Isolated Combiners, CM-x8N series
4 x 4 Hybrid Coupler Matrix, Combiner & Splitter
Various bands from 350 to 2700 MHz
Rev. A
t Connects 4 inputs to 4 outputs
t Up to 30 dB Isolation, Low VSWR
t Guaranteed Low PIM, -155dBc
t Indoor and Outdoor Applications
t 100W/Input Average Power Rating
t N connectors
t RoHS compliant
4x4 Hybrid Coupler
CM-68N 698 - 960 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. (11/14)
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
698 - 960
1,710 - 2,170
698 - 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
100W
100W
3kW
3kW
3kW
4.9 (2.2)
3.3 (1.5)
1.8 (0.82)
23 dB
20 dB
>18 dB
100W
3kW
4.9 (2.2)
33 dB
30 dB
>25 dB
100W
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:
(two 20W tones)
<-165 dBc typical
<-155 dBc min.
Enclosure Finish:
Passivated Al.
Connectors Finish: Triplate, N (f)
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
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]