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Wideband Gap-Waveguide Phase Shifter Based on a Glide-Symmetric Ridge
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  • Ángel Palomares-Caballero ,
  • Carlos Megías ,
  • Carlos Molero ,
  • Antonio Alex-Amor ,
  • Pablo Padilla
Ángel Palomares-Caballero
Universidad de Granada, Universidad de Granada

Corresponding Author:[email protected]

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Carlos Megías
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Carlos Molero
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Antonio Alex-Amor
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Pablo Padilla
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This letter presents a gap-waveguide phase shifter based on ridged unit cells with glide-symmetric configuration. The proposed unit cell design provides a higher stable phase shift compared to a conventional ridged  unit cell whose ridge height and waveguide width are tuned to achieve a stable phase shift. Through the insertion of glide-symmetric holes with semi-circle base in the ridged waveguide, a stable phase shift in a wide frequency range is achieved. Depending on the radii of the holes, the operating frequency range of the phase shifter can be tuned. A 90o phase shifter in millimeter-wave range is designed and manufactured to validate the analysis. The experimental results reveal a 85o +- 5o phase shift from 33 GHz to 43 GHz (26.3% bandwidth). In this bandwidth, the reflection coefficient is below -10 dB with a maximum insertion loss of 0.7 dB.
Jan 2023Published in IEEE Microwave and Wireless Technology Letters volume 33 issue 1 on pages 27-30. 10.1109/LMWC.2022.3203657