Millimeter wave substrate integrated waveguide dual-circularly polarized low sidelobe common caliber array antenna

Abstract

The invention provides a millimeter wave substrate integrated waveguide dual-circularly polarized low sidelobe common caliber array antenna. The antenna comprises a first metal copper cladding layer,a first medium layer, a second metal copper cladding layer, a second medium layer and a third copper cladding layer which are sequentially laminated from up to down. Two spaces generated by a 90-DEG coupler based on integrated waveguide and a common caliber parallel plate long seam array antenna are made to be orthogonal, for line polarization waves with phase difference 90 DEG, through an integrated substrate waveguide unequal power feed network, one-dimensional H-face low sidelobe forming for each line polarization self directional graph is carried out, through the circular polarization directional diagram synthesis principle, low sidelobe of the two orthogonal surfaces of a dual-circularly polarized directional graph is realized. The antenna is advantaged in that the one-dimensional forming technology is utilized to realize low sidelobe of two dual-circularly polarized orthogonal planes, realization difficulty of the feed network is simplified, a parallel plate long seam array modebased on the integrated waveguide is employed to realize low sidelobe dual-circularly polarized common caliber generation, and easy processing, low profile and high integration degree are realized.

Description

technical field [0001] The invention belongs to the technical field of moving target communication antennas, and more specifically relates to a millimeter-wave substrate-integrated waveguide double-circular polarization low-sidelobe common-aperture array antenna. Background technique [0002] The new generation of antennas must meet the characteristics of miniaturization and low profile, and must have strong anti-interference ability and high channel capacity. Compared with metal waveguides, substrate-integrated waveguides have the characteristics of high integration, low profile, low loss, and easy processing. For the design of planar circuits and array antennas in the millimeter-wave frequency band, substrate-integrated waveguides are a good choice. [0003] On the one hand, circularly polarized antennas have been widely used in the fields of satellite communication, ship-borne, airborne, missile-borne and other moving target communications due to their strong anti-interfe...

AI Technical Summary

Problems solved by technology

At present, there are generally two ways to design circularly polarized low-sidelobe array antennas: one is to add a circular polarizer to the online-polarized low-sidelobe antenna. This design method will increase the size of the antenna and cannot Simultaneously realize the characteristics of left-handed circular polarization and right-handed circular polarization; the second is to design an orthogonal feed network that satisfies low sidelobe characteristics, such as the traditional slot array or patch array antenna, but most of the current circular polarization is achieved in a certain Low sidelobe of a surface, literature A.B.Smolders and H.J.Visser, "Low side-lobe circularly-polarized phased arrays using a random sequential rotation technique," IEEE Trans.AntennasPropag.,vol.62,no.12,pp.6476–6481 ,Dec.2014. Using random sequence rotation technology to achieve low sidelobes in two orthogonal planes of circular polarization pattern through microstrip patch, but it is very difficult to achieve dual circular polarization

This is because the millimeter-wave wavelength is shorter, and its two-dimensional feed network will be more extremely complex

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