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A Miniaturized Vivaldi Antenna Achieving Broadband

A wide-band, antenna technology, applied in the field of miniaturized Vivaldi antennas, to achieve the effects of reducing energy reflection, improving impedance characteristics, and extending the current path

Active Publication Date: 2019-05-31
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.

Method used

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  • A Miniaturized Vivaldi Antenna Achieving Broadband
  • A Miniaturized Vivaldi Antenna Achieving Broadband
  • A Miniaturized Vivaldi Antenna Achieving Broadband

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Embodiment Construction

[0043]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts 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 range of 2GHz-18GHz. In the following structural descriptions, "arc" means a segment cut on the circumference, and "curve" means other curves that are different from arcs.

[0045] Such as Figure 5 As shown, the antenna structure is divided into three layers, wherein the s...

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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 broadband. Background technique [0002] The Vivaldi antenna is an exponentially tapered slot antenna (ETSA). Because of its wide-band, low profile, low manufacturing cost and many other advantages, people pay attention to it. However, its radiation characteristics are limited by size. Therefore, the research on the miniaturization of Vivaldi antenna is one of the hot spots in the field of antenna research. [0003] The Vivaldi antenna consists of two parts, the feed structure and the radiating arm. After the fed-in electromagnetic wave energy passes through the microstrip-slotline conversion structure, the energy reaches the slotline transmission line. Since the width of the slotline transmission line is relatively narrow and the ability to radiate electromagnetic waves is weak, the fed-in electroma...

Claims

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Application Information

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Patent Type & Authority Patents(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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