Dual-Polarized Vivaldi Antenna Development for a Multi-technology Testbed

This paper presents the design, prototyping, characterization and implementation of a dual-polarized Vivaldi antenna for a multi-technology testbed. The antenna is designed for covering a wide variety of applications including Internet of things (IoT), wideband code-division multiple-access (WCDMA), high-speed packet access (HSPA), long-term evolution (LTE), 5G New Radio (NR) and Wi-Fi from 2 to 7.5 GHz. The Dual polarization feature is ensured by properly displacing the antenna elements for ensuring the same antenna structure for both polarizations, without electromagnetic performance degradation. The antenna provides 126% bandwidth from 1.7 to 7.5 GHz and gain of approximately 7.5 dBi at 3.5 GHz. A 100-MHz bandwidth 5G NR system in the 3.5 GHz band implementation demonstrates the applicability of the proposed antenna in a real scenario, as a function of signal-to-noise ratio (SNR), constellation and root mean square error vector magnitude (EVM
RMS%
).