Low-profile series-parallel combined feed waveguide array antenna

Abstract

The invention discloses a low-profile series-parallel combined feed waveguide array antenna, which relates to the technical field of antennae. The low-profile series-parallel combined feed waveguide array antenna comprises a metal substrate, the metal substrate comprises a radiation layer, a coupling layer and a feed network layer which are sequentially stacked according to one direction, the radiation layer comprises a plurality of 2*2 radiation units, the coupling layer comprises a coupling cavity, the feed network layer is provided with a feed port, and an equal-ratio power divider, an unequal power divider I, an unequal power divider II and a series-feed auxiliary network are sequentially arranged from a feed port of the feed network layer to the coupling layer. The circular bead radiation holes of the 2X2 radiation unit adopt an asymmetric chamfering mode, so that side lobe level suppression is facilitated, and low side lobe is easy to realize; a novel radiation unit and a novel mixed feed mode with parallel feed as a main mode and series feed as an auxiliary mode are adopted, so that the problems of high profile in a power division parallel feed type waveguide array antenna, high difficulty in designing a non-integer power aperture array feed network, difficulty in realizing low side lobe and the like are solved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a low-profile serial parallel feeder waveguide array antenna. Background technique [0002] Waveguide array antennas are generally divided into waveguide wall slot antennas in the form of series feeding and conventional arrays in the form of power division and parallel feeding. [0003] The waveguide wall slot antenna has the characteristics of easy control of the mouth surface field distribution, high antenna aperture efficiency, stable performance, simple and compact structure, high strength, and convenient installation, and it is easy to realize the advantages of narrow beam, low sidelobe and even ultra-low sidelobe. The bandwidth is narrow. [0004] The conventional waveguide array in the form of power division parallel feeding not only has the advantages of high antenna aperture efficiency, stable performance, compact structure, high strength, and high reliability, but als...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a low-profile series-parallel combined feed waveguide array antenna to solve the problem of high profile and non-integer power of 2 aperture array feed network design difficulty in the power division parallel feed form waveguide array antenna. Difficult to achieve low sidelobe and other issues

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