T
E
L
K
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el
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ro
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o
n
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Vo
l
.
1
8
, N
o
.
5
,
O
ct
o
b
er
2020
, p
p
.
2328
~
2334
I
S
S
N
:
1693
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6930
,
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P
T
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2018
D
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:
10.
12928/
T
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K
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A
.
v1
8
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.
15953
2328
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T
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tr
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m
un
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t
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r
in
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ha
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ga
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it
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c
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nd
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rt
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n
f
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AB
S
T
RACT
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r
tic
le
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to
r
y
:
R
ecei
v
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F
e
b 29,
2020
R
e
vi
s
e
d A
pr
24,
2020
A
ccep
t
ed
M
a
y 10,
2020
A wi
de
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om
pa
c
t a
n
te
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na
w
it
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o B
a
n
dw
id
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h
a
nc
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m
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t te
c
hn
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s
int
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de
d f
or
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a
d
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ti
on a
p
pl
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a
t
io
ns i
s pr
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nte
d
.
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f
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tive
gr
ou
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str
u
c
t
ur
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(
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S
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is use
d t
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nc
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ba
nd
wi
dt
h a
nd c
o
m
plim
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ta
r
y
s
pl
it
r
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r
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so
na
t
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(
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S
R
R
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n use
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ge
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t
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se
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t f
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a
n
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ha
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ts
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tc
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n
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a
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ur
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e
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ts ha
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se
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o
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l
iz
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n
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ts
pe
r
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e
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si
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ul
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n
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m
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ve
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d
s
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C
o
m
p
act
CS
R
R
DGS
R
a
di
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lo
c
a
tio
n
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d
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T
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n
o
pe
n
ac
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e
s
s
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tic
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nde
r
the
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SA
lic
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n
se
.
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or
r
e
s
pon
di
n
g A
u
t
h
or
:
N
el
ap
at
i
A
n
an
d
a R
ao
,
D
e
pa
r
t
m
e
nt
of
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l
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c
t
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oni
c
s
a
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om
m
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a
t
i
on
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n
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ngi
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c
ha
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ga
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j
una
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ni
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s
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ol
l
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ngi
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c
hnol
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unt
ur
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A
ndh
r
a
P
r
a
de
s
h,
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ndi
a
.
E
ma
il:
an
an
d
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el
ap
at
i
@
g
m
ai
l
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co
m
1.
I
NT
RO
DUC
T
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O
N
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e o
f
t
h
e b
as
i
c
r
eq
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s
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de
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c
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de
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he
s
e
da
y
s
i
s
t
o ha
ve
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c
om
pa
c
t
s
t
r
uc
t
ur
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f
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e
ne
e
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t
a
nt
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w
i
t
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a
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y
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t
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de
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t
en
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,
t
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ove
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a
l
l
s
y
s
te
m s
iz
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w
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e
v
e
r
y
s
m
a
l
l
a
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t
c
a
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c
c
om
m
oda
t
e
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t
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t
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R
a
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ol
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he
s
e
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m
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s
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e
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N
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w
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Y
i
H
ong X
i
e
i
n
[
1]
pr
opos
e
d l
oa
di
ng
a
C
S
R
R
i
n
t
he
gr
ound pl
a
ne
f
or
dua
l
ba
nd ope
r
a
t
i
on
.
B
ut
B
ot
h
t
he
ba
nds
a
r
e
ve
r
y
na
r
r
ow
a
nd
r
e
s
ona
t
i
ng w
i
t
h
l
i
n
ear
p
o
l
ar
i
zat
i
o
n
.
M
o
h
am
m
ad
S
aeed
M
aj
ed
i
i
n
[
2
]
p
r
o
p
o
s
ed
i
nt
r
oduc
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w
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t
i
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m
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t
a
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V
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s
a
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t
a
ngul
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pa
t
c
h f
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dua
l
ba
nd ope
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on but
t
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m
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dt
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t
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ba
nds
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s
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B
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B
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nf
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Z
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i
n [
3
]
p
r
opos
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our
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nnul
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r
r
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l
ot
l
oa
de
d M
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C
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c
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nd ope
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ut
t
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10
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ur
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os
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dt
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t
pa
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nd
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w
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M
a
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s
e
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r
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r
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oa
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s
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ope
r
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t
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on
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act
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i
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H
ui
Z
ha
ng [
4]
pr
opos
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d a
n a
nt
e
nna
i
n w
hi
c
h t
w
o t
ype
s
of
C
S
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s
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r
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pr
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s
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nt
e
d of
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hi
c
h one
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s
pe
r
pe
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c
ul
a
r
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nd t
he
ot
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r
is
pa
r
a
l
l
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l
.
