High-isolation MIMO (multiple-input multiple-output) antenna for mobile terminal

Abstract

The invention discloses a high-isolation MIMO (multiple-input multiple-output) antenna for a mobile terminal. The high-isolation MIMO antenna for the mobile terminal comprises a dielectric substrate and two input end feeders; an antenna unit I and an antenna unit II with symmetrical structures are formed on the dielectric substrate; an excitation port I is formed in the antenna unit I; an excitation port II is formed in the antenna unit II; two G-shaped radiating units which are symmetrical about the center line of the dielectric substrate are printed on the front structure of the dielectric substrate; a floor is printed on the back side of the dielectric substrate; the input end feeders are connected with the G-shaped radiating units; two branch knots with different lengths are arranged on the G-shaped radiating units; one branch knot adopts an increasingly wide trapezoidal structure, and a triangular structure is removed from the bending position of the other branch knot; and rectangular notches are formed at the connection positions of the G-shaped radiating units and the feeders. The high-isolation MIMO antenna for the mobile terminal effectively improves the isolation of the antenna units by combining floor branches and floor gaps so as to reduce mutual coupling caused by floor surface current.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a high-isolation MIMO antenna for a mobile terminal. Background technique [0002] With the rapid development of wireless communication technology, consumers have higher and higher requirements for the type and quality of wireless communication services. Scarce spectrum resources have become a bottleneck for communication development, and MIMO (Multiple-Input Multiple-output, multiple-input Multi-output) technology can reduce channel fading by using a transceiver system composed of multiple transmitting antennas and receiving antennas without increasing the transmission power and bandwidth, and double the frequency utilization and system capacity. As the antenna part of the MIMO mobile terminal system, it is necessary to solve the contradiction between limited space and placement of multiple antennas, the contradiction between isolation between multiple antennas and ...

AI Technical Summary

Problems solved by technology

However, the above decoupling methods are only suitable for narrow-band working bandwidth, and most of the structural designs are complex, and it is difficult to achieve the design requirements of small size, broadband / multi-frequency, and high isolation

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