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<p>This paper proposes a W-band ultrathin waveguide power divider based on magic-T. In this design, the waveguide height is reduced to match the thickness of the input and output microstrip substrates, thereby achieving a low physical profile. Additionally, a novel compact “tapered microstrip-to-dielectric-filled reduced-height waveguide-to-air-filled reduced-height waveguide” transition structure is adopted at the input and output ports. This configuration enables broadband impedance and mode matching while achieving planar monolithic integration with the input and output microstrip circuits. The measured results are in good agreement with the simulations. Over 90–100&#xa0;GHz frequency band, the insertion loss of each output branch is better than 0.9&#xa0;dB, the return loss is better than 13&#xa0;dB, the isolation between the two output ports is better than 14&#xa0;dB, and the amplitude imbalance is less than 0.9&#xa0;dB. The proposed structure provides an effective solution for achieving compact planar monolithic integration in millimeter-wave front ends.</p>

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W-Band Ultrathin Waveguide Power Divider Based on Magic-T

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Jiapan Yu,
  • Yong Liu,
  • Yi Cao,
  • Junling He,
  • Xiaohong Tang,
  • Zongqi Cai

摘要

This paper proposes a W-band ultrathin waveguide power divider based on magic-T. In this design, the waveguide height is reduced to match the thickness of the input and output microstrip substrates, thereby achieving a low physical profile. Additionally, a novel compact “tapered microstrip-to-dielectric-filled reduced-height waveguide-to-air-filled reduced-height waveguide” transition structure is adopted at the input and output ports. This configuration enables broadband impedance and mode matching while achieving planar monolithic integration with the input and output microstrip circuits. The measured results are in good agreement with the simulations. Over 90–100 GHz frequency band, the insertion loss of each output branch is better than 0.9 dB, the return loss is better than 13 dB, the isolation between the two output ports is better than 14 dB, and the amplitude imbalance is less than 0.9 dB. The proposed structure provides an effective solution for achieving compact planar monolithic integration in millimeter-wave front ends.