Dual-Band Structure Reused Antenna Based on Quasi-Elliptic Bandpass Frequency Selective Surface for 5G Application

• Published in: IEEE transactions on antennas and propagation Vol. 68; no. 11; pp. 7612 - 7617
• Main Authors: Zhang, Jin, Zhang, Shuai, Pedersen, Gert Frolund
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 5G antennas; Antenna arrays; Antennas; Apertures; Band structure of solids; Bandpass; Bandwidth; Dual band; Filtering theory; Frequency selective surfaces; K-band; metasurface; Radiators; Selectivity; structure-reused antenna (SRA); Unit cell
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2020.2990225

A dual-band structure-reused antenna with quasi-elliptic bandpass feature is proposed in this communication. The antenna consists of a cavity-backed slot array working at <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula>-band (24.2-26.1 GHz) and a frequency selective surface (FSS), which is transparent to the <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula>-band radiation and also reused as a radiator at <inline-formula> <tex-math notation="LaTeX">S </tex-math></inline-formula>-band (2.5-2.7 GHz). The FSS unit cells are designed based on the cross-slot structure. By introducing asymmetric boundaries to each unit cell, the FSS obtains high-frequency selectivity with two transmission zeros located on each side of the passband. The proposed antenna is fabricated and measured. The measurements have a good matching with the simulations.