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Model XC1900A
-
05
Rev C
5 dB Directional Coupler
Description
The XC1900A-05 is a low profile, high performance 5dB directional coupler
in a new easy to use, manufacturing friendly surface mount package. It is
designed for DCS and PCS applications. The XC1900A-05 is designed
particularly for non-binary split and combine in high power amplifiers, e.g.
used along with a 3dB to get a 3-way, plus other signal distribution
applications where low insertion loss is required. It can be used in high
power applications up to 200 Watts.
Parts have been subjected to rigorous qualification testing and they are
manufactured using materials with coefficients of thermal expansion (CTE)
compatible with common substrates such as FR4, G-10, RF-35, RO4350,
and polyimide.
Electrical Specifications
**
Frequency Mean
Coupling Insertion
Loss VSWR Phase
Balance
MHz dB dB Max Max : 1 Degrees
1700-2000 5.0 ± 0.22 0.15 1.15 90±2.0
1805-1880 5.0 ± 0.19 0.12 1.12 90±2.0
1930-1990 5.0 ± 0.19 0.12 1.12 90±2.0
Directivity Frequency
Sensitivity Power Θ
ΘΘ
ΘJC Operating
Temp.
dB Min dB Max Avg. CW Watts ºC/Watt ºC
23 ± 0.05 200 17.5 -55 to +95
25 ± 0.03 200 17.5 -55 to +95
Features:
• 1700 – 2000 MHz
• DCS and PCS
• High Power
• Very Low Loss
• Tight Coupling
• High Directivity
• Production Friendly
• Tape and Reel
• Available in Lead-Free (as
illustrated) or Tin-Lead
• Reliable, FIT=0.53 25 ± 0.03 200 17.5 -55 to +95
**Specification based on performance of unit properly installed on Anaren Test Board 58481-0001 with small
signal applied. Specifications subject to change without notice. Refer to parameter definitions for details.
XC1900A-05* Mechanical Outline
Dimensions are in Inches [Millimeters]
Side View
.064
±.006
[1.62
±0.15
]
Bottom View (Far-Side)
Top View (Near-Side)
Denotes
Array Number
4X .040
±.004
[1.02
±0.10
]
4X .059
±.004
SQ
[1.50
±0.10
]
.430
±.004
[10.92
±0.10
]
.220
±.004
[5.59
±0.10
]
GND
GND
Pin 1 Pin 2
Pin 3
Pin 4
Pin 1
Pin 2
Pin 4
Pin 3
.560
±.010
[14.22
±0.25
]
.350
±.010
[8.89
±0.25
]
Orientation
Marker Denotes
Pin 1
* = Plating Finish
Tolerances are Non-Cumulative
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Model XC1900A
-
Rev C
Directional Coupler Pin Configuration
The XC1900A-05 has an orientation marker to denote Pin 1. Once port one has been identified the other ports are
known automatically. Please see the chart below for clarification:
Pin 1 Pin 2 Pin 3 Pin 4
Input Isolated Direct Coupled
Isolated Input Coupled Direct
Direct Coupled Input Isolated
Coupled Direct Isolated Input
Note: The direct port has a DC connection to the input port and the coupled port has a DC connection to the
isolated port.
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-
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Rev C
Insertion Loss and Power Derating Curves
Insertion Loss Derating:
The insertion loss, at a given frequency, of a group of
couplers is measured at 25°C and then averaged. The
measurements are performed under small signal
conditions (i.e. using a Vector Network Analyzer). The
process is repeated at 95°C, 150°C, and 200°C. A best-
fit line for the measured data is computed and then
plotted from -55°C to 300°C.
Power Derating:
The power handling and corresponding power derating
plots are a function of the thermal resistance, mounting
surface temperature (base plate temperature),
maximum continuous operating temperature of the
coupler, and the thermal insertion loss. The thermal
insertion loss is defined in the Power Handling section of
the data sheet.
As the mounting interface temperature approaches the
maximum continuous operating temperature, the power
handling decreases to zero.
