Coaxial
ZDC-20-3-75-1+
ZDC-20-3-75-1
Directional Coupler
75Ω
55 to 90 MHz
Features
Maximum Ratings
Operating Temperature
-55°C to 100°C
-55°C to 100°C
• excellent directivity, 35 dB typ.
• excellent mainline loss, 0.4 dB typ.
• rugged shielded case
CASE STYLE: M22
Storage Temperature
Permanent damage may occur if any of these limits are exceeded.
Connectors Model
Price
Qty.
BNC
ZDC-20-3-75-1
$52.95 ea. (1-9)
BRACKET (OPTION"B")
BRACKET (OPTION"BR")
$5.00
$1.50
(1+)
(1+)
Coaxial Connections
Applications
• VHF
• instrumentation
• amateur radio
INPUT
3
2
1
OUTPUT
COUPLED
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
Directional Coupler Electrical Specifications
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
Outline Drawing
fL-fU
Nom.
18.6±0.5
Flatness
±0.3
Typ. Max.
Typ. Min.
Typ.
1.2
Max.
4.0
55-90
0.4
0.6
35
30
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Mainline Loss
(dB)
Coupling
(dB)
In-Cpl
Directivity
(dB)
Return Loss
(dB)
In-Out
In
Out
Cpl
55.00
59.00
63.00
67.00
71.00
0.46
0.47
0.47
0.48
0.48
18.61
18.63
18.63
18.65
18.65
34.58
33.86
33.36
32.92
32.39
25.04
24.76
24.50
24.23
23.98
26.15
25.84
25.57
25.28
25.01
19.84
19.26
18.71
18.17
17.67
inch
Outline Dimensions (
)
mm
A
2.25
B
1.38
C
1.24
D
.50
E
F
G
H
76.00
81.00
85.50
88.00
90.00
0.48
0.48
0.49
0.48
0.49
18.67
18.67
18.69
18.70
18.70
31.99
31.23
30.52
30.40
30.28
23.67
23.37
23.10
22.96
22.85
24.68
24.39
24.10
23.96
23.82
17.08
16.56
16.12
15.88
15.70
.150 3.100
3.81 78.74
.138 1.238
3.51 31.45
57.15 35.05 31.50 12.70
J
3.25
82.55
K
.10
L
.40
M
1.15
N
1.86
P
.64
S
wt
.150 grams
3.81 74.0
2.54 10.16 29.21 47.24 16.26
ZDC-20-3-75-1
MAINLINE LOSS
ZDC-20-3-75-1
COUPLING & DIRECTIVITY
at RF level of -10 dBm
at RF level of -10 dBm
1.0
0.8
0.6
0.4
0.2
0.0
50
40
30
20
10
0
COUPLING
DIRECTIVITY
55
62
69
76
83
90
55
62
69
76
83
90
FREQUENCY (MHz)
FREQUENCY (MHz)
ZDC-20-3-75-1
RETURN LOSS
Electrical Schematic
at RF level of -10 dBm
40
34
28
22
16
10
IN
OUT
CPL
55
62
69
76
83
90
FREQUENCY (MHz)
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
REV. B
M119986
ZDC-20-3-75-1
WZ/TD/CP/AM
131017
®
Mini-Circuits
www.minicircuits.com P.O. Box 35166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
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