Decoupling structure between adjacent rectangular patches in dual-band antenna array

Abstract

The invention discloses a decoupling structure between adjacent rectangular patches in a double-frequency antenna array. The decoupling structure comprises a dielectric substrate, metal grounding plates arranged on the lower surface and the upper surface of the substrate respectively and two symmetrical double-frequency metal patches. Two feed probes are arranged on the metal grounding plate and penetrate through the dielectric substrate to be in contact with the two patches respectively; a decoupling branch unit and a short-circuit probe unit are arranged between the two patches, decoupling of space waves between the two patches is achieved, and a short-circuit probe is arranged on the metal grounding plate and penetrates through the dielectric substrate to make contact with the decoupling branch unit; U-shaped grooves are symmetrically etched in the two patches and used for activating the other mode; and a defected ground structure is etched on the metal grounding plate and is used for preventing current from flowing from one patch to the other patch. The patch antenna array has the advantages of being low in profile, low in manufacturing cost, simple in structure and the like, the original advantages that the decoupling structure is low in profile, easy to manufacture and the like are kept, the original radiation performance of the antenna is not damaged, and meanwhile a good decoupling effect is obtained.

Description

Technical field [0001] The invention belongs to the technical field of antenna decoupling, and particularly relates to a decoupling structure between adjacent rectangular patches in a dual-frequency antenna array. Background technique [0002] The patch antenna array is one of the most typical antenna forms in the MIMO system due to its low profile, easy integration and diversified performance. Under such a development trend, it is necessary to reduce the mutual coupling between the patch antenna units. Research is endless. [0003] Some typical technologies are: Defective Ground Structure (DGS), Electromagnetic Band Gap Structure (EBG), introduction of neutralization line, decoupling network method, decoupling using resonant structure, etc. Most of the decoupling methods are aimed at single-frequency patch antenna arrays, but with the increase in application requirements and technical improvements, dual-frequency antenna arrays have gradually become the development trend and requ...

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Problems solved by technology

Most of the decoupling methods are for single-frequency patch antenna arrays, but with the improvement of application requirements and technology, dual-frequency antenna arrays have gradually become the development trend and requirements. The literature "Dual-Band Metasurface-Based Decoupling Method for Two Closely Packed Dual-Band Antennas" proposes a method of decoupling dual-band patch antennas using metasurface materials. This metasurface material is located above the patch antenna and destroys the original low-profile characteristics of the patch antenna. , which increases the size of the patch antenna, so it is of practical significance to develop a decoupling method that can effectively improve the isolation and maintain the compactness of the original antenna array

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