-100 -50 0 50 100 150 200 250 300 350
-0.2
-0.18
-0.16
-0.14
-0.12
-0.1
-0.08
-0.06
-0.04
-0.02
0
Temperature of the Part (ºC)
I
n
s
e
r
t
i
o
n
L
o
s
s
(
d
B
)
Typical Insertion Loss Derating Curve for XC1900A-05
typical insertion loss (f=1880MHz)
typical insertion loss (f=1990MHz)
typical insertion loss (f=2000MHz)
0 25 50 75 100 125 150 175 200 225 250 275 300
0
25
50
75
100
125
150
175
200
225
250
275
Base Plate Temperature (ºC)
P
o
w
e
r
(
W
a
t
t
s
)
Power Derating Curve for XC1900A-05
power handling at 1880MHz
power handling at 1990MHz
power handling at 2000MHz
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-
Rev C
Typical Performance (-55°C, 25°C and 95°C): 1700-2000 MHz
1700 1750 1800 1850 1900 1950 2000
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (MHz)
R
e
t
u
r
n
L
o
s
s
(
d
B
)
Return Loss for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (MHz)
R
e
t
u
r
n
L
o
s
s
(
d
B
)
Return Loss for XC1900A-05 (Feeding Port 2)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (MHz)
R
e
t
u
r
n
L
o
s
s
(
d
B
)
Return Loss for XC1900A-05 (Feeding Port 3)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (MHz)
R
e
t
u
r
n
L
o
s
s
(
d
B
)
Return Loss for XC1900A-05 (Feeding Port 4)
- 55ºC
25ºC
95ºC
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-
05
Rev C
Typical Performance (-55°C, 25°C and 95°C): 1700-2000 MHz
1700 1750 1800 1850 1900 1950 2000
-5.5
-5.4
-5.3
-5.2
-5.1
-5
-4.9
-4.8
-4.7
-4.6
-4.5
Frequency (MHz)
C
o
u
p
l
i
n
g
(
d
B
)
Coupling for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (MHz)
D
i
r
e
c
t
i
v
i
t
y
(
d
B
)
Directivity for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
87
88
89
90
91
92
93
Frequency (MHz)
P
h
a
s
e
B
a
l
a
n
c
e
(
D
e
g
r
e
e
s
)
Phase Balance for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-2
-1.95
-1.9
-1.85
-1.8
-1.75
-1.7
-1.65
-1.6
-1.55
-1.5
Frequency (MHz)
T
r
a
n
s
m
i
s
s
i
o
n
L
o
s
s
(
d
B
)
Transmission Loss for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
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-
Rev C
Typical Performance (-55°C, 25°C and 95°C): 1700-2000 MHz
1700 1750 1800 1850 1900 1950 2000
-0.16
-0.14
-0.12
-0.1
-0.08
-0.06
-0.04
-0.02
0
Frequency (MHz)
I
n
s
e
r
t
i
o
n
L
o
s
s
(
d
B
)
Insertion Loss for XC1900A-05 (Feeding Port 1)
- 55ºC
25ºC
95ºC
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-
05
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Definition of Measured Specifications
Parameter Definition Mathematical Representation
VSWR
(Voltage Standing Wave Ratio)
The impedance match of
the coupler to a 50Ω
system. A VSWR of 1:1 is
optimal.
VSWR =
min
max
V
V
Vmax = voltage maxima of a standing wave
Vmin = voltage minima of a standing wave
Return Loss
The impedance match of
the coupler to a 50Ω
system. Return Loss is
an alternate means to
express VSWR.
Return Loss (dB)= 20log
1
-
VSWR
1VSWR
+
Mean Coupling
At a given frequency (ω
n
),
coupling is the input
power divided by the
power at the coupled
port. Mean coupling is
the average value of the
coupling values in the
band. N is the number of
frequencies in the band.
Coupling (dB) =
=
)(P
)(P
log10)(
cpl
in
n
n
n
C
ω
ω
ω
Mean Coupling (dB) =
N
C
N
n
n
=1
)(
ω
Insertion Loss The input power divided
by the sum of the power
at the two output ports. 10log
direct cpl
in
PP
P
+
Directivity
The power at the
coupled port divided by
the power at the isolated
port.
10log
iso
cpl
P
P
Phase Balance The difference in phase
angle between the two
output ports. Phase at coupled port – Phase at direct port
Frequency Sensitivity
The decibel difference
between the maximum in
band coupling value and
the mean coupling, and
the decibel difference
between the minimum in
band coupling value and
the mean coupling.
