o
n
S
e
lec
t
e
d
Are
a
s
i
n
C
o
mm
u
n
ica
ti
o
n
s
,
v
o
l
.
3
2
,
n
o
.
6
,
p
p
.
1
0
6
5
-
1
0
8
2
,
J
u
n
.
2
0
1
4
,
d
o
i
:
1
0
.
1
1
0
9
/JS
AC.
2
0
1
4
.
2
3
2
8
0
9
8
.
[2
]
C.
N.
Hu
,
K.
P
e
n
g
,
C
.
H.
Yu
,
T
.
W.
Hs
a
io
,
a
n
d
D.
P
.
L
in
.
“
De
sig
n
o
f
a
m
m
-
Wav
e
M
icro
strip
A
n
ten
n
a
Arra
y
,
”
In
ter
n
a
t
io
n
a
l
W
o
rk
sh
o
p
o
n
El
e
c
tro
ma
g
n
e
ti
c
s:
Ap
p
li
c
a
ti
o
n
s
a
n
d
S
t
u
d
e
n
t
In
n
o
v
a
t
io
n
Co
m
p
e
ti
ti
o
n
(i
W
EM
)
,
Hs
in
c
h
u
,
2
0
1
5
,
p
p
.
1
-
2
,
d
o
i:
1
0
.
1
1
0
9
/
iW
E
M
.
2
0
1
5
.
7
3
6
5
0
3
0
.
[3
]
A.
S
a
lh
,
L.
Au
d
a
h
,
N.
S.
M
.
S
h
a
h
,
a
n
d
S
.
A.
Ha
m
z
a
h
,
“
Ad
a
p
ti
v
e
An
ten
n
a
S
e
lec
ti
o
n
a
n
d
P
o
w
e
r
Allo
c
a
ti
o
n
in
Do
wn
li
n
k
M
a
ss
iv
e
M
IM
O
S
y
st
e
m
s,”
J
o
u
rn
a
l
o
f
El
e
c
trica
l
a
n
d
Co
mp
u
ter
En
g
in
e
e
rin
g
(IJ
ECE
)
,
v
o
l.
7
,
n
o
.
6
,
p
p
.
3
5
2
1
-
3
5
2
8
,
De
c
.
2
0
1
7
,
d
o
i
:
1
0
.
1
1
5
9
1
/
ij
e
c
e
.
v
7
i
6
.
p
p
3
5
2
1
-
3
5
2
8
.
[4
]
Y.
L.
Ba
n
,
Z.
X.
Ch
e
n
,
Z
.
Ch
e
n
,
K.
Ka
n
g
,
a
n
d
J.
L.
W
.
Li
,
“
De
c
o
u
p
led
Cl
o
se
ly
S
p
a
c
e
d
He
p
tab
a
n
d
An
ten
n
a
Arra
y
fo
r
W
WAN/L
TE
S
m
a
rtp
h
o
n
e
Ap
p
li
c
a
ti
o
n
s
,
”
IEE
E
A
n
ten
n
a
s
a
n
d
W
ire
les
s
Pro
p
a
g
a
ti
o
n
L
e
tt
e
rs
,
v
o
l.
1
3
,
p
p
.
3
1
-
3
4
,
2
0
1
4
,
d
o
i:
1
0
.
1
1
0
9
/
LAW
P
.
2
0
1
3
.
2
2
9
5
6
2
3
.
[5
]
Y.
L.
Ba
n
,
C.
Li
,
C.
Y.
D.
S
im,
G
.
Wu
,
a
n
d
K.
L.
Wo
n
g
,
“
4
G
/5
G
M
u
lt
ip
le
An
te
n
n
a
s
fo
r
F
u
tu
re
M
u
lt
i
-
M
o
d
e
S
m
a
rtp
h
o
n
e
Ap
p
li
c
a
ti
o
n
s
,
”
IEE
E
Acc
e
ss
,
v
o
l.
4
,
p
p
.
2
9
8
1
-
2
9
8
8
,
2
0
1
6
,
d
o
i:
1
0
.
1
1
0
9
/ACCE
S
S
.
2
0
1
6
.
2
5
8
2
7
8
6
.
[6
]
Y.
Ra
h
a
y
u
,
J.
Wi
jay
a
,
a
n
d
E.
S
y
a
fit
ri,
“
C
h
a
ra
c
teristics
M
IM
O
2
x
4
An
te
n
n
a
f
o
r
5
G
Co
m
m
u
n
ica
ti
o
n
S
y
ste
m
,
”
T
EL
KOM
NIKA
(
T
e
lec
o
mm
u
n
ic
a
ti
o
n
,
Co
m
p
u
ti
n
g
,
El
e
c
tro
n
ics
a
n
d
C
o
n
tr
o
l)
,
v
o
l
.
1
6
,
n
o
.
4
,
p
p
.
1
5
0
8
-
1
5
1
4
,
Au
g
.
2
0
1
8
,
d
o
i:
1
0
.
1
2
9
2
8
/t
e
l
k
o
m
n
ik
a
.
v
1
6
i4
.
8
3
7
7
.
[7
]
N.
I.
A.
Ish
a
k
,
N.
S
e
m
a
n
,
a
n
d
T
.
H.
Ch
u
a
,
“
An
ten
n
a
a
rra
y
d
e
sig
n
with
re
c
tan
g
u
lar
rin
g
slo
t
f
o
r
5
G
te
c
h
n
o
l
o
g
y
,
”
T
EL
KOM
NIKA
(
T
e
lec
o
mm
u
n
ic
a
ti
o
n
,
Co
m
p
u
ti
n
g
,
El
e
c
tro
n
ics
a
n
d
C
o
n
tr
o
l)
,
v
o
l
.
1
7
,
n
o
.
5
,
p
p
.
2
2
5
8
-
2
2
6
7
,
Oc
t.
2
0
1
9
,
d
o
i:
1
0
.
1
2
9
2
8
/t
e
l
k
o
m
n
ik
a
.
v
1
7
i
5
.
1
2
8
1
6
.
[8
]
K.
L.
Wo
n
g
,
C.
Y.
Tsa
i
,
a
n
d
J.
Y.
Lu
,
“
Two
a
sy
m
m
e
tri
c
a
ll
y
m
i
rro
re
d
g
a
p
-
c
o
u
p
le
d
l
o
o
p
a
n
ten
n
a
s
a
s
a
c
o
m
p
a
c
t
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[9
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1
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l.
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2
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h
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.
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ra
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.
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tu
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.
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u
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ter
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4
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929
[1
5
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Li
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6
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7
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.
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[1
8
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D.
Wu
,
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.
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C
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9
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n
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2
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laz
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3
]
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u
,
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T.
Lee
,
a
n
d
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.
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h
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g
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4
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[2
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[2
6
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Du
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,
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[2
7
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ll
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.
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u
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tara
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[2
8
]
A.
Dia
ll
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.
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x
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,
P
.
L.
T
h
u
c
,
R.
S
tara
j
,
a
n
d
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.
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ss
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s,
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h
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tw
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ten
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stru
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t
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m
u
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ica
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d
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term
in
a
ls,”
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M
icr
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w.
An
te
n
n
a
s
Pr
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.
[2
9
]
Y.
Ra
h
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y
u
,
I.
P
.
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a
ri,
D.
I.
Ra
m
a
d
h
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n
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a
h
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ter
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m
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ter
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(I
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,
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.
[3
0
]
A.
S
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n
g
a
l
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d
D.
Ke
d
ia,
“
P
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rfo
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m
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ten
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ts:
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rg
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c
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c
ti
v
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,
”
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o
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l
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m
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)
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.
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.
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.
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