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A novel racetrack low-sidelobe large-aperture slotted waveguide antenna for high-power microwave applications

Author

Listed:
  • Wanshan Hou
  • Haixia Liu
  • Yu Qin
  • Wenlong Li
  • Licun Wang
  • Pengkun Gao
  • Liangjie Bi
  • Lin Meng
  • Hailong Li
  • Bin Wang
  • Yong Yin

Abstract

An S-band racetrack slotted waveguide antenna (SWA) with low profile, high radiation efficiency (RE), low sidelobe levels (SLL), and high power capacity (PC) is presented. The antenna has only one feed port, eliminating the need for a complex T-type waveguide unequal-amplitude power divider network, and consists of a bent waveguide phase compensation structure (BWPCS) and a radiation array. The BWPCS is designed to ensure that each waveguide receives the residual microwave energy in phase, enabling a high gain (G) level. A new slot conductance formula is proposed to achieve high RE and low SLL. A ceramic radome was introduced to maintain the vacuum environment to enhance PC. Simulations at 2.458 GHz show a reflection coefficient below −26.6 dB, G of 28.09 dBi, RE of 99.73%, E-plane SLL of −29.4 dB, and H-plane SLL of −30 dB. The PC of the SWA reaches 1.56 GW.

Suggested Citation

  • Wanshan Hou & Haixia Liu & Yu Qin & Wenlong Li & Licun Wang & Pengkun Gao & Liangjie Bi & Lin Meng & Hailong Li & Bin Wang & Yong Yin, 2026. "A novel racetrack low-sidelobe large-aperture slotted waveguide antenna for high-power microwave applications," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 40(4), pages 482-501, March.
    • Handle: RePEc:taf:tewaxx:v:40:y:2026:i:4:p:482-501
    DOI: 10.1080/09205071.2025.2593511
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