SWRA705 August   2021 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR2944 , AWR6443 , AWR6843 , AWR6843AOP , AWRL1432 , AWRL6432 , IWR1443 , IWR1642 , IWR1843 , IWR2243 , IWR6243 , IWR6443 , IWR6843 , IWR6843AOP , IWRL6432 , IWRL6432AOP

 

  1.   Trademarks
  2. 1 Introduction and Challenges
  3. 2 Radome Design Elements
    1. 2.1 Understanding Dielectric Constant and Loss tangent on Radome and Antenna Design
    2. 2.2 Impedance Mismatch at Radome Boundaries
    3. 2.3 Radome Wall Thickness
    4. 2.4 Antenna to Radome Distance
  4. 3 Typical Radome Material Examples
  5. 4 Radome Angle Dependent Error
    1. 4.1 Rectangular Radome Angle Dependent Error
    2. 4.2 Spherical Radome Angle Dependent Error
    3. 4.3 Effect of the Angle Error in the Application
  6. 5 Radome Design and Simulations
  7. 6 Radome Lab Experiments
    1. 6.1 Radome Experiment – 1: Flat Plastic Radome
    2. 6.2 PTFE Material Rectangular Radome
    3. 6.3 PTFE-Based Curved Radome
  8. 7 Additional Considerations
    1. 7.1 Antenna Calibration
    2. 7.2 Radome Near Proximity Considerations
  9. 8 Summary
  10. 9 Acknowledgments
  11. 10References

6.3 PTFE-Based Curved Radome

The third experiment was performed using a curved shaped radome with 1.524 mm wall thickness using PTFE material as shown in Figure 6-7.

GUID-20210422-CA0I-GKXK-P92P-6QX5F8TZNVMN-low.jpg Figure 6-7 The PTFE Curved Shaped Radome With 1.524 mm Wall Thickness

Figure 6-8 through Figure 6-11 show the curved shaped PTFE material radome antenna radiation pattern and angle estimation. Compared to rectangular radome, the curved shaped radome shows better results with less distortion or ripples in antenna radiation patterns and lower angle estimation errors at wider FoV angles. The phase calibration applied in Figure 6-9 and Figure 6-11 is discussed in Section 7.1, and as can be seen in the figures, it shifts the angle error curve such that the estimated angle is adjusted to zero at the antenna boresight.

GUID-20210607-CA0I-SNW0-R1QC-L0RNLFQS4RJM-low.pngFigure 6-8 Antenna Radiation Pattern Measurement With no Radome
GUID-20210607-CA0I-MP03-0PXZ-RBLK69BWHVMD-low.pngFigure 6-10 Elevation Antenna Radiation Pattern With the Curved Shape Radome
GUID-20210609-CA0I-3BFB-XGKG-8CGNLZF6PPNF-low.pngFigure 6-9 Azimuth Angle Estimation Error Measurement With no Radome - With and Without Phase Calibration
GUID-20210609-CA0I-RLBR-CPDN-6X7V1KGRFPRW-low.pngFigure 6-11 Azimuth Angle Estimation Error Measurement With the Curved Shape Radome - With and Without Phase Calibration