P
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pe
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ype
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f
ul
f
or
ge
ne
r
a
t
i
ng
dua
l
ba
nds
.
I
n t
h
i
s
w
a
y du
a
l
f
r
e
que
nc
y
of
ope
r
a
t
i
on
i
s
ge
ne
r
a
t
e
d.
I
n
g
en
er
a
l
,
CS
RR
s
t
r
u
ct
u
r
es
ar
e l
o
a
d
e
d i
n t
h
e
r
a
d
ia
tin
g
e
le
me
n
t.
B
u
t J
.
X
.
N
i
u
[
5
]
pr
opos
e
d a
ne
w
t
e
c
hni
que
o
f
l
oa
di
ng
a
C
S
R
R
i
n t
he
gr
ound pl
a
ne
f
or
dua
l
ba
nd ope
r
a
t
i
on.
B
ut
B
ot
h t
he
ba
nds
a
r
e
ve
r
y na
r
r
ow
a
nd
r
e
s
ona
t
i
ng w
i
t
h
l
i
n
ear
p
o
la
r
iz
a
tio
n
.
S
ev
er
al
s
i
n
g
l
e
-
l
a
ye
r
,
s
i
ngl
e
-
f
eed
C
S
R
R
l
o
ad
ed
an
t
en
n
a s
t
r
uc
t
ur
e
s
a
r
e
s
ugge
s
t
e
d f
or
dua
l
ba
nd
ope
r
a
t
i
on w
he
r
e
r
e
s
e
a
r
c
he
r
s
us
e
d C
S
R
R
e
i
t
he
r
f
or
l
oa
di
ng i
nt
o
t
he
pa
t
c
h or
i
nt
o t
he
g
r
ound pl
a
ne
.
H
ow
e
ve
r
,
t
he
r
e
por
t
e
d 10
-
dB
r
e
t
ur
n
l
os
s
ba
ndw
i
dt
h a
t
bo
t
h t
he
ba
nds
i
s
na
r
r
ow
.
T
hus
,
t
he
s
e
a
nt
e
nna
s
do not
s
e
r
ve
t
he
mo
d
er
n
-
d
ay
r
eq
u
i
r
em
en
t
s
[
6
-
25
]
.
F
o
r
a
ll th
e
a
bove
-
m
e
nt
i
one
d
t
e
c
hni
que
s
w
e
a
r
e
a
bl
e
t
o a
c
hi
e
ve
c
om
pa
c
t
ne
s
s
but
t
he
ba
ndw
i
dt
h
of
t
he
a
nt
e
nna
i
s
ve
r
y
l
ow
a
t
bot
h
t
h
e o
p
er
at
i
n
g
f
r
eq
u
en
ci
es
.
I
f
w
e can
d
es
i
g
n
a C
S
R
R
s
t
r
u
ct
u
r
e an
d
a D
G
S
s
t
r
u
ct
u
r
e s
u
ch
t
h
e g
en
er
at
ed
n
ew
f
r
e
que
nc
y by C
S
R
R
i
s
n
ear
er
t
o
t
h
e l
o
w
er
s
i
d
e o
f
f
unda
m
e
nt
a
l
f
r
e
que
nc
y of
t
he
a
nt
e
nna
a
nd
t
he
ge
ne
r
a
t
e
d ne
w
f
r
e
que
nc
y by D
G
S
i
s
ne
a
r
e
r
t
o t
he
uppe
r
s
i
de
of
f
u
n
d
am
en
t
al
f
r
eq
u
en
cy
o
f
t
h
e an
t
en
n
a t
h
en
w
e can
i
n
cr
eas
e
t
he
ba
ndw
i
dt
h of
t
he
a
nt
e
nna
a
nd t
hi
s
t
e
c
hni
que
i
s
pr
e
s
e
nt
e
d i
n t
hi
s
c
om
m
uni
c
a
t
i
on.
A
D
G
S
a
n
d
CS
RR l
o
a
d
e
d
c
om
pa
c
t
w
i
de
ba
nd a
nt
e
nna
i
s
pr
opos
e
d i
n t
h
i
s
c
om
m
uni
c
a
t
i
on t
o ove
r
c
om
e
a
l
l
t
he
s
e
dr
a
w
ba
c
ks
a
nd
s
e
r
ve
f
or
r
a
di
ol
oc
a
t
i
on
a
ppl
i
c
a
t
i
on.
2.
