Broadband dual-mode multi-step horn antenna

A multi-step and step technology, applied in the field of feed antenna, can solve the problem of narrow operating bandwidth of the horn, and achieve the effects of low manufacturing difficulty and cost, simple structure and high level of equalization
CN113161750APending Publication Date: 2021-07-23HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2021-07-23

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Abstract

The invention provides a broadband dual-mode multi-step horn antenna. The antenna comprises a multi-step circular horn and a circular waveguide-rectangular waveguide conversion structure. The circular horn comprises a waveguide section, six steps and a radiation section. The waveguide conversion structure comprises three stages of cavities. The shape of the waveguide conversion structure is a rounded square, the waveguide section is cylindrical, and the bottom surface of the cylindrical shape is an inscribed circle of the rounded square. The waveguide section is connected with a first cavity. An FBP220 flange structure is arranged on the periphery of a third cavity of the waveguide conversion structure to connect a rectangular waveguide conversion structure for feeding. According to the invention, high gain and low sidelobe are obtained within 17-25GHz, the relative bandwidth is about 38%, the working bandwidth is far greater than the working bandwidth of a traditional multimode horn, and the working bandwidth is close to the working bandwidth of a common corrugated horn; and under the condition of the same performance as a corrugated horn, the structure is simpler, and the manufacturing difficulty and the manufacturing cost are lower.
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Description

technical field

[0001] The invention belongs to the technical field of feed antennas, and in particular relates to a broadband dual-mode multi-step horn antenna. Background technique

[0002] The horn antenna is a widely used antenna, which has the advantages of simple structure, wide frequency band, large power capacity, and convenient adjustment and use. However, the sidelobe levels of horn antennas are usually high. Generally speaking, for feeds with low sidelobe level requirements, corrugated horns are often used, such as satellite antenna feeds and reflector antenna feeds. But the length and depth of the corrugation directly depend on the operating frequency, and as the operating frequency increases, the required corrugation size becomes very small. Therefore, the manufacture of high-frequency corrugated horns has become increasingly difficult and expensive.

[0003] At the same time as the birth of the corrugated horn, Potter proposed a dual-mode horn. This kind of...

Claims

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