DB0805 3dB 90° Couplers Datasheet

Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
GENERAL DESCRIPTION
ITF TECHNOLOGY
The ITF SMD 3dB 90° Coupler is based on thin-film multilayer
technology. The technology provides a miniature part with excellent
high frequency performance and rugged construction for reliable
automatic assembly.
The ITF 3dB 90° Coupler is offered in a variety of frequency bands
compatible with various types of high frequency wireless
systems.
Recommended Pad Layout Dimensions
2.24 (0.088)
0.70
(0.028)
mm (inches)
APPLICATIONS
FEATURES
• Balanced Amplifiers and
Signal Distribution in
Mobile Communications
•
•
•
•
DIMENSIONS:
Bottom View
millimeters (inches)
2.03±0.10
(0.080±0.004)
1.55±0.10
(0.061±0.004)
0.98±0.15
(0.037±0.006)
0.56±0.25
(0.022±0.010)
0.35±0.15
(0.014±0.006)
L
W
T
GROUND
Miniature 0805 size
Low I. Loss
High Isolation
Power Handling:
10W RF CW
• Surface Mountable
• Supplied on Tape and
Reel
• Operating Temperature
1.76
0.64 (0.069)
(0.025)
A
B
B
L
W
T
3
A
TERMINALS (Top View)
Orientation in Tape
0.15 (0.006) TYP.
50
OHM
IN
OUT1
50
OHM
OUT2
IN
OUT1
Code Letter
Marking
OUT2
ELECTRICAL PARAMETERS*
Part Number**
DB0805A0880ASTR
DB0805A0915ASTR
DB0805A0967ASTR
DB0805A1350ASTR
DB0805A1650ASTR
DB0805A1800ASTR
DB0805A1850ASTR
DB0805A1900ASTR
DB0805A1950ASTR
DB0805A2140ASTR
DB0805A2325ASTR
Frequency FO
[MHz]
880±30
915±30
967±30
1350±50
1650±50
1800±50
1850±50
1900±50
1950±50
2140±50
2325±50
I. Loss @ FO
[dB]
0.35
0.35
0.35
0.35
0.35
0.30
0.30
0.30
0.25
0.25
0.25
Phase Balance Code Letter
[deg] max.
Marking
3
Y
3
V
3
V
3
C
3
F
3
F
3
K
3
K
3
K
3
L
3
T
**LEAD FREE TERMINATION
PART NUMBERS:
DB0805AxxxxASTR
LEAD-FREE COMPATIBLE
COMPONENT
*With Recommended Pad Layout
NOTE: Additional Frequencies Available Upon Request
87
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
880 ± 30MHz DB0805A0880ASTR
-3.0
I. Loss 1
dB
-3.2
-3.4
I. Loss 2
-3.6
3
-3.8
850
865
880
895
910
Frequency (MHz)
-10
-12
-14
-16
R. Loss
dB
-18
-20
Isolation
-22
-24
-26
-28
-30
850
855
880
Frequency (MHz)
88
905
930
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
915 ± 30MHz DB0805A0915ASTR
-2.8
-3.0
-3.2
dB
I. Loss 1
-3.4
I. Loss 2
3
-3.6
-3.8
885
900
915
930
945
Frequency (MHz)
-10
-12
-14
-16
dB
-18
-20
Isolation
R. Loss
-22
-24
-26
-28
-30
865
890
915
940
965
Frequency (MHz)
89
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
967± 30MHz DB0805A0967ASTR
-2.8
-3.0
-3.2
dB
I. Loss 1
-3.4
I. Loss 2
-3.6
3
-3.8
937
952
967
982
997
Frequency (MHz)
-10
-12
-14
-16
dB
-18
-20
-22
R. Loss
Isolation
-24
-26
-28
-30
917
942
967
Frequency (MHz)
90
992
1017
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1350 ± 50MHz DB0805A1350ASTR
-3.0
-3.2
dB
I. Loss 1
-3.4
I. Loss 2
-3.6
3
-3.8
1300
1350
1400
Frequency (MHz)
-10
-12
-14
-16
Isolation
dB
-18
-20
R. Loss
-22
-24
-26
-28
-30
1300
1350
1400
Frequency (MHz)
91
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1650 ± 50MHz DB0805A1650ASTR
-2.8
-3.0
dB
I. Loss 1
-3.2
-3.4
I. Loss 2
3
-3.6
1550
1600
1650
1700
1750
1700
1750
Frequency (MHz)
-10
-12
-14
-16
dB
-18
Isolation
R. Loss
-20
-22
-24
-26
-28
-30
1550
1600
1650
Frequency (MHz)
92
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1800 ± 50MHz DB0805A1800ASTR
-2.8
-3.0
dB
I. Loss 1
-3.2
I. Loss 2
-3.4
3
-3.6
1750
1775
1800
1825
1850
Frequency (MHz)
-10
-12
-14
-16
dB
-18
-20
-22
Isolation
R. Loss
-24
-26
-28
-30
1750
1775
1800
1825
1850
