High-scanning-rate leaky-wave antenna based on metamaterial unit

A technology of leaky wave antenna and scanning rate, which is applied in the direction of slot antenna, antenna grounding switch structure connection, radiation element structure form, etc., and can solve the problems such as difficult to use the front-end circuit

Active Publication Date: 2021-05-07
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the narrow band will greatly simplify the requirements of the front-end hardware, while the traditional leaky ...

Method used

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  • High-scanning-rate leaky-wave antenna based on metamaterial unit
  • High-scanning-rate leaky-wave antenna based on metamaterial unit
  • High-scanning-rate leaky-wave antenna based on metamaterial unit

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Embodiment 1

[0025] like figure 1 As shown, the complementary L-shaped metal resonant structure of the leaky wave antenna with high scanning rate adopted in the present invention is composed of two L-shaped metal strips placed in parallel. When an electromagnetic wave passes through, the induced current in the metal sheet becomes the conductive current Jc (the conductive current), and there is a capacitance between the two metal strips, so a displacement current Jd (the displacement current Jd (the displacement current) is generated between the head and the tail of the two metal strips). ), thus forming a current loop and generating resonance. The resonance produces an equivalent negative permittivity and an equivalent negative permeability around the metal structure, making the medium appear as a left-handed material with double negative properties.

[0026] like figure 2 As shown, the unit structure of the leaky wave antenna is composed of the SIW integrated substrate waveguide, the m...

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Abstract

The invention discloses a high-scanning-rate leaky-wave antenna based on a metamaterial. The antenna is loaded with a complementary L-type sub-wavelength metal resonance unit so as to achieve the left-hand electromagnetic characteristic of a specific frequency band. The antenna unit comprises a pair of complementary L-shaped metal resonance units which are formed by metal through holes and printing metal strips, and the position, which corresponds to a metal resonator, of the top layer is provided with a rectangular groove so as to achieve electromagnetic wave leakage. The period p of the antenna unit meets the spatial harmonic formula of the periodic leaky-wave antenna: [beta]n=[beta]0-2[pi]n/p. The leaky-wave antenna adopts an SIW structure, and a port adopts a trapezoidal SIW structure and a microstrip line to realize port feeding and impedance matching together. The antenna adopts an SIW structure and microstrip feed, is small in size, stable in structure and high in scanning rate of a directional diagram in a unit frequency band, and has very high practical potential for applications of communication engineering, microwave imaging, radar scanning and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a leaky wave antenna with a high directional pattern scan rate based on a metamaterial structure utilizing a metal subwavelength unit. Background technique [0002] The leaky wave antenna is a typical traveling wave antenna, which has the characteristics of wide bandwidth, narrow beam width and beam scanning, and its feeding method is simple and the manufacturing cost is low. Leaky-wave antennas have potential information transmission applications in time-frequency conversion due to their ability to change the beam scanning direction with frequency. According to this characteristic, leaky wave antenna has potential application value in radar, microwave imaging, spectrum analysis and communication engineering. [0003] The leaky wave antenna originated from a continuous long straight slot in the side wall of the metal waveguide along the propagation direction, and la...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q13/10
CPCH01Q1/38H01Q1/50H01Q13/10
Inventor 徐魁文王权段江波彭亮
Owner HANGZHOU DIANZI UNIV
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