US 12,327,928 B1
Multi-frequency base station antenna unit and communication device
Wenquan Che, Guangzhou (CN); Yongzheng Li, Guangzhou (CN); Wanchen Yang, Guangzhou (CN); and Quan Xue, Guangzhou (CN)
Assigned to South China University of Technology, Guangzhou (CN)
Appl. No. 18/875,413
Filed by South China University of Technology, Guangzhou (CN)
PCT Filed Oct. 9, 2022, PCT No. PCT/CN2022/124196
§ 371(c)(1), (2) Date Dec. 16, 2024,
PCT Pub. No. WO2023/240848, PCT Pub. Date Dec. 21, 2023.
Claims priority of application No. 202210678337.2 (CN), filed on Jun. 16, 2022.
Int. Cl. H01Q 5/307 (2015.01); H01Q 1/24 (2006.01); H01Q 13/20 (2006.01)
CPC H01Q 5/307 (2015.01) [H01Q 1/24 (2013.01); H01Q 1/246 (2013.01); H01Q 13/20 (2013.01); H01Q 13/206 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A multi-frequency base station antenna unit, comprising a first radiator and a second radiator,
wherein the first radiator comprises first radiation structure, which has at least one operating frequency band, and a coupling resonance structure; a first extra operating frequency band is able to be generated by loading the coupling resonance structure on the first radiation structure;
the second radiator is located above the first radiator and configured to generate a second extra operating frequency band;
a resonant frequency fL of the coupling resonance structure is within a range of 0.68f0-0.87f0, and a center frequency fH of the second extra operating frequency band generated by the second radiator is greater than f0, wherein f0 is a center frequency of a lowest operating frequency band of the first radiation structure, and the resonant frequency of the coupling resonance structure refers to a frequency at which a lowest-order eigenmode of the coupling resonance structure is located;
the first radiator and the second radiator have respective independent feed structures;
the first radiator comprises a second dielectric block, a third dielectric block, a second dielectric substrate, a fourth dielectric block, and a low-frequency feed structure successively from top to bottom;
the fourth dielectric block is loaded with the coupling resonance structure; the coupling resonance structure is in the form of upward-opening rectangular split-ring shaped metal foils and located on four side surfaces of the fourth dielectric block; a vertical distance gap between an upper edge of the coupling resonance structure and a bottom surface of the second dielectric substrate is less than 0.01λ0, wherein λ0 is a wavelength at a center frequency of an operating frequency band of the first radiation structure; the coupling resonance structure is loaded to generate the first extra operating frequency band.