High Gain Tapered Slot Line Antenna Loaded by Dielectric Air Hole

Abstract

The invention discloses a medium air hole loaded high-gain gradually changed slot line antenna. The antenna comprises a dielectric substrate. Two metal patches are arranged on the front surface of the dielectric substrate. A gradually changed slot line with a horn-shaped opening is formed between the two metal patches. Two ends of the horn-shaped opening are respectively positioned on a group of opposite side edges of the dielectric substrate. The minimum end of the horn-shaped opening is a slot line end and the maximum end of the horn-shaped opening is a radiation tail end. A middle slot width change area formed between the slot line end and the radiation tail end is a radiation section. The slot line end is provided with a microstrip feed structure. The middle section of the radiation section extends to the radiation tail end. A dielectric air hole structure composed of a plurality of air hole units is arranged along the edges of the metal patches. According to the invention, through the dielectric air hole structure, the phase distribution at the radiation tail end of the antenna can be improved; the main lobe splitting phenomenon of the gradually changed slot line antenna in a high frequency band is inhibited, and the antenna gain and the overall radiation performance are improved.

Description

technical field [0001] The invention belongs to the technical field of antenna manufacture, in particular to a high-gain tapered slot-line antenna loaded by dielectric air holes. Background technique [0002] With the development requirements of large capacity and high speed in modern wireless communication systems, antennas, as an indispensable front-end device in wireless communication systems, are also required to have characteristics such as ultra-wideband, high gain, and stable radiation. The tapered slot line antenna is a common end-fire traveling wave antenna. It has the advantages of wide impedance frequency band, good time-domain characteristics, high gain, and easy planar integration. It can be used as a transceiver antenna alone or as a unit to form an antenna array. It is widely used in broadband phased array antenna system, ultra-wideband communication system and other fields. However, when the tapered slot line antenna works in the high-frequency part of the i...

AI Technical Summary

Problems solved by technology

However, when the tapered slot line antenna works in the high-frequency part of the impedance band, the effective aperture is large, and the phase distribution of the electromagnetic field on the aperture surface is not uniform, resulting in a depression or even a zero point in the main lobe of the antenna pattern, resulting in main lobe splitting.

The splitting of the main lobe will lead to a significant decrease in the gain of the tapered slot line antenna in the main radiation direction, and a sharp increase in the level of the side lobe, which limits the gain bandwidth and pattern bandwidth of the antenna, thereby restricting the actual working bandwidth of the tapered slot line antenna

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