Indonesian Journal of
Electrical
Engineer
ing and
Computer Science
V
o
l. 10
, No
. 3, Jun
e
20
18
, pp
. 98
0
~
98
8
ISSN: 2502-4752,
DOI: 10.
11591/ij
eecs.v10
.i3.pp980-988
9
80
Jo
urn
a
l
h
o
me
pa
ge
: http://iaescore.c
om/jo
urnals/index.php/ijeecs
Multilayer End Coupled
Band Pass Filter using
Low-temperature Co-fired Ceramic Technology for Broadband
Fixed W
i
rel
ess
Z
u
lkifli Ambak
1
, Hiz
a
mel
M.Hiz
a
n
2
, Ahm
a
d
I
s
ma
t Ab
d
u
l
R
a
him
3
, Az
mi
Ibrahim
4
,
Mo
hd Z
u
lfa
d
li M.
Yus
o
ff
5
, Ra
za
li
Nga
h
6
1,2,3,4,5
Communic
a
tion
Technolog
y
,
TM
Resear
ch
&
Development Sdn
Bhd,
Lingkaran Teknokrat,
63000, C
y
ber
j
aya, Selangor
, Malay
s
ia
6
Wireless Communication C
e
nter
, Facu
lt
y of Ele
c
t
ric
a
l Engin
eerin
g,
Universi
ti
Tek
nologi
Ma
la
ysia
,
81310, Johor,
Malay
s
ia
Article Info
A
B
STRAC
T
Article histo
r
y:
Received Ja
n
5, 2018
R
e
vi
sed M
a
r
2,
2
0
1
8
Accepted
Mar 18, 2018
This paper
pres
ents design
app
r
oach for
reali
z
i
ng m
u
ltilay
e
r E
nd Coupled
Bandpass Filter
(ECBPF) using
low tem
p
eratur
e co-fir
e
d cer
am
ic (LTCC)
techno
log
y
at TMRND'
s LTCC Lab. De
sign method for the ECB
PF is based
on the coup
led
-resonator fi
lte
r
which was re
ali
zed in
LTC
C m
u
ltila
ye
r
substrate
and op
erating at th
e center
fr
equency
o
f
42GHz. Thr
ee
samples of
EC BPF have b
e
en design
ed
, si
mul
a
te
d,
fa
bric
a
t
ed a
nd
investig
at
ed in
term
s
of perform
anc
e
and struc
t
ure
si
ze.
Th
is m
u
ltil
a
y
er
ECBPF wer
e
fabr
ic
ated
in the 8
la
ye
rs LTCC Ferro A6
S m
a
terial
s with
dielectr
i
c
constant of 5.8
,
loss tangent of 0.002 and me
tallization of gold.
The
measured in
sertion loss
for ECBPF was 2.43dB and
retu
rn loss
was 22.8
1dB at
the cen
ter frequ
en
cy
at 42GHz.
The
overall size of the fa
bri
c
a
t
ed f
ilt
er wa
s 6.0 mm x 2.5 mm x
0.77 mm.
K
eyw
ords
:
B
r
oa
dba
n
d
fi
x
e
d wi
rel
e
ss
End
co
up
led BPF
LTCC
Copyright ©
201
8 Institut
e
o
f
Ad
vanced
Engin
eer
ing and S
c
i
e
nce.
All rights re
se
rve
d
.
Co
rresp
ond
i
ng
Autho
r
:
Zu
lk
ifli Am
b
a
k
,
C
o
m
m
uni
cat
i
o
n Tec
h
nol
ogi
es
,
TM
R
e
searc
h
a
n
d
De
vel
o
pm
ent
S
d
n
B
h
d,
Lin
g
k
a
r
a
n
Tekn
okr
at Tim
u
r
,
6
300
0, Cyb
e
r
j
aya, Selang
or
,
Malaysia.
Em
a
il: zu
lk
iflia
m
b
ak
@tm
r
n
d
.co
m
.
m
y
1.
INTRODUCTION
Th
e
r
a
p
i
d
d
e
velo
p
m
en
t in
micr
ow
av
e and
mil
l
i
m
e
t
er
w
a
v
e
co
mm
u
n
i
catio
n
tech
no
logy is d
e
m
a
n
d
fo
r hi
gh
qual
i
t
y
,
m
i
ni
at
uri
zat
i
on, a
n
d l
o
w
-
c
o
st
fa
bri
cat
i
o
n
of
passi
ve c
o
m
ponent
s s
u
c
h
as t
h
e m
i
cr
ost
r
i
p
b
a
ndp
ass filters (BPF) an
d
an
tenn
as. Th
e n
e
x
t
g
e
n
e
ration
o
f
wireless
co
mm
u
n
i
catio
n
n
e
twork
s
env
i
sag
e
s
o
p
e
ration
at
milli
meter-wav
e frequ
en
cies
(>3
0
GHz) to
ach
i
ev
e th
e h
i
gh
d
a
ta sp
eed
wh
ere larg
er allo
cab
le
b
a
ndwid
th is
av
ailab
l
e for
gig
a
b
it/s tran
smissio
n
s
.Sev
eral
app
licatio
n
s
were d
e
v
e
lop
e
d
in m
i
cro
w
ave and
m
i
ll
im
et
er wav
e
(m
m
-
wave)
ban
d
t
o
ac
hi
ev
e t
h
e
hi
g
h
-s
pee
d
dat
a
t
r
a
n
sm
i
s
si
on i
n
cl
u
d
i
n
g
fo
r m
m
-wave
R
a
di
o
o
v
e
r Fib
e
r (Ro
F
)
ap
p
lication
as repo
rted
in
[1-3
]. In
g
e
n
e
ral, th
e b
a
nd
p
a
ss
filter is
o
n
e
o
f
an im
p
o
rtan
t
passive c
o
m
ponent in m
i
crowave a
nd m
illim
eter wave com
m
unication sy
stem
because of its function
for
p
e
rm
itt
in
g
signal in
th
e d
e
sired
rang
e of frequ
e
n
c
ies and
rejectin
g
all o
t
h
e
r. Th
ere are m
a
n
y
filter to
po
log
i
es
at
m
i
cro
w
av
e an
d
mm
-wav
e freq
u
e
n
c
ies
as repo
rted
su
ch
as th
e p
a
rallel-co
up
led-reson
a
to
r filters [4
] an
d
t
h
e
h
a
irp
i
n
reson
a
to
r filters
[5
] wh
ich
hav
e
a
p
r
ob
lem
with
a larg
e size, t
h
e h
i
gh
lo
ss
du
e to
t
h
e in
creased
reson
a
tor cap
a
citan
ce, low st
o
p
b
a
n
d
rej
ectio
n, and
spu
r
i
o
u
s
respon
se at
th
e filter's h
a
rm
o
n
i
cs.W
e n
e
ed
to
u
s
e
d
i
fferen
t
feed
to
po
log
i
es and
m
u
ltilayer str
u
cture to
reduce th
e size and
im
p
r
o
v
e
i
n
sertio
n
l
o
ss su
ch
as
p
a
rallel-co
up
led
-
feed stru
cture [6
], tapp
ed-lin
e
[
7
],
and
th
e
e
n
d-
co
up
led struct
ures
[8].
