Broadband dual-polarized high-density and high-isolation array antenna loaded with composite isolators

Abstract

The invention relates to a broadband dual-polarized high-density and high-isolation array antenna loaded with composite isolators and belongs to the field of a base station array antenna. The antennacomprises a metal floor; two + / -45-degree wideband dual-polarized crossed dipole antennas are disposed in parallel on the metal floor; each + / -45-degree wideband dual-polarized crossed dipole antennacomprises four radiation patches and two crossed dipole T-type micro-strip feeders, and two SMP (Symmetrical Multi-Processing) connectors which are respectively connected with the T-type micro-strip feeders; the composite isolators are disposed on the peripheries of the two + / -45-degree wideband dual-polarized crossed dipole antennas; each composite isolator includes four dielectric substrates which are respectively disposed on the peripheries of the + / -45-degree wideband dual-polarized crossed dipole antennas to encircle into a square; a metal wall is disposed on each dielectric substrate, away from one surface of the + / -45-degree wideband dual-polarization crossed dipole antennas; and a metal strip is disposed on each dielectric substrate, close to one surface of the + / -45-degree wideband dual-polarization crossed dipole antennas.

Description

technical field [0001] The invention belongs to the field of base station array antennas, and relates to a broadband dual-polarization, high-density, and high-isolation array antenna loaded with a composite isolator. Background technique [0002] As the sensing organ of the communication network, the base station antenna plays an increasingly important role in the network, and is the key to the construction of the base station. In recent years, broadband dual-polarized antennas and their arrays have been widely used as base station antennas. On the one hand, the wide impedance bandwidth can meet the reality of long-term coexistence of multiple mobile communication technology standards; on the other hand, good dual-polarization characteristics can effectively resist multipath fading and improve channel capacity. However, for MIMO large-scale array antennas, it is required to arrange a large number of antenna elements under limited space resources, so that the distance betwee...

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Problems solved by technology

In these methods, the size of the metal back cavity and metamaterial back cavity is too large, which is not suitable for high-density arrays with very close spacing between array elements, and the decoupling surface needs to be placed directly above the antenna element, which improves the overall profile of the system high

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