Antenna Separation - Sierra Wireless AirLink ES450 Hardware User's Manual

AirLink ES450 Hardware User Guide
Warning:
multiple connections), you must follow the maximum dBi gain guidelines specified by the radio
communications regulations of the Federal Communications Commission (FCC) or Industry Canada
or your country's regulatory body (if used outside the U.S.A.). Also see
North American Users on Radiation Exposure

Antenna Separation

Inadequate antenna separation between the primary and secondary antennas creates
unwanted interference that can cause reduction in:
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Antenna separation recommendations:
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Note: The values in the following table are approximate antenna separation values for monopole or
dipole type antennas.
Table 3-1: Recommended Antenna Separation
Rev. 7 July 2019
In more complex installations (such as those requiring long lengths of cable and/or
Antenna efficiency
Transmit power
Receiver sensitivity
Data throughput
Radio front-end life span
The antennas should be separated so that there is at least 10 dB isolation over the
entire operating frequency range.
The separation should be at least 1/4 wavelength (), but preferably
1/2 wavelength () or greater of the lowest operating frequency. See
specific recommendations, based on your network type and frequency.
Service Frequency
4G LTE
4G LTE
4G LTE
4G LTE
4G LTE
4G LTE
3G WCDMA HSPA
3G WCDMA HSPA
3G WCDMA HSPA
3G WCDMA HSPA
3G CDMA/EV-DO
3G CDMA/EV-DO
on page 44 for more information.
Wavelength ()
(MHz) (mm)
700 428
800 375
900 333
1800 167
2100 143
2600 115
850 353
900 333
1900 158
2100 143
800 375
1900 158
29
Important Information for
Table 3-1
Best Antenna Good Antenna
Separation (mm) Separation (mm)
(1/2 ) (1/4 )
214 107
187 94
167 83
83 42
71 36
58 29
176 88
167 83
79 39
71 36
187 94
79 39
for
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