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Alibakhshikenari, Mohammad, Zidour, Ali, Virdee, Bal Singh, Kouhalvandi, Lida, Shahid, Saleem, See, Chan Hwang and Limiti, Ernesto (2025) Innovative UWB phase shifters using groove gap-waveguide technology inspired by metasurfaces for beamforming networks operating at 100 GHz. In: 2024 IEEE Asia-Pacific Microwave Conference (APMC), 17-20 August 2024, Bali, Indonesia.
This paper presents the design of four phase shifters (+45°, +90°, +135°, +180°) for matrix-based beamforming networks (MB-BFN) in mm-wave antenna arrays. Utilizing groove gap-waveguide (GGW) technology with unequal-width, equal-length transmission lines, the design incorporates metasurface principles to achieve perfect magnetic conductor (PMC) boundary conditions. The metasurface features a "bed-of-nails" structure, where metal pins are connected to a bottom layer and spaced <λ/4 from a top plate. This configuration provides a UWB stop-band over the 80–110 GHz spectrum, ensuring effective phase shifting at 100 GHz within the ultra-wideband range.
Available under License Creative Commons Attribution 4.0.
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