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.
Max.
800-900
20.70.6
0.6
0.1
0.4
28
20
1.1
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
ZFBDC20-900HP
MAINLINE LOSS
0.0
0.1
0.2
0.3
800
820
840
860
880
900
FREQUENCY (MHz)
MAINLINE
LOSS
(dB)
at RF level of -10 dBm
ZFBDC20-900HP
COUPLING & DIRECTIVITY
10
15
20
25
30
35
40
800
820
840
860
880
900
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
ZFBDC20-900HP
ZFBDC20-900HP
RETURN LOSS
20
25
30
35
800
820
840
860
880
900
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 800 to 900 MHz
Bi-Directional Coupler
REV. OR
M95663
ZFBDC-20-900HP
WP/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
ZFBDC20-900HP
$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
800.00
0.13
20.24
20.31
27.20
24.84
23.29 23.46
27.07
27.50
811.25
0.11
20.20
20.24
26.84
25.58
23.46 23.61
27.44
27.82
830.00
0.13
20.13
20.19
26.62
25.41
23.69 23.88
28.08
28.28
841.25
0.13
20.08
20.15
26.22
25.63
23.80 23.97
28.43
28.53
848.75
0.13
20.05
20.11
26.10
25.73
23.91 24.10
28.69
28.74
860.00
0.13
20.00
20.07
26.12
26.00
24.05 24.22
29.09
29.10
871.25
0.13
19.96
20.03
25.83
26.34
24.16 24.39
29.54
29.37
875.00
0.13
19.95
20.00
25.57
26.37
24.20 24.44
29.58
29.44
890.00
0.13
19.89
19.96
25.56
26.84
24.38 24.62
30.18
29.85
901.25
0.13
19.86
19.91
25.69
26.80
24.47 24.70
30.59
30.08
For option B with N-Type connectors, dimension "C" increases to 0.94 inches.
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