Hexagonal substrate integrated waveguide slot antenna

Abstract

The invention discloses a hexagonal substrate integrated waveguide slot antenna, which can be used for realizing in-phase feed of four radiation slots. The antenna comprises a medium substrate, an upper surface metal layer and a lower surface metal layer, wherein a T-shaped ground coplanar waveguide input end is etched on the upper surface metal layer; four parallel rectangular radiation slots are etched on the lower surface metal layer; the T-shaped ground coplanar waveguide input end crosses a first rectangular radiation slot; the distance between a bent part of the T-shaped ground coplanar waveguide input end and a reference line is one third of the distance between the cavity center of a hexagonal substrate integrated waveguide cavity and the reference line; TM310 mode field distribution in the hexagonal substrate integrated waveguide cavity close to a central working frequency can be excited, and a low-order resonant mode inside the hexagonal substrate integrated waveguide cavity is restrained by using a central hexagonal through hole array, so that in-phase feed of four parallel rectangular radiation slots is realized. The antenna is suitable to be popularized and applied in the technical field of antennae.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave antennas, in particular to a hexagonal substrate integrated waveguide slot antenna. Background technique [0002] The traditional metal waveguide cavity slot antenna has the advantages of narrow main lobe width, high radiation efficiency, high gain and fixed beam pointing, etc., and is widely used in microwave and millimeter wave radar and communication systems. A complete metal waveguide cavity slot antenna system is composed of multiple metal waveguides. Slits are etched on the wall of some of the waveguides whose terminals are short-circuited to form a radiation unit, and the other part of the waveguides is used as a feed network. However, the traditional metal waveguide cavity slot antenna also has problems such as difficult design, large volume, heavy weight, high cost, and difficulty in processing and planar integration. [0003] The propagation characteristics of the ...

AI Technical Summary

Problems solved by technology

However, the resonance mode excited by the existing hexagonal substrate integrated waveguide slot antenna is generally low, resulting in fewer radiation slots. Generally, there is only one slot, and it is impossible to feed multiple radiation slots in the same phase, and the excitation of high-order modes is difficult and difficult. Susceptible to interference patterns, making it difficult to obtain high gain and ideal pattern

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