Evaluation Warning : The document was created with Spire.PDF for Python.
In
d
onesi
a
n
J
E
l
ec En
g &
C
o
m
p
Sci
ISS
N
:
2
5
0
2
-
47
52
Mu
ltila
yer En
d Cou
p
l
ed
Ba
nd Pa
ss Filter u
s
i
n
g Lo
w-temp
era
t
u
r
e… (Zu
l
kifli Amba
k)
98
1
On
e
o
f
th
e im
p
o
r
tan
t
p
ackag
ing
tech
no
log
i
es to
in
teg
r
ate p
a
ssiv
e
s elemen
ts su
ch
as filters and
antenna is the Low-Tem
p
erat
ure Co-fire
d C
e
ram
i
c
(LT
CC) tech
no
log
y
. Th
is LTCC tech
no
log
y
allo
ws fo
r
the realization
of com
p
act de
vices
whic
h m
a
kes
use
of ce
ra
m
i
c tapes wit
h
low loss
m
a
terial syste
m
s such as
Ferr
o
A6S m
a
teri
al
whi
c
h has
a di
el
ect
ri
c const
a
nt
o
f
5
.
8 a
nd l
o
ss t
a
n
g
ent
s
of
0.
00
2 [
9
]
.
The m
a
i
n
draw
ba
c
k
i
m
p
l
e
m
en
tatio
n
o
f
th
e
p
l
an
ar b
a
n
d
p
a
ss filter at
h
i
gh
er m
i
crowav
e an
d
mil
l
i
m
e
t
er
wav
e
freq
u
e
n
c
ies are t
h
e
di
m
e
nsi
onal
l
i
m
i
t
a
t
i
ons i
n
fa
bri
cat
i
o
n t
ech
n
o
l
o
gi
es s
u
ch
as
pri
n
t
e
d ci
rcui
t
boa
r
d
(
P
C
B
)
a
n
d
Lo
w
-
Tem
p
erat
ure
Co
-Fi
r
ed
Ceramic (LTCC) te
ch
no
log
y
. For
exam
ple, conventional
planar
end
-
co
u
p
l
e
d
B
PF i
s
im
possi
bl
e t
o
be im
ple
m
ente
d
because
of the tight c
o
upling bet
w
een
the res
onat
o
r, the ba
nd ga
p is
narrow a
n
d the
LTC
C
pri
n
t
screen p
r
ocess wi
t
h
t
h
e
m
i
nim
u
m
gap bet
w
ee
n l
i
n
e
reso
lu
tion
is less th
an
10
0u
m
[
1
0
]
. In
th
is p
a
p
e
r, we
p
r
op
o
s
ed
d
e
si
gn
fro
m
p
l
an
ar to
m
u
ltilayer en
d
co
up
led
b
a
nd
p
a
ss
filter (ECBPF) t
o
o
v
e
rco
m
e th
e p
r
ob
l
e
m
o
f
t
h
e di
m
e
nsi
o
n
a
l
l
i
m
i
t
a
t
i
on of fa
b
r
i
cat
i
o
n
t
echnol
ogi
es
.
The m
u
l
t
i
l
a
yer EC
B
PF st
r
u
ct
u
r
e wi
t
h
v
e
rt
i
cal
ly
st
acked
2 st
ag
e reso
nat
o
rs,
6
gr
o
u
n
d
e
d
l
a
y
e
rs, a
fract
i
o
na
l
ban
d
wi
dt
h
of
7.
14
% an
d si
ze red
u
ct
i
o
n o
f
3
0
%
co
m
p
ared
with
an
equ
i
v
a
len
t
LTCC end
co
up
led
m
i
cros
trip
filter [10] was d
e
sign
ed
and
d
e
v
e
l
o
ped
at a
cen
ter freq
u
e
ncy o
f
42GHz
u
s
ing
LTCC tech
no
log
y
. The fabricated
mu
ltilayer ECB
PF size was
6
.
0
mm x
2.
5 m
m
x 0.
77
m
m
.
2.
DESIGN OF THE
MULTILAYE
R
EN
D
COUPLED BANDPASS FILTER
In
th
is pap
e
r, th
e b
a
sic stru
ctu
r
e
o
f
th
e Mu
l
tilayer ECBPF is b
a
sed
on
the co
up
led-reson
a
tor filter
wh
ich
was realized
in
LTCC
m
u
lti
layer su
b
s
trate and
operating at the center freque
ncy of 42GHz. This
m
u
l
tilayer EC
BPF is im
p
o
r
tan
t
p
a
rts of t
h
e Re
m
o
te An
t
e
n
n
a
Un
it (R
AU) Transm
i
t
t
e
r fo
r mm
-wa
v
e RoF
appl
i
cat
i
o
ns. F
i
gu
re 1
sh
o
w
s
t
h
e p
r
o
p
o
se
d b
l
ock
di
ag
ram
of R
AU
Tra
n
s
m
i
t
t
e
r fo
r R
a
di
o o
v
e
r
Fi
be
r s
y
st
em
whe
r
e
ope
rating at Broa
dba
nd Fi
xed
Wirele
ss Acces
s freq
uency
of 40GHz. T
h
e
phot
od
etector (PD)
conve
r
ts
opt
i
cal
i
n
put
s
i
gnal
wi
t
h
i
n
1
1
0
0
-
1
6
5
0
n
m
wavel
e
ngt
h t
o
t
h
e ra
di
o
fre
qu
ency
si
g
n
al
wi
t
h
i
n
t
h
e
ran
g
e
of
3
7
-
43
.5
G
H
z. The
radi
o f
r
eq
ue
n
c
y
si
gnal
i
s
am
pli
f
i
e
d by
t
h
e Low N
o
i
s
e Am
pl
i
f
i
e
r (LN
A
) m
odul
e an
d t
h
e
n
p
a
ssed
th
rou
gh th
e b
a
nd
p
a
ss filter. Th
e filtered
sign
al is
then
am
p
lified
ag
ain
to
th
e
d
e
sired
power level b
y
th
e Power Am
p
lifier (PA) mo
du
le b
e
fore bein
g
tran
sm
it
te
d
to
th
e an
tenn
a. In
th
is wo
rk
, m
u
lti
layer ECBPF
was designe
d
fabricated
a
nd
m
easured. T
h
e design
m
e
t
h
odo
log
y
fo
r
i
m
p
l
e
m
en
ti
ng the
structure of
the
m
u
l
tilayer ECBPF
b
e
g
i
n
s
fro
m
fin
a
lizin
g
t
h
e sp
ecification
,
d
e
si
g
n
th
e sch
e
m
a
tic circu
it b
y
co
m
p
u
t
er-aid
ed
tech
n
i
qu
es an
d th
en
g
e
n
e
rate th
e ph
ysical la
yo
u
t
realization
th
rou
g
h
electro
m
a
g
n
e
tic (EM) si
m
u
latio
n
to
o
l
s.