Max Coupling (dB) – Mean Coupling (dB)
and
Min Coupling (dB) – Mean Coupling (dB)
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Notes on RF Testing and Circuit Layout
The XC1900A-05 Surface Mount Couplers require the use of a test fixture for verification of RF performance. This test
fixture is designed to evaluate the coupler in the same environment that is recommended for installation. Enclosed
inside the test fixture, is a circuit board that is fabricated using the recommended footprint. The part being tested is
placed into the test fixture and pressure is applied to the top of the device using a pneumatic piston. A four port Vector
Network Analyzer is connected to the fixture and is used to measure the S-parameters of the part. Worst case values
for each parameter are found and compared to the specification. These worst case values are reported to the test
equipment operator along with a Pass or Fail flag. See the illustrations below.
3 & 5 dB
Test Board
10 & 20 dB
Test Board
Test Board
In Fixture
Test Station
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-
05
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The effects of the test fixture on the measured data must be minimized in order to accurately determine the
performance of the device under test. If the line impedance is anything other than 50Ω and/or there is a discontinuity
at the microstrip to SMA interface, there will be errors in the data for the device under test. The test environment can
never be “perfect”, but the procedure used to build and evaluate the test boards (outlined below) demonstrates an
attempt to minimize the errors associated with testing these devices. The lower the signal level that is being
measured, the more impact the fixture errors will have on the data. Parameters such as Return Loss and
Isolation/Directivity, which are specified as low as 27dB and typically measure at much lower levels, will present the
greatest measurement challenge.
The test fixture errors introduce an uncertainty to the measured data. Fixture errors can make the performance of the
device under test look better or worse than it actually is. For example, if a device has a known return loss of 30dB and
a discontinuity with a magnitude of –35dB is introduced into the measurement path, the new measured Return Loss
data could read anywhere between –26dB and –37dB. This same discontinuity could introduce an insertion phase
error of up to 1°.
There are different techniques used throughout the industry to minimize the affects of the test fixture on the
measurement data. Anaren uses the following design and de-embedding criteria:
• Test boards have been designed and parameters specified to provide trace impedances of 50
±1Ω. Furthermore, discontinuities at the SMA to microstrip interface are required to be less than
–35dB and insertion phase errors (due to differences in the connector interface discontinuities
and the electrical line length) should be less than ±0.25° from the median value of the four
paths.
• A “Thru” circuit board is built. This is a two port, microstrip board that uses the same SMA to
microstrip interface and has the same total length (insertion phase) as the actual test board. The
“Thru” board must meet the same stringent requirements as the test board. The insertion loss
and insertion phase of the “Thru” board are measured and stored. This data is used to
completely de-embed the device under test from the test fixture. The de-embedded data is
available in S-parameter form on the Anaren website (www.anaren.com).
Note: The S-parameter files that are available on the anaren.com website include data for frequencies that are
outside of the specified band. It is important to note that the test fixture is designed for optimum performance through
2.3GHz. Some degradation in the test fixture performance will occur above this frequency and connector interface
discontinuities of –25dB or more can be expected. This larger discontinuity will affect the data at frequencies above
2.3GHz.
Circuit Board Layout
The dimensions for the Anaren test board are shown below. The test board is printed on Rogers RO4350 material
that is 0.030” thick. Consider the case when a different material is used. First, the pad size must remain the same to
accommodate the part. But, if the material thickness or dielectric constant (or both) changes, the reactance at the
interface to the coupler will also change. Second, the linewidth required for 50Ω will be different and this will introduce
a step in the line at the pad where the coupler interfaces with the printed microstrip trace. Both of these conditions will
affect the performance of the part. To achieve the specified performance, serious attention must be given to the
design and layout of the circuit environment in which this component will be used.
If a different circuit board material is used, an attempt should be made to achieve the same interface pad reactance
that is present on the Anaren RO4350 test board. When thinner circuit board material is used, the ground plane will
be closer to the pad yielding more capacitance for the same size interface pad. The same is true if the dielectric
constant of the circuit board material is higher than is used on the Anaren test board. In both of these cases,
narrowing the line before the interface pad will introduce a series inductance, which, when properly tuned, will
compensate for the extra capacitive reactance. If a thicker circuit board or one with a lower dielectric constant is used,
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-
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the interface pad will have less capacitive reactance than the Anaren test board. In this case, a wider section of line
before the interface pad (or a larger interface pad) will introduce a shunt capacitance and when properly tuned will
match the performance of the Anaren test board.