P
R
O
P
O
S
E
D ANT
E
NNA
A
w
i
de
ba
nd a
nt
e
nna
i
s
pr
e
s
e
nt
e
d i
n
t
hi
s
c
om
m
uni
c
a
t
i
on w
hi
c
h i
s
ha
vi
ng
co
m
p
act
ch
ar
act
er
i
s
t
i
c
a
n
d
c
a
n be
us
e
d f
or
t
he
r
a
di
ol
oc
a
t
i
on a
ppl
i
c
a
t
i
ons
.
A
b
as
i
c co
ax
f
eed
p
at
ch
an
t
en
n
a r
ad
i
at
i
n
g
at
X
-
ba
nd f
r
e
que
nc
y
of
10
G
H
z
i
s
l
oa
de
d w
i
t
h D
G
S
a
nd C
S
R
R
.
T
he
ove
r
a
l
l
s
i
z
e
of
t
he
a
nt
e
nna
i
s
15×
15×
1.
6
m
m
.
P
r
opos
e
d a
nt
e
nna
i
s
de
s
i
gne
d a
nd r
e
l
i
a
z
e
d on a
F
R
4 l
a
m
i
na
t
e
.
I
n t
he
ba
s
i
c
a
nt
e
nna
t
he
f
unda
m
e
nt
a
l
s
t
r
uc
t
ur
e
of
t
h
e r
ad
i
at
i
n
g
el
em
en
t
i
s
a
r
ect
an
g
u
l
ar
s
he
e
t
a
nd
t
he
gr
ound pl
a
ne
i
s
a
uni
f
o
r
m
s
t
r
uc
t
u
r
e
.
T
he
n i
n
t
he
n
e
xt
s
t
a
ge
t
he
r
a
di
a
t
i
ng e
l
e
m
e
nt
i
s
l
oa
de
d w
i
t
h t
he
C
S
R
R
s
t
r
uc
t
ur
e
t
o i
nc
r
e
a
s
e
t
he
ba
ndw
i
dt
h a
t
t
he
l
ow
e
r
s
i
de
of
t
he
r
e
s
ona
t
i
ng f
r
e
que
nc
y a
nd m
a
ki
ng
t
he
a
nt
e
nna
a
c
om
pa
c
t
one
.
A
nd
i
n t
he
f
ur
t
h
er
s
t
ag
e a D
G
S
i
s
l
o
ad
ed
i
n t
he
gr
ound
pl
a
ne
t
o i
nc
r
e
a
s
e
t
he
ba
ndw
i
dt
h o
f
t
h
e
a
nt
e
nna
a
t
t
he
hi
ghe
r
s
i
de
o
f
r
e
s
ona
t
i
ng f
r
e
que
nc
y m
a
ki
ng
t
he
a
nt
e
nna
a
w
i
de
ba
nd a
nt
e
nna
.
T
he
t
op
vi
e
w
a
nd
r
a
r
e
vi
e
w
of
f
unda
m
e
nt
a
l
a
nt
e
nna
a
r
e
s
how
n i
n
F
i
gu
r
e
1
(
a
)
a
nd
F
i
gur
e
1
(
b
)
.
P
a
t
c
h l
oa
de
d w
i
t
h C
S
R
R
s
t
r
uc
t
ur
e
i
s
pr
e
s
e
nt
e
d i
n
F
i
gur
e
1
(
c
)
a
nd t
he
C
S
R
R
s
t
r
uc
t
ur
e
i
s
pr
e
s
e
nt
e
d i
n t
he
F
i
gur
e
1
(
d
)
.
F
i
gur
e
1
(
e
)
s
how
s
t
he
a
nt
e
nna
gr
ound pl
a
ne
l
oa
de
d w
i
t
h
D
G
S
s
t
r
uc
t
ur
e
.
T
he
opt
i
m
i
z
e
d
f
i
na
l
di
m
e
ns
i
ons
of
t
he
pr
opos
e
d a
n
t
e
nna
a
r
e
pr
e
s
e
nt
e
d i
n t
he
T
ab
l
e
1.
T
he
de
s
i
gn e
qua
t
i
ons
f
or
cal
cu
l
at
i
n
g
t
h
e r
ect
an
g
u
l
ar
p
at
ch
a
r
e
gi
ve
n be
l
ow
:
(
1)
(
2)
(
3)
(
4)
(
5)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
1693
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6930
T
E
L
KOM
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1
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2020:
2328
-
2334
2330
(
a)
(
b)
(
c)
(
d)
(
e)
F
i
gur
e
1
.