Th
e
g
e
n
e
ral
d
e
sig
n
pro
c
edu
r
e to
d
e
sign
and
d
e
v
e
l
o
p th
e m
u
ltilayer ECBPF can b
e
su
mmarized
as:
a.
defi
ne a
n
d fina
lize the speci
fication
b.
deri
ve a sc
hem
a
t
i
c
ci
rcui
t
c.
circu
it op
timiz
atio
n
d.
gene
rat
e
a
p
h
y
s
i
cal
l
a
y
out
ba
sed
o
n
t
h
e
ci
rc
ui
t
e.
tune t
h
e layout
to m
eet requi
red s
p
ecifications
f.
fab
r
i
cat
e LTC
C
pr
ot
ot
y
p
e
s
g.
t
e
st
i
ng t
o
ve
ri
f
y
t
h
e pe
rf
o
r
m
a
nce
Fig
u
re
1
.
Blo
c
k
d
i
agram
o
f
the 40
GHz R
A
U tran
sm
itter fo
r Ro
F
system
The
design s
p
e
c
ification for
m
u
ltilayer ECBPF usi
ng
LT
CC technol
ogy is shown in T
a
ble 1.
It wa
s
desi
g
n
e
d
usi
n
g
8 l
a
y
e
rs LTC
C
Ferr
o A
6
S t
a
pes sy
st
em
s
wi
t
h
rel
a
t
i
v
e d
i
el
ect
ri
c const
a
nt
an
d a l
o
ss t
a
nge
n
t
of
5.
8 a
nd
0.
0
02
res
p
ect
i
v
el
y
.
The t
h
i
c
kne
ss of
si
n
g
l
e
l
a
y
e
rs was
96
m
.
It co
n
s
ists o
f
t
h
e two
layers were
R
F
IN
P
U
T
LN
A
LN
A
LN
A
PA
V
-
SU
PPL
Y
PH
O
T
O
D
I
O
D
E
V
-
CO
NN
E
C
T
O
R
OP
T
I
C
A
L
F
I
B
E
R
H
I
GH
GA
I
N
B
L
O
C
K
POW
E
R
A
M
PL
I
F
I
E
R
M
O
D
U
L
E
L
T
C
C
BA
N
D
P
A
SS
F
I
LT
E
R
L
T
CC B
A
ND
P
A
S
S
F
I
L
T
E
R
A
N
T
E
NNA
4
0
G
H
z
L
T
CC
RA
U T
R
A
N
S
M
I
T
T
E
R
C
E
NT
RA
L
ST
AT
I
O
N
(C
S
)
PH
O
T
O
D
I
O
D
E
LT
C
C
R
A
U
TR
A
N
S
M
I
T
T
E
R
RF
O
U
T
P
UT
O
P
T
I
C
A
L
F
I
BER
A
N
T
E
N
N
A
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
502
-47
52
I
ndo
n
e
sian
J Elec Eng
& Com
p
Sci, V
o
l. 10
,
No
.
3
,
Jun
e
2
018
:
98
0 – 98
8
98
2
requ
ired
for end
coup
led
reson
a
tor BPF and 6
layers
u
s
ed
as Grou
nd
ed
plan
es as illu
strated
in
Fi
g
u
re
2
(
a).
Fig
u
r
e
2(b
)
sho
w
s t
h
e 3D
v
i
ew
d
e
si
g
n
layout w
h
ich
g
e
n
e
r
a
ted
th
rou
g
h
CST electr
o
m
a
g
n
etic (
E
M)
sim
u
latio
n
to
o
l
s. Th
e to
tal
d
i
m
e
n
s
io
n
o
f
p
r
op
o
s
ed
b
a
n
d
p
a
ss
filter was
6
.
0
m
m
x
2
.
5
m
m
x
0
.
77
mm
.
Table 1. Design
s
p
ecification
No
LTCC MUL
T
I
L
A
Y
ER
ECBPF
Ite
m
s
Targeted
Unit
1
Fr
equency
range
40.
5-
43.
5
GHz
2 Center
Fr
equency
42
GHz
3 Passband
width
3
GHz
4
I
n
ser
tion L
o
ss (
S
2
1
)
< 3
dB
5
Retur
n
L
o
ss (
S
11)
>10
dB
6 Im
pedance
50
(a)
(b
)
Fig
u
re
2
.
Th
e co
nfigu
r
ation
of th
e LTCC M
u
ltila
yer ECBP
F a) Cro
ss secti
o
n, an
d b)
3D
v
i
ew
u
s
i
n
g CST
EM
So
ftwa
re
Th
ree sam
p
les o
f
m
u
ltilayer E
CBPF as
m
a
rk
in
g
as sam
p
le A, B and
C (see Fig
u
re 7) were d
e
si
g
n
e
d,
fabricated
, m
easu
r
ed
and
analyzed
in
o
r
d
e
r to
ch
eck
th
e filter p
e
rfo
r
m
a
n
ces in term
o
f
i
n
sertion
l
o
ss and
str
u
ctur
e size.
Th
e
p
e
rf
or
m
a
n
ces o
f
th
e
3
sa
m
p
les o
f
t
h
e
m
u
l
tilayer
EC
BPF w
ith
Gr
ou
nd
Si
g
n
al G
r
ound
(GS
G
) po
rts w
e
re
in
vestigate
d
. Ex
pected
re
sult
f
o
r
th
e e
n
d
cou
p
l
ed
BPF a
t
th
e c
e
n
ter
fr
e
q
u
e
n
c
y of
42
GH
z
with
insertion
l
o
ss, S2
1 less than
3
d
B
and
retu
rn
l
o
ss m
o
re t
h
an 10d
B.
