SIW-based single-ridge ultra-wideband H-plane horn antenna

Abstract

The invention discloses an SIW-based single-ridge ultra-wideband H-plane horn antenna, and aims to solve the technical problem that in the prior art, a substrate integrated waveguide ridged horn antenna is relatively complex in structure. The antenna comprises a dielectric substrate, an SIW structure, an H-plane horn antenna, a ridge structure and a feed coaxial line, the SIW structure and the H-plane horn antenna are arranged on the two sides of the central axis of the dielectric substrate, the ridge structure is arranged on the central axis of the dielectric substrate, and the feed coaxial line is arranged on the side, close to the SIW structure, of the ridge structure; and the SIW structure and the H-plane horn antenna comprise metalized through holes symmetrically distributed relative to the central axis of the dielectric substrate and metal layers on the upper surface and the lower surface of the dielectric substrate, and the ridge structure comprises a plurality of connected metal blocks. According to the invention, the equivalent characteristic impedance of the SIW can be effectively reduced, the cut-off frequency of a main mode is reduced, the working bandwidth of the horn antenna is increased, and the antenna structure is simplified.

Description

technical field [0001] The invention relates to an SIW-based single-ridge ultra-wideband H-plane horn antenna, belonging to the technical field of broadband antennas. Background technique [0002] The horn antenna can work in a wide frequency band, has a stable radiation lobe pattern and a simple structure, so the horn antenna has been widely used in various wireless communication occasions. However, the traditional horn antenna has a large size and a high profile, which is not suitable for planar integrated circuits. The substrate integrated waveguide (SIW) structure is a planar waveguide structure similar to a rectangular waveguide. It is formed by connecting the metal surfaces on the upper and lower surfaces of the dielectric substrate through metal vias arranged periodically in the dielectric substrate. The metal vias arranged in a positive manner are equivalent to the side walls of the rectangular waveguide, and the SIW structure has the characteristics of miniaturizat...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the complex problem of substrate-integrated waveguide and ridged horn antenna structure in the prior art, the present invention proposes a SIW-based single-ridge ultra-wideband H-plane horn antenna. Through the design of the ridged structure and its loading position, Effectively reduces the equivalent characteristic impedance of SIW, reduces the cut-off frequency of the main mode, increases the operating bandwidth of the horn antenna, and simplifies the antenna structure

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