Wirnet iBTS
Document title : Installation and
Maintenance Manual
Version : 2.0
Author : SNI
Date : 04/12/2018
Classification
This document is the strict property of Kerlink and shall not be either copied nor sent without express
written authorization of Kerlink
Internal Use
Kerlink m2m technologies reserved rights
Confidential
Kerlink – 1 rue Jacqueline Auriol – 35235 THORIGNÉ-FOUILLARD
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Strict confidential
1.8.3
Cavity filters
1.8.3.1
865-867MHz cavity filter
The 865-867MHz cavity filter is typically dedicated to the Indian market. The purpose of this
filter is to avoid saturation and desensitization of the LoRa receiver due to co-located LTE850
or CDMA800 base stations.
The 862-867MHz cavity filter characteristics are detailed in the following table:
Characteristics
Specification
Pass band
865-867MHz
Insertion losses
≤4dB
Ripple
≤1.0dB
Return Loss
≥18db
Rejection
≥60dB @ 806-860MHz
≥40dB @ 862MHz
≥50dB @ 869MHz
≥70dB @ 871-960MHz
Impedance
50 ohms
Power Handling
≤10W
Temperature
-30°C to+60°C
Connectors
N-Female / N-Male
Waterproof
IP66
Surface Finish
Black Paint
Dimensions (w/o N connectors)
196 x 104 x 50 mm
The dimensions of the 865-867MHz cavity filter are detailed hereafter:
Figure 51 : Dimensions of the 865-867MHz cavity filter
