Vivaldi antenna realizing low return loss and high gain at low frequency

A technology with return loss and high gain, which is applied to antennas, electrical components, and structural forms of radiation elements, etc., can solve the problems of difficult and poor Vivaldi antennas, achieve enhanced radiation stability, simple structure, and reduce side lobes Effect

Inactive Publication Date: 2020-02-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that it is difficult for the Vivaldi antenna to achieve lower return loss at low frequencies, especially in lower frequency bands.

Method used

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  • Vivaldi antenna realizing low return loss and high gain at low frequency
  • Vivaldi antenna realizing low return loss and high gain at low frequency
  • Vivaldi antenna realizing low return loss and high gain at low frequency

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 CAVA, figure 2 As shown in EGSA, the EGSA provided by the present invention includes a dielectric substrate 1 , a metal radiation sheet 2 , a microstrip balun 3 , an elliptical groove line 4 , an exponentially graded groove line 5 and a corrugated exponentially graded groove (EGS) 6 . Metal radiation pieces 2 are respectively fixed on the top surface and bottom surface of the dielectric substrate 1, and the microstrip balun used for impedance matching is composed of linear tapered microstrip lines and 4 metal patches with elliptical groove lines. The metal radiating sheet 2 is provided with a trumpet-shaped opening and an exponentially changing groove line 5 symmetrical to its horizontal central axis, and the outer wall of the metal radiating sheet 2 is provided with a corrugated exponentially changing groove 6 .

[0...

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Abstract

The invention discloses a Vivaldi antenna realizing low return loss and high gain at low frequency. The Vivaldi antenna is characterized in that an exponential gradient slot is loaded on the outer side of the CAVA. An EGSA antenna comprises a dielectric substrate, metal radiation sheets, a microstrip balun, an elliptical slot line and the exponential gradient slot. The metal radiation sheet are respectively fixed on the top surface and the bottom surface of the dielectric substrate. The impedance matching microstrip balun is composed of a linear gradient microstrip line and a metal patch withan elliptical slot line. The exponential gradient slot structure (EGS) is loaded on the outer side of the metal radiation sheets, the operating bandwidth of the EGSA at S<11> < -10dB is increased to 185% of that of CAVA and the EGS structure effectively improves the return loss in low frequency band.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a Vivaldi antenna that realizes low return loss and high gain at low frequencies. Background technique [0002] With the development of communication technology, antennas with broadband, high gain, and good directivity have attracted more and more attention. The Vivaldi antenna, that is, the exponentially tapered slot antenna, is an end-fired gradient slot antenna proposed by Gibson in 1979. Its current is concentrated and distributed near the exponentially changing slot line, and slot lines of different widths correspond to different frequencies of radiation. electromagnetic waves. In theory, this antenna can achieve a very wide operating bandwidth. In addition, the Vivaldi antenna has high gain and good end-fire performance. Therefore, it is widely used in communication and electronic countermeasure systems. [0003] For the traditional Vivaldi antenna, althoug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/08H01Q1/38
CPCH01Q1/38H01Q13/085
Inventor 杜伯学宁江涛
Owner TIANJIN UNIV
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