In the
o
ry
,
accordi
ng to J.Hong and M.J La
ncaster [11], the
general conf
iguration of an e
nd c
o
upled
microstrip ba
ndpass
filter is illust
rated in Figure
3 whe
r
e each
open
e
n
d microstrip
resonat
o
r is
app
r
oxi
m
a
t
e
ly
a hal
f
gui
ded
wavel
e
ngt
h l
o
ng at
t
h
e cent
e
r fre
que
ncy
f
o
o
f
th
e b
a
nd
p
a
ss filter. Th
e cou
p
ling
from
one res
o
nator to t
h
e other is through the
ga
p
between the two adjacent
ope
n
e
nds
and
hence is
cap
acitiv
e. The g
a
p
can
b
e
rep
r
esen
ted
b
y
th
e in
v
e
rters,
wh
ich
are of th
e fo
rm
in
Fig
u
r
e
4
.
Th
ese J-in
v
e
rters
t
e
nd t
o
re
fl
ect
hi
g
h
i
m
pedan
ce l
e
vel
s
t
o
t
h
e end
s
o
f
eac
h
of t
h
e hal
f
w
a
vel
e
n
g
t
h
res
o
nat
o
rs an
d i
t
c
a
n be
sh
own
that th
is cau
ses th
e
reso
n
a
t
o
rs
to
exh
i
b
it a sh
un
t typ
e
reso
n
a
n
ce.
Fig
u
re
3
.
Gen
e
ral con
f
i
g
uratio
n of
end
co
upled
m
i
cro
s
trip
b
a
ndp
ass
filter
U
N
D
E
R
8
L
AYER
S
L
T
CC
F
E
RR
O
A
6
S
G
R
O
U
N
D
ED
L
AYE
R
ST
AG
G
E
R
G
R
O
U
N
D
ED
V
I
A
E
N
D CO
U
P
L
E
D B
P
F
R
E
S
O
NA
T
O
RS
Y
0
S
0,1
S
1,2
S
n
-
1,n
S
n
,
n
+
1
IN
PU
T
O
U
T
P
U
T
Y
0
,
1
Y
0
,
Y
0
,
n
Y
0
B
0,1
B
n,n+1
B
n
-
1
,n
B
1,
2
L
1
L
2
Ln
Evaluation Warning : The document was created with Spire.PDF for Python.
In
d
onesi
a
n
J
E
l
ec En
g &
C
o
m
p
Sci
ISS
N
:
2
5
0
2
-
47
52
Mu
ltila
yer En
d Cou
p
l
ed
Ba
nd Pa
ss Filter u
s
i
n
g Lo
w-temp
era
t
u
r
e… (Zu
l
kifli Amba
k)
98
3
Fig
u
re
4
.
Lo
wp
ass
p
r
o
t
o
t
yp
e
filters equ
i
v
a
len
t
m
o
d
e
l with
J-inv
e
rter
The
ge
neral
E
q
uat
i
o
n
s
f
o
r e
n
d
co
upl
e
d
B
P
F
desi
g
n
param
e
t
e
rs a
r
e
gi
ve
n a
s
f
o
l
l
o
ws:
,
(1)
,
; J=
1 to n-1
(2)
,
(
3
)
Whe
r
e by
Jj
,j
+1
: Ch
aracteristic ad
m
i
tt
ances of
J-i
nve
r
t
ers
Yo
: C
h
aracteristic ad
m
i
ttan
ces of th
e MSL
g
0,
g
1….
,
g
n:
El
em
ent
of
a l
a
dde
r t
y
pe
l
o
w
pass
pr
ot
ot
y
p
e
wi
t
h
a
n
o
rm
al
ized c
u
t
o
ff
fre
q
u
ency
FB
W
:
a fractio
n
a
l
b
a
n
d
wid
t
h
o
f
th
e
b
a
n
d
pass filter =
(f hig
h
–f low /f cen
t
er)
The
value
of c
h
aracteristic i
m
pedance, J
-
inverter can
be ob
tain
ed
with
eq
u
a
tion
(1
)
t
o
(3
)
if
th
e
typ
e
o
r
d
e
r an
d
ri
pple (in
Ch
eb
ysch
eff typ
e
) of th
e mm
-wav
e b
a
ndp
ass filter are d
e
term
in
e
d
. Fo
r th
e wi
deb
a
nd
filter, we n
e
ed
tig
h
t
cou
p
l
i
n
g
b
e
tween
the reson
a
to
r and
th
e b
a
n
d
g
a
p
m
u
st b
e
v
e
ry n
a
rro
w
. From th
e
calculation, the filter
has
FB
W of 7.14%
, hence
t
h
is
filter can be
cate
g
orized as a
narrowba
nd
filter because
o
f
fraction
a
l ban
d
wid
t
h
(FB
W) less th
an
20
%. BPFs can
b
e
classified
as a n
a
rrow b
a
nd
p
a
ss filter and
wid
e
b
a
ndp
ass filter o
n
th
e
b
a
sis
o
f
th
ei
r FB
W. W
i
t
h
th
e FB
W
of 20
% or
less is classifi
ed
as n
a
rro
w
b
a
ndp
ass
filter wh
ereas t
h
e
wid
e
b
a
n
d
pass filters are t
h
o
s
e
wh
o
are
FB
W
m
u
ch
h
i
g
h
e
r t
h
an th
e 20
%. A goo
d b
a
n
d
p
a
ss
filter requ
ires
lo
w p
a
ssb
and
in
sertion
lo
ss
an
d
larg
e
su
ppression
in
th
e
rej
ection
area
in
clu
d
i
n
g
t
h
e imag
e
si
gnal
a
n
d i
n
-
b
an
d
si
g
n
al
ha
rm
oni
cs.
Whe
n
t
h
e
fre
que
nc
y
i
s
l
o
w, e
.
g
.
,
f
o
r
m
o
st
wi
r
e
l
e
ss com
m
uni
cat
i
o
n
ap
p
lication
s
,
filters are
u
s
u
a
lly i
m
p
l
e
m
en
ted
b
y
LC elem
en
t typ
e
. In
o
u
r LTCC d
e
sign
rules, th
e
reso
l
u
tio
n
of
p
r
i
n
t screen
p
r
o
cess, th
e m
i
n
i
m
u
m
g
a
p
b
e
tween
lin
es is
100
u
m
. Assu
m
i
n
g
th
e cap
acitive g
a
p
s
act as
perfect,
series cap
acitan
ce
d
i
scon
tinu
ities o
f
su
scep
tan
ce B
j
,
j
+
1
as
sh
own
in Fi
g
u
re 5
.
Fi
gu
re
5.
Im
m
i
t
t
a
nce i
n
vert
ers
com
p
ri
sed
of l
u
m
p
ed and t
r
a
n
sm
ission line
ele
m
ents
Design
p
a
ram
e
ters Eq
u
a
tion
as fo
llo
ws:
S
u
s
c
ep
ta
n
c
e
,
,
,
(
4
)
El
ect
ri
cal
l
e
ngt
h
of
t
h
e J
-
i
n
ve
rters
asso
ciates with
j
t
h
h
a
lf
wav
e
leng
th
Reson
a
tor
tan
,
t
a
n
,
r
a
d
i
a
n
s
(
5
)
J
0,1
J
1,2
J
2,
3
J
n,
n+1
C
a1
C
a2
C
an
Φ
/2
Φ
/2
Φ
<0
fo
r
B
>0
B=
C
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
502
-47
52
I
ndo
n
e
sian
J Elec Eng
& Com
p
Sci, V
o
l. 10
,
No
.