Notice that the board layout for the 3dB and 5dB couplers is different from that of the 10dB and 20dB couplers. The
test board for the 3dB and 5dB couplers has all four traces interfacing with the coupler at the same angle. The test
board for the 10dB and 20dB couplers has two traces approaching at one angle and the other two traces at a different
angle. The entry angle of the traces has a significant impact on the RF performance and these parts have
been optimized for the layout used on the test boards shown below.
10 & 20dB Test Board 3 & 5dB Test Board
Testing Sample Parts Supplied on Anaren Test Boards
If you have received a coupler installed on an Anaren produced microstrip test board, please remember to remove the
loss of the test board from the measured data. The loss is small enough that it is not of concern for Return Loss and
Isolation/Directivity, but it should certainly be considered when measuring coupling and calculating the insertion loss
of the coupler. An S-parameter file for a “Thru” board (see description of “Thru” board above) will be supplied upon
request. As a first order approximation, one should consider the following loss estimates:
Frequency Band Avg. Ins. Loss of Test Board @ 25°
°°
°C
800 – 1000 MHz ~ 0.07dB
1700 – 2300 MHz ~ 0.12dB
For example, a 1900MHz, 10dB coupler on a test board may measure –10.30dB from input to the coupled port at
some frequency, F1. When the loss of the test board is removed, the coupling at F1 becomes -10.18dB (-10.30dB +
0.12dB). This compensation must be made to both the coupled and direct path measurements when calculating
insertion loss.
The loss estimates in the table above come from room temperature measurements. It is important to note that the
loss of the test board will change with temperature. This fact must be considered if the coupler is to be evaluated at
other temperatures.
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-
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Peak Power Handling
High-Pot testing of these couplers during the qualification procedure resulted in a minimum breakdown voltage of
1.7KV (minimum recorded value). This voltage level corresponds to a breakdown resistance capable of handling at
least 12dB peaks over average power levels, for very short durations. The breakdown location consistently occurred
across the air interface at the coupler contact pads (see illustration below). The breakdown levels at these points will
be affected by any contamination in the gap area around these pads. These areas must be kept clean for optimum
performance. It is recommended that the user test for voltage breakdown under the maximum operating conditions
and over worst case modulation induced power peaking. This evaluation should also include extreme environmental
conditions (such as high humidity).
Orientation Marker
A printed circular feature appears on the top surface of the coupler to designate Pin 1. This orientation marker is not
intended to limit the use of the symmetry that these couplers exhibit but rather to facilitate consistent placement of
these parts into the tape and reel package. This ensures that the components are always delivered with the same
orientation. Refer to the table on page 2 of the data sheet for allowable pin configurations.
Test Plan
Xinger II couplers are manufactured in large panels and then separated. A sample population of parts is RF small
signal tested at room temperature in the fixture described above. All parts are DC tested for shorts/opens. (See
“Qualification Flow Chart” section for details on the accelerated life test procedures.)
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Power Handling
The average power handling (total input power) of a Xinger coupler is a function of:
• Internal circuit temperature.
• Unit mounting interface temperature.
• Unit thermal resistance
• Power dissipated within the unit.
All thermal calculations are based on the following assumptions:
• The unit has reached a steady state operating condition.
• Maximum mounting interface temperature is 95
o
C.
• Conduction Heat Transfer through the mounting interface.
• No Convection Heat Transfer.
• No Radiation Heat Transfer.
• The material properties are constant over the operating temperature range.
Finite element simulations are made for each unit. The simulation results are used to calculate the unit thermal
resistance. The finite element simulation requires the following inputs:
• Unit material stack-up.
• Material properties.
• Circuit geometry.
• Mounting interface temperature.
• Thermal load (dissipated power).
The classical definition for dissipated power is temperature delta (
∆
T) divided by thermal resistance (R). The
dissipated power (P
dis
) can also be calculated as a function of the total input power (P
in
) and the thermal insertion loss
(IL
therm
):
)(101
10
WP
R
T
P
therm
IL
indis
−⋅=
∆
=
−
(1)
Power flow and nomenclature for an “X” style coupler is shown in Figure 1.
