Akademik Veri Yönetim Sistemi
Measurement: Journal of the International Measurement Confederation, cilt.257, 2026 (SCI-Expanded, Scopus)
This study introduces the development and experimental verification of a reconfigurable array and MIMO antenna system designed to operate at 18 GHz, 28 GHz, and 38 GHz—frequency bands that are critically important for next-generation wireless communication technologies, including 5G and beyond. The reconfigurability of both antenna types is achieved through the integration and dynamic control of PINs, allowing for the selective activation and deactivation of specific segments defined by designated geometric parameters. Simulation and experimental results of the proposed antennas, including scattering parameters and radiation patterns, are thoroughly investigated. Simulation results indicate that the array antenna achieves bandwidths of 0.80 GHz at 18 GHz, 2.62 GHz at 28 GHz, and 7.91 GHz at 38 GHz, respectively. This performance encompasses all FCC-designated millimeter-wave 5G bands. The MIMO antenna demonstrates a transmission coefficient below −25 dB for both PIN diode states, significantly exceeding the −10 dB isolation threshold. This result confirms the antenna's suitability for operation across the 18 GHz, 28 GHz, and 38 GHz frequency bands. Subsequently, the fabrication of both antennas was undertaken, and the measured parameters exhibited good agreement with the simulation results. The reconfigurable array antenna exhibits beam steering and pattern diversity capabilities essential for overcoming propagation challenges at millimeter-wave frequencies, while the MIMO antenna system leverages spatial multiplexing and diversity to enhance data rates and link reliability. The presented antenna designs offer versatility for future wireless systems and hold considerable promise for a multitude of advanced applications, including high-capacity data transmission and radar systems operating within the 5G bands.