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Miniaturized Vivaldi antenna capable of realizing wide band

A broadband, antenna technology, applied in the field of miniaturized Vivaldi antennas, to achieve the effect of increasing the equivalent electrical length, reducing the reflection of energy, and improving the impedance characteristics

Active Publication Date: 2017-11-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these structures can meet the requirements at the same time. The operating frequency of the Vivaldi antenna can cover the frequency band range of 2-18 GHz, and the size of the Vivaldi antenna is less than 0.3 times the wavelength corresponding to the lowest operating frequency.

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  • Miniaturized Vivaldi antenna capable of realizing wide band
  • Miniaturized Vivaldi antenna capable of realizing wide band
  • Miniaturized Vivaldi antenna capable of realizing wide band

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Embodiment Construction

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0044] This embodiment provides a miniaturized Vivaldi antenna with a size of 43.5mm×40mm×0.5mm (x×y×z, length×width×thickness) and a working frequency that can cover the frequency band of 2GHz-18GHz. In the following structure description, "arc" means a section cut on the circumference, and "curve" means other curves different from arcs.

[0045] Such as Figure 5 As shown, the antenna structure is divided into three layers. The second layer is a...

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Abstract

An embodiment of the invention provides a miniaturized Vivaldi antenna capable of realizing wide band. The antenna structure comprises three layers, wherein the second layer is a dielectric substrate prepared from a non-conductive material; the first layer comprises the floor in an antenna feed structure, two antenna radiation arms, two parasitic patches and two loaded lumped resistors; the third layer is a microstrip in the antenna feed structure; the two parasitic patches are arranged below the two antenna radiation arms respectively; and the lumped resistors are used for being connected with the parasitic patches and the antenna radiation arms. By virtue of the parasitic patches, the antenna dimension is not enlarged, the current path on the surface of the antenna and the equivalent electrical length can be prolonged, and the shape and the dimension can be adjustable; and by virtue of the loaded resistors, energy reflection can be reduced, and antenna impedance characteristic can be improved, so that miniaturization of the antenna can be realized effectively, and the dimension of the antenna can be less than or equal to 0.3 times of the corresponding wavelength at the lowest working frequency.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic fields and antennas, in particular to a miniaturized Vivaldi antenna capable of realizing a wide frequency band. Background technique [0002] Vivaldi antenna is an exponential tapered slot antenna (ETSA). Because of its wide frequency band, low profile, low manufacturing cost and many other advantages, it has attracted people's attention. However, its radiation characteristics are restricted by size. Therefore, the miniaturization of Vivaldi antennas is one of the current research hotspots in the antenna field. [0003] The Vivaldi antenna consists of two parts: a feed structure and a radiating arm. After the fed electromagnetic wave energy passes through the microstrip-slot line conversion structure, the energy reaches the slot line transmission line. Because the width of the slot line transmission line is relatively narrow and the ability to radiate electromagnetic waves is weak, the fed elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50
CPCH01Q1/38H01Q1/48H01Q1/50
Inventor 敖杰黄敬健吴微微袁乃昌陈曦周扬
Owner NAT UNIV OF DEFENSE TECH
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