Millimeter wave circular conical surface conformal integrated waveguide slot array antenna

Abstract

The invention belongs to the technical field of conformal antennas, and provides a millimeter wave circular conical surface conformal integrated waveguide slot array antenna. The antenna is arranged on a metal circular cone carrier surface, and is composed of a lower metal copper-clad layer, a dielectric substrate layer and an upper metal copper-clad layer which are laminated in sequence from bottom to top; the dielectric substrate layer is internally provided with a plurality of plated through holes arranged into a quadrangle so as to form a substrate integrated waveguide; and the width of the substrate integrated waveguide WPhi and the semidiameter r of the cross section of a metal circular cone carrier meet the relational expression as shown in the description. The change of propagationcharacteristics caused by geometric characteristics is eliminated through the width change of the integrated wave guide, so that circular conical surface conformal substrate integrated waveguide propagation characteristics realize the conformal effect of plane and cylindrical surface.

Description

technical field [0001] The invention belongs to the technical field of conformal antennas, and in particular relates to a millimeter wave conical surface conformal substrate integrated waveguide slot array antenna. Background technique [0002] A conformal antenna is an antenna that is consistent with the shape of an object. It must conform to the shape of a predetermined object. These shapes can be certain parts of an airplane, a high-speed train, or other means of transportation; Antennas that blend in with object structures without additional burdens. The substrate integrated waveguide structure proposed in recent years almost maintains the advantages of microstrip and waveguide. On the one hand, it has the low insertion loss and low leakage radiation characteristics of the waveguide structure, and on the other hand, it has the low Sectional characteristics; provide an opportunity for the realization of millimeter-wave conformal antennas. [0003] In recent years, in th...

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Problems solved by technology

[0005] As mentioned above, the equivalent circuit and design method of the traditional planar substrate integrated waveguide slot array antenna can be directly applied to the conformal design of the cylindrical surface; however, the conformal design of the conical surface is essentially different from the conformal design of the cylindrical surface and the plane design , due to the special geometric characteristics of the conical surface, the cross-section of the conformal substrate integrated waveguide will change in the propagation direction, and then its propagation characteristics will change with the position on the conical surface. The propagation characteristics will lead to the failure of the equivalent circuit of the traditional planar substrate integrated waveguide slot array antenna. The traditional planar design method cannot be directly used in the conformal design of the conical surface, such as Figure 5 shown

Document "Z.A and Y.J.Cheng, "Substrate integrated antennaconformal to 3D-printing cone," 2016IEEE MTT-S International MicrowaveWorkshop Series on AdvancedMaterials and Processes for RF and THzApplications (IMWS-AMP), Chengdu, 2016, pp.1-4." In this paper, a conical surface conformal substrate integrated waveguide slot array antenna is designed directly by using the traditional planar design method. Because the propagation characteristics of the conical surface change are not corrected, the simulation and test results of its S parameters and pattern are different. big error

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