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-
05
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Pin 1
Pin 4
Input Port
Coupled Port Direct Port
Isolated Port
P
In
P
Out
(RL) P
Out
(ISO)
POut(CPL) POut(DC)
Figure 1
The coupler is excited at the input port with P
in
(watts) of power. Assuming the coupler is not ideal, and that there are
no radiation losses, power will exit the coupler at all four ports. Symbolically written, P
out(RL)
is the power that is
returned to the source because of impedance mismatch, P
out(ISO)
is the power at the isolated port, P
out(CPL)
is the
power at the coupled port, and P
out(DC)
is the power at the direct port.
At Anaren, insertion loss is defined as the log of the input power divided by the sum of the power at the coupled and
direct ports:
Note: in this document, insertion loss is taken to be a positive number. In many places, insertion loss is written as a
negative number. Obviously, a mere sign change equates the two quantities.
)dB(
PP
P
log10IL
)DC(out)CPL(out
in
10
+
⋅=
(2)
In terms of S-parameters, IL can be computed as follows:
)dB(SSlog10IL
2
41
2
3110
+⋅−=
(3)
We notice that this insertion loss value includes the power lost because of return loss as well as power lost to the
isolated port.
For thermal calculations, we are only interested in the power lost “inside” the coupler. Since P
out(RL)
is lost in the
source termination and P
out(ISO)
is lost in an external termination, they are not be included in the insertion loss for
thermal calculations. Therefore, we define a new insertion loss value solely to be used for thermal calculations:
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-
Rev C
)(log10
)()()()(
10
dB
PPPP
P
IL
RLoutISOoutDCoutCPLout
in
therm
+++
⋅=
(4)
In terms of S-parameters, IL
therm
can be computed as follows:
)(log10
2
41
2
31
2
21
2
1110
dBSSSSIL
therm
+++⋅−=
(5)
The thermal resistance and power dissipated within the unit are then used to calculate the average total input power
of the unit. The average total steady state input power (P
in
) therefore is:
)(
101101
1010
W
R
T
P
P
thermtherm
ILIL
dis
in
−
∆
=
−
=
−−
(6)
Where the temperature delta is the circuit temperature (T
circ
) minus the mounting interface temperature (T
mnt
):
)( CTTT
o
mntcirc
−=∆
(7)
The maximum allowable circuit temperature is defined by the properties of the materials used to construct the unit.
Multiple material combinations and bonding techniques are used within the Xinger II product family to optimize RF
performance. Consequently the maximum allowable circuit temperature varies. Please note that the circuit
temperature is not a function of the Xinger case (top surface) temperature. Therefore, the case temperature cannot
be used as a boundary condition for power handling calculations.
Due to the numerous board materials and mounting configurations used in specific customer configurations, it is the
end users responsibility to ensure that the Xinger II coupler mounting interface temperature is maintained within the
limits defined on
the power derating plots for the required average power handling. Additionally appropriate solder
composition is required to prevent
reflow or
fatigue failure at the RF ports. Finally, reliability is improved when the
mounting interface and RF port temperatures are kept to a minimum.
The power-derating curve illustrates how changes in the mounting interface temperature result in converse changes
of the power handling of the coupler.
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-
05
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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 underneath the part to ensure
proper electrical performance. If either of these two
conditions is not satisfied, electrical performance 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 which possess excellent electrical
and mechanical stability having X and Y thermal
coefficient of expansion (CTE) of 17-25 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.
Mounting Footprint
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
Dimensions are in Inches [Millimeters]
XC1900A-05* Mounting Footprint
4X .066 SQ
[1.68] 4X 50
Transmission
Line
Multiple
plated thru holes
to ground
.220
[5.59]
.430
[10.92]
4X .040
[1.02]
* = Plating Finish
Coupler Mounting Process
The process for assembling this component is a
conventional surface mount process as shown in Figure
1. This process is conducive to both low and high volume
usage.
Figure 1: Surface Mounting Process Steps
Storage of Components: The Xinger II products are
available in either an immersion tin or tin-lead finish.
Commonly used storage procedures used to control
oxidation should be followed for these surface mount
components. The storage temperatures should be held
between 15
O
C and 60
O
C.
Substrate: Depending upon the particular component,
the circuit material has an x and y coefficient of thermal
expansion of between 17 and 25 ppm/°C. This coefficient
minimizes solder joint stresses due to similar expansion
rates of most commonly used board substrates such as
RF35, RO4350, FR4, polyimide and G-10 materials.
