Planar multi-port multi-band common ground small spacing high isolation mimo antenna
A multi-port, multi-band technology, applied in antenna coupling, resonant antenna, feed at the end of slender active unit, etc., can solve the difficulty of increasing the design, the influence of the radiation performance of the antenna unit, and the research of high isolation MIMO antenna Less problems, to achieve the effect of reducing mutual influence, simple production, and improving impedance matching
Active Publication Date: 2021-09-17
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
However, because the neutralization line is usually directly connected to the feeder or radiator of the antenna unit, it often affects the radiation performance of the antenna unit itself. It needs to be considered comprehensively when loading, which increases the difficulty of design.
[0011] So far, among the researches published at home and abroad, there are few researches on multi-band common-ground high-isolation MIMO antennas
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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0042] The planar multi-port multi-band multi-band common ground small spacing high isolation MIMO antenna of the present invention, such as figure 1 As shown, it includes a dielectric substrate 1, a first monopole antenna 2, a second monopole antenna 3, a new non-connected neutralization structure 4, a ground plate 5, a first feed port 6, a second feed port 7, The first parasitic unit 8, the second parasitic unit 9 and the floor stub 10 are made by printed circuit board technology.
[0043] The dielectric substrate 1 is a printed circuit board, selected from Rogers RO4350, with a relative permittivity of 3.66, a horizontal length of 66.6 mm, a vertical width of 30 mm, and a thickness of 1.524 mm.
[0044] The excitation mode of the first monopole antenna 2 and the second monopole antenna 3 is lumped port excitation, the two antennas have the same structure ...
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The invention discloses a planar, multi-port, multi-band, common-ground, small-pitch, high-isolation MIMO antenna, which includes a dielectric substrate, a first monopole antenna and a second monopole antenna that are left and right symmetrical on the front of the dielectric substrate; a ground plate on the back of the dielectric substrate, and The first parasitic unit and the second parasitic unit are left-right symmetrical; in order to reduce the mutual coupling between the antenna units due to the surface wave of the ground plane, a defective ground structure is designed in the middle of the ground plane, and the distribution of the current on the ground plane surface is changed to obtain slow Waveform and band-stop characteristics to reduce port coupling between antenna elements. At the same time, a ground stub is loaded in the middle of the ground plate, and a new coupling path is introduced to offset the original coupling, so as to further improve the isolation between antenna elements. Finally, the present invention chooses to load a new non-connected neutralization structure on the microstrip lines of the two antenna units to reduce the impact of space radiation waves on the antenna units and improve the isolation of the three frequency bands.
Description
technical field [0001] The invention belongs to the technical field of microwave antennas, and relates to a multi-band high-isolation MIMO antenna, in particular to a planar multi-port multi-band common-ground small-spacing high-isolation MIMO antenna based on 5G communication. Background technique [0002] With the rapid development of social science and technology, people's daily transmission data volume has increased exponentially, and people's demand for mobile communication speed is increasing day by day. The fifth-generation mobile communication (5G for short) with the characteristics of high speed, low power consumption and low delay has become the main research and development hotspot of global communication. The realization of 5G will make breakthroughs in many technical fields such as smart medical care, artificial intelligence, driverless technology, and VR. [0003] In 2019, the Ministry of Industry and Information Technology of China released the 5G communicati...
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IPC IPC(8): H01Q1/52H01Q9/04H01Q9/30
Inventor 吴永乐王雯王卫民
Owner BEIJING UNIV OF POSTS & TELECOMM