Compact and high-isolation dual-port multiple-input multiple-output (MIMO) antenna

Abstract

The present invention relates to a compact and high-isolation dual-port MIMO antenna characterized by comprising an antenna array (1) comprising a first antenna unit (A) and a second antenna unit (B) which are in mirror symmetry, a rectangular dielectric substrate (2), a 50-Ohm feeder line (3), an isolation neutral line (4) and a metal grounding plate (5) on the reverse side of the dielectric substrate, wherein the two circular antenna units (A and B) are located on the upper surface of the dielectric substrate (2) and are in mirror symmetry about the center axis, and the neutral line (4) is located between the two circular antennas and is in mirror symmetry about the center axis. The antenna is compact in structure, and the distance between the antenna units is only 2.2 mm, so that the miniaturization is realized, and the space is saved. The coupling degree between the antenna units is reduced by utilizing a crossed current neutral line, and the isolation degrees within a whole work frequency band are all less than -24 dB, so that the antenna has the high isolation degree.

Description

technical field [0001] The invention relates to a MIMO antenna used in the field of wireless communication, in particular to a compact high-isolation dual-port MIMO antenna. Background technique [0002] With the increasing needs of users, the transmission of mobile communication gradually needs to become more reliable, more efficient and higher speed. However, the available frequency resources of the current mobile communication system have become very limited and precious, so it is no longer possible to increase the channel capacity and reliability of the system through too many spectrums. As one of the key technologies in 4G communication, MIMO technology can double the channel capacity of the communication system without sacrificing additional spectrum resources during signal transmission, and can also improve channel reliability and reduce errors. code rate etc. [0003] A MIMO system usually includes a space-time codec module, an analog-to-digital / digital-to-analog c...

AI Technical Summary

Problems solved by technology

However, the available frequency resources of the current mobile communication system have become very limited and precious, so it is no longer possible to increase the channel capacity and reliability of the system through too much spectrum.

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