Mounting to “hard” substrates (alumina etc.) is possible
depending upon operational temperature requirements.
The solder surfaces of the coupler are all copper plated
with either an immersion tin or tin-lead exterior finish.
Solder Paste: All conventional solder paste formulations
will work well with Anaren’s Xinger II surface mount
components. Solder paste can be applied with stencils or
syringe dispensers. An example of a stenciled solder
paste deposit is shown in Figure 2. As shown in the
figure solder paste is applied to the four RF pads and the
entire ground plane underneath the body of the part.
Coupler Mounting Process
The process for assembling this component is a
conventional surface mount process as shown in Figure
1. This process is conducive to both low and high volume
usage.
Figure 1: Properly Mounted Coupler Prior to R
Storage of Components:
available in either an immersion tin or tin
Commonly used storage procedures used to control
oxidation should be followed for these surface mount
components. The storage temperatures sh
between 15
Substrate:
the circuit material has an x and y coefficient of thermal
expansion of between 9 and 17 ppm/°C. This coefficient
minimizes solder joint stresses due to similar expans
rates of most commonly used board substrates such as
FR4, polyimide and G
substrates (alumina etc.) is possible depending upon
operational temperature requirements. The solder
surfaces of the coupler are all copper plat
an immersion tin or tin
plating tanks have strict process controls and are
monitored monthly for ductility with all percent elongation
numbers registering greater than 16%.
Solder Paste:
will work well with Anaren’s Xinger II surface mount
components. Solder paste can be applied with stencils or
syringe dispensers. An example of a stenciled solder
paste deposit is shown in Figure 2. As shown in the
figure solder pa
entire ground plain underneath the body of the part.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Model XC1900A
-
Rev C
Figure 2: Solder Paste Application
Coupler Positioning: The surface mount coupler can
be placed manually or with automatic pick and place
mechanisms. Couplers should be placed (see Figure 3
and 4) onto wet paste with common surface mount
techniques and parameters. Pick and place systems
must supply adequate vacuum to hold a 0.50-0.55
gram coupler.
Figure 3: Component Placement
Figure 4: Mounting Features Example
Reflow: The surface mount coupler is conducive to most of
today’s conventional reflow methods. A low and high
temperature thermal reflow profile are shown in Figures 5
and 6, respectively. Manual soldering of these components
can be done with conventional surface mount non-contact
hot air soldering tools. Board pre-heating is highly
recommended for these selective hot air soldering
methods. Manual soldering with conventional irons should
be avoided.
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model XC1900A
-
05
Rev C
Figure 5 – Low Temperature Solder Reflow Thermal Profile
Figure 6 – High Temperature Solder Reflow Thermal Profile
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Model XC1900A
-
Rev C
Qualification Flow Chart
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model XC1900A
-
05
Rev C
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Model XC1900A
-
Rev C
Material Declaration XC1900A-05S
Immersion Tin Finish
Material Weight
(lbs) (g) (PPM)
CAS Number
2-thiourea 3.1136E-07 1.4123E-04
2.7687E+02
62-56-6
Acetone
67-64-1
Aluminum
7429-90-5
Arsenic 3.4444E-07 1.5624E-04
3.0629E+02
7440-38-2
Brominated Epoxy Resin
68928-70-1
BT Resin
-------------
Chromium 6.8888E-08 3.1248E-05
6.1258E+01
7440-47-3
Copper 3.5463E-04 1.6086E-01
3.1535E+05
7440-50-8
EDTA Disodium Salt 3.1136E-08 1.4123E-05
2.7687E+01
139-33-3
Fiberglass 4.4280E-05 2.0086E-02
3.9376E+04
65997-17-3
Fused Silica 4.8180E-04 2.1855E-01
4.2844E+05
60676-86-0
Lead
7439-92-1
Polyimide
60842-76-4
Polyphenylene Ether Resin
-------------
PTFE 1.7391E-04 7.8887E-02
1.5465E+05
9002-84-0
Proprietary / Unknown 9.3407E-08 4.2369E-05
8.3062E+01
-------------
Sodium Hypophosphite 9.3407E-08 4.2369E-05
8.3062E+01
7681-53-0
Stannous Chloride 3.7363E-08 1.6948E-05
3.3225E+01
-------------
Steel
7439-89-6
25067-11-2
Tetrafluoroethylene
Hexaflouoropropylene
copolymer
Tin 5.6044E-08 2.5422E-05
4.9837E+01
7440-31-5
Titanium Dioxide 6.8888E-05 3.1248E-02
6.1258E+04
13463-67-7
Xylene
1330-20-7
Total Weight Calculated 1.1245E-03 5.1009E-01
Total Weight Measured 1.1500E-03 5.2164E-01
The v
alues presented above are estimates at the current revision, and it is derived from vendor
supplied data. While Anaren strives for accurate reporting, due to product and process variations at
both Anaren and our suppliers, the quoted values are our best es
timates only, and not measured
absolute values. Product specifications are subject to change without notice.
