Rec. ITU-T K.149 (12/2020) Passive intermodulation test methods of array antenna systems in mobile communication systems
Summary
History
FOREWORD
Table of Contents
Introduction
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Measuring method of passive intermodulation
     6.1 Requirements of test conditions
     6.2 Measurement accuracy
     6.3 Safety
     6.4 Test environment
     6.5 Test setup and procedure
          6.5.1 Testing the connection of coaxial cable
          6.5.2 Low intermodulation load
          6.5.3 Standard connector components
          6.5.4 PIM test configuration and test procedure
     6.6 The measurement uncertainty
Annex A  Antenna design and erection
     A.1 The impact of the environment on PIM
     A.2 Antenna port connection
     A.3 Antenna erection method to avoid passive intermodulation
     A.4 Adjacent passive intermodulation source
Annex B  Design and evaluation of the PIM test chamber
     B.1 Introduction
     B.2 RF absorbing material
     B.3 Support structure and walls
     B.4 RF shielding
     B.5 RF chamber evaluation
Bibliography