X3DC08E2 Datasheet_RevB
Model X3DC08E2S
RevB
Doherty Combiner
b
Description
The X3DC08E2S is a low profile, high performance Doherty Combiner
in a new easy to use, manufacturing friendly surface mount package.
The X3DC08E2S is designed particularly for Doherty Amplifier
applications, where tightly controlled phase and amplitude imbalance as
well as low insertion loss are required for maximum and low power
condition. 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. Produced with 6 of 6 RoHS compliant tin
immersion finish
Electrical Specifications **
Features:
• 862 - 894 MHz
• High Power
• Low Amp Imbalance
• Very Low Loss
• Production Friendly
• Tape and Reel
• Lead Free
Phase
Operating
Imbalance
Temp.
[1]
Frequency
Return
[1]
Loss
Insertion
[1]
Loss
Amplitude
[1]
Imbalance
MHz
dB Min
dB Max
dB Max
Degrees
ºC
862 – 894
20
0.15
±0.12
90 ± 3.0
-55 to +95
Return
[2]
Loss
Insertion
[2]
Loss
Port
[3]
Extension
Power
ΘJC
dB Min
dB Max
Degrees
Avg. CW
Watts
ºC/Watt
20
0.25
3
200
18
**Specification based on performance of unit properly installed on Anaren Test Board
[1] At maximum power condition, Doherty combiner functions as an equal-split power combiner.
[2] At low power condition, Doherty combiner functions as a 100Ω to 50Ω impedance transformer.
[3] There are short 50 ohm lines associated with input ports of 3° at 881MHz. Details in page 2.
Mechanical Outline
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 X3DC08E2S
RevB
Doherty Amplifier Configuration
Offset line
0°
RF input
RF output
Main Amp
90°
50Ω
90°
35Ω
NC
90°
Peak Amp
Anaren Doherty
Combiner
Port Extension
50Ω
Doherty Combiner Pin Configuration
The X3DC08E2S 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 4
50Ω
90°
50Ω
90°
Pin 3
Pin 2
35Ω
50Ω
Pin 1
Combining Port
Pin 2
Not Used
Pin 3
Peak Amp Port
Pin 4
Main Amp Port
There are inevitably short lines associating with input ports in some high frequency band parts. The length of the
short line is specified as electrical length at center frequency and noted as port extension in this datasheet. The
designer should take this length into the consideration to optimize the offset line length.
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 X3DC08E2S
RevB
Insertion Loss and Power Derating Curves
Insertion Loss Derating:
Power Derating:
The insertion loss, at a given frequency, of a group of
Xinger parts 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 85°C and 150°C. A best-fit line
for the measured data is computed and then plotted
from -55°C to 150°C.
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.
If mounting temperature is greater than 95°C, Xinger
coupler will perform reliably as long as the input power
is derated to the curve above.
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 X3DC08E2S
RevB
Typical Performance (-55°C, 25°C, 95°C ): 862-894 MHz
Return Loss for X3DC08E2S (Low Power Condition)
Return Loss for X3DC08E2S (Maximum Power Condition)
0
0
-55ºC
25ºC
95ºC
-10
R e tu rn L o s s (d B )
R e t u rn L o s s (d B )
-10
-20
-30
-40
-50
860
-55ºC
25ºC
95ºC
-20
-30
-40
865
870
875
880
Frequency (MHz)
885
890
-50
860
895
Insertion Loss for X3DC08E2S (Maximum Power Condition)
865
870
875
880
Frequency (MHz)
885
890
895
Insertion Loss for X3DC08E2S (Low Power Condition)
0
0
-55ºC
25ºC
95ºC
-0.02
-55ºC
25ºC
95ºC
-0.05
In s e rt io n L o s s (d B )
In s e rtio n L o s s (d B )
-0.04
-0.06
-0.08
-0.1
-0.1
-0.15
-0.2
-0.12
-0.25
-0.14
-0.16
860
865
USA/Canada:
Toll Free:
Europe:
870
875
880
Frequency (MHz)
885
(315) 432-8909
(800) 411-6596
+44 2392-232392
890
895
Available on Tape and
Reel for Pick and Place
Manufacturing.
-0.3
860
865
870
875
880
Frequency (MHz)
885
890
895
Model X3DC08E2S
RevB
Typical Performance (-55°C, 25°C, 95°C): 862-894 MHz
Phase Balance for X3DC08E2S
Amplitude Balance for X3DC08E2S
0.2
-55ºC
25ºC
95ºC
-86
-55ºC
25ºC
95ºC
0.15
0.1
A m p lit u d e B a la n c e (d e g )
P h a s e B a la n c e (d e g )
-88
-90
-92
0.05
0
-0.05
-0.1
-0.15
-94
860
865
870
875
880
Frequency (MHz)
885
890
895
-0.2
860
865
Available on Tape
and Reel for Pick and
Place Manufacturing.
870
875
880
Frequency (MHz)
USA/Canada:
Toll Free:
Europe:
885
890
895
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model X3DC08E2S
RevB
Definition of the Specifications
To guarantee the part performance in Doherty architecture, the part is specified in Doherty operation for maximum
power condition and low power condition. The following specification definition assumes the extra port extension is
deembeded from the raw S parameter and the parts is measured with Pin n connected to Port n (where n=1, 2, 3, 4).
•
Maximum power condition
Under the maximum power condition, the symmetrical Doherty architecture requires main amplifier and peak amplifier to
work at full capacity with the optimum termination (50 Ω). The two amplifiers should deliver RF power of equal
magnitude and 90 degree phase difference. Doherty combiner functions as a coherent power combiner and supplies the
90 degree phase compensation. The following specification is defined with 50 Ω port impedance at three ports for this
condition.
Parameter
Definition
Return Loss
The impedance match at
the combining port to a
50Ω system.
Insertion Loss
Phase Imbalance
Amplitude Imbalance
•
The combined power
divided by the sum of
input power under the
perfect combining
condition.
The phase difference
between Peak-Combined
path and Main-Combined
path at ωc = 881MHz
The magnitude difference
between Peak-Combined
path and Main-Combined
path.
Mathematical Representation
S11
20log
(S
10log
Phase
2
13
2
+ S14
)
(S14 (ωc )) – Phase (S13 (ωc ))
(20log S
14
− 20log S13 )
2
Low power condition
Under low power condition, the Doherty operation turns off peak amplifier and requires main amplifier to be terminated
with double of the optimum impedance (100 Ω). With the peak port open, Doherty combiner servers as an impedance
transformer transforming 50 Ω at combining port to 100 Ω at main amplifier port. The following specification is defined
under the port impedance condition of Port 1 (Combining Port) 50 Ω, Port 4 (Main Amp Port) 100 Ω and Port 3 (Peak Amp
Port) open.
Parameter
Definition
Return Loss
The impedance match of
the 50 to100 Ω
transformer.
20log
S11
Insertion Loss
The output power divided
by input power.
20log
S 41
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Mathematical Representation
Model X3DC08E2S
RevB
Packaging and Ordering Information
Parts are available in reel. Packaging follows EIA 481-2. Parts are oriented in tape and reel as shown below.
Minimum order quantities are 2000 per reel.
.079
[2.00]
.012
[0.30]
Ø.059
[Ø1.50]
.157
[4.00]
.069
[1.75]
.453
[11.50]
.591
[15.00]
Ø.059
[Ø1.50]
.228
[5.80]
.315
[8.00]
XX XX
.094
[2.40]
.945
[24.00]
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Anaren:
X3DC08E2S
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