3
,
Jun
e
2
018
:
98
0 – 98
8
98
4
Whe
r
e t
h
e B
j
,j+1, a
n
d
are e
v
aluated at
fo
Co
up
ling
g
a
p
s
, Sj,j
+1
of th
e
micro
s
trip
end
co
up
led reson
a
to
r
filter can b
e
d
e
term
in
ed
as obtaine
d
the
series ca
pacitances t
h
at satisfy:
Cg
,
,
ω
(6
)
W
h
er
eb
y
ω
2
π
f
i
s
t
h
e an
gul
a
r
f
r
e
q
u
e
ncy
o
f
t
h
e m
i
d-
ba
nd
.
The p
h
y
s
i
cal
l
e
ngt
hs of
res
o
na
t
o
rs
a
r
e gi
ve
n by
l
λ
π
θ
l
j
l
j
(
7
)
Effectiv
e leng
th
l
j
ω
,
λ
π
(
8
)
l
j
ω
,
λ
π
(
9
)
From
t
h
e a
b
o
v
e
m
a
t
h
em
at
i
cal eq
uat
i
o
n
s
,
des
i
gn
pa
ram
e
t
e
r of
t
h
e
ba
nd
ga
p a
n
d
p
h
y
s
i
cal
l
e
ngt
h
f
o
r
m
u
l
t
i
l
a
y
e
r
EC
B
PF can
be
obt
ai
n
e
d as
sh
ow
n i
n
Tabl
e
2
.
Fi
g
u
re
6(
a) a
nd
(
b
) s
h
ow t
h
e t
op
vi
ew a
n
d
cros
s-sect
i
o
n
of t
h
e
b
a
nd
g
a
p
,
ph
ysical len
g
t
h and
v
e
rtical coup
lin
g of t
h
e
p
r
o
posed
filter.
Tab
l
e 2.
Design
param
e
ters fo
r
LTCC Mu
ltilayer ECBPF
No Ite
m
s
Design
Re
m
a
rks
1 S0,
1
210um
Over
lap
2 S1,
2
30u
m
Spacing
3 S2,
3
30u
m
Spacing
4 S3,
4
210um
Over
lap
5 L
0
1000
u
m
6 L
1
1410
u
m
7 L
2
1343
u
m
Fi
gu
re
6.
Desi
gn
o
f
t
h
e m
u
l
t
i
l
a
y
e
r EC
B
P
F
(
a
) T
o
p
vi
e
w
, a
n
d
(
b
)
C
r
oss se
ct
i
on at
2 l
a
y
e
r
s
3.
LTCC F
A
B
R
I
CATI
O
N
A
N
D
MEAS
U
R
E
M
EN
T OF MULTILAYER
END
COUPLED
B
A
N
D
P
A
SS FILE
R
Th
e
m
u
l
tilayer
EC
BPF
was
fab
r
i
cated
u
s
ing
state-o
f
-th
e
-art in
-ho
u
s
e TMR
N
D’s LTCC pro
cess
was d
e
scrib
e
d
in
[12
]
. Figu
re
7
sho
w
s fabricated
m
u
ltilayer
en
d
coup
led
BPF with
3
samp
les
m
a
rk
as sam
p
le
A, B
,
an
d C
.
T
h
e
det
a
i
l
phy
si
cal
di
m
e
nsi
ons
of
t
h
e LTC
C
B
PF are l
i
s
t
e
d
i
n
Tabl
e
3.
Al
l
t
h
e de
si
g
n
s c
o
m
p
li
ed
with
in-h
ou
se
TMRND’s LTCC d
e
sign
gu
id
elines
with m
i
nim
u
m
spacing at
100
m
b
e
tween lin
es.
96
um
PO
R
T
2
L1
L2
L3
L
T
CC F
E
RR
O
A
6
S
S
0,
1
S
1,2
S
2,3
S
3,
4
L0
L4
P
O
R
T
1
V
E
R
T
I
C
A
L
CO
UP
L
I
N
G
L
T
CC F
E
RR
O
A
6
S
L1
L2
L3
L0
L
4
(a
)
(b
)
Evaluation Warning : The document was created with Spire.PDF for Python.
In
d
onesi
a
n
J
E
l
ec En
g &
C
o
m
p
Sci
ISS
N
:
2
5
0
2
-
47
52
Mu
ltila
yer En
d Cou
p
l
ed
Ba
nd Pa
ss Filter u
s
i
n
g Lo
w-temp
era
t
u
r
e… (Zu
l
kifli Amba
k)
98
5
Fig
u
re
7
.
Fab
r
i
cated
LTCC m
u
ltilayer ECBPF with cond
u
c
t
o
r Go
ld
Tab
l
e
3
.
Design
an
d fab
r
icated
p
a
ram
e
ter for LTCC M
u
ltilayer ECBPF
Ite
m
DESI
GN A
ND
FA
BRICATE
D L
T
C
C
BPF D
I
ME
NSI
ON
Designed
F
abricated (
i
n
m)
Remarks
(i
n
m)
A B
C
S 0,
1
210
160
200
200
Over
lap
S 1,
2
30
30
25
30
Spacing
S 2,
3
30
30
25
30
Spacing
S 3,
4
210
160
200
200
Over
lap
L
0
1000
1000
1000
1000
L
1
1410
1446
1418
1486
L
2
1343
1333
1359
1370
L
3
1410
1446
1418
1486
Fi
gu
re
8(a
)
,
(
b
)
an
d
(c)
sh
o
w
t
h
e
m
easure
m
ent
resu
lts co
m
p
ared
with
si
m
u
latio
n
resu
lts fo
r the
Mu
ltilayer ECBPF is
b
a
sed on
th
e coup
led-reson
a
tor
f
ilter wh
ich
was realized
in
LTCC m
u
lt
ilayer su
bstrate
an
d op
er
atin
g
at th
e cen
t
er
fr
equ
e
n
c
y of
42
GH
z. Th
e si
m
u
la
ted
r
e
su
lts pr
esen
ted
i
n
Figu
r
e
9 sh
ow
s t
h
e
m
u
l
tilayer EC
BPF h
a
s cen
tered
at
42
GHz
with
in
sertio
n
lo
ss of
2
.