B
as
i
c an
d
pr
opos
e
d
an
t
en
n
a s
t
r
u
ct
u
r
es
,
(a
)
t
op
v
i
ew
o
f
b
as
i
c an
t
en
n
a
,
(b
)
ra
re
v
i
e
w
of
b
as
i
c
a
nt
e
nna
,
(
c
)
an
t
en
n
a
pa
t
c
h l
oa
de
d w
i
t
h
C
S
R
R
,
(
d
)
CS
RR
,
a
nd
(e
)
a
nt
e
nna
g
r
ound
l
o
a
d
e
d
wi
t
h
DGS
T
ab
l
e
1
.
O
p
t
i
m
i
zed
an
t
en
n
a p
ar
am
et
er
s
P
ar
am
et
er
V
a
lu
e
(
mm)
a
15
b
6.1
c
7
d
2.8
e
1.4
f
0.4
g
1.8
h
5
i
2
j
4
k
8.6
3.
R
ES
U
LTS
A
ND ANAL
YS
I
S
F
i
gur
e
2 s
how
s
t
he
r
e
t
ur
n l
os
s
of
t
he
a
nt
e
nna
a
nd
F
i
gur
e
3 s
how
s
t
he
vol
t
a
ge
s
t
a
ndi
ng w
a
ve
r
a
t
i
on
of
t
he
a
nt
e
nna
s
.
F
r
om
F
i
gur
e
2
w
e can
o
b
s
er
v
e t
h
at
t
h
e
pr
opos
e
d
a
nt
e
nna
w
i
t
h
C
S
R
R
a
nd D
G
S
l
oa
de
d
i
s
ha
vi
ng
a
ba
ndw
i
dt
h of
3
.
4
G
H
z
a
nd
ha
s
s
how
n a
c
ons
i
de
r
a
bl
e
e
nha
nc
e
m
e
nt
i
n t
he
a
nt
e
nna
ba
ndw
i
dt
h w
he
n c
om
pa
r
e
d
w
i
t
h t
he
a
nt
e
nna
w
i
t
h
C
S
R
R
a
l
one
w
hi
c
h
i
s
ha
vi
ng
a
ba
ndw
i
dt
h o
f
1.
15
GHz
a
n
d
a
b
as
i
c p
at
ch
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t
en
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h
o
s
e
ba
ndw
i
dt
h i
s
0.
91
GHz
.
T
h
e
a
nt
e
nna
l
oa
de
d w
i
t
h
bot
h C
S
R
R
a
nd D
G
S
i
s
ha
vi
ng a
ba
ndw
i
dt
h
r
a
ngi
ng f
r
om
9.
01
G
H
z
t
o
12.
41
GHz
a
nd t
he
a
nt
e
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l
oa
de
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i
t
h C
S
R
R
i
s
ha
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ng a
ba
ndw
i
dt
h
r
a
ngi
ng
f
r
om
9
.
12
GHz
t
o
10.
27
G
H
z.
T
h
e b
as
i
c r
ec
t
a
ngul
a
r
pa
t
c
h a
nt
e
nna
i
s
ha
vi
ng a
ba
ndw
i
dt
h
r
a
ngi
ng
f
r
om
9
.
66
G
H
z
t
o 10
.
57
GHz
.
A
t
al
l
t
h
e ab
o
v
e
f
r
eq
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en
ci
es
t
h
e r
et
u
r
n
l
o
s
s
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al
u
e i
s
l
es
s
t
h
an
-
10
dB
w
hi
c
h i
s
t
he
i
m
pe
da
nc
e
ba
nd
w
i
dt
h of
t
h
e an
t
en
n
a.
V
S
W
R
pl
ot
of
t
he
pr
opos
e
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nt
e
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a
l
ong
w
i
t
h
ba
s
i
c
a
nt
e
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a
nd
C
S
R
R
l
oa
de
d a
nt
e
nna
i
s
p
r
e
s
e
nt
e
d
i
n t
he
F
i
gur
e
3.
T
h
e
a
nt
e
nna
l
oa
de
d w
i
t
h bot
h C
S
R
R
a
nd D
G
S
i
s
ha
vi
ng a
V
S
W
R
r
a
ngi
ng f
r
om
9.
0
1
GHz
t
o
12.
41
GHz
a
nd
t
he
a
nt
e
nna
l
oa
de
d
w
i
t
h
C
S
R
R
i
s
ha
vi
ng a
V
S
W
R
r
a
ngi
ng
f
r
o
m
9.
12
G
H
z
t
o
10.
27
GHz
.
