Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 3/99A
Directional Coupler 0.810.96 GHz
Features
s
Low Cost
s
Low Profile
s
Small SOT-6 Package
s
Tape & Reel
DC08-73
Description
The DC08-73 is a monolithic directional coupler tailored
to the 0.810.96 GHz band. It offers low loss, good
isolation, good input/output matching and exceptional
coupling repeatability. It may be used at higher
frequencies when stronger coupling is required. It is
available in the SOT-6 leaded surface mount package.
Parameter
Min.
Typ.
Max.
Unit
Frequency
0.81
0.96
GHz
Insertion Loss
1
.35
.45
dB
Isolation
21
22
dB
Input VSWR
1.05:1
1.3:1
Output VSWR
1.05:1
1.3:1
Coupling
14
15
16
dB
Coupled Port VSWR
1.2:1
1.3:1
Electrical Specifications at 25C
12
3
65
4
GND
GND
COUPLED
OUT
GND
RF IN
DC08
Pin Out
1
2
3
6
5
4
Block Diagram
1. Coupling loss included.
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
2
Specifications subject to change without notice. 3/99A
Directional Coupler 0.810.96 GHz
DC08-73
Frequency (GHz)
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
I
n
s
e
r
t
i
o
n
L
o
s
s
(
d
B
)
Insertion Loss vs. Frequency
Frequency (GHz)
-40.0
-30.0
-20.0
-10.0
0.0
I
s
o
l
a
t
i
o
n
(
d
B
)
Isolation vs. Frequency
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Frequency (GHz)
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
1.0
1.1
1.2
1.3
1.4
1.5
O
u
t
p
u
t
V
S
W
R
Output VSWR vs. Frequency
Frequency (GHz)
1.0
1.1
1.2
1.3
1.4
1.5
C
o
u
p
l
e
d
P
o
r
t
V
S
W
R
Coupled Port VSWR vs. Frequency
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Frequency (GHz)
1.0
1.1
1.2
1.3
1.4
1.5
I
n
p
u
t
V
S
W
R
Input VSWR vs. Frequency
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Frequency (GHz)
-30.0
-25.0
-20.0
-15.0
-10.0
-5.0
C
o
u
p
l
i
n
g
(
d
B
)
Coupling vs. Frequency
0.3 0.6 0.9 1.2
1.5 1.8 2.1 2.4
2.7 3.0
Typical Performance Data
Directional Coupler 0.810.96 GHz
DC08-73
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
3
Specifications subject to change without notice. 3/99A
Characteristic
Value
Input Power
+4 W
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Electrostatic Discharge
+125 V
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
Recommended Board Layout
0.075
0.020
0.018 TYP.
0.015
0.039 TYP.
0.0200 DIA.
VIA 3 PLACES
SOT-6
0.074
(1.90 mm REF.)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.037 (0.95 mm) REF.
0.122 (3.10 mm)
0.106 (2.70 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
PIN 1
PIN 1
INDICATOR
0.022 (0.61 mm)
0.004 (0.10 mm)
0.014
(0.26 mm)
0.004
(0.10 mm)
0.012
(0.30 mm)
TYP.
5.0 1
5.0 1
Material is 10 mil FR4.
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