1. Mainline loss includes theoretical power loss at coupled port.
FREQ.
(MHz)
COUPLING
(dB)
MAINLINE LOSS
1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
f
L
-f
U
Nom.
Flatness
Typ. Max.
Typ. Min.
Typ.
L
MU
Max.
Max.
860-970
20.40.6
0.6
0.1
0.4
28
20
1.1
10
10
Typical Performance Data
Bi-Directional Coupler Electrical Specifications
Maximum Ratings
Coaxial Connections
INPUT
2
OUTPUT
3
COUPLED (forward)
1
COUPLED (reverse)
S
Operating Temperature
-55C to 100C
Storage Temperature
-55C to 100C
Outline Drawing
Outline Dimensions ( )
inch
mm
ZFBDC20-970HP
MAINLINE LOSS
0.0
0.1
0.2
0.3
860 870 880 890 900 910 920 930 940 950 960 970
FREQUENCY (MHz)
MAINLINE
LOSS
(dB)
at RF level of -10 dBm
ZFBDC20-970HP
COUPLING & DIRECTIVITY
15
20
25
30
35
860 870 880 890 900 910 920 930 940 950 960 970
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
OUT-CPL FWD
at RF level of -10 dBm
ZFBDC20-970HP
ZFBDC20-970HP
RETURN LOSS
22
24
26
28
30
860 870 880 890 900 910 920 930 940 950 960 970
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 High Power 860 to 970 MHz
Bi-Directional Coupler
REV. OR
M95663
ED-1612
ZFBDC-20-970HP
DJ/TD/CP
060802
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
very low insertion loss, 0.1 dB typ.
excellent directivity, 28 dB typ.
excellent VSWR, 1.1: typ.
high power operation, 10W
Applications
VSWR measurement
power monitoring of cellular transmitters
power levelling
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
CASE STYLE: J17
Connectors Model
Price
Qty.
SMA
ZFBDC20-970HP
$79.95 (1-9)
BRACKET (OPTION "B")
$2.50
(1+)
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.
860.00
0.11
20.97
21.06
26.72
22.08
25.04 25.31
28.46
27.67
875.00
0.19
20.96
21.06
26.84
21.99
24.74 24.96
27.84
27.16
885.00
0.17
20.90
21.01
26.96
21.92
24.57 24.75
27.46
26.85
896.25
0.12
20.83
20.95
27.11
21.92
24.37 24.52
27.06
26.50
902.50
0.09
20.81
20.93
27.12
21.84
24.27 24.42
26.87
26.34
908.75
0.08
20.79
20.90
27.26
21.83
24.15 24.29
26.65
26.15
915.00
0.08
20.77
20.89
27.33
21.78
24.06 24.17
26.44
25.96
920.00
0.08
20.76
20.87
27.46
21.77
24.00 24.08
26.29
25.84
957.00
0.07
20.65
20.76
27.87
21.87
23.46 23.47
25.28
24.93
970.00
0.08
20.62
20.73
28.10
21.55
23.30 23.36
24.99
24.66
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