T
h
e b
as
i
c r
ect
an
g
u
l
ar
p
at
ch
an
t
en
n
a i
s
h
av
i
n
g
a V
S
WR
r
a
ngi
ng
f
r
om
9.
66
G
H
z
t
o
10.
57
G
H
z.
A
t
al
l
t
h
e ab
o
v
e
f
r
eq
u
en
ci
es
t
h
e V
S
WR
v
al
u
e i
s
l
es
s
t
h
an
2
dB
w
hi
c
h i
s
t
he
i
m
pe
da
nc
e
ba
ndw
i
dt
h
of
t
he
a
nt
e
nna
.
T
h
e
ga
i
n of
t
he
pr
opos
e
d a
nt
e
nna
i
n t
e
r
m
s
of
t
he
e
l
e
va
t
i
on ga
i
n a
nd a
z
i
m
ut
ha
l
ga
i
n pa
t
t
e
r
ns
a
r
e
s
how
n i
n t
he
F
i
gur
e
4.
T
h
e
g
a
in
p
a
tte
r
n
in
b
o
th
th
e
p
la
n
e
s
is
s
imila
r
w
h
i
c
h
in
d
ic
a
te
d
th
a
t
th
e
a
n
te
n
n
a
is
r
a
d
ia
tin
g
u
n
if
o
r
m
ly
in
a
ll
t
he
di
r
e
c
t
i
ons
.
F
i
gur
e
s
4
(
a)
an
d
4
(
b)
s
ho
w
s
t
he
e
l
e
va
t
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F
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F
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gur
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a
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
1693
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6930
T
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b
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2020:
2328
-
2334
2332
F
ig
ur
e
5.
E
l
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va
t
i
on pl
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ne
pa
t
t
e
r
ns
F
ig
ur
e
6.
A
z
imu
th
a
l p
la
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p
a
tte
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T
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c
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r
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di
s
t
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s
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t
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s
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nt
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n t
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i
gur
e
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i
gur
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7
(a
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l
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F
ig
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h D
G
S
Evaluation Warning : The document was created with Spire.PDF for Python.
T
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m
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2333
(
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R
EF
ER
EN
C
ES
[1
]
Yi H
on
g Xie
,
C
he
ng Z
hu,
L
on
g L
i,
a
nd C
ha
n
g Ho
ng
L
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ng
,
“
A No
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l D
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l
-
B
a
nd M
e
ta
m
a
te
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l A
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nna
B
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se
d
on
C
om
ple
m
e
nta
r
y S
p
li
t R
in
g R
e
s
ona
tor
s
,
”
Mic
row
av
e
and
Op
tic
al T
e
c
hn
ol
ogy
L
e
t
te
r
s
,
v
ol
.
54,
no
.
4,
20
12
.
[2
]
M
o
h
a
m
m
a
d
S
a
e
e
d
M
a
j
e
d
i
,
A
m
i
r
R
e
z
a
A
t
t
a
r
i
,
“
D
ua
l
-
b
a
nd
r
e
so
na
nc
e
a
n
te
n
na
s us
in
g
e
ps
il
on ne
ga
ti
ve
tr
a
n
sm
i
s
sio
n
lin
e
,
”
I
EE
E An
te
n
na
s
a
nd
W
ire
le
s
s P
ro
pa
ga
ti
on L
e
t
te
r
s
,
vol
.
7
,
n
o.
4,
pp.
2
59
-
26
7,
20
13
[3
]
B
inf
e
ng Z
on
g,
G
ua
ngm
in
g W
a
n
g,
C
he
n
g Z
hou,
a
nd
Ya
we
i W
a
ng
,
“
C
om
pa
c
t L
ow
-
P
r
of
i
le
Dua
l
-
B
a
n
d
P
a
tc
h An
t
e
nna
Usi
ng No
ve
l TL
-
M
TM
S
tr
uc
tur
e
s
,
”
I
ET
m
ic
r
ow
av
e
s,
an
te
n
na
s &
pro
pa
ga
ti
on
,
v
o
l
.
14
,
pp.
5
67
-
57
0
,
20
14
.
[4
]
Hui Z
ha
ng,
Y
ou
-
Qua
n L
i,
Xi C
he
n,
Yu
n
-
Q
i F
u,
a
n
d
Na
i
-
C
ha
ng Y
ua
n
,
“
De
si
gn of
C
ir
c
u
la
r
/
Dua
l
-
F
r
e
que
nc
y L
i
ne
a
r
P
ola
r
iz
a
t
io
n An
te
n
na
s B
a
se
d o
n the
An
is
otr
op
ic
C
o
m
ple
m
e
nta
r
y S
pl
it R
i
ng R
e
so
na
t
or
,
”
I
EE
E T
ra
ns
ac
t
ion
s
on
A
nte
nn
as An
d
Pr
op
ag
at
io
n
,
vo
l.
