Dual-port ultra-wideband MIMO antenna capable of realizing wideband decoupling

Abstract

The invention discloses a dual-port ultra-wideband MIMO (Multiple Input Multiple Output) antenna capable of realizing wideband decoupling, and belongs to the technical field of antennas. The antenna comprises a rectangular dielectric substrate, two monopole antenna units which are arranged on the front surface of the dielectric substrate in a bilateral symmetry manner, and a floor arranged on the back surface of the dielectric substrate, microstrip line feed is adopted, radiation is carried out through two hexagonal monopole antennas with the same shape, a T-shaped parasitic branch knot protrudes on an antenna floor and is used for achieving the high isolation characteristic between antenna units, in addition, a complementary split resonance ring (CSRR) is etched on the floor and is used for enabling the antenna to generate a resonance point in a high frequency band (10.6 GHz), and therefore, the high-frequency band isolation of the antenna unit is improved, and the purpose of broadband decoupling of the UWB-MIMO antenna is achieved. The coupling degree of the UWB-MIMO antenna in a wide frequency band (3.4-12 GHz) can be effectively reduced, and the UWB-MIMO antenna has the advantages of being low in profile, small in size, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a dual-port ultra-wideband MIMO antenna capable of realizing broadband decoupling. Background technique [0002] In the 1990s, Telatar and Foschini of Bell Laboratories first proposed the idea of ​​using multi-antenna multiplexing theory to improve channel capacity, which led to the birth of MIMO (multiple-input multiple-output) communication technology. MIMO communication technology, that is, multiple-input multiple-output technology, uses multiple antennas at the transmitter and receiver to transmit and receive signals at the same time, thereby suppressing channel fading and improving the efficiency of spectrum use. From the perspective of Shannon's theorem, the traditional SISO system only uses one antenna at the receiving end, so the channel capacity will be greatly limited during communication, while the MIMO technology uses multiple unrelated signal paths based...

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Problems solved by technology

However, UWB technology also has defects in practical applications: UWB systems have hundreds of channel paths, and there will be multipath fading problems. At the same time, the signal will also generate intersymbol interference due to the short time, which will affect data transmission.

[0008] In some existing UWB-MIMO antenna designs, the decoupling frequency band is generally narrow, and the physical size of the antenna is large, and there are few UWB-MIMO antenna decoupling research on ultra-wideband

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