Integration of SSPP Antenna and Vivaldi Arrays for 5G Sub-6 GHz and Millimeter-Wave Applications

An integrated antenna system covering 5G Sub-6 GHz and millimeter-wave bands is proposed, combining a spoof surface plasmon polariton (SSPP) antenna and two Vivaldi arrays. The integrated design comprises three radiators: an SSPP array, a linear tapered slot (LTS), and Vivaldi arrays. The SSPP antenna (excited by port 1) operates in the Sub-6 GHz band (SUB: 4 GHz to 4.9 GHz and 5.3 GHz to 6 GHz) through its SSPP array, while the LTS covers millimeter-wave band 1 (MMW-1: 23 GHz to 25.8 GHz). Dual Vivaldi arrays, symmetrically distributed on both sides of the antenna and excited by ports 2 and 3, operate in millimeter-wave band 2 (MMW-2: 18 GHz to 25.8 GHz). Measured results demonstrate average realized gains of 11 dBi (SUB), 13 dBi (MMW-1), and 14 dBi (MMW-2). This design shows potential for 5G communication and radar systems.