S-band dual-polarized base station antenna and base station for mobile 5g communication

Abstract

The invention provides an S-band dual-polarization base station antenna for mobile 5G communication, and a base station. The antenna comprises a radiation patch, an open circuit matching branch node,a patch metasurface and a coaxial feed probe. The tail end of the coaxial feed probe is connected with the radiation patch, and the open circuit matching branch node is connected with the coaxial feedprobe. The radiation patch comprises a square patch which is etched with four axial symmetrical gaps, and the tail ends of the two coaxial probes are connected with the patch, wherein the distances from the feed points to the center of the patch are equal. The two sections of the open circuit matching branch node are respectively connected with the two coaxial probes and are located below the radiation patch. The multi-patch metasurface layer comprises 12 circular patches and four square patches at four corners, and is located right above the radiation patches. The antenna is simple in structure and low in manufacturing cost, and greatly reduces the profile of the antenna on the premise that the size is guaranteed. The working frequency band covers the 5G frequency band, and the antenna has higher radiation gain, achieves dual polarization and high polarization isolation at the same time, and is good in application prospect.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to an S-band dual-polarization base station antenna and base station for mobile 5G communication, especially to an ultra-low-profile base station antenna designed for China Mobile's 5G communication frequency band 2.55-2.65GHz. Background technique [0002] In the prior art, most of the base station antennas use crossed dipole antennas, but such antennas generally need to add reflective floors to ensure directional radiation performance. At present, there are also a variety of metasurface structures, such as high impedance surfaces (HIS ), artificial magnetic surface (ACM), etc. to reduce the profile of the antenna, but the profile of the antenna is still high; there are also measures to realize the use of microstrip patch antennas, but there are problems of narrow bandwidth and poor polarization isolation. [0003] After literature search, it was found that in Janua...

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Problems solved by technology

[0002] In the prior art, most of the base station antennas use crossed dipole antennas, but such antennas generally need to add reflective floors to ensure directional radiation performance. At present, there are also a variety of metasurface structures, such as high impedance surfaces (HIS ), artificial magnetic surface (ACM), etc. to reduce the profile of the antenna, but the profile of the antenna is still high; there are also measures to realize the use of microstrip patch antennas, but there are problems of narrow bandwidth and poor polarization isolation

[0003] After literature search, it was found that in January 2018, Huiqing Zhai et al. published "ABroadband Dual-Polarized Base Station Antenna With Anti-InterferenceCapability (a broadband dual-polarized base station antenna with strong anti-interference ability)", through the introduction of a working stop band, it has achieved high anti-interference ability, and has dual polarization, wide frequency band, high isolation and stable radiation performance, but The profile is high, and the feed structure is relatively complex

[0004] The search also found that in January 2018, Huiqing Zhai et al. published "A Low-Profile Dual-Polarized Dipole Antenna Using Wideband AMC Reflector (a low-profile dual-polarized dipole antenna using a broadband artificial magnetic surface reflector)", on the basis of crossed dipoles, if the artificial magnetic surface (AMC) achieves 54.8% broadband directional radiation performance, And the profile of 0.1%, but the design of AMC is more complicated, the profile contains a certain air layer, and there is still the problem of high profile

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