Cobham Wireless
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Coverage
BSF0060 User Handbook
www.cobham.com/wireless
Document number: BSF0060HBK
Issue number: 5
Date: 14/05/2018
Page 26 of 43
4.2.2.
Indoor Installations
4.2.2.1. Recommended Antennas
The following describes the requirements for an omnidirectional mobile used for indoor applications.
Specifications:
●
One or a combination of the following antennas can be used: Ceiling Mount Patch antenna,
Wall Mount Patch antenna, Corner Reflector.
●
Choose an antenna with high side lobe attenuation which enables maximum isolation from
other co-located antennas.
Equation (1) - Max SERVICE antenna gain
Max SERVICE antenna gain (dBi) = 39.1 – (37 dBm - # of antennas in dB – cable losses in dB).
For example:
No. of Antennas
Cable Losses
Max Allowed Antenna Gain
4
3
39.1 - (37-6-3) = 11.1 dBi
1
3
39.1- (37-0-3) = 5.1 dBi
10
3
39.1- (37-10-3) = 15.1 dBi
Typical Antenna Types:
●
Indoor Dome 2.1 dBi - beam width 360°
●
Indoor Panel 4.2 dBi - beam width 106°
●
Radiating Cable Typically < -50 dBi
4.2.2.2. Recommended Splitters and Couplers
Axell Wireless can supply a comprehensive range of splitters and Couplers to aid the installation of
the DAS system. Typical specifications as below:
Splitter Part Numbers
90-851202
90-851203
90-851204
Frequency Band
300 - 500 MHz
Split
2 way
3 way
4 way
Max Insertion Loss
0.3 dB
0.5 dB
0.4 dB
Split Loss
3 dB
4.8 dB
6 dB
Coupler Part Number
90-852306
90-852310
90-852315
90-852320
Frequency Band
300 - 500 MHz
Coupling
-6 dB ±1.0 dB
-10 dB ±1.0 dB
-15 dB ±1.0 dB
-20 dB ±1.0 dB
Max Mainline Loss
1.7 dB
0.8 dB
0.4 dB
0.22 dB
