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
1.8.3.3
863-873MHz cavity filter
The 863-873MHz cavity filter is typically dedicated to the European market. The purpose of
this filter is to allow co-located high power emitters (DVB-T, BTS), in case of poor isolation
between antennas (less than 50dB).
The 863-873MHz cavity filter characteristics are detailed in the following table:
Characteristics
Specification
Center Frequency
868 MHz
Pass band
863-873MHz
Insertion losses
≤1dB
Ripple
≤0.5dB
Return Loss
≥20dB
Rejection
≥80dB @ 10-700MHz
≥70dB @ 700-791MHz
≥60dB @ 791-821MHz
≥60dB @ 925-960MHz
≥70dB @ 960-1000MHz
≥80dB @ 1000-2700MHz
Impedance
50 ohms
Power Handling
≤20W
Temperature
-40°C to+85°C
Connectors
N-Female / N-Male
Waterproof
IP66
Surface Finish
Black Paint
Weight
<600g
Dimensions (w/o N connectors)
148 x 46 x 50 mm
The dimensions of the 863-873MHz cavity filter are detailed hereafter:
Figure 55 : Dimensions of the 863-873MHz cavity filter
The frequency response of 863-873MHz cavity filter is as follows: