Shorting pin loading-based cavity-backed slot antenna of substrate integrated waveguide

Abstract

The invention discloses a shorting pin loading-based cavity-backed slot antenna of a substrate integrated waveguide. The antenna comprises a dielectric substrate body, a first shorting pin group, a second shorting pin group, a third shorting pin group, a feed joint and a slot structure, wherein the dielectric substrate body has a surface and a back surface; the feed joint is in end connection withone side edge of the dielectric substrate body, and is connected with the surface and the back surface of the dielectric substrate body; the slot structure is a slit formed in the back surface of thedielectric substrate body, and is a radiating of the antenna; the first shorting pin group, the second shorting pin group and the third shorting pin group longitudinally pass through the surface andback surface of the dielectric substrate body; the first shorting pin group encloses a waveguide cavity along the outer edge of the dielectric substrate body, and a first-stage cavity film, two second-order cavity films and a third-order cavity film are formed in the cavity; the second shorting pin group and the third shorting pin group are disposed inside the cavity, so that the first-stage cavity film and the two second-order cavity films are coupled to the third-order cavity film, and a four-resonance broadband property can be realized.

Description

technical field [0001] The present invention relates to the field of radio, more specifically, to a cavity-backed slot antenna based on a substrate-integrated waveguide loaded with a shorting pin. Background technique [0002] Substrate integrated waveguide technology is widely used in microwave communication systems and millimeter wave communication systems. This technology has the advantages of low profile, low cost, low loss, and easy compatibility with planar circuits. Realizing the cavity-backed slot antenna on the substrate integrated waveguide can make the antenna have the advantages of low profile, easy processing, and planarization. At the same time, it can also make the radiation pattern stable in the working frequency band and have a good front-to-back ratio. [0003] However, the existing wideband cavity-backed slot antenna based on substrate integrated waveguide is generally very narrow, only about 1.7%. With the development of communication technology, the com...

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Problems solved by technology

[0004] Broadband substrate-integrated waveguide cavity-backed slot antenna generally adopts additional parasitic patch or slot structure, the structure is more complex, the profile of the antenna is improved, and the size is larger, which is not conducive to installation

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