Directional Coupler
75Ω
2 to 250 MHz
Features
-40°C to 85°C
-55°C to 100°C
Surface Mount
JDC-20-3-75+
JDC-20-3-75
Maximum Ratings
Operating Temperature
Storage Temperature
• low mainline loss, 0.3 dB typ.
• high directivity, 30 dB typ.
• excellent solderability
CASE STYLE: BH292
PRICE: $ 13.60 ea. QTY (25-49)
Pin Connections
INPUT
OUTPUT
COUPLED
GROUND
ISOLATE (DO NOT USE)
1
6
3
2,5
4
Applications
• communications
• level detecting
• signal sampling
• reflective power measurements
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
Directional Coupler Electrical Specifications
FREQ.
(MHz)
COUPLING
(dB)
L
f
L
-f
U
2-250
Nom.
19.2±0.5
Flatness
±0.5
Typ.
0.4
Max.
0.8
Typ.
0.3
Outline Drawing
MAINLINE LOSS
1
(dB)
M
Max.
0.7
Typ.
0.4
U
Max.
0.7
Typ.
24
L
Min.
16
DIRECTIVITY
(dB)
M
Typ.
30
Min.
20
Typ.
20
U
Min.
15
VSWR POWER
(:1) INPUT, W
L
Typ.
1.1
MU
Max. Max.
0.5
1.0
PCB Land Pattern
L = 2-20 MHz
M = 20-125 MHz
U = 125-250 MHz
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Suggested Layout,
Tolerance to be within
±.002
Mainline Loss
(dB)
In-Out
0.44
0.30
0.28
0.28
0.30
0.32
0.35
0.37
0.40
0.46
JDC-20-3-75
MAINLINE LOSS
Coupling
(dB)
In-Cpl
19.22
19.23
19.24
19.24
19.26
19.28
19.32
19.35
19.38
19.45
Directivity
(dB)
In
23.55
28.64
29.97
30.50
31.34
31.42
30.66
29.92
28.50
25.22
Return Loss
(dB)
Out
24.40
31.07
33.28
34.28
33.32
30.68
28.22
26.97
25.21
21.84
Cpl
23.02
28.66
30.26
30.94
32.19
33.55
35.94
37.80
41.60
37.78
1.00
4.00
7.00
10.00
50.00
90.00
130.00
150.00
180.00
250.00
23.26
29.11
30.46
31.30
30.27
27.59
25.09
23.75
22.06
18.52
Outline Dimensions (
inch
)
mm
A
.280
7.11
H
.047
1.19
B
.310
7.87
J
.065
1.65
C
--
--
K
.065
1.65
D
.100
2.54
L
.300
7.62
E
.225
5.72
F
.055
1.40
G
.100
2.54
wt
grams
0.45
MAINLINE LOSS (dB)
JDC-20-3-75
COUPLING & DIRECTIVITY
60
COUPLING &
DIRECTIVITY (dB)
50
40
30
20
10
0
0
50
100
150
FREQUENCY (MHz)
200
250
at RF level of -10 dBm
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
at RF level of -10 dBm
COUPLING
DIRECTIVITY
Demo Board MCL P/N: TB-33
Suggested PCB Layout (PL-044)
50
100
150
FREQUENCY (MHz)
200
250
JDC-20-3-75
RETURN LOSS
60
RETURN LOSS (dB)
50
40
30
20
10
0
0
50
100
150
FREQUENCY (MHz)
200
250
at RF level of -10 dBm
Electrical Schematic
CPL
IN
OUT
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TM
®
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IF/RF MICROWAVE COMPONENTS
REV. C
M119986
ED-5581
JDC-20-3-75
WZ/TD/CP/AM
081111
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