access icon free Low profile broadband substrate-integrated waveguide to rectangular waveguide transition for W-band automotive radar

Low profile broadband substrate-integrated waveguide to rectangular waveguide (RWG) transitions have been proposed for RF verification of W-band automotive radar. The transition is designed on a PCB, which is assembled between the radar board and instrument waveguide port. In the design of the transition, a magnetoelectric (ME) dipole is introduced to excite the basic mode of RWG, and a bowtie slot is designed to excite the ME dipole with a broadband performance. The measured frequency band of back-to-back transitions is 68.4–85.3 GHz for a 5 mil RO3003 covered multilayer radar board and 68.6–89.3 GHz for a 10 mil RO3003 covered board, respectively. The calibrated single transition loss is 0.58 and 0.33 dB, respectively. The proposed low profile transitions are robust to assembly errors and convenient for fast RF verification of automotive front-end in the design stage.

Inspec keywords: dipole antennas; calibration; radar antennas; substrate integrated waveguides; UHF antennas; bow-tie antennas; loop antennas; rectangular waveguides; printed circuits; waveguide transitions; slot antennas; broadband antennas; road vehicle radar

Other keywords: W-band automotive radar; frequency 68.4 GHz to 85.3 GHz; noise figure 0.33 dB; frequency 68.6 GHz to 89.3 GHz; rectangular waveguide transition; broadband performance; magnetoelectric dipole; noise figure 0.58 dB; design stage; measured frequency band; calibrated single transition loss; RO3003 covered board; automotive front-end; fast RF verification; instrument waveguide port; low profile transitions

Subjects: Single antennas; Waveguide and microwave transmission line components; Radar equipment, systems and applications; Automobile electronics and electrics

References

    1. 1)
      • 7. Li, L., Chen, X., Khazaka, R., et al: ‘A transition from substrate integrated waveguide (SIW) to rectangular waveguide’. 2009 Asia Pacific Microwave Conf. (APMC), Singapore, 2009, pp. 26052608.
    2. 2)
    3. 3)
    4. 4)
      • 9. Hansen, S., Kueppers, S., Pohl, N.: ‘A wideband millimeter-wave SIW-to-RWG transition for thin single layer substrates with thick metal cladding’. 2018 48th European Microwave Conf. (EuMC), Madrid, 2018, pp. 117120.
    5. 5)
      • 12. Ahmad, W.A., Ng, H.J., Kissinger, D.: ‘Design of planar waveguide transition and antenna array utilizing low-loss substrate for 79 GHz radar applications’. 2019 IEEE Radio and Wireless Symp. (RWS), Orlando, FL, USA, 2019, pp. 13.
    6. 6)
    7. 7)
    8. 8)
      • 23. Lu, H.-C., Chu, T.-H.: ‘Equivalent circuit of radiating longitudinal slots in substrate integrated waveguide’. IEEE Antennas and Propagation Society Symp., Monterey, CA, USA, 2004, vol. 3, pp. 23412344.
    9. 9)
      • 2. RO3000® Series. Accessed: 15 June 2020. Available at https://rogerscorp.com/advanced-connectivity-solutions/ro3000-series-laminates.
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
    24. 24)
      • 16. Seo, K.: ‘Planar microstrip-to-waveguide transition in millimeter-wave band’, in Kishk, A. (Ed.): ‘Advancement in microstrip antennas with recent applications’ (InTech, Rijeka, Croatia, 2013), ch. 11, pp. 249277.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2020.2020
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