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model XC1900A
-
05
Rev C
Application Information
The XC1900A-05 is an “X” style 5dB coupler. Port configurations are defined in the table on page 2 of this data sheet
and an example driving port 1 is shown below. Note that this is not an “H” style coupler like the older 5dB Xinger
couplers (such as the 1D1304-5 and 1A1305-5). The change was made to allow better placement of the termination
resistors when the coupler is used in a serial splitter/combiner network.
Ideal Coupler Operation
1
2
1V
0.562V
∠
θ
(
-
5dB)
0.827V
∠
θ
-
90 (
-
1.65dB)
Isolated Port
4
3
The primary application for 5dB couplers is in serial splitting and combining networks. These networks are often
employed when the combining of 3 amplifiers is required. Unlike corporate networks, serial networks are not limited to
binary divisions (corporate networks are limited to 2
n
number of splits, where n is an integer). Serial networks can be
designed with [3, 4, 5, ….., n] splits, but have a practical limitation of about 8 splits.
A 5dB coupler is used in conjunction with a 3dB coupler to build 3-way splitter/combiner networks. An ideal version of
this network is illustrated below. Note what is required; a 50% split (i.e. 3dB coupler) and a 66% and 33% split (which is
actually a 4.77dB coupler, but due to losses in the system higher coupler values, such as 5dB, are actually better suited
for this function). The design of this type of circuit requires special attention to the losses and phase lengths of the
components and the interconnecting lines. A more in depth look at serial networks can be found in the article “Designing
In-Line Divider/Combiner Networks” by Samir Tozin, which describes the circuit design in detail and can be found in the
White Papers Section of the Anaren website, www.anaren.com.
3-Way Ideal Serial Splitter/Combiner Network
1/3 Pin
2/3 Pin
1/3 Pin
1/3 Pin
G=1
G=1
G=1
Pout
2/3 Pin
Pin
1/3 Pin
1/3 Pin
1/3 Pin
5 dB (4.77)
coupler
3 dB coupler
3 dB coupler
5 dB (4.77)
coupler
* 50Ω
Termination
* 50Ω
Termination
* 50Ω
Termination
* 50Ω
Termination
*Recommended Terminations
Power (Watts) Model
8 RFP-060120A15Z50
15 RFP-250375A4Z50
50 RFP-375375A6Z50
100 RFP-500500A6Z50
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Model XC1900A
-
Rev C
Packaging and Ordering Information
Parts are available in both reel and tube. Packaging follows EIA 481-2. Parts are oriented in tape and reel as
shown below. Minimum order quantities are 2000 per reel and 30 per tube. See Model Numbers below for
further ordering information.
B
ØA ØC
REEL DIMENSIONS (inches [mm])
ØA
B
ØC
0.630 [16.0]
4.017 [102.03]
13.0 [330.0]
2000
QUANTITY/REEL
TABLE 1
ØD
0.512 [13.0]
ØD
Xinger
Coupler
Frequency Size Coupling
Value
Plating Finish Packaging
XC 0450= 410-480MHz
0900= 800-1000MHz
1900=1700-2000MHz
2100=2000-2300MHz
A=0.56”x0.35”
B=1.0”x0.5”
E=0.56”x0.2”
L=0.65”x0.48”
T=0.65”x0.48”
03=3dB
05=5dB
10=10dB
20=20dB
P=Tin Lead
S=Immersion Tin
T=Tube
R=Tape & Reel
XX XXXX X-XX X X