SPRACP3D November   2019  – August 2026 AWR6843 , AWR6843AOP , IWR1443 , IWR1642 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Typical Certification Procedure
  5. 3Regulatory Compliance Overview
    1. 3.1 European Union Regulations: Radio Equipment Directive (RED)
      1. 3.1.1 Short Range Radar (EN 305 550)
      2. 3.1.2 Short Range Level Probing Radar (EN 302 729)
        1. 3.1.2.1 Permitted Frequency Ranges and Operating Bandwidth
        2. 3.1.2.2 Antenna Requirements
      3. 3.1.3 RF Exposure Limit - EN 62311
      4. 3.1.4 Electrical Safety - EN 62368
      5. 3.1.5 Electromagnetic Compatibility (EMC) - EN 301 489
    2. 3.2 Federal Communications Commission (FCC)
      1. 3.2.1 End Equipment and FCC Clause
      2. 3.2.2 60GHz Radar Operation (47 CFR § 15.255)
        1. 3.2.2.1 Fundamental Emission Levels, BWs, and Max Duty Cycle
        2. 3.2.2.2 Spurious Emissions
        3. 3.2.2.3 Frequency Stability
        4. 3.2.2.4 FCC Waiver and Other Relevant Information
      3. 3.2.3 Level Probing Radar (47 CFR § 15.256)
        1. 3.2.3.1 Usage Limitations
        2. 3.2.3.2 Fundamental Emissions, BWs
        3. 3.2.3.3 Antenna Restrictions
        4. 3.2.3.4 Unwanted Emissions
      4. 3.2.4 Modular Approval (47 CFR § 15.212)
      5. 3.2.5 Radiation Exposure Requirement
    3. 3.3 Japan Radio Law
      1. 3.3.1 BW, Designated Frequency, and Tolerances
      2. 3.3.2 Out of Band and Spurious Emissions
      3. 3.3.3 Controller Functions
    4. 3.4 Wireless Planning and Coordination Wing (WPC)
      1. 3.4.1 Permitted Frequency of Operations and Approval
      2. 3.4.2 Equipment Type Authorization
    5. 3.5 Federal Telecommunications Institute (IFT)
      1. 3.5.1 Fundamental Emission Levels and BWs
    6. 3.6 National Telecommunications Agency (ANATEL)
      1. 3.6.1 Fundamental Emissions Levels, BWs, and Max Duty Cycle
      2. 3.6.2 Licenses
    7. 3.7 Ministry of Transport and Communications (MTC)
    8. 3.8 National Communications Entity (ENACOM)
  6. 4Applicable Terms and Equations
    1. 4.1 Duty Cycle Factor
    2. 4.2 Effective Isotropic Radiated Power (EIRP)
    3. 4.3 Friis Equation
    4. 4.4 Far-Field Boundary
  7. 5Tools and Setup
    1. 5.1 Hardware Setup
    2. 5.2 Internal Laboratory Test Setup
      1. 5.2.1 Near-Field Circuit Probing
      2. 5.2.2 Occupied Bandwidth Testing
      3. 5.2.3 Radiation Pattern Measurement
    3. 5.3 MMWAVESTUDIO
      1. 5.3.1 Running LUA Scripts
    4. 5.4 mmWave Visualizer
    5. 5.5 IWR6843ISK-ODS Test Case
  8. 6Common Issues and Resolutions
    1. 6.1 Peak Power
    2. 6.2 Occupied Bandwidth
    3. 6.3 Spurious Emissions
      1. 6.3.1 14.4GHz Harmonics
      2. 6.3.2 Suggested Resolution
        1. 6.3.2.1 Hardware Measures
        2. 6.3.2.2 Software Measures
          1. 6.3.2.2.1 APLL Duty Cycling
          2. 6.3.2.2.2 APLL VCO RTRIM Setting in BSS Firmware
    4. 6.4 Overshoot
    5. 6.5 Frequency Stability
      1. 6.5.1 Generating CW Signal
      2. 6.5.2 Frequency Stability Over Temperature and Voltage Range
    6. 6.6 EIRP Spiking and Spectrum Analyzer BW
  9. 7References
  10. 8Revision History

6.3.2.1 Hardware Measures

  • The shield or absorber must be placed as shown in Figure 6-3 and Figure 6-4.
  • Applicable mmWave devices, decoupling caps, crystal, and the surrounding PCB area must be covered by a shield or absorber.
  • The shield must be well grounded, covering the components of interest, and absorbers must be properly adhered to PCB and components of interest.
  • Make sure the height of the shield from the PCB is greater than or equal to 2mm above the RF traces; otherwise the RF transmission lines can couple with the shield and RF matching can get disturbed. Manufacturing tolerances, wear and tear, shield assembly, and so forth must be considered so that a 2mm+ height from the board is always maintained.
  • When using an RF absorber, the antenna must not be covered; the absorber must be placed such that the absorber does not go beyond the edge of the IC on the areas with the TX and RX traces.
  • Example of an absorber used to suppress the emission is Cuming Microwave (GDX/PPGA 0.03").
AM72 Shield Placement
All RF traces must be at least 2mm away from shielding cover.
Figure 6-3 Shield Placement
AM72 RF Absorber PlacementFigure 6-4 RF Absorber Placement