TTM-Technologies–Inc–X4C35K1-05SR
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X4C35K1-05S
Rev A
Uneven Split Quadrature Coupler
5dB, 90°
Description:
The X4C35K1-05S is a low profile, high performance uneven split
quadrature 5dB coupler, with a power rating of 10 Watts (AVG) and
a peak to average ratio of 12 dB; in a new easy to use, Xinger style
manufacturing friendly surface mount package. The X4C35K1-05S
is designed particularly for the LTE and 5G applications in all end
markets including telecom and Mil-Aero. The X4C35K1-05S is
particularly used as power splitting and combining, where tightly
controlled coupling and low insertion loss is required.
Parts have been subjected to rigorous Xinger 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, RO4003 and polyimide. Produced with 6 of 6
RoHS compliant tin immersion finish.
Features:
3100-4200 MHz
Electrical Specifications*:
Insertion
Loss
Frequency
Coupling
Return Loss
Doherty Amplifier Splitter
Power 10W (AVG)
LTE and 5G, C Band
Very Low Loss (< 0.20dB)
Tight Coupling (+ 0.35dB)
Tight Phase Balance (+ 4
o
)
High Isolation (19 dB)
Production Friendly
Tape and Reel
MHz
dB Min
dB Max
dB Min
3100-4200
5±0.35
0.25
0.20
19
3300-3800
5±0.40
19
Operating
Temp.
Isolation
Power
Phase
Degrees
90±4.0
90±4.0
Avg. Watts
@ 105°C
dB Max
ºC
Lead-Free
19
10
-55 to +150
-55 to +150
19
10
*Specification based on performance of unit properly installed on TTM Technologies Test Board
with small signal applied. Specifications subject to change without notice. Refer to parameter
definitions for details.
Outline Drawing:
1
X4C35K1-05S
Rev A
Uneven Split Quadrature Coupler Pin Configuration:
The
X4C35K1-05S
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:
Configuration
Splitter
Pin 1
Input
Pin 2
Isolated
Pin 3
Pin 4
-2dB
< Θ
-90
-5dB
< Θ
Input
-5dB
< Θ
Splitter
Splitter
Splitter
Isolated
Input
-2dB
< Θ
-90
Isolated
-2dB
< Θ
-90
-5dB
< Θ
-5dB
< Θ
-2dB
< Θ
-90
Isolated
Input
∠
θ
*Notes: The actual phase,
, or amplitude at a given frequency for all ports, can be seen in our de-embedded S-parameters, which can
Directional Couplers 2dB to 6dB | TTM Technologies
be downloaded here:
Peak Power Handling
High-Pot testing of these couplers during the qualification procedure resulted in a minimum breakdown voltage
of 1.18Kv (minimum recorded value). This voltage level corresponds to a breakdown resistance capable of
handling at least 12dB peak 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).
2
X4C35K1-05S
Rev A
Insertion Loss and Power Derating Curves
Insertion Loss Derating:
Power Derating:
The insertion loss, at a given frequency, of a group of
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.
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 -55
C, 105
C and 150
C.
A best-fit line for the measured data is computed and
then plotted from -55
C to 150
C.
As the mounting interface temperature approaches
the maximum continuous operating temperature,
the power handling decreases to zero.
If mounting temperature is greater than 105°C, the
Xinger coupler will perform reliably as long as the
input power is derated to the curve above.
3
X4C35K1-05S
Rev A
Typical Performance: (-55°C, 25°C, 105°C, 150°C): 3100 to 4200 MHz
4
X4C35K1-05S
Rev A
Definition of Measured Specifications
Parameter
Definition
Mathematical Representation
푉
푚푎푥
The impedance match
of the coupler to a 50
system. A VSWR of 1:1
is optimal.
푉푆푊푅 =
VSWR
(Voltage Standing Wave
Ratio)
푉
푚푖푛
Vmax = voltage maxima of a standing wave
Vmin = voltage minima of a standing wave
The impedance match
of the coupler to a 50
system. Return
Loss is
an alternate means to
express VSWR.
푉푆푊푅 + 1
Return Loss
(
)
푅푒푡푢푟ꢀ 퐿표푠푠
푑퐵 =
20푙표푔
푉푆푊푅 − 1
The input power divided
by the sum of the power
at the two output ports.
The input power divided
by the power at the
푃
푖푛
(
)
퐼ꢀ푠푒푟푡ꢁ표ꢀ 퐿표푠푠
푑퐵 =
10푙표푔
Insertion Loss
Isolation
푃
+
푃
ꢃ푖ꢄꢅ푐ꢆ
푐푝ꢂ
푃
푖푛
(
)
퐼푠표푙ꢇ푡ꢁ표ꢀ 푑퐵
= 10푙표푔
푃
푖ꢈꢉ
isolated port.
The difference in phase
angle between the two
output ports.
Phase Balance
Phase at coupled port
–
Phase at direct port
The power at each
output divided by the
average power of the
two outputs.
P
P
cpꢊ
direct
and
10log
(P ꢋP
10log
Amplitude Balance
⁄
) ꢌ
⁄
) ꢌ
(P ꢋP
cpꢊ
direct
cpꢊ
direct
Group delay is average
of
group delay’s from
input port to the coupled
port
Group Delay
Average ( GD-C)
5
X4C35K1-05S
Rev A
Packaging and Ordering Information
Parts are available in a reel. Packaging follows EIA 481 for reels.
Parts are oriented in tape and reel as shown
below. Minimum
order quantities are 500 and 8000 pcs per reel.
Dimensions are in inches [mm]
Contact us:
rf&s_support@ttm.com
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