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CPW-FED ALL-METALLIC VIVALDI ANTENNAS WITH PATTERN DIVERSITY FOR MILLIMETER WAVE 5G ACCESS POINTS

By G. S. Karthikeya, M. P. Abegaonkar, and S. K. Koul

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Abstract:
A coplanar waveguide (CPW) fed uniplanar all-metallic antenna is proposed for mmWave 5G access points. The antenna has an impedance bandwidth from 26 to 30 GHz with a corresponding end-fire gain of 8 dBi at 28 GHz. The effective radiating volume is 0.0031 λ03 indicating a high gain yield for minimal physical footprint. The radiation efficiency is 99.5%, and the losses are primarily due to finite conductivity of copper. The pattern integrity is high across the band with cross-polarization level below 30 dB, due to lack of electrically thick dielectric substrate. Industry standard low-cost chemical etching technique is used for fabrication of the prototype. A compact, co-polarized stacked beam switching module is also proposed for wide angular coverage with three-ports. This module houses the proposed all-metallic antennas for beam switchability. A customized 3D-printed scaffolding using polylactic acide (PLA) is designed to house the proposed antennas. The antenna module has a wide angular coverage of ±50º. Since the proposed antenna has high radiation efficiency with high gain for minimal physical footprint, it could be a potential solution for mmWave 5G access points. Detailed simulated and measured results are presented.

Citation:
G. S. Karthikeya, M. P. Abegaonkar, and S. K. Koul, "CPW-Fed All-Metallic Vivaldi Antennas with Pattern Diversity for Millimeter Wave 5G Access Points," Progress In Electromagnetics Research M, Vol. 94, 41-49, 2020.
doi:10.2528/PIERM20052003

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