FREQ.
(MHz)
COUPLING
(dB)
MAINLINE LOSS
1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT, W
Nom. Flatness
L
Typ. Max.
M
Typ. Max.
U
Typ. Max.
L
Typ. Min.
M
Typ. Min.
U
Typ. Min.
Typ.
L MU
Max. Max.
f
L
-f
U
30-400
20.50.5
0.4
0.15
0.4
0.15
0.4
0.3
0.4
30
25
30
25
30
23
1.2
25
25
L= 30-100 MHz
M= 100-200 MHz
U= 200-400 MHz
1. Mainline loss includes theoretical power loss at coupled port.
CASE STYLE: J17
Connectors Model
Price
Qty.
BNC
ZFDC-20-1H(+)
$58.95 (1-9)
SMA
ZFDC-20-1H-S(+) $63.95
(1-9)
N-TYPE ZFDC-20-1H-N(+) $63.95
(1-9)
BRACKET (OPTION"B")
$5.00
(1+)
BNC version shown
Typical Performance Data
Bi-Directional Coupler Electrical Specifications
Maximum Ratings
Coaxial Connections
INPUT
S
OUTPUT
1
COUPLED (forward)
3
COUPLED (reverse)
2
Operating Temperature
-55C to 50C
Storage Temperature
-55C to 100C
Outline Drawing
Outline Dimensions ( )
inch
mm
ZFDC-20-1H
MAINLINE LOSS
0.0
0.1
0.2
0.3
0.4
0
50
100
150
200
250
300
350
400
FREQUENCY (MHz)
MAINLINE
LOSS
(dB)
at RF level of -10 dBm
ZFDC-20-1H
COUPLING & DIRECTIVITY
10
20
30
40
50
60
0
50
100
150
200
250
300
350
400
FREQUENCY (MHz)
C
O
U
P
L
I
N
G
&
D
I
R
E
C
T
I
V
I
T
Y
(
d
B
)
IN - CPL FWD
IN - CPL REV
at RF level of -10 dBm
ZFDC-20-1H+
ZFDC-20-1H
ZFDC-20-1H
RETURN LOSS
0
20
40
60
80
0
50
100
150
200
250
300
350
400
FREQUENCY (MHz)
R
E
T
U
R
N
L
O
S
S
(
d
B
)
IN
OUT
CPL FWD
CPL REV
at RF level of -10 dBm
electrical schematic
CPL
FORWARD
CPL
REVERSE
IN
OUT
50 30 to 400 MHz
Bi-Directional Coupler
REV. A
M106924
ZFDC-20-1H
WP/TD/CP/AM
060818
Coaxial
A
B
C
D
E
F
G
H
1.25
1.25
.75
.63
.38 1.000
.125 1.000
31.75 31.75 19.05 16.00
9.65 25.40
3.18 25.40
J
K
L
M
N
P
Q
wt
--
--
.125 1.688
2.18
.75
.07 grams
--
--
3.18 42.88 55.37 19.05
1.78
75.0
Features
high power, up to 25W
wideband, 30 to 400 MHz
excellent directivity, 30 dB typ.
low insertion loss, 0.15 dB typ.
rugged shielded case
Applications
VHF/UHF
instrumentation
communication receivers & transmitters
power leveling
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
Frequency
(MHz)
Mainline Loss
(dB)
Coupling
(dB)
Directivity
(dB)
Return Loss
(dB)
In-Out
In-Cpl Fwd
Out-Cpl Rev Out-Cpl Fwd
In-Cpl Rev
In
Out
Cpl Fwd
Cpl Rev
For option "B" with N-type connectors, dimension "C" increases to 0.94 inches.
30.00
0.11
20.74
20.73
36.33
39.08
17.88 17.93
17.83
17.78
47.50
0.07
20.68
20.66
36.66
39.46
21.75 21.84
22.02
21.88
65.00
0.07
20.63
20.62
36.97
39.93
24.43 24.65
25.33
25.13
82.50
0.08
20.59
20.58
37.14
40.58
26.31 27.05
28.32
28.10
100.00
0.11
20.59
20.58
37.19
40.42
27.24 28.65
30.88
30.36
150.00
0.16
20.63
20.62
38.74
38.06
27.92 30.48
33.62
34.39
200.00
0.19
20.69
20.67
36.80
35.64
29.69 30.30
33.78
39.07
288.89
0.21
20.77
20.74
33.49
32.92
29.81 29.10
30.60
35.64
333.33
0.23
20.80
20.77
31.88
31.46
29.73 28.43
28.85
31.36
400.00
0.24
20.83
20.80
29.81
29.45
28.38 27.54
26.14
26.41
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
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