Hybrid-feeding slot array antenna

Abstract

The invention relates to and discloses a hybrid-feeding slot array antenna. A substrate integrated waveguide and a traditional rectangular metal waveguide hybrid feeding mode are employed, a radiationarray is a substrate integrated waveguide slot array, a power division and differential network is of a waveguide single-layer planar structure and is arranged below the radiation array, a feeding port is arranged in a back surface of the antenna, and antenna aperture is not occupied. The antenna has the advantages of high aperture utilization ratio, high grain, relatively wide bandwidth, low profile and the like.

Description

technical field [0001] The invention belongs to the field of radar antennas, and relates to a slot array antenna, which adopts a substrate integrated waveguide and traditional rectangular metal waveguide hybrid feeding technology. Background technique [0002] Traditional waveguide slot array antennas are widely used in the microwave and millimeter wave fields, but they are generally multi-layer waveguide structures, which require CNC high-speed milling machines to be machined, and then welded by vacuum welding or diffusion welding. Generally, the processing cost is relatively high. Substrate integrated waveguide (SIW) technology is a new waveguide structure proposed in recent years that can be integrated in a dielectric substrate with low radiation and high power capacity. Its propagation characteristics are similar to rectangular metal waveguides. Due to The whole structure is completely composed of metallized through-hole arrays on the dielectric substrate, so this struct...

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Problems solved by technology

[0002] Traditional waveguide slot array antennas are widely used in the field of microwave and millimeter waves, but they are generally multi-layer waveguide structures, which require CNC high-speed milling machines to be machined, and then welded by vacuum welding or diffusion welding. Generally, the processing cost is relatively high

Substrate integrated waveguide (SIW) technology is a new waveguide structure proposed in recent years that can be integrated in a dielectric substrate with low radiation and high power capacity. Its propagation characteristics are similar to rectangular metal waveguides. Due to The whole structure is completely composed of metallized through-hole arrays on the dielectric substrate, so this structure can be accurately realized by PCB technology, with light weight and low processing cost, but the substrate integrated waveguide (SIW) is difficult to make multiple The layer structure, the feed network and the antenna radiation front are on the same layer, which makes the surface utilization of the substrate integrated waveguide antenna not high.

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