Frequency (MHz)
93
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1850 ± 50MHz DB0805A1850ASTR
-2.8
-3.0
dB
I. Loss 1
-3.2
I. Loss 2
-3.4
3
-3.6
1800
1825
1850
1875
1900
Frequency (MHz)
-10
-12
-14
-16
dB
-18
R. Loss
Isolation
-20
-22
-24
-26
-28
-30
1800
1825
1850
Frequency (MHz)
94
1875
1900
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1900 ± 50MHz DB0805A1900ASTR
-3.0
I. Loss 1
dB
-3.2
I. Loss 2
-3.4
3
-3.6
1850
1875
1900
1925
1950
Frequency (MHz)
-10
-12
-14
-16
dB
-18
-20
Isolation
R. Loss
-22
-24
-26
-28
-30
1850
1875
1900
1925
1950
Frequency (MHz)
95
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
1950 ± 50MHz DB0805A1950ASTR
-2.8
-3.0
dB
I. Loss 1
-3.2
I. Loss 2
-3.4
3
-3.6
1900
1925
1950
1975
2000
Frequency (MHz)
-10
-12
-14
-16
dB
-18
R. Loss
-20
Isolation
-22
-24
-26
-28
-30
1900
1925
1950
Frequency (MHz)
96
1975
2000
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
2140 ± 50MHz DB0805A2140ASTR
-2.6
-2.8
dB
-3.0
I. Loss 1
-3.2
I. Loss 2
-3.4
-3.6
3
-3.8
2040
2090
2140
2190
2240
Frequency (MHz)
-10
-12
-14
-16
dB
-18
R. Loss
-20
-22
Isolation
-24
-26
-28
-30
2140
2090
2140
2190
2240
Frequency (MHz)
97
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
2325 ± 50MHz DB0805A2325ASTR
-3.0
-3.1
I. Loss 1
dB
-3.2
-3.3
I. Loss 2
-3.4
3
-3.5
2275
2300
2325
2350
2375
Frequency (MHz)
-10
-12
-14
-16
R. Loss
dB
-18
Isolation
-20
-22
-24
-26
-28
-30
2275
2300
2325
Frequency (MHz)
98
2350
2375
Thin-Film Directional Couplers
DB0805 3dB 90° Test Jigs
GENERAL DESCRIPTION
These jigs are designed for testing the DB0805 3dB 90°
Couplers using a Vector Network Analyzer.
They consist of a dielectric substrate, having 50Ω microstrips
as conducting lines and a bottom ground plane located at a
distance of 0.254mm from the microstrips.
The substrate used is Neltec’s NH9338ST0254C1BC.
The connectors are SMA type (female), ‘Johnson Components
Inc.’ Product P/N: 142-0701-841.
Both a measurement jig and a calibration jig are provided.
The calibration jig is designed for a full 2-port calibration, and
consists of an open line, short line and through line. LOAD
calibration can be done by a 50Ω SMA termination.
MEASUREMENT PROCEDURE
When measuring a component, it can be either soldered or
pressed using a non-metallic stick until all four ports touch
the appropriate pads. Set the VNA to the relevant frequency
band. Connect the VNA using a 10dB attenuator on the jig
terminal connected to port 2. Follow the VNA’s instruction
manual and use the calibration jig to perform a full 2-port
calibration in the required bandwidths.
Place the coupler on the measurement jig as follows:
Input (Coupler)
50Ω (Coupler)
➜ Connector 1 (Jig)
➜ Connector 2 (Jig)
3
Output 1 (Coupler) ➜ Connector 3 (Jig)
Output 2 (Coupler) ➜ Connector 4 (Jig)
To measure R. Loss and I. Loss 1 connect:
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ Port 2 (VNA)
Connector 2 (Jig) ➜ 50Ω
Connector 4 (Jig) ➜ 50Ω
To measure R. Loss and I. Loss 2 connect:
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ 50Ω
Connector 2 (Jig) ➜ 50Ω
Connector 4 (Jig) ➜ Port 2 (VNA)
To measure Isolation connect:
Connector 1 (Jig) ➜ 50Ω
Connector 2 (Jig) ➜ 50Ω
Connector 3 (Jig) ➜ Port 1 (VNA)
Connector 4 (Jig) ➜ Port 2 (VNA)
Calibration Jig
Measurement Jig
Connector 1
Load &
Through
Connector
Johnson
P/N 142-0701-841
Connector 2
Load &
Through
Connector 4
Connector 3
Short Line
to GND
Open
Line
99