Decoupling structure of broadband binary array antenna

Abstract

The invention relates to the field of antennas, and discloses a decoupling structure of a broadband binary array antenna. A coplanar isolation wall is arranged at the geometric center of an upper substrate, and two rectangular radiation patches are symmetrically arranged at the two sides of the coplanar isolation wall; a low dielectric constant dielectric substrate is connected with the upper substrate; and a lower layer substrate is connected with the low dielectric constant dielectric substrate, and the two rectangular metal patches are symmetrically arranged on the lower layer substrate. The coplanar isolation wall is arranged between the upper-layer microstrip antenna units, and can block the propagation path of a direct coupling electric field between the microstrip antenna array units, so that the purpose of reducing the mutual coupling between the microstrip antenna array units is achieved; and the isolation wall blocks a propagation path of a direct coupling electric field between the lower-layer microstrip antenna units, so that the coupling of the broadband microstrip antenna array is reduced.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a decoupling structure of a broadband binary array antenna. Background technique [0002] The existing field pair cancellation decoupling technology usually needs to redesign a decoupling network suitable for the original antenna array, or needs to arrange parasitic elements with a specific structure at a specific position of the antenna array, so this technology has extremely high requirements on the type of antenna array elements , the technique of loading ground stubs changes the structure of the antenna floor, thus changing the radiation characteristics of the antenna. [0003] The built-in decoupling network requires a separate design of a feed network. Obviously, this technology is not suitable for antenna arrays that require a simple feed structure, and increases the difficulty of antenna design. [0004] For the electromagnetic bandgap structure in the bandstop filtering method, ...

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Problems solved by technology

Defective ground structures usually require slots in the ground plate of the antenna, so this structure will increase the anti-phase radiation of the antenna

The metamaterial decoupling technology is extremely sensitive to the direction of the radiation wave of the antenna array, and the frequency selective surface will increase the profile height of the antenna, which obviously does not meet the miniaturization requirements of the antenna

[0005] In addition, the decoupling technology of the antenna array mentioned above can basically only achieve the decoupling of the narrowband antenna array, and it is difficult to meet the decoupling technology of the broadband array antenna.

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