Directional Coupler
75Ω
Maximum Ratings
Operating Temperature
Storage Temperature
Coaxial
ZDC-20-3-75
1 to 150 MHz
-55°C to 100°C
-55°C to 100°C
Features
• excellent insertion 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
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
DIRECTIVITY
(dB)
U
L
Min.
20
Typ.
25
M
Min.
20
Typ.
25
U
Min.
20
VSWR
(:1)
POWER
INPUT
(W)
L
MU
Max.
4.0
Max.
2.0
M
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
73.64
85.00
119.45
146.09
150.00
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
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
H
1.238
31.45
S
wt
.150 grams
3.81
74.0
ZDC-20-3-75
MAINLINE LOSS
0.8
MAINLINE LOSS (dB)
0.6
0.4
0.2
0.0
0
30
60
90
FREQUENCY (MHz)
120
150
at RF level of -10 dBm
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
COUPLING
DIRECTIVITY
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
INPUT
OUTPUT
COUPLED
Distribution Centers
NORTH AMERICA 800-654-7949 • 417-335-5935 • Fax 417-335-5945 • EUROPE 44-1252-832600 • Fax 44-1252-837010
Mini-Circuits
®
INTERNET
http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
REV. OR
M93849
ZDC-20-3-75
WZ/TD/CP
060801
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ISO 9001 & ISO 14001
Certified
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