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 X
3
DC
1
9
P1S
Rev A
b
Doherty Combiner
The X3DC19P1S is a low profile, high performance Doherty Combiner
in a new easy to use, manufacturing friendly surface mount package.
The X3DC19P1S 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 50 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
**
Feature
s:
• 1700 - 2000 MHz
• Low Amp Imbalance
• Low Loss
• Production Friendly
• Tape and Reel
• Lead Free
Frequency Return
Loss
[1]
Insertion
Loss
[1]
Amplitude
Imbalance
[1]
Phase
Imbalance
[1]
Operating
Temp.
MHz dB Min dB Max dB Max Degrees ºC
1700 – 2000 22 0.20 ±0.20 89 ± 4.0 -55 to +95
1805 – 1880 25 0.17 ±0.14 88 ± 4.0 -55 to +95
1930 – 1990 25 0.20 ±0.20 94 ± 4.0 -55 to +95
1880 – 1920 25 0.17 ±0.15 90 ± 4.0 -55 to +95
Return
Loss
[2]
Insertion
Loss
[2]
Port
Extension
[3]
Power
[4]
Θ
ΘΘ
ΘJC
dB Min dB Max Degrees Avg. CW
Watts ºC/Watt
12 0.36 8 50 -
18 0.28 8 50 -
17 0.32 8 50 -
25 0.27 8 50 -
**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 8° at 1930MHz. Details in page 2.
Mechanical Outline
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
X3DC
1
9
P1S
Rev A
Doherty Amplifier Configuration
Doherty Combiner Pin Configuration
The X3DC19P1S 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
Combining Port
Not Used Peak Amp Port 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.
90°
Pin 2
Pin 4
50
Ω
Pin 1
Pin 3
50Ω
35Ω
50Ω
90°
90°
Main Amp
Peak Amp
50Ω
35Ω
90°
RF input
NC
RF output
0°
90°
Offset line
Port Extension
Anaren Doherty
Combiner
50Ω
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 X
3
DC
1
9
P1S
Rev A
Typical Performance (-55°C, 25°C, 95° ): 1700-2000 MHz
1700 1750 1800 1850 1900 1950 2000
-40
-30
-20
-10
0
Frequency (MHz)
R e t u rn L o s s (d B )
Return Loss for X3DC19P1S (Maximum Power Condition)
-55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-40
-30
-20
-10
0
Frequency (MHz)
R e t u rn L o s s (d B )
Return Loss for X3DC19P1S (Low Power Condition)
-55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-0.2
-0.18
-0.16
-0.14
-0.12
-0.1
-0.08
-0.06
-0.04
-0.02
0
Frequency (MHz)
I n s e rt io n L o s s (d B )
Insertion Loss for X3DC19P1S (Maximum Power Condition)
-55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-0.3
-0.25
-0.2
-0.15
-0.1
-0.05
0
Frequency (MHz)
I n s e rt io n L o s s (d B )
Insertion Loss for X3DC19P1S (Low Power Condition)
-55ºC
25ºC
95ºC
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
X3DC
1
9
P1S
Rev A
Typical Performance (-55°C, 25°C, 95°C ): 1700-2000 MHz
1700 1750 1800 1850 1900 1950 2000
-100
-98
-96
-94
-92
-90
-88
-86
-84
-82
-80
Frequency (MHz)
P h a s e B a l a n c e (d e g )
Phase Balance for X3DC19P1S
-55ºC
25ºC
95ºC
1700 1750 1800 1850 1900 1950 2000
-0.25
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0.25
Frequency (MHz)
A m p lit u d e B a la n c e (d e g )
Amplitude Balance for X3DC19P1S
-55ºC
25ºC
95ºC
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 X
3
DC
1
9
P1S
Rev A
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 Mathematical Representation
Return Loss
The impedance match at
the combining port to a
50Ω system.
20log
11
S
Insertion Loss
The combined power
divided by the sum of
input power under the
perfect combining
condition.
10log
(
)
2
14
2
13
SS +
Phase Imbalance
The phase difference
between Peak-Combined
path and Main-Combined
path at
c
ω
= 1930MHz
Phase
(
)
)(
14 c
ω
S
– Phase
(
)
)(
13 c
ω
S
Amplitude Imbalance
The magnitude difference
between Peak-Combined
path and Main-Combined
path.
(
)
2
S20logS20log
1314
−
• 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 Mathematical Representation
Return Loss
The impedance match of
the 50 to100

transformer.
20log
11
S
Insertion Loss The output power divided
by input power. 20log
41
S
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
X3DC
1
9
P1S
Rev A
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.