2
8
d
B
and
ret
u
rn
loss of 11
.66
d
B
. Th
e
sim
u
l
a
t
e
d
an
d m
easured
res
p
ons
es of
t
h
e d
e
si
gn we
re
s
u
mmarized in T
a
ble 4 for th
r
e
e (3
) sam
p
les
A, B,
and C
.
Al
l
t
h
e
m
easurem
ent
s
were
d
one
by
usi
n
g t
h
e R
&
S
ZV
A5
0
net
w
o
r
k a
n
al
y
zer a
n
d C
a
scad
e M
i
crot
ec
h
45
0
m
p
r
ob
e t
i
p
s
. Fro
m
th
e resu
lts, we
fo
und
th
at th
e sam
p
le C g
a
v
e
th
e best resu
lt co
m
p
ared
t
o
o
t
h
e
rs,
with
t
h
e i
n
se
rt
i
on l
o
ss an
d ret
u
r
n
l
o
ss
of
2.
4
3dB
and
2
2
.
8
1dB
,
r
e
spect
i
v
el
y
.
H
o
we
ve
r, t
h
e
m
easure
d
i
n
sert
i
on l
o
ss
at cen
ter
f
r
e
quen
c
y w
a
s 0.15d
B lar
g
er
th
an si
m
u
lated
r
e
sul
t
s
. A di
ffe
re
nt
m
i
ght
due t
o
sh
ri
n
k
a
g
es o
f
t
h
e
co
ndu
ctor layer wh
ich
resu
lts in
an in
crease o
f
sp
aci
ng
an
d g
a
p
o
f
each
filter section
.
Add
ition
a
lly, th
e
i
n
crease
d
i
n
se
r
t
i
on l
o
ss m
i
ght
be cause
d r
o
u
g
h
n
ess
of t
h
e f
i
red ci
rc
ui
t
s
. F
u
rt
herm
ore, t
h
e
m
easured
res
u
l
t
has
good a
g
reem
ent com
p
ared
t
o
si
m
u
lated
resu
lt.
(a
)
(b)
(c
)
Figu
re 8. Si
m
u
la
ted
and
m
easu
r
ed
resu
lts fo
r
LTCC EC
BPF a) Sam
p
le A
b
)
Sam
p
le B, and
c) Sam
p
le C
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
502
-47
52
I
ndo
n
e
sian
J Elec Eng
& Com
p
Sci, V
o
l. 10
,
No
.
3
,
Jun
e
2
018
:
98
0 – 98
8
98
6
Table
4.
S
im
ulat
ed and
m
eas
ured res
u
l
t
s
for
t
h
e m
u
lti
la
yer
E
C
BP
F
Para
m
e
ter
SIMU
LA
TED
AN
D M
E
ASUR
ED R
E
SUL
T
S
Ref
e
rences
Spec Si
m
u
lated
Measured
Unit
[8]
[10]
Unit
A B
C
Center
Fr
equency
42
42
42
42
42
GHz
34.
6
44.
2
GHz
Pass
bandwidth
3 4.
5
3.
5
4.
3
3.
5
3 2
Insertion Loss
(
S
21)
< 3
2.
28
5.
95
3.
93
2.
43
dB
2.
96
<3.
6
dB
Return Loss
(
S
11)
> 10
11.
66
20.
15
16.
03
22.
81
dB
19
>18
dB
T
opology
E
nd
Coupled
E
nd
Coupled
E
nd
Coupled
E
nd
Coupled
E
nd Coupled
LTCC
Substrate
Ferro
A6
S
Ferro
A6
S
Ferro
A6
S
Ferro
A6M
Dupont
943
Dielectri
c
constant,
r
5.
8
5.
8
5.
8
5.
9
7.
4
Size
Dim
e
nsion
(
a
fte
r
fir
e
d)
L
:
5.
82
m
m
W:2
.
5
m
m
H:0.
77
m
m
L
:
5.
85
m
m
W:2
.
5
m
m
H:0.
77
m
m
L:6
.
0
m
m
W:2
.
5
m
m
H:0.
77
m
m
mm
L
:
11.
7
m
m
W:6
.
6
m
m
H:1.
60
m
m
L:8
.
0
m
m
W:3
.
0
m
m
H:0.
55
m
m
4.
CO
NCL
USI
O
N
Th
is p
a
p
e
r pro
p
o
s
ed
th
e mu
ltilayer ECB
PF with
v
e
rt
ically
stack
ed 2
stag
e reson
a
tors and
6
gr
o
u
n
d
e
d
l
a
y
e
r
s
, a
fract
i
o
nal
ban
d
w
i
d
t
h
o
f
7.
14
% a
n
d
si
ze re
duct
i
o
n
o
f
30
% c
o
m
p
ari
ng
wi
t
h
a
n
e
qui
val
e
n
t
LTCC en
d
cou
p
l
ed
micro
s
trip
filter. Th
e ad
v
a
n
t
ag
e
o
f
the p
r
o
p
o
s
ed
stru
cture is to
o
v
erco
m
e
th
e p
r
o
b
l
em
w
ith
th
e p
l
an
a
r
s
t
r
u
c
t
u
r
e of
end
co
up
le
d BP
F du
e
to d
i
m
e
n
s
io
n
a
l lim
ita
tio
n
s
in
fabricatio
n tech
no
log
i
es.
Fro
m
th
e resu
lts, we
foun
d
t
h
at samp
le C g
a
v
e
th
e
b
e
st resu
lt
co
m
p
ared
to o
t
h
e
rs, with
t
h
e in
sertio
n
lo
ss and
retu
rn
l
o
ss o
f
2.
43
dB
and
2
2
.
8
1dB
,
respect
i
v
el
y
at
t
h
e cent
e
r
fr
eque
ncy
of
42
GHz
w
h
i
c
h
g
o
o
d
a
g
reem
ent
wi
t
h
sim
u
l
a
t
e
d resu
l
t
s
. As s
u
m
m
ari
zed, t
h
e
va
ri
at
i
ons
bet
w
e
e
n t
h
e m
easur
ed a
nd
desi
gn
ed di
m
e
nsi
o
n
s
wer
e
defi
ned a
nd m
easure
d
rel
a
t
i
v
e t
o
t
h
e gui
de
d
wavel
e
n
g
t
h
at
the design cent
e
r fre
quency
. There
f
ore, we
need
t
o
o
p
tim
ize th
e desig
n
in
t
h
e
n
e
x
t
stag
e fo
r fu
rth
e
r
im
p
r
ov
emen
t.
REFERE
NC
ES
[1]
Luca pergo
l
a.,"LTCC based
RF Frontends for
WLAN Applicat
ions and R
a
dio
over Fiber S
y
stems," P.H.D thesis
,
ETH Zur
i
ch
,200
7
[2]
H.
B.
