Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model 1C403
Rev. B
Hybrid Couplers
3 dB, 90
Description
The 1C403 is a low profile, miniature 3dB hybrid coupler in an easy to use
surface mount package designed for AMPS applications. The 1C403 is
designed for balanced amplifiers and signal distribution and is an ideal
solution for the ever-increasing demands of the wireless industry for smaller
printed circuit boards. Parts have been subjected to rigorous qualification
testing and units are 100% tested. They are manufactured using materials
with x and y thermal expansion coefficients compatible with common
substrates such as FR4, G-10 and polyamide.
ELECTRICAL
SPECIFICATIONS**
Frequency
Isolation
Insertion
Loss
VSWR
MHz
dB Min
dB Max
Max:1
810 - 885
20
0.30
1.20
Amplitude
Balance
Phase
Balance
Power
JC
Operating
Temp.
dB Max
Degrees
Ave. CW Watts
C/Watt
C
Features:
810 - 885 MHz
High Power
Very Low Loss
High Isolation
90
o
Quadrature
Surface Mountable
Tape and Reel
Convenient Package
100% Tested
0.25
3
115
25.4
-55 to +85
**Specification based on performance of unit properly installed on microstrip printed circuit boards
with 50
nominal impedance. Specifications subject to change without notice.
Outline Drawing
1C403 Rev A Mechanical Outline
Dimensions are in Inches [Millimeters]
Side View
Top View (Near-side)
Bottom View (Far-side)
.354
.010
[9.0
0.25
]
.275
.010
[7.0
0.25
]
.110
.011
[2.80
0.28
]
Orientation
Marker Denotes
Top of Part
Denotes Array
Number
GND
Pin 1
Pin 2
Pin 3
Pin 4
Pin 2
Pin 3
Pin 1
Pin 4
4X .032
.004
[0.81
0.10
]
4X .023
.004
[0.58
0.10
]
4X .055
.004
[1.40
0.10
]
.234
.004
[5.94
0.10
]
.219
.004
[5.56
0.10
]
Tolerances are Non-Cumulative
GND
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
Model 1C403
Rev. B
Typical Performance: 700 MHz. to 1000 MHz.
Coupling 1C403
-3.8
-3.5
-3.2
-2.9
-2.6
700
750
800
850
900
950
1000
Frequency (MHz)
C
oupl
i
ng (
d
B
)
Return Loss 1C403
-50
-40
-30
-20
-10
0
700
750
800
850
900
950
1000
Frequency (MHz)
R
e
t
u
rn
L
o
s
s
(d
B
)
Isolation 1C403
-50
-40
-30
-20
-10
700
750
800
850
900
950
1000
Frequency (MHz)
I
s
ol
at
i
on (
d
B
)
Phase Balance 1C403
-93
-92
-91
-90
-89
-88
-87
700
750
800
850
900
950
1000
Frequency (MHz)
P
hase B
a
l
anc
e (
D
egr
ees
)
AMPLITUDE BALANCE
3dB hybrids are a type of backward wave coupler. In
the design of these couplers, the even mode
impedance was chosen to `critically couple' or slightly
`over couple' at mid band to maximize performance and
bandwidth. The amplitude balance specification is
defined as the decibel difference between the two
output curves.
PHASE BALANCE
In theory, output ports of a backward wave hybrid
coupler remain in perfect phase quadrature
independent of frequency. In practice, factors
associated with the manufacturing processes slightly
degrade performance. The specification is typically two
to three degrees maximum. In practice, phase is
statistically better than the specified value (<1
o
).
VSWR & ISOLATION
Similar to phase balance, the VSWR and isolation of
a coupler are theoretically perfect; where the input
and output ports are perfectly matched and no power
is coupled to the isolated port. In practice, factors
associated with the design and manufacturing
processes limit VSWR and isolation. The significant
limitations are associated with limitations of building
perfect 50
transitions at the input and output ports
of the device.
INSERTION LOSS
Coupler insertion loss is defined as the difference of
the input power from the sum of the output power. In
practice, loss is typically 0.20 dB. Specification limits
are somewhat higher due to imperfect test
conditions; as the couplers must be tested in fixtures
that negatively affect results.
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model 1C403
Rev. B
PIN CONFIGURATION
The 1C403's have an orientation marker to denote the
topside of the part. The part however can be rotated
about the z-axis so that any pin can be used as the input
port as described by the chart above.
MOUNTING
In order for Xinger surface mount couplers to work
optimally, there must be 50
transmission lines leading
to and from all of the RF ports. Also, there must be a
very good ground plane under the part to ensure proper
electrical performance. If either of these two conditions
are not satisfied, insertion loss, coupling, VSWR and
isolation may not meet published specifications.
Overall ground is improved if a dense population of
plated through holes connect the top and bottom ground
layers of the PCB. This minimizes ground inductance
and improves ground continuity. All of the Xinger hybrid
and directional couplers are constructed from ceramic
filled PTFE composites that possess excellent electrical
and mechanical stability having X and Y thermal
coefficient of expansion (CTE) of 17 ppm/
o
C.
When a surface mount hybrid coupler is mounted to a
printed circuit board, the primary concerns are;
ensuring the RF pads of the device are in contact with
the circuit trace of the PCB and insuring the ground
plane of neither the component nor the PCB is in
contact with the RF signal. As long as the geometry
of the unit fits onto the layout of the circuit trace on
the PCB, and the conditions of the previous
paragraph are followed, the coupler's performance is
ensured. An example of how the PCB footprint could
look is shown below. In specific designs, the 50
lines need to be adjusted to the unique dielectric
coefficients and thicknesses as well as varying pick
and place equipment tolerances. To ensure proper
electrical and thermal performance there must be a
ground plane with 100% solder connection
underneath the part.
SUGGESTED FOOTPRINT
1C403 Rev A Mounting Footprint
Dimensions are in Inches [Millimeters]
.219
[5.56]
.234
[5.94]
4X 50
Transmission
Line
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
4X .067 SQ
[1.70]
4X .066
[1.69]
4X .032
[0.81]
4X .066
[1.69]
4X .032
[0.81]
.275
[6.99]
Multiple
plated thru holes
to ground
PDF 
ZIP