57,
n
o.
10,
p
p.
33
52
-
55,
20
09
.
[5
]
J.
X.
Ni
u
,
“
Du
a
l
-
ba
n
d d
ua
l
-
m
ode
pa
tc
h a
n
te
n
na
b
a
se
d
on r
e
so
na
n
t
-
t
ype
m
e
ta
m
a
te
r
ia
l
tr
a
n
sm
i
ss
io
n L
i
ne
,
”
I
ET
Ele
c
tr
on
ic
L
e
t
te
r
s
,
vo
l.
46,
n
o.
4,
pp.
2
66,
20
10
.
[6
]
B
a
la
n
is C
.
A.
, “
Ad
va
nc
e
d e
ng
ine
e
r
in
g e
le
c
tr
om
a
gne
tic
s
,”
Wile
y
,
Ne
w
Y
or
k,
2
01
2
.
[7
]
S
e
k
h
a
r
M
.
,
S
idda
ia
h P
.,
“
Tr
iple
F
r
e
que
nc
y C
ir
c
ula
r
P
a
tc
h Ante
nna
,
”
20
14 I
E
EE I
n
te
r
na
ti
on
al C
on
fe
r
e
nc
e
on C
o
mp
ut
at
io
na
l I
nt
e
l
li
ge
nc
e
a
nd
C
om
pu
ti
ng
Re
se
a
rc
h
,
Park
C
o
lle
ge
of
En
gi
ne
e
r
in
g
a
nd
T
e
k
hn
ol
og
y
,
20
14
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
1693
-
6930
T
E
L
KOM
NI
KA
T
el
eco
m
m
u
n
C
om
put
E
l
C
ont
r
o
l
,
Vo
l
.
1
8
, N
o
.
5
,
O
ct
o
b
er
2020:
2328
-
2334
2334
[8
]
E.
Kus
um
a
Kum
a
r
i,
A.
N.
V.
R
a
vi
Kum
a
r
,
“
W
i
de
ba
nd Hig
h
-
G
a
i
n C
ir
c
u
la
r
l
y P
ola
r
iz
e
d P
la
na
r
An
te
n
na
Ar
r
a
y f
or
L
B
a
n
d
R
a
d
a
r
,
”
2
01
7 I
EE
E I
nte
rn
at
io
na
l C
o
nfe
re
nc
e
on C
o
mp
ut
at
io
na
l I
nte
ll
ige
nc
e
an
d
C
o
mp
ut
in
g Re
se
arc
h,
T
ami
ln
ad
u
C
o
lle
ge
o
f
En
gi
ne
e
r
in
g
,
20
17
.
[9
]
E.
Kus
um
a
K
um
a
r
i,
A.
N.
V.
R
a
v
i
Kum
a
r
,
“
De
ve
l
op
m
e
nt of
a
n L
B
a
nd
B
e
a
m
S
te
e
r
in
g C
u
bo
id A
nte
nna
A
r
r
a
y
,
”
201
7 I
E
EE I
nte
rn
at
io
na
l C
o
nfe
re
nc
e
o
n C
o
mp
ut
at
io
na
l
I
nte
l
li
ge
nc
e
an
d
C
o
mp
ut
in
g Re
se
ar
c
h,
T
a
mi
ln
ad
u C
ol
l
e
ge
of E
ng
ine
e
ri
ng
,
20
17
.
[
10]
S
u
n
k
a
r
a
b
o
i
n
a
S
r
e
e
n
u
,
V
a
d
d
e
S
e
e
t
h
a
r
a
m
a
R
a
o,
“
S
ta
c
ke
d M
ic
r
os
tr
ip A
nte
nn
a
fo
r
G
lo
ba
l P
os
it
io
ni
ng S
ys
t
e
m
,
”
201
7 I
E
EE I
nte
rn
at
io
na
l C
o
nfe
re
nc
e
o
n C
o
mp
ut
at
io
na
l
I
nte
l
li
ge
nc
e
an
d
C
o
mp
ut
in
g Re
se
ar
c
h,
T
a
mi
ln
ad
u C
ol
l
e
ge
of E
ng
ine
e
ri
ng
,
20
17
.
[
11]
R
a
o N.
A.
,
Ka
na
pa
la
S
.
