CONTENTS

 1     Introduction
        1.1     Approach
        1.2     Organization of the Report
 2     Related ITU-R Recommendations and Reports
 3     List of acronyms and abbreviations
 4     Regulatory information above 275 GHz
 5     System characteristics
        5.1     System characteristics of land mobile service applications operating in the frequency range 275-450 GHz
                  5.1.1     Close proximity mobile systems
                  5.1.2     Intra-device communications
                  5.1.3     Wireless links in data centres
        5.2     System characteristics of fixed service applications operating in the frequency range 275-450 GHz
                  5.2.1     Point-to-point fronthaul and backhaul
        5.3     System characteristics of the radio astronomy service operating in the frequency range 275-450 GHz
        5.4     System characteristics of Earth exploration-satellite service (passive) operating in the frequency range 275-450 GHz
 6     Considerations for sharing and compatibility studies
        6.1     RAS
        6.2     EESS (passive)
 7     Interference scenarios from land mobile and fixed service applications operating in the band 275-450 GHz to the passive service applications using spectrum identified in RR No. 5.565
        7.1     Interference scenarios from LMS applications operating in the band 275-450 GHz to EESS (passive) and RAS
        7.2     Interference scenarios from FS applications operating in the band 275-450 GHz to the EESS (passive) and RAS
 8     Sharing and compatibility studies related to EESS (passive)
        8.1     Sharing and compatibility studies between LMS applications and earth exploration-satellite service (passive) applications
        8.2     Sharing and compatibility studies between FS applications and EESS (passive) applications
        8.3     Summary of the sharing and compatibility studies related to EESS (passive)
 9     Sharing and compatibility studies related to RAS
        9.1     Sharing and compatibility studies between LMS application and radio astronomy service
        9.2     Sharing studies between FS applications and radio astronomy service
        9.3     Summary of the sharing and compatibility studies related to RAS
Annex 1
Annex 2  Extrapolation of building entry loss and clutter loss from Recommendations ITU-R P.2108 and ITU-R P.2109 for sharing and compatibility studies
Annex 3  Measurement results of radiation pattern of antenna at 300 GHz
Annex 4  Sharing studies between LMS and FS applications and Earth exploration satellite service
       A4.1     Introduction
       A4.2     Study 1: Static analysis between FS/LMS and EESS (passive)
                  A4.2.1     Maximum allowable single entry emission levels
                  A4.2.2     Maximum single entry emission levels of FS systems
                  A4.2.3     Summary of Study 1
       A4.3     Study 2: Assessment of FS interference to EESS (passive)
                  A4.3.1     Assessment of single entry FS interference to EESS (passive)
                  A4.3.2     Assessment of aggregate FS interference to EESS (passive)
                  A4.3.3     Summary
       A4.4     Study 3: Compatibility analyses between EESS (passive) and FS/LMS in the 275‑450 GHz frequency range
                  A4.4.1     Analysis methodology
                  A4.4.2     Characteristics of the EESS (passive) systems
                  A4.4.3     FS and LMS application characteristics
                  A4.4.4     Simulation results
                  A4.4.5     Summary of Study 3
       A4.5     Study 4: Aggregate analysis of sharing between FS/LMS stations and EESS (passive) between 275-325 GHz
                  A4.5.1     Introduction
                  A4.5.2     Received power level of EESS passive sensor
                  A4.5.3     CPMS deployment
                  A4.5.4     FS deployment
                  A4.5.5     Received power level of EESS (passive) sensors
                  A4.5.6     Summary of Study 4
       A4.6     Study 5: Compatibility analyses between EESS (passive) and FS in the 275-450 GHz frequency range (Aggregate case)
                  A4.6.1     EESS (passive) characteristics
                  A4.6.2     FS characteristics and deployment
                  A4.6.3     Maximum FS e.i.r.p. in direction of the EESS (passive) satellite
                  A4.6.4     Sharing studies with specific EESS (passive) system (ICI)
                  A4.6.5     Generic analysis in all EESS (passive) bands
                  A4.6.6     Summary of Study 5
                  A4.6.7     Annex 1 to Study 5 – Methodolgy used to derive number of fs links on a population based deployment
Annex 5  Sharing studies between FS applications and radio astronomy service
       A5.1     Introduction
       A5.2     Study 1: Compatibility between RAS and FS operations in the spectrum band 275‑450 GHz
                  A5.2.1     Assumptions and geometries
                  A5.2.2     Results
                  A5.2.3     Summary
       A5.3     Study 2: Compatibility analysis between FS and RAS in the 275-325 GHz band
                  A5.3.1     RAS sites
                  A5.3.2     Protection of RAS stations from FS stations operating in the 275-350 GHz band
                  A5.3.3     Summary of Study 2
       A5.4     Study 3: Protection of RAS stations from FS stations operating in the 275-450 GHz band