Directional Coupler
75Ω
Maximum Ratings
Operating Temperature
Storage Temperature
Coaxial
ZDC-20-3-75+
ZDC-20-3-75
1 to 150 MHz
-55°C to 100°C
-55°C to 100°C
Features
Permanent damage may occur if any of these limits are exceeded.
• excellent mainline loss, 0.35 dB typ.
• excellent directivity, 25 dB typ.
• rugged shielded case
CASE STYLE: M22
Connectors Model
BNC
ZDC-20-3-75(+)
BRACKET (OPTION"B")
BRACKET (OPTION"BR")
Price
$45.95 ea.
$5.00
$1.50
Qty.
(1-9)
(1+)
(1+)
Coaxial Connections
INPUT
OUTPUT
COUPLED
3
2
1
Applications
• HF/VHF
• instrumentation
• amateur radio
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
Directional Coupler Electrical Specifications
Outline Drawing
FREQ.
RANGE
(MHz)
f
L
-f
U
1-150
COUPLING
(dB)
L
Nom.
19.5±0.5
Flatness
±0.75
MAINLINE LOSS
1
(dB)
M
U
L
DIRECTIVITY
(dB)
M
Min.
20
Typ.
25
Min.
20
Typ.
25
U
Min.
20
VSWR
(:1)
POWER
INPUT
(W)
L
MU
Max.
4.0
Max.
2.0
Typ. Max. Typ. Max. Typ. Max. Typ.
0.35
0.8
0.35
0.8
0.35
0.8
25
Typ.
2.0
L = low range [f
L
to 10 f
L
]
M = mid range [10 f
L
to f
U
/2]
U= upper range [f
U
/2 to f
U
]
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
1.00
1.93
9.94
20.00
46.82
H
1.238
31.45
Mainline Loss
(dB)
In-Out
0.45
0.36
0.30
0.30
0.34
0.36
0.37
0.38
0.39
0.39
ZDC-20-3-75
MAINLINE LOSS
Coupling
(dB)
In-Cpl
19.46
19.46
19.35
19.39
19.37
19.53
19.56
19.51
19.52
19.54
Directivity
(dB)
41.58
47.84
56.88
43.82
35.25
43.57
33.76
31.82
30.86
29.43
In
25.97
29.62
32.94
35.94
34.29
30.78
29.93
28.10
28.08
27.90
Return Loss
(dB)
Out
24.04
26.37
30.18
30.58
29.28
28.04
27.73
26.21
25.47
25.09
Cpl
24.88
27.44
31.33
28.32
22.54
18.80
17.77
14.96
13.35
13.11
Outline Dimensions (
inch
)
mm
A
2.25
57.15
J
3.25
82.55
B
1.38
35.05
K
.10
2.54
C
1.24
31.50
L
.40
10.16
D
.50
12.70
M
1.15
29.21
E
.150
3.81
N
1.86
47.24
F
3.100
78.74
P
.64
16.26
G
.138
3.51
S
wt
.150 grams
3.81
74.0
73.64
85.00
119.45
146.09
150.00
ZDC-20-3-75
COUPLING & DIRECTIVITY
70
COUPLING & DIRECTIVITY
(dB)
60
50
40
30
20
10
0
0
30
60
90
FREQUENCY (MHz)
120
150
at RF level of -10 dBm
0.8
MAINLINE LOSS (dB)
0.6
0.4
0.2
0.0
0
at RF level of -10 dBm
COUPLING
DIRECTIVITY
30
60
90
FREQUENCY (MHz)
120
150
ZDC-20-3-75
RETURN LOSS
60
RETURN LOSS (dB)
50
40
30
20
10
0
0
30
60
90
FREQUENCY (MHz)
120
150
at RF level of -10 dBm
Electrical Schematic
CPL
IN
OUT
Notes
A.
Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B.
Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C.
The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled
to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp
www.minicircuits.com
P.O. Box 35166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
Mini-Circuits
®
REV. B
M119986
ZDC-20-3-75
WZ/TD/CP/AM
131017
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