Mini-Circuits - Specification for Directional Coupler - ZFDC-20-50
Directional Coupler
ZFDC-20-50
Frequency
MHz Coupling
dB Mainline Loss
dB Directivity
dB VSWR
(:1) Power
INPUT, W
fL - fUNom. Flatness L
Typ. Max. M
Typ. Max. U
Typ. Max. L
Typ. Min. M
Typ. Min. U
Typ. Min. Typ. L
Max. MU
Max
20-2000 19.5±0.50 ±0.8 0.80 1.30 0.70 1.30 1.00 1.60 30 20 25 20 22 10 1.25 1.0 1.0
L=low range(fL to 10fL) M=mid range(10fL to fU/2) U=upper range(fU/2 to fU)
Pin Connections
Port Input Output Coupled
(forward) Coupled
(reverse)
dc 3 1 2 -
Not Used Case GND Termination GND
- - - -
Case Style - K18 (inch,mm ) weight: 70 grams.
A B C D E F G H J
1.25
31.750 1.25
31.750 .75
19.050 .63
16.002 .38
9.652 1.000
25.400 .125
3.175 1.000
25.400
K L M N P Q R S T
.125
3.175 1.688
42.875 2.18
55.372 .75
19.050 .07
1.778
Tolerance: .x ± .1 .xx ± .03 .xxx ± .015 inch.
Material and Finish:
Case material: aluminum alloy. Finish: grey paint or yellow
iridite.
Mounting bracket finish: iridite or clear anodize.
Mounting:
Mounting bracket available on request. Add suffix B to part
number.
Marking:
For port markings 1, 2, and 3 see specification data sheet.
Connectors:
Connectors: please specify, unless otherwise noted; BNC is
standard, TNC, SMA and Type N, consult factory. (ZAPD -4
units not available with BNC).
For Bracket Version, Option B, this dimension, "C*", changes
from 0.75 to 0.94 inches when connectors are type N or TNC.
Notes:
•Mainline Loss includes theoretical power loss at coupled port.
•Available only with SMA connectors
•Above 1000 MHz, coupling flatness ±1 dB.
•General Quality Control Procedures and Environmental Specifications are given in Mini-
Circuits Guarantees Quality.
Hi-Rel, MIL description are given in Hi-Rel and MIL
•Prices and Specifications subjects to change without notice.
FREQ
(MHz) I. Loss (dB)
In-Out Coupling (dB)
In-CPL Directivity (dB) Return Loss (dB)
In Out CPL
20.00 0.91 19.45 53.86 34.41 17.49 18.75
38.00 0.77 19.29 57.40 38.11 19.79 21.67
56.00 0.72 19.25 58.72 39.47 20.83 23.11
74.00 0.69 19.23 58.66 39.44 21.45 23.98
92.00 0.68 19.22 59.19 39.97 21.91 24.59
110.00 0.67 19.21 59.06 39.85 22.25 25.04
128.00 0.66 19.22 58.71 39.49 22.53 25.36
146.00 0.66 19.22 58.22 39.00 22.75 25.58
164.00 0.66 19.23 57.70 38.47 22.95 25.73
182.00 0.66 19.24 57.11 37.88 23.12 25.86
200.00 0.66 19.24 56.95 37.70 23.30 25.96
270.00 0.68 19.31 54.35 35.04 24.02 26.17
340.00 0.70 19.38 52.57 33.19 24.78 26.22
410.00 0.72 19.44 50.51 31.07 25.56 26.29
480.00 0.73 19.54 48.95 29.40 26.36 26.38
550.00 0.76 19.64 47.49 27.85 27.03 26.52
620.00 0.78 19.72 46.28 26.56 27.28 26.71
690.00 0.80 19.81 45.29 25.48 27.06 26.84
760.00 0.83 19.88 44.47 24.60 26.34 27.00
830.00 0.86 19.93 43.72 23.80 25.33 27.14
900.00 0.87 19.98 43.00 23.02 24.17 27.23
920.00 0.89 19.99 42.87 22.88 23.84 27.23
940.00 0.90 19.98 42.71 22.73 23.50 27.29
960.00 0.89 20.00 42.52 22.52 23.17 27.31
980.00 0.90 20.03 42.38 22.36 22.84 27.28
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Mini-Circuits - Specification for Directional Coupler - ZFDC-20-50
1000.00 0.92 20.04 42.27 22.23 22.52 27.23
1020.00 0.93 20.03 42.10 22.07 22.22 27.22
1040.00 0.94 20.03 41.99 21.96 21.91 27.26
1060.00 0.94 20.05 41.88 21.83 21.60 27.18
1080.00 0.94 20.07 41.77 21.70 21.30 26.96
1100.00 0.96 20.08 41.67 21.59 21.01 26.89
1190.00 1.01 20.10 41.30 21.21 19.79 26.78
1280.00 1.05 20.08 41.03 20.95 18.70 26.44
1370.00 1.11 20.07 40.93 20.86 17.74 25.81
1460.00 1.16 20.08 40.91 20.83 16.86 25.10
1550.00 1.19 20.14 41.05 20.90 16.07 24.40
1640.00 1.21 20.21 41.17 20.96 15.35 23.75
1730.00 1.25 20.26 41.45 21.19 14.68 23.05
1820.00 1.32 20.28 41.51 21.23 14.06 22.34
1910.00 1.40 20.27 41.40 21.13 13.48 21.54
2000.00 1.51 20.25 41.05 20.80 12.92 20.68
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