Double-beam frequency scanning leaky-wave antenna
A frequency scanning, leaky wave antenna technology, applied to leaky waveguide antennas, antennas, electrical components and other directions, can solve the problems of occupying too much spectrum resources, increased cost, design difficulties, etc., to improve radiation efficiency, simple structure, suppress prohibition effect with effect
Active Publication Date: 2021-03-02
EAST CHINA NORMAL UNIV
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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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[0041] In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.
[0042] refer to figure 1 , the embodiment of the present invention is provided with a dielectric substrate 1, the top and bottom of the dielectric substrate 1 are covered with metal panels, the top metal panel 2 and the bottom metal panel 3 are printed on the dielectric substrate 1 by PCB technology.
[0043] refer to figure 1 , figure 2 , the two ends of the top metal panel 2 are rectangular microstrip feeders 21 connected to trapezoidal impedance matching microstrip lines 22, and the semi-cloud-shaped impedance modulation area 23 set on the top metal panel 2 is divided into two parts, and the second part 25 is located at In the middle, the long groove above it is a double-period sinusoidal impedance modulation groove with a periodic change in etching height...
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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...
Claims
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IPC IPC(8): H01Q1/36H01Q13/20H01Q13/08
CPCH01Q1/36H01Q13/20H01Q13/08
Inventor 彭臻翟国华丁军高建军
Owner EAST CHINA NORMAL UNIV
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