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Broadband high-gain flat-plate Vivaldi antenna

A Vivaldi antenna and high-gain technology, applied in the field of antennas and new artificial electromagnetic materials, can solve the problems of complex cost and poor antenna directivity, and achieve the effect of improving the working bandwidth, improving the performance of the antenna, and making it simple

Inactive Publication Date: 2011-08-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this antenna is less directional
The previous method of improving its directivity is to form an antenna array and use a PBG substrate, etc., but these methods are more complicated and costly

Method used

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  • Broadband high-gain flat-plate Vivaldi antenna
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  • Broadband high-gain flat-plate Vivaldi antenna

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Embodiment Construction

[0018] along x Opening direction, graded anisotropic zero-refractive index material has multi-frequency point equivalent zero dielectric constant, in y The equivalent dielectric constant in the direction is 1. With certain design, this anisotropic material can be x Impedance matching is maintained in the propagation direction, while the equivalent dielectric constant and refractive index are zeroed at multiple frequency points. This method not only enhances the directivity and gain of the beam, but also reduces the loss. The original Vivaldi antenna has the advantages of easy manufacture, integration, broadband, and portability. Combining the two has strong practical application value. The unit arm length in (3) along x The direction is changed gradually to effectively increase the working bandwidth.

[0019] The invention consists of original Vivaldi antenna and graded anisotropic zero-refractive index material. According to the working frequency band required by the...

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Abstract

The invention discloses a broadband high-gain flat-plate Vivaldi antenna. In the antenna, a medium substrate (2) is taken as a carrier; a copper foil (1) with a horn-shaped opening is coated on one plane of the medium substrate (2); gradient anisotropic zero-refractive index materials (3) formed by a series of bending line artificial units (4) with different arm lengths (my) are arranged at the horn-shaped opening; and a plurality of the gradient anisotropic zero-refractive index materials (3) are arranged on the two sides along a direction vertical to an antenna plane to form a multi-layer gradient anisotropic material. The multi-layer gradient anisotropic material can effectively improve the E-plane directing property and the gain of an original Vivaldi antenna, has a very obvious multi-layer effect, is simple to manufacture and convenient to operate, has absolute advantages compared with a conventional improved mode, and has very high application prospect in practice.

Description

technical field [0001] The invention relates to a wide-band high-gain antenna for microwave frequency bands, which belongs to the field of antennas and novel artificial electromagnetic materials. Background technique [0002] The new artificial electromagnetic material (Metamaterials) in the present invention is an electromagnetic material that can be artificially designed to meet the requirements of specific equivalent dielectric constant and magnetic permeability. After more than ten years of development, new artificial electromagnetic materials have been greatly developed, and they are widely used in stealth and antenna engineering. The Vivaldi antenna is a slot-line antenna whose apertures are distributed exponentially. Because of its simple manufacture, small size and wide bandwidth, it is widely used in practical engineering. However, this antenna is less directional. The previous method of improving its directivity is to form an antenna array and use a PBG substrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/08
Inventor 崔铁军周斌李惠邹夏英
Owner SOUTHEAST UNIV
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