Kim,
et al
,
“A Radio ov
e
r
Fibe
r base
d
Wire
le
ss Ac
ce
ss Ne
twork
Arc
h
ite
cture
for Rural Are
a
s.
”
P
r
oceeding
14th IST Mobile and Wir
e
less C
o
mmunicati
on S
u
mmit, Dresden,
German
y
,
June
2005.
[3]
S
y
am
s
u
ri Yaako
b
,
et al
.,“ 40-GHz ROF downli
nk sy
stem with SFP
modules,”
Microw. Opt. T
echnol. Lett
.,56
:
pp:900–903.
[4]
Al
y
H. Al
y,
e
t
al.
,
“
M
odeling
and Measur
em
e
n
ts of Novel Monolithi
c
Filt
ers,
“
Active and Passive Electronic
Components,
vol. 2008
, Article I
D
537069, 8
pag
e
s, 2008
.
[5]
S. B. Cohn, “Parallel-
coupled tr
ansmission-line-resonator filter
s
,”
IRE Transactions onMicro
wave Theory a
nd
Techniques,
vol. 6, no. 2, pp. 223
–231, 1998
.
[6]
E. G. Cr
istal
an
d S. Frankel
,
“
H
airpin-l
ine and
h
y
br
id
hairp
i
n-line/h
alf-wave pa
rallel-coup
led-line filters,”
IE
EE
Transactions on
Microwave Theo
ry and Tech
niqu
es,
vol. 20
, no
. 1
1
, pp
. 719–728
,
1972.
[7]
J. S. Wong, “Microstrip
ta
pped-
line f
ilter design
,”
IEEE Transactions on Microwa
ve Theory and
Techniques,
vol.
27, no
.1, pp. 44–
50,1979.
[8]
Xu Ziqiang
,
et
al., "34GHz Bandpass filter
for Lo
w-Tem
p
eratur
e Co-fir
e
d Ceram
i
c S
y
stem
in Package
Applica
tion",
Ch
inese Journal
o
f
Mechanical Eng
i
neering
,
Vol XX, No X, 2011.
[9]
Z. Ambak, et
al.,
"
D
esign of 4
0
GHz multilayer end coupl
ed
bandpass filter using LTCC technology,"
I
EEE
International Co
nference on
Semiconduc
tor Electronics (ICSE201
4),pp.294-297
,2
014
[10]
Min-Soo Kang, et al.,
“End Coupled Stripl
i
n
e BP
F Using LTCC in Millimeter-Wave,”
24th
Intern
ation
a
l
Conferenc
e
on
Microwave
an
d
Millim
e
t
er
W
a
ve
T
echnol
og
y
Proceed
ing
s
,2004.
[11]
J.-S. Hong and M. J. Lancaster, “T
heor
y
and
experiment of n
ovel micr
ostrip
slow-wave open-loop resonator
filte
rs,”
IEEE Transactions on M
i
crowave Theory and Techn
i
ques
, vol. 45, no.12
, p
a
rt 2
,
pp
. 2358–2
365, 1997
.
[12]
Hizan, H.
M,
et
al.
,
“Q-band
millimet
er-wave SIW f
ilt
er usi
ng LTCC techn
o
logy”.
2014
I
EEE Asia-Pacif
i
c
Conference
on
Applied Electro
m
agne
tics, APACE 2014 -
Proceeding, pp.199–2
02.
Evaluation Warning : The document was created with Spire.PDF for Python.
In
d
onesi
a
n
J
E
l
ec En
g &
C
o
m
p
Sci
ISS
N
:
2
5
0
2
-
47
52
Mu
ltila
yer En
d Cou
p
l
ed
Ba
nd Pa
ss Filter u
s
i
n
g Lo
w-temp
era
t
u
r
e… (Zu
l
kifli Amba
k)
98
7
BIOGRAP
HI
ES
OF AUTH
ORS
Zulkifli Ambak is a Sen
i
or R
e
search
er
at
Co
mmunication Technolog
ies Div
i
sion, Telekom
Mala
y
s
ia Rese
ar
ch and Develop
m
ent (TM R&D).
He receiv
e
d
the B. Eng. (w
ith Honors) in
Electrical
and
Electronic Engineering from th
e
Manchest
er Metropolit
an
U
n
iversit
y
,UK. in
1998. Upon graduation, he jo
in
ed Sharp Electronic Malay
s
ia
Sdn Bhd as an
R&D Engineer
involved
in R&D for design
and
developed
telev
i
sion brand SHAR
P for NTSC an
d PAL market.
After 8
y
e
ars a
t
Sharp Elec
tro
n
ic Mala
ysi
a
S
dn Bhd, he decide to join TM
Research and
Developm
ent Sdn Bhd in Dec 20
06 as Research
e
r
until now. His
research pro
j
e
c
ts
include
Low
tem
p
eratur
e c
o
–fired C
e
ram
i
c (
LTCC) t
echno
lo
gies
, m
i
crowav
e
filt
ers
and
ant
e
nna, m
i
l
lim
eter
wave transc
eive
rs sy
st
em
, Radi
o-over-fiber (Ro
F
), LTE and W
i
Fi techno
logies
. Som
e
of the
projects which
h
e
has
involved
h
a
d been
awarde
d the Winner of
Best Br
oadb
and Partnership at
Broadband Info
vision Awards on Green Collabora
tion Optical Radio Network
(G-CORN) a
t
Amsterdam, Netherland
(2014),
Me
rit Award on
Green Fib
e
r Wireless (G-FiWi)
Techno
log
y
in
Asia Pacific IC
T (APICTA 20
13), Malay
s
ia
and Merit Award on Vital Wireless Dongle (V-
WiD) Technolo
g
y
in Asia Pacific ICT (APICT
A 2017), Malay
s
ia. Currently
, h
e
is doing his
PHD Industr
y
in
School of
Grad
uate Studies
at Universiti Teknologi
Malay
s
ia since 2012
.
Dr. Hizamel is a Senior Research
er at Communi
cation Technolog
ies Divisi
on, TM Research and
Development Sd
n Bhd. He receiv
ed the B
.
Eng
.
(
w
ith Honors) in Electronic and C
o
mmunication
Engineering f
r
o
m
the University
o
f
York, U.K
.
in
1999, M.Sc. (with
Di
stin
ction) in RF
and
Communication Engineering fr
om the Univers
i
ty
of Br
adford, U.K. in 2003
and Ph.D.
in
Electronic and Electrical Engineering from Universi
ty
of Leeds, U
.
