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High gain broadband dielectric lens Vivaldi antenna

A dielectric lens and wide-band technology, applied in the field of radiation array antennas, can solve the problems of low-frequency gain of Vivaldi antennas, etc., and achieve the effects of improving current distribution, increasing working bandwidth, and good impedance matching

Active Publication Date: 2013-09-25
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to: aim at the problem that the low-frequency gain of Vivaldi antenna is low, design a kind of broadband, high gain, and the dielectric lens Vivaldi antenna with simple structure

Method used

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  • High gain broadband dielectric lens Vivaldi antenna
  • High gain broadband dielectric lens Vivaldi antenna
  • High gain broadband dielectric lens Vivaldi antenna

Examples

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Effect test

example 1

[0032] A high-gain broadband dielectric lens Vivaldi antenna array operating in the C-band. All structures of the antenna unit are compatible with figure 1 It is exactly the same, using Chebyshev gradient strip line feed, the dielectric constant of the lens in the middle of the slot line is 10.2, the dielectric constant of the dielectric substrate is 2.65, the thickness h=2mm, the antenna unit W=52mm, L=102mm. The antenna array structure is as image 3 As shown, the horizontal spacing of units dx=35mm, and the vertical spacing dy=17mm.

[0033] Figure 4 The active standing wave curves are simulated for each array element in Example 1. It can be seen that the active standing waves in the working frequency band are all less than 2, which satisfies the index requirements well.

[0034] Figure 5 The antenna array gain curve of Example 1 shows that the dielectric lens significantly increases the low-frequency gain of the antenna.

[0035] Image 6 , Figure 7 It is the pa...

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Abstract

The invention relates to a high gain broadband dielectric lens Vivaldi antenna. The array antenna comprises a substrate, a radiation slot, a dielectric lens and a Chebychev tapered strip line feeder. According to the high gain broadband dielectric lens Vivaldi antenna, through changing the structural size of the dielectric lens, the fluctuation of antenna radiation impedance can be effectively improved so as to obtain better impedance matching, the transmission speed of an electromagnetic wave in the slot can be reduced according to the high dielectric constant of the lens, the current distribution on an antenna aperture is improved, thus a spherical wave is a nearly a plane wave, the antenna radiation efficiency is raised, and a higher antenna gain is obtained. According to a Chebychev tapered strip line, the impedance matching of the antenna can be improved further, and the working band is broadened. The array antenna in the invention has the characteristics of high gain and broad band and is suitable for a radiation unit of wideband array antennas of the field of mobile communication and a military radar.

Description

technical field [0001] The invention relates to a high-gain broadband dielectric lens Vivaldi antenna. The array antenna is widely used in microwave and millimeter wave fields, and can be used as a radiation array antenna in the field of mobile communication and military radar. Background technique [0002] In 1979, Gibson proposed a slot line antenna that gradually changes according to the exponential law, that is, the Vivaldi antenna, which has the characteristics of end-fire radiation, wide frequency band, high gain, linear polarization, etc., and has low profile, light weight, easy fabrication, and easy sharing. Shaped installation, easy integration with microwave circuits, etc. [0003] Vivaldi antennas generally introduce energy in the form of microstrip, stripline or coaxial transmission lines. Through electromagnetic coupling or dielectric coupling, energy conversion is performed between the feed transmission line and the radiation slot line, and the electromagnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q9/04H01Q13/08H01Q19/06
Inventor 袁洪吴志锋徐勤
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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