SIW-Based Circularly Polarized Antenna Array for 60 GHz 5G Band: Feasibility Study

• Main Authors: Raida, Z. (Author), Spurek, J. (Author)
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: 5G mobile communication systems; 60 GHz band; antenna array; Antenna arrays; circular polarization; Circular polarization; Circularly polarized antennas; conversion; Conversion; Feasibility studies; Frequency ranging; Microstrip antennas; Microwave antennas; Millimeter waves; Parasitic patch; parasitic patches; Sensitivity analysis; Simple++; Slot antennas; Spectra's; Substrate integrated waveguides; Substrate-integrated waveguide; substrate-integrated waveguide (SIW); Substrate-integrated waveguides; Substrates
• Online Access: View Fulltext in Publisher

 At present, most millimeter wave 5G systems operate at frequencies ranging from 24 GHz to 39 GHz. Nevertheless, the new 5G release is going to increase the supported 5G spectrum into the 60 GHz band. In this communication, we discuss a methodology of converting a modular antenna array, which was originally designed for the 17 GHz unlicensed band, to the emerging 60 GHz 5G band. The antenna array is of a modular architecture, allowing a simple extension to a higher number of elements. The feeding structure is composed of substrate-integrated waveguides (SIW), allowing relatively simple and cheap manufacturing. As revealed by a sensitivity analysis, the frequency up-conversion significantly increases the need for precision of the used manufacturing technology. Subsequently, the structure is optimized to minimize the repercussions of manufacturing variations. The properties of the converted array are studied when equipped with parasitic patches to increase the axial ratio (AR) bandwidth. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.