Outline Drawing
INTERNET
http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers NORTH AMERICA 800-654-7949 417-335-5935 Fax 417-335-5945 EUROPE 44-1252-832600 Fax 44-1252-837010
Mini-Circuits
Mini-Circuits ISO 9001 & ISO 14001 Certified
Typical Performance Data
Directional Coupler Electrical Specifications
Maximum Ratings
Coaxial Connections
INPUT
3
OUTPUT
2
COUPLED
1
Operating Temperature
-55C to 100C
Storage Temperature
-55C to 100C
Outline Dimensions ( )
inch
mm
ZMDC-30-1
MAINLINE LOSS
0.1
0.2
0.3
0.4
0.5
0
50
100
150
200
250
FREQUENCY (MHz)
MAINLINE
LOSS
(dB)
at RF level of -10 dBm
ZMDC-30-1
COUPLING & DIRECTIVITY
25
29
33
37
41
45
0
50
100
150
200
250
FREQUENCY (MHz)
C
O
U
P
L
I
N
G
&
D
I
R
E
C
T
I
V
I
T
Y
(
d
B
)
COUPLING
DIRECTIVITY
at RF level of -10 dBm
ZMDC-30-1
ZMDC-30-1
RETURN LOSS
10
18
26
34
42
50
0
50
100
150
200
250
FREQUENCY (MHz)
RETURN
LOSS
(dB)
IN
OUT
CPL
at RF level of -10 dBm
electrical schematic
INPUT
OUTPUT
COUPLED
50 0.1 to 250 MHz
Directional Coupler
REV. OR
M93849
ZMDC-30-1
WZ/TD/CP
060803
Coaxial
A
B
C
D
E
F
G
H
1.50
1.13
1.00
.50
.155 2.345
.138
.987
38.10 28.70 25.40 12.70
3.94 59.56
3.51 25.07
J
K
L
M
N
P
S
wt
2.50
.10
.31
.75
1.19
.66
.150 grams
63.50
2.54
7.87 19.05 30.23 16.76
3.81
40.0
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.
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl
Directivity
(dB)
In
Return Loss
(dB)
Out
Cpl
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS
1
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
L
M
U
L
M
U
L
MU
f
L
-f
U
Nom.
Flatness Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min.
Typ.
Max.
Max.
0.1-250
300.5
0.5
0.4
0.6
0.5
0.8
0.55 0.85
23
18
20
15
17
10
1.5
1.0
3.0
Features
excellent insertion loss, 0.5 dB typ.
rugged shielded case
Applications
HF/VHF
amateur radio
instrumentation
CASE STYLE: M21
Connectors Model
Price
Qty.
SMA
ZMDC-30-1
$51.95
(1-9)
BRACKET (OPTION"B")
$5.00
(1+)
BRACKET (OPTION "BR")
$2.50
(1+)
0.10
0.33
30.77
40.14
14.97
14.57
22.19
0.50
0.25
30.66
40.18
28.11
24.39
22.07
0.90
0.24
30.68
40.64
31.51
26.80
22.06
24.00
0.20
30.67
37.39
37.30
29.40
21.95
52.00
0.22
30.68
35.22
31.72
28.95
21.94
89.00
0.24
30.72
33.59
27.65
27.78
21.97
132.00
0.27
30.80
30.45
24.51
26.44
22.01
169.00
0.29
30.87
29.99
22.53
24.92
22.09
214.00
0.32
30.97
28.18
20.61
23.40
22.22
250.00
0.35
31.09
28.60
19.35
22.21
22.35
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