,
“
W
ide
ba
n
d C
i
r
c
u
la
r
P
o
la
r
iz
e
d B
inom
i
a
l A
nte
nna
Ar
r
a
y f
or
L
-
B
a
n
d
R
a
d
a
r
,
”
Mic
roe
le
c
t
ro
nic
s,
Ele
c
tr
om
ag
ne
t
ic
s a
nd T
e
le
c
o
mm
un
ic
a
ti
on
s
,
vo
l.
52
1,
pp
.
279
-
28
7,
20
18.
[
12]
Ka
na
pa
la
S
.
,
R
a
o
N.
A.
,
“
B
e
a
m
S
te
e
r
i
ng C
ub
oi
d A
nte
n
na
Ar
r
a
y f
or
L
B
a
nd R
AD
AR
,
”
L
e
c
t
ure
N
ote
s i
n E
le
c
t
ric
al
En
gi
ne
e
r
in
g,
v
ol
.
5
21
,
pp.
4
85
-
49
3,
20
19
.
[
13]
C
ha
n
dr
a
se
ka
r
a
n,
Ka
r
th
ik
T.
,
M
uha
m
m
a
d F
a
e
yz
Ka
r
im
,
a
nd Ar
ok
ia
s
wa
m
i
Al
ph
one
s
,
“
C
R
L
H str
uc
t
ur
e
-
ba
s
e
d
hig
h
-
i
m
p
e
d
a
n
c
e
s
u
r
f
a
c
e
f
o
r
p
e
r
f
o
r
m
a
n
c
e
e
n
h
a
n
c
e
m
e
n
t
o
f
p
l
a
n
a
r
a
nte
nna
s
,
”
I
ET
M
ic
r
ow
av
e
s,
A
nte
nn
a
s &
Pro
pa
ga
ti
on
,
v
ol.
11
, n
o
.
6
,
pp
.
8
18
-
8
26
,
20
16
.
[
14]
Tom
a
s M
ik
ul
a
se
k,
Ap
os
to
lo
s G
e
or
g
ia
d
is,
A
na
C
o
lla
do,
a
nd Ja
r
os
la
v L
a
c
ik,
“
2×
2 M
ic
r
o
str
ip P
a
tc
h
An
te
n
na
A
r
r
a
y
F
e
d b
y S
u
bs
tr
a
te
I
nte
gr
a
te
d W
a
ve
g
ui
de
f
or
R
a
da
r
Ap
pl
i
c
a
ti
on
s
,
”
I
EE
E A
nt
e
n
na
s a
nd
Wi
re
le
ss
Pr
op
ag
at
io
n L
e
t
t
e
rs,
vol.
1
1,
pp.
1
28
7
-
90,
20
13
[
15]
Ri
c
k
W.
Ki
nd
t a
n
d W
il
lia
m
R
.
P
ic
kle
s
,
“
U
ltr
a
wi
de
ba
nd All
-
M
e
ta
l
F
la
r
e
d
-
N
otc
h Ar
r
a
y R
a
d
ia
t
or
,
”
I
EE
E T
r
an
sac
t
ion
s
on A
nte
nn
as
an
d Pr
op
ag
at
io
n
,
vo
l.
58,
n
o.
11,
p
p.
33
58
-
75,
20
10.
[
16]
M
.
Akba
r
i,
M
.
M
.
Ali,
M
.
F
a
r
a
ha
n
i,
A.
R
.
S
e
ba
k a
n
d
T.
De
ni
dn
i
,
“
S
pa
tia
ll
y m
ut
ua
l c
ou
pl
in
g r
e
d
uc
t
io
n be
t
we
e
n
CP
-
M
I
M
O a
nte
nna
s u
si
ng F
S
S
su
pe
r
s
tr
a
t
e
,
”
Ele
c
tr
on
ic
s
L
e
tte
r
s
,
v
ol
.
5
3
,
no
.
8
,
pp.
5
16
-
5
18
,
20
17
.
[
17]
Ab
dolm
e
h
di Da
d
ga
r
p
our
,
B
e
hna
m
Z
a
r
gh
oo
ni,
B
a
l
S
.
Vir
de
e
,
Ta
ye
b A.
De
n
id
ni
,
“
M
ut
ua
l C
o
up
li
ng R
e
du
c
ti
on
in Die
le
c
t
r
ic
R
e
so
na
t
or
An
te
n
na
s U
si
ng M
e
ta
sur
f
a
c
e
S
hie
l
d f
or
60 G
Hz
MIMO
S
y
s
t
ems
,
”
I
E
EE
An
te
n
na
s
and
Wir
e
le
ss P
ro
pa
ga
ti
on L
e
tte
rs
,
v
ol.
