Double-beam frequency scanning leaky-wave antenna

Abstract

The invention discloses a dual-beam frequency scanning leaky-wave antenna. The dual-beam frequency scanning leaky-wave antenna is composed of a dielectric substrate, a top metal panel, a bottom metalpanel and a metal tube, a half-mode substrate integrated waveguide structure is adopted, based on the periodic sine impedance modulation principle, a double-period sine impedance modulation groove isformed in the top metal panel to serve as a radiation unit, and due to the fact that the top metal panel is formed by superposing sine impedances of two kinds of single beams, beams in two radiation directions can be generated; a periodically changing groove is also arranged on the bottom metal panel as a radiation unit, so that the radiation efficiency of the antenna can be improved, the stop band effect of the periodic leaky-wave antenna can be inhibited, and compared with the traditional double-beam frequency scanning antenna, the dual-beam frequency scanning leaky-wave antenna has the characteristics of simple structure, narrow bandwidth, large scanning angle and the like.

Description

technical field [0001] The invention relates to the technical field of microwave, wireless communication and test simulation, in particular to a dual beam frequency scanning leaky wave antenna based on periodic sinusoidal impedance modulation. Background technique [0002] Leaky wave antenna is a kind of traveling wave antenna, which has a simple structure, the ability of frequency scanning, and excellent directivity. It has been widely used in radar, aerospace and other fields. Since the invention of the leaky wave antenna, the technology has been very mature so far, and can be divided into the following four categories: uniform, quasi-uniform, periodic, and left-handed composite leaky-wave antennas. The periodic leaky-wave antenna is a type of antenna that excites high-order harmonics for radiation. Because the traditional periodic leaky-wave antenna has problems such as narrow scanning angle and large bandwidth, it is difficult to realize dual-beam scanning. Therefore, ho...

AI Technical Summary

Problems solved by technology

The periodic leaky-wave antenna is a type of antenna that excites high-order harmonics for radiation. Because the traditional periodic leaky-wave antenna has problems such as narrow scanning angle and large bandwidth, it is difficult to realize dual-beam scanning. Therefore, how to realize a wide range and narrow bandwidth Dual-beam frequency-scanning antenna has become a focus of leaky-wave antenna design

[0003] The most common way to increase the scanning range is to increase the scanning frequency range, but this will bring relatively large bandwidth and occupy too much spectrum resources

In addition, in order to achieve dual-beam radiation, the traditional method is to use the common radiation of -1 and -2 harmonics to achieve dual beams, or to integrate two antennas with different radiation directions to achieve dual beams, but this It will bring design difficulties, complex structure, cost increase and other problems

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