K. in 2011. Upon graduation
,
he join
ed
Telek
o
m Malay
s
ia
as
an Eng
i
neer
in
v
o
lved in
var
i
ous tec
hnologies fr
om WCDMA to
WDM sy
stem
s. He
is an
Edi
t
o
rial
Board m
e
m
b
er of TM R
&
D publi
cat
ion
com
m
ittee. His
research pro
j
ec
ts include i
n
tegr
at
ed m
i
crowave fi
lters and an
tenn
a, m
illim
et
er wa
ve transc
eivers
s
y
stem, Radio-o
v
er-fiber (RoF) and WiFi techn
o
l
ogies. He has been a memb
er of Industrial
Advisor
y
Board
(IAB) at Cen
t
r
e
on Optic
al W
i
reless Applic
ati
on (COW
A), Nation
a
l Sci
e
nc
e
Foundation at Georgia Institute
of Technolog
y
,
Atla
nta, USA.
Some of the pro
j
ects which he
has involved had been award
e
d the Winner of
Best Broadband Part
nership
at Broadband
Infovision Awards on Green Collabor
ation Optical
Radio Netw
ork at Amsterdam, Netherland
(2014) and Merit Award on Green Fiber Wirele
ss Technolog
y
in Asia Pacific
ICT (APICTA
2013), Mala
y
s
i
a
. Dr. Hizam
el i
s
a m
e
m
b
er of I
EEE (MTT
/AP/EMC) and Boar
d of Engineers
Mala
y
s
ia
.
Ahmad Ismat Abdul Rahim (dri
smat@tmrnd.com.my
)
was born
in
Penang
, Malay
s
ia in
1971.
He rec
e
ived
his
B.Eng (Hons
.)
in El
ec
tric
al
E
ngineer
ing, M
S
c. in
M
i
cro
e
le
ct
ronics
S
y
s
t
em
s
Design and Ph.D in Microelectronics in
1994
, 1995 and 19
99 respectively
,
all from the
University
of Southampton,
En
gland, U.K
.
He was Technol
o
g
y
Developmen
t Lead
er with
MIMOS Berhad (www.mi
mos.my
)
involved in
the development of
0.35um CMOS, BiCMO
S
and SiGe tech
nologies; Wafer Fabrication
Specia
list &
T
C
AD Sales Engineer for
IC
Micros
y
s
tems Sdn.
Bhd.
(www.
icmic.
com) and
Senior Design Engineer
,
Penang Design Center,
Intel Microelectronics (M) Sdn.
Bhd. responsib
le for d
e
sign-pr
ocess inter
a
ctio
n analy
s
is
and
device ph
y
s
ics-
design investig
ation and for P1
263 (90nm) proce
ss model char
acterization
for
next gener
a
tion
chips
e
t des
i
gn
. He is
currentl
y
As
s
o
ciate P
r
inci
pal Res
ear
cher i
n
the Advanced
Ph
y
s
ical Laborator
y
at Telekom
Malay
s
ia R&D
Sdn. Bhd. (ww
w
.tmrnd.com.my
)
,
involv
e
d in
the dev
e
lopment of MMICs and RFICs for applic
ations in Rad
i
o-Over-Fiber (R
OF) and Fiber
Wireless (FiWi) s
y
stems for G
bps Next Generation Broadband
communication sy
stems. Ahmad
Ismat has published over 50 technical papers
an
d f
ile
d 4 pa
te
nts.
His re
se
a
r
c
h
inte
re
sts a
r
e
in
device
and circu
it d
e
sign and
modeling
for MMI
Cs and RFICs.
Azmi Ibrahim is a Researcher
at Communicat
ion Technolog
ies Division, TM Research and
Development Sd
n Bhd. He recei
ved th
e B.Sc. (
H
ons) and M.Sc
i
n
Phy
s
i
c
s from T
h
e
Na
ti
ona
l
University
of Malay
s
ia in 20
02 and 2008 respec
tiv
ely
.
His
research pro
j
ects include Low
tem
p
eratur
e c
o
–fired C
e
ram
i
c (
LTCC) t
echno
lo
gies
, m
i
crowav
e
filt
ers
and
ant
e
nna, m
i
l
lim
eter
wave tr
ansceiver
s
s
y
stem, R
a
dio-
over-fibe
r
(RoF)
,
LTE and
WiFi
techno
logies.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
502
-47
52
I
ndo
n
e
sian
J Elec Eng
& Com
p
Sci, V
o
l. 10
,
No
.
3
,
Jun
e
2
018
:
98
0 – 98
8
98
8
Mohd Zulfadli Mohamed Yu
soff is a Resear
ch
er at Co
nnected Mobility
Unit unde
r
Communication Technologies
Divi
sion,
Telek
o
m Malay
s
ia R
e
search
and
Development (
T
M
R&D). He received the B.
Eng.
(with Honors) in
Mechanical
and
Material Engin
e
ering from the
National Univer
sity
of Malay
s
ia in 2004. Upon
graduation, he
joined Kein Hin
g
Industri Sdn
Bhd as Quality
Engineer for tak
i
ng responsibility
th
e quality
of
a compan
y
'
s pro
ducts. After 3
y
e
ars at Kein Hing, he decide to
join TM
Research and Develop
m
ent Sdn Bhd i
n
March 2008
as Researche
r
until now. His research proj
ec
ts
include Low t
e
m
p
erature
co –fired Ceram
i
c
(LTCC) technol
ogies, m
i
crowave filt
ers and an
tenna, m
illim
eter wave transceivers s
y
st
em
,
Radio-over-f
iber
(RoF
), LTE a
nd W
i
F
i
techn
o
logies. S
o
m
e
of the proje
c
ts
which he has
involved h
a
d b
e
en award
e
d th
e
Winner of Best
Broadband Par
t
n
e
rship at Broadb
and Infovision
Awards on Green Collaboration
Optical Radio Ne
twork (G-CORN) at Amsterdam, Netherland
(2014), Merit
Award on Green Fiber Wireles
s
(G-FiWi) Technolog
y
in Asia Pacif
i
c IC
T
(APICTA 2013)
, Malay
s
ia
and Merit Award on V
ital Wireless Dongle (V
-WiD) Technolog
y
in
Asia Pacif
i
c ICT (APICTA 2017), Malay
s
ia.
Razali Ngah
received
the Ph.D.
degree from th
e
University
of
No
rthumbria, United Kingdom, in
2005. Since 198
9, he h
a
s been
with the Facult
y
of Electr
ical En
gineer
ing, Univ
ersiti T
e
knologi
M
a
la
y
s
ia (UTM
), where he is
currentl
y
a As
s
o
ciate P
r
ofes
s
o
r. He is
als
o
the Deput
y
Dire
ctor of
W
i
reles
s
Comm
unication Ce
ntre in UTM
.
His
res
earch
interes
t
s
inc
l
u
d
e antenn
as
an
d
propagation for
communications
, rad
i
o ov
er f
i
ber
and pho
tonic networks.
Evaluation Warning : The document was created with Spire.PDF for Python.