Miniaturized high-isolation circularly polarized diversity antenna based on dual-mode resonance

Abstract

The invention provides a miniaturized high-isolation circularly polarized diversity antenna based on dual-mode resonance. The miniaturized high-isolation circularly polarized diversity antenna comprises a metal floor, a dielectric layer and two groups of radiation units which are arranged in a mirror symmetry manner, wherein each group of radiation units comprises a radiation patch, a short circuit component group and a feed probe; the feed probe feeds power to the radiation patch, and the radiation patch is connected with the metal floor through the short circuit component group. The dielectric layer is located between the metal floor and the radiation patch; the short circuit component group is used for shielding the coupling between the two radiation patches and maintaining the resonant frequencies of a TM11 mode and a TM31 / 13 mode excited after the radiation patches are amplified by two times to be unchanged; the radiation patch is provided with a hollow-out groove, and the hollow-out groove is used for gathering part of electric fields of a TM11 mode and a TM31 / 13 mode. And the two groups of radiation units in mirror symmetry excite left-handed and right-handed circularly polarized waves respectively to form a diversity antenna. The working frequency of the radiation patch is the working frequency amplified by two times, and the isolation degree between the two radiation units is high, so that the diversity antenna can be made smaller under the condition that the working performance is not influenced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a miniaturized high-isolation circular polarization diversity antenna based on dual-mode resonance. Background technique [0002] In recent years, with the rapid development of modern wireless communication systems, modern wireless mobile communication systems, especially terminal antennas, need to have reliable and stable electromagnetic wave radiation performance and higher communication capacity to further meet the needs of large data volume services and reliable transmission requirements. Circular polarization diversity antennas can improve the power capacity of traditional antennas, and solve the problem of weak received signals caused by misalignment of the polarization of traditional antennas and the interference of reflected waves during signal transmission. However, circular polarization diversity antennas often require good isolation between ports, and t...

AI Technical Summary

Problems solved by technology

[0004] However, technology 1 adopts a multi-layer structure, the profile of the antenna is high, and the circular polarization diversity realized by mechanical rotation will also be greatly restricted in practical applications, such as insufficient rotation accuracy and deviation, and mechanical rotation reduces the use of the antenna. life expectancy

Both technology 2 and technology 3 contain an air layer in structure, and the overall structure of the antenna requires a complicated and stable fixing device, and the profile is high. In addition, the diode control form adopted in technology 2 not only makes the antenna structure complicated, but also requires many materials and processing. Difficulty, increase the production cost of the antenna

Technology 1, Technology 2, and Technology 3 antennas not only have a high profile, but also have large lateral dimensions, which is not conducive to the application of small-size antennas

When realizing circular polarization diversity characteristics, there are deficiencies in use such as high antenna profile, large lateral size, and strong coupling interference between ports.

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