Dual-Band Structure Reused Aperture-Sharing Antenna With Low Sidelobe and High Gain for 5G Communication

• Published in: IEEE antennas and wireless propagation letters 2024-04, Vol.23 (4), p.1386-1390
• Main Authors: Wang, Chuang, Cao, Wenquan, Ma, Wenyu, Li, Cong, Jing, Jiemin
• Format: Article
• Language: English
• Subjects: 5G mobile communication; Antenna arrays; Antenna radiation patterns; Antennas; Aperture antennas; Apertures; Band structure of solids; Dual-band; Electric fields; High gain; Microwave antenna arrays; Microwave antennas; Millimeter waves; Patch antennas; Radiators; shared-aperture; Sidelobe reduction; sidelobe suppression; Sidelobes; Slot antennas; structure reused; Substrate integrated waveguides
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2024.3356614

A dual-band structure reused aperture-sharing antenna is proposed in this letter. The millimeter-wave (mm-Wave) substrate integrated waveguide (SIW) slotted cavity backed antenna array, operating in TE 440 mode, is embedded into the microwave annular-ring patch antenna, operating in TM 12 mode, to share the radiation aperture. Furthermore, the SIW slot antenna radiator is reused as the field regulator for the microwave antenna, effectively canceling out the electric field opposite to the inner annular-ring patch. As a result, the sidelobe caused by the high-order TM 12 mode in the annular-ring patch antenna is successfully suppressed. Experimental results show that the operating bandwidth covers the 5G microwave band (3.4-3.6 GHz) and mm-Wave band (26.5-29.5 GHz). The measured gain reaches 10.65 and 18.5 dBi, respectively, while maintaining sidelobe levels below −18 dB. Furthermore, the antenna profile is only 0.012 λ 0 ( λ 0 is the wavelength in free space at low frequency). Therefore, a compact microwave and mm-Wave dual-band high gain shared-aperture antenna is realized, which provides a promising candidate for 5G communication applications.