Directional Coupler
50Ω
Maximum Ratings
Operating Temperature
Storage Temperature
Coaxial
ZDC-20-1+
ZDC-20-1
25 to 400 MHz
-55°C to 100°C
-55°C to 100°C
Features
Permanent damage may occur if any of these limits are exceeded.
Coaxial Connections
INPUT
OUTPUT
COUPLED
• excellent directivity, 35 dB typ.
• excellent mainline loss, 0.3 dB typ.
• high input power, up to 5W max.
• rugged shielded case
CASE STYLE: M22
Connectors Model
BNC
ZDC-20-1(+)
BRACKET (OPTION"B")
BRACKET (OPTION"BR")
Price
$51.95 ea.
$5.00
$1.50
Qty.
(1-9)
(1+)
(1+)
3
2
1
Applications
• VHF/HF
• instrumentation
• communication receivers & transmitters
• 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
25-400
COUPLING
(dB)
L
Nom.
20±0.5
Flatness
±0.5
MAINLINE LOSS
1
(dB)
M
U
L
DIRECTIVITY
(dB)
M
Min.
20
Typ.
35
Min.
25
Typ.
25
U
Min.
20
VSWR
(:1)
POWER
INPUT
(W)
L
MU
Max.
5.0
Max.
3.0
Typ. Max. Typ. Max. Typ. Max. Typ.
0.2
0.25
0.3
0.35
0.35
0.5
25
Typ.
1.25
L = 25-50 MHz M = 50-300 MHz
U= 300-400 MHz
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
25.00
45.00
80.00
120.00
160.00
210.00
260.00
310.00
360.00
400.00
Mainline Loss
(dB)
In-Out
0.13
0.14
0.14
0.14
0.14
0.15
0.15
0.10
0.15
0.21
ZDC-20-1
MAINLINE LOSS
Coupling
(dB)
In-Cpl
19.97
19.98
19.98
20.01
20.02
20.08
20.13
20.15
20.23
20.28
Directivity
(dB)
35.76
35.38
34.30
33.33
32.39
30.90
29.21
27.48
25.48
24.37
In
34.28
33.99
33.78
34.16
33.90
34.23
33.58
32.70
31.39
29.89
Return Loss
(dB)
Out
33.88
31.38
27.78
24.90
22.55
20.48
18.79
17.46
16.45
15.74
Cpl
39.90
38.66
36.78
35.11
33.12
31.35
29.50
28.08
26.85
26.00
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
H
1.238
31.45
S
wt
.150 grams
3.81
74.0
ZDC-20-1
COUPLING & DIRECTIVITY
70
COUPLING & DIRECTIVITY
(dB)
60
50
40
30
20
10
0
25
100
175
250
FREQUENCY (MHz)
325
400
at RF level of -10 dBm
0.4
MAINLINE LOSS (dB)
0.3
0.2
0.1
0.0
at RF level of -10 dBm
COUPLING
DIRECTIVITY
25
100
175
250
FREQUENCY (MHz)
325
400
ZDC-20-1
RETURN LOSS
50
RETURN LOSS (dB)
42
34
26
18
10
25
100
175
250
FREQUENCY (MHz)
325
400
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
M137477
ZDC-20-1
WZ/TD/CP/AM
131017
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