1
6,
pp.
4
47
-
80,
2
01
6.
[
18]
R
.
H
a
f
e
z
i
f
a
r
d
,
M
.
N
a
s
e
r
-
M
og
ha
da
si,
J.
R
a
s
he
d M
oha
sse
l,
“
M
ut
ua
l C
o
up
li
ng R
e
duc
ti
on f
or
Tw
o C
l
ose
lyS
p
a
c
e
d
M
e
a
nde
r
L
ine
A
nte
nna
s Us
in
g M
e
ta
m
a
t
e
r
ia
l S
ub
str
a
te
,
”
I
EEE
An
te
n
na
s an
d Wi
re
le
ss P
ro
pa
ga
ti
on L
e
t
te
r
s
,
vo
l
.
15,
pp.
40
-
3
,
20
15
.
[
19]
M
oha
m
e
d
M
.
Else
we
a
nd De
b
C
ha
t
te
r
je
e
,
“
Ana
ly
si
s
o
f
Nonu
nif
or
m
Exc
ita
ti
on
a
n
d
Ele
m
e
n
t
S
pa
c
i
ng
i
n
S
ide
lob
e
R
e
duc
ti
on
of
W
i
de
ba
nd
U
-
S
lo
t M
ic
r
os
tr
i
p P
a
tc
h P
ha
se
d
Ar
r
a
y A
nte
nna
s”
201
5 I
E
EE I
n
te
r
na
ti
on
al S
y
m
po
siu
m
on
A
nte
nn
as
an
d
Pr
op
ag
at
io
n
&
USN
C
/U
RSI
N
ati
on
al
Ra
di
o
Sc
ie
nc
e
Me
e
ti
ng,
A
t
Va
nc
o
uv
e
r,
BC
,
20
15.
[
20]
I
z
a
be
la
S
lom
ia
n,
Kr
z
y
sz
t
of
W
i
nc
z
a
,
a
nd S
la
w
om
ir
G
r
usz
c
z
yn
sk
i
,
“
Expe
r
im
e
n
ta
l Ve
r
if
ic
a
ti
on of
S
ide
lo
be
Le
ve
l
R
e
duc
ti
on Te
c
hn
iq
ue
f
or
C
ir
c
u
la
r
l
y P
ola
r
iz
e
d
An
te
n
na
Ar
r
a
y F
e
d B
y 8 ×
8 B
ut
le
r
M
a
tr
ix
,
”
2
01
6 21
st I
nte
rn
at
i
ona
l
C
onf
e
re
nc
e
on
Mic
row
av
e
,
Ra
da
r an
d W
ire
le
s
s C
om
mu
nic
at
io
ns (
MI
K
ON
)
,
2
0
16.
[
21]
M
oha
m
m
a
dm
a
h
di F
a
r
a
ha
n
i,
M
.
A
kba
r
i,
M
o
ur
a
d
Ne
d
il,
Ta
ye
b A.
De
n
id
ni
,
“
M
ut
ua
l
C
ou
pl
in
g
R
e
duc
ti
on in Die
le
c
tr
ic
R
e
son
a
t
or
M
I
M
O
An
te
n
na
Ar
r
a
y
s U
si
ng
M
e
ta
sur
f
a
c
e
Or
t
ho
go
na
l
iz
e
W
a
l
l
,
”
20
17
1
1t
h E
ur
ope
an
C
o
nfe
r
e
nc
e
on A
nte
nn
as
an
d Pr
op
ag
at
io
n (
E
UC
A
P)
,
20
17
.
[
22]
M
oha
m
m
a
dm
a
h
di F
a
r
a
ha
ni,
Ja
va
d P
our
a
hm
a
da
z
a
r
,
“
M
ut
ua
l C
ou
pl
in
g R
e
duc
ti
on i
n M
il
lim
e
te
r
-
W
a
ve
M
I
M
O An
te
nna
Ar
r
a
y U
si
ng a
M
e
ta
m
a
te
r
ia
l P
o
la
r
iz
a
t
io
n
-
R
ot
a
to
r
W
a
ll
,
”
I
EEE
An
te
n
na
s an
d Wi
re
le
ss P
ro
pa
ga
ti
on L
e
t
te
r
s
,
vo
l
.
16,
pp.
13
24
-
23
27
,
20
16.
[
23]
Ana
nda
R
a
o
,
Ne
la
pa
ti
,
“
W
i
de
ba
nd H
ig
h G
a
in
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