Isolated Combiners, CM-x8N series
4 x 4 Hybrid Coupler Matrix, Combiner & Splitter
Various bands from 350 to 2700 MHz
Rev. C
t Connects 4 inputs to 4 outputs
t Up to 30 dB Isolation, Low VSWR
t Low Specified PIM
t Indoor and Outdoor Applications
t Up to 150W/Input Continuous
Avgerage Power
t N connectors
t RoHS compliant
4x4 Hybrid Coupler
CM-88N 694 - 2700 MHz
The 4x4 Hybrid is a matrix of four 3 dB Hybrid Couplers arranged so that signals applied to any of the four inputs will
be split equally between the four outputs. This allows simple combining of multiple signals in the same wireless band to
a common feeder cable, as might be required in a neutral host in-building distributed antenna system, or the decoupled
combining of 4 transmitter or receiver signals equally to 4 antennas. Unused ports must be terminated externally in 50W,
with an appropriate PIM performance. Note that the phase relationship of the outputs in these models is not consistent.
Special attention has been directed in these versions to maximize isolation in the wireless bands and minimize passive
intermodulation (PIM). Units may be ordered moisture sealed for outside applications to meet IP67.
Model Number
Frequency
Range, MHz
Coupling
dB
Input Isolation*
typical
min
Return
Loss, dB
Power per Input Weight, nom.
Avg.
Peak
lbs. (kg)
CM-58N
CM-68N
CM-78N
CM-88N
1710 - 2700
694 - 960
1,710 - 2,170
694 - 800
800 - 2600
2600 - 2700
350 - 380
380 - 520
6.2 ± 0.8
6.2 ± 0.6
6.2 ± 0.6
6.0 ± 1.8
6.2 ± 1.2
6.4 ± 1.4
6.0 ± 0.8
6.1 ± 0.6
27 dB
32 dB
32 dB
25 dB
28 dB
28 dB
>23 dB
>23 dB
>23 dB
100W
150W
100W
3kW
3kW
3kW
4.9 (2.2)
3.3 (1.5)
1.8 (0.82)
23 dB
20 dB
>18 dB
150W
3kW
4.9 (2.2)
33 dB
30 dB
>25 dB
150W
3kW
3.5 (1.6)
CM-98N
*Requires all unused ports to be terminated with loads of return loss > 32dB
CM-78N Isolation
Impedance:
50W nominal
Environment:
-40 to +55°C, IP64
(IP67 to order)
PIM, Intermod:
-161 dBc
(two 20W tones)
Enclosure Finish:
Passivated Al.
Connectors Finish: Triplate, N (f)
Note: Specifications are subject to change without prior notification.
Microlab, A Wireless Telecom Group Company, 25 Eastmans Road, Parsippany, NJ 07054
Tel: (973) 386-9696 • sales@microlab.fxr.com • www.microlab.fxr.com • Fax: (973) 386-9191
06MAY2016
Isolated Combiners, CM-x8N series
Page 2
CM-78N Outline
1.39
[35.26]
4.74
[120.40]
1.12
[28.45]
.69
[17.53]
Input 1
Input 2
.93
[23.69]
1.12
[28.45]
1.12
[28.45]
Input 3
Input 4
DC Paths
All paths DC Isolated
except:
Input 1 to Output 1
Input 2 to Output 2
Input 3 to Output 3
Input 4 to Output 4
3.29
[83.52]
CM-78N
1710 - 2170 MHz
Output 1
Output 2
Output 3
3.69
[93.68]
Output 4
.20
[5.08]
Ø.21 THRU
[5.21]
.20
[5.08]
CM-58N, 68N, 88N & 98N Outline
8.69
[220.68]
2.43
[61.67]
2.43
[61.67]
.70
[17.83]
INPUT 1
4.34
[110.24]
INPUT 2
1.34
[33.99]
.91
[23.05]
2.43
[61.67]
INPUT 3
INPUT 4
3.30
B
[83.77]
3.70
A
[93.93]
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
.20
[5.08]
.20
[5.08]
8.29
[210.52]
DC Paths
All paths DC Isolated except:
Input 1 to Output 1
Input 2 to Output 2
Input 3 to Output 3
Input 4 to Output 4
Ø.21 THRU
[Ø5.21]
Model DimensionDimension
NumberA
B
CM-58N
CM-68N
CM-88N
CM-98N
4.94 (125.5)
3.70 (93.93)
4.99 (126.7)
3.91 (99.31)
4.54 (115.3)
3.30 (83.77)
4.59 (116.6)
3.51 (89.20)
Microlab, A Wireless Telecom Group Company, 25 Eastmans Road, Parsippany, NJ 07054
Tel: (973) 386-9696 • sales@microlab.fxr.com • www.microlab.fxr.com • Fax: (973) 386-9191
.91
[23.05]