60 GHz Transmission and Reflection Measurements

1. 60 GHz Transmission and Reflection Measurements Date: 2009-09-23 Authors: Tian-Wei Huang, National Taiwan University

2. Horn Antenna Max. gain = 22.73 dB@4o Beamwidth = ~ 9o Tian-Wei Huang, National Taiwan University

3. Material under Test Tian-Wei Huang, National Taiwan University

4. Plastic Partition, M1 Tian-Wei Huang, National Taiwan University

5. Plywood, M2 Tian-Wei Huang, National Taiwan University

6. Thick Wood Board, M3 Tian-Wei Huang, National Taiwan University

7. Tempered Glass, M4 Tian-Wei Huang, National Taiwan University

8. Penetration Loss Measurement Setup 5cm in each direction 1 2 3 4 5 6 Penetration Loss = S21,air - S21,MUT 7 8 9 50 cm Tx Rx MUT Tian-Wei Huang, National Taiwan University

9. V-to-V Penetration LossPlastic Partition Loss average: 3.44 dB Standard deviation: 0.5 Tian-Wei Huang, National Taiwan University

10. V-to-V Penetration LossPlywood Loss average: 6.09 dB Standard deviation: 1.09 Tian-Wei Huang, National Taiwan University

11. V-to-V Penetration LossThick Wood Loss average: 9.24 dB Standard deviation: 0.73 Tian-Wei Huang, National Taiwan University

12. V-to-V Penetration LossTempered Glass Loss average: 4.00 dB Standard deviation: 0.40 Tian-Wei Huang, National Taiwan University

13. V2V and H2H Penetration Loss Comparison Unit: dB Tian-Wei Huang, National Taiwan University

14. Reflection Loss Measurement VNA direct path: reflection: Rotator Tx Rx 50 cm Tx Rx VNA θi θr 25 cm 25 cm MUT The EM waves travel the same distance through air for the two situations above. We can get the reflection loss of different incident angle θiby comparing their S21 on VNA. Reflection Loss = S21,direct - S21,reflection@θi Rotator Tian-Wei Huang, National Taiwan University

15. Vertical-to-Vertical Penetration Loss Measurement Setup E Rx H Tx θr θi H E Tian-Wei Huang, National Taiwan University

16. Vertical-to-Vertical Reflection (Loss compared to air) Unit: dB Tian-Wei Huang, National Taiwan University

17. V-to-V Reflection Loss vs. Incident Angle Tian-Wei Huang, National Taiwan University

18. Horizontal-to-Horizontal Penetration Loss Measurement Setup H Rx Tx E θr θi E H Tian-Wei Huang, National Taiwan University

19. Horizontal-to-Horizontal Reflection (Loss compared to air) Unit: dB Tian-Wei Huang, National Taiwan University

20. H-to-H Reflection Loss vs. Incident Angle Tian-Wei Huang, National Taiwan University

21. “Propagation of Radio”, Les Barclay, 2nd Edition, IEE 2003 Perpendicular Parallel Tian-Wei Huang, National Taiwan University

22. Multi-path Measurement d : the distance between two antenna Theta : the angle of horn rotating anti-clockwise Theta Tx : Omni-antenna Rx : horn d LNA 15 cm Table Tian-Wei Huang, National Taiwan University

23. Multi-path Measurement To achieve rotation, the receiver part slightly moves forward. Then it is able to raise the tail of LNA to realize angles of rotation. 2cm Rx : horn Rx : horn LNA LNA Theta Table Tian-Wei Huang, National Taiwan University

24. Multi-path Measurement The peak has 0.059ns difference, about 1.8cm difference in distance. When rotating the horn antenna, the horn slightly move forward for 2cm. d = 30cm Tian-Wei Huang, National Taiwan University

25. Multi-path Measurement For Theta = 20, the first peak and second peak has 11.03cm difference in distance. 19.7dB d = 30cm 0.368ns Tian-Wei Huang, National Taiwan University

26. Multi-path Measurement d = 30cm Tian-Wei Huang, National Taiwan University