An End-fed Wide Bandwidth Beam Ridge Horn

Abstract

The invention discloses an end-feedback broadband wide beam ridge horn. The end-feedback broadband wide beam ridge horn comprises a rectangular horn shell (1), a trapezoidal waveguide ridge (2) and a coaxial connector (3), wherein the trapezoidal waveguide ridge (2) is arranged on the inner wall of the rectangular horn shell (1) and is fixedly connected to the rectangular horn shell (1) and the coaxial connector (3); the rectangular horn shell (1) and the trapezoidal waveguide ridge (2) compose a ridge waveguide structure. By utilizing the characteristic that the ridge waveguide structure is small in structure, the caliber of the waveguide is adjusted, the distance from the trapezoidal waveguide ridge to the inner wall of the rectangular horn shell is changed, and the distance between the trapezoidal waveguide ridge and the coaxial connector is adjusted; matching between impedance 50 ohm of a coaxial line input end and impedance 377 ohm of free space wave at the output end is realized by utilizing ridge-shaped conversion type waveguide output by the end face and coaxial conversion. The end-feedback broadband wide beam ridge horn can realize broadband optimal matching and meet with a wide-angle coverage requirement, an input standing wave VSWR is less than 1.5 within a frequency range of a nearly octave, and a directional diagram can meet with an antenna scanning need.

Description

technical field [0001] The invention relates to a radar antenna structure, in particular to an end-fed wide bandwidth beam ridge horn. Background technique [0002] The beam width of the radiation unit in the two-dimensional phased array system radar is small, and the matching is difficult. The quality of its performance will directly affect the performance of the radar antenna. The wide bandwidth angle matching of the radiating element creates conditions for realizing the radar with low sidelobe and small loss of scanning gain. [0003] According to the requirements of the antenna array on the telecommunication performance and structural size of the radiating unit, that is, the diameter of the E-plane of the horn is less than 56mm, and the H-plane is less than 68mm. Conventional standard waveguide dimensions under this caliber cannot meet the requirements. [0004] Existing broadband horn antennas include standard waveguide horns and broadband ridge horns. Standard wavegu...

AI Technical Summary

Problems solved by technology

Conventional standard waveguide dimensions under this caliber cannot meet the requirements

[0004] Existing broadband horn antennas include standard waveguide horns and broadband ridge horns. Standard waveguide horns can usually meet broadband matching. However, due to the limitation of their structural size, the broadside of the waveguide cannot be compressed, so standard waveguide horns cannot meet the requirements of use.

Broadband ridge horns are usually used in the field of broadband ultra-wideband, and their wide beam characteristics cannot meet the requirements of use

[0005] Therefore, the existing technology cannot meet the requirements of ensuring small structure size and wide beam width

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