A millimeter wave array antenna based on field cancellation decoupling

Abstract

This invention relates to the field of millimeter-wave wireless communication technology, providing a millimeter-wave array antenna based on field cancellation decoupling. The antenna comprises a first substrate, a second substrate, a ground plane, four patches, four rectangular slotted structures, and a 1-to-4 T-type feed structure. The patches and slotted structures are on the first substrate, the 1-to-4 T-type feed structure is on the second substrate, and the ground plane is on the lower surface of the second substrate. Through this structure, the patches and rectangular slotted structures are simultaneously excited, generating a new electric field between adjacent patches to cancel the coupling effect, reduce mutual coupling, improve port isolation, and solve the mutual coupling problem of high-density integrated arrays. Its operating frequency covers the 24.25GHz-27.5GHz band, with stable gain exceeding 7.5dBi, good radiation directivity, and high polarization purity. Through optimization of parasitic elements, flexible decoupling is possible, and the structure is simple and easy to manufacture. The 1-to-4 T-type feed structure facilitates bandwidth expansion and integration of active front-ends. The substrate uses Rogers 4350B, which offers stable performance.

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