Flexible ultra-wideband MIMO antenna

Abstract

The invention provides a flexible ultra-wideband MIMO antenna, which is used for improving the isolation degree of the ultra-wideband MIMO antenna, expanding the frequency band range of the antenna, comprising a flexible thin film dielectric plate (1), a radiation unit (2) printed on the upper surface of the dielectric plate and a radiation floor (3) printed on the lower surface of the dielectricplate. The radiating unit (2) adopts a center symmetrical structure composed of four first radiating patches (21), wherein the first radiating patch (21) is formed by splicing a plurality of circulararc curves, and each first radiating patch (21) is connected with a feed line (4); the radiation floor (3) adopts a centrally symmetrical structure consisting of four second radiation patches (31), wherein the second radiation patch (31) is formed by splicing a first rectangular patch (311) and a second rectangular patch (312). The invention has the advantages of small volume, high isolation degree, wide frequency band range and easy equipment integration, and is suitable for the field of wireless communication technology.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a flexible ultra-wideband MIMO antenna, which is suitable for the technical field of wireless communication. Background technique [0002] In recent years, with the development of wireless communication technology, the problem of shortage of spectrum resources has become more and more serious, and ultra-wideband antennas play a certain role in solving the shortage of spectrum resources. An ultra-wideband antenna is an antenna with a relative bandwidth greater than 20%. The relative bandwidth refers to the main performance parameters of the antenna within the frequency range that can meet the design index requirements, such as input impedance, pattern, gain, main lobe width and side lobe electric field. Equally, in general, antenna performance parameters vary with frequency. At the same time, the rapid development of wireless communication technology requires more and more functio...

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Problems solved by technology

For example, the application publication number is CN 106282871 A, and the patent application titled "a compact four-element ultra-wideband MIMO antenna" discloses a compact four-element ultra-wideband MIMO antenna, which is provided with four identical radiating elements and four The same inverted L-shaped floor branches are respectively placed at the four corners of the dielectric board, and the long sides of the L-shaped floor branches coincide with the radiation unit to form a double-sided double microstrip line structure. There are two sets of floor gaps on the floor between adjacent radiating units. The S11 parameter is less than -10dB in the 3-10GHz frequency band, and the isolation is only about 15dB in the 3-10GHz frequency band. The antenna realizes miniaturization and ultra- Broadband characteristics, but the disadvantages are low isolation and narrow frequency range

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