Policy on Intellectual Property Right (IPR)
1
Introduction
2
Scope
3
Related Reports and Recommendations in ITU-R
4
Definitions
5
Typical antenna configuration cases
5.1
Antenna isolation of space separated antennas
5.2
Antenna isolation of multi-band antennas
6
Basic analytical methods for determining antenna isolation
6.1
Horizontal space isolation calculation
6.2
Vertical space isolation calculation
6.3
Slant space isolation calculation
6.4
Simulation evaluation of analytical formulas
7
Additional considerations for antenna isolation
7.1
Influence of objects near the antenna
7.2
Frequency dependency
7.3
Polarization
7.4
Multiple interfering antennas
8
Antenna isolation measurements
8.1
Measurement methodology
8.2
Measurement results
8.2.1
Co-located base station antennas in the band 2 500-2 690 MHz
8.2.2
Measurements of horizontal separation in the 900, 1800 and 2 GHz bands
8.2.3
Measurements of vertical isolation on a real base station tower
8.2.4
Inter-band antenna isolation measurement results
9
Spurious emissions, blocking and intermodulation interference effects
9.1
Spurious emission interference isolation analysis
9.2
Blocking interference isolation analysis
9.3
Intermodulation interference isolation analysis
9.4
Isolation methodology
10
Summary and conclusions
Annex 1 Isolation calculation examples
1
Interference technical specifications
2
The isolation requirements for System A
2.1
The spurious emission isolation requirements for System A
2.2
The blocking isolation requirements for System A
2.3
The intermodulation isolation requirements for System A
2.4
Isolation requirements for System A
2.5
Conclusion
Annex 2 Simulation analysis of analytical methods for antenna isolation
1
Models for antenna isolation
2
Method for analysis
3
Results
4
Conclusions
Annex 3 Influence of objects near the
antenna
1
Example of a conductor mast’s influence on the isolation between two
half-wave dipole antennas
1.1
A scenario of two antennas sharing a conductor mast
1.2
The results’ reference value for real directional BS antenna
Annex 4 Theoretical derivation of the
equation for vertical separation
1
Theoretical derivation for the formula of vertical isolation between two
small dipoles
2
Theoretical derivation for the formula of vertical isolation between two
half-wave dipoles
Annex 5 Spurious emissions, blocking and intermodulation interference
effects
1
Spurious emission interference isolation analysis
2
Blocking interference isolation analysis
3
Intermodulation interference isolation analysis
Annex 6 Glossary