Vivaldi antenna for medical imaging and manufacturing method thereof

A medical imaging and antenna technology, applied in resonant antenna, basically flat resonant element, radiating element structure and other directions, can solve the problems of affecting radiation effect and imaging effect, increasing antenna loss, weakening beam directivity, etc. Current backflow phenomenon, improve directional radiation performance, improve the effect of radiation beam

Pending Publication Date: 2022-03-15
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The size of the original viavldi antenna is affected by the antenna frequency, widening the operating frequency of the antenna's low frequency point will increase the antenna size
In addition, due to the phenomenon of current backflow on the surface of the patch, a part of the current will flow from the inside of the exponential gradient line to the edge of the patch, resulting in non-concentration of energy, increased antenna loss, reduced gain, and weakened beam directionality, which affects radiation and imaging effects.
At high frequencies, the directivity of the original viavldi antenna needs to be improved

Method used

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  • Vivaldi antenna for medical imaging and manufacturing method thereof
  • Vivaldi antenna for medical imaging and manufacturing method thereof
  • Vivaldi antenna for medical imaging and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] In a first aspect, the present invention provides a vivaldi antenna for medical imaging, comprising:

[0073] A radiation patch, a dielectric substrate, and a microstrip line, the radiation patch is located on the top layer of the dielectric substrate, the microstrip line is located on the bottom layer of the dielectric substrate, and a plurality of bottle-shaped grooves are etched on both sides of the surface of the radiation patch. To weaken the current backflow phenomenon.

[0074] The radiation patch includes an exponential gradient patch and a rectangular patch, and the exponential gradient patch and the rectangular patch are connected.

[0075] The exponential gradient patch is set in two groups, and a plurality of metal strips are loaded in the middle of the opening groove surrounded by the two groups of exponential gradient patches to improve the directivity of the antenna; the two groups of exponential gradient patches The open slots surrounded by the sheets i...

Embodiment 2

[0102] The invention provides a method for manufacturing a vivaldi antenna for medical imaging, comprising: drawing the dielectric substrate of the original vivaldi antenna, including drawing an exponential patch on the top layer of the dielectric substrate, and drawing a rectangular transition groove on the top layer of the substrate;

[0103] Determine the gradient rate of the exponential gradient line according to the width of the rectangular transition slot;

[0104] Draw a rectangular patch and connect it with an exponential patch to form a radiation patch;

[0105] Draw the feeder line to couple and transmit energy to the top dielectric substrate to ensure uniform feeder;

[0106] Etch bottle-shaped grooves on both sides of the radiation patch, and an exponential gradient opening groove;

[0107] The metal strip is loaded in the middle of the exponentially changing open slot, which is used to guide the propagation of the beam at the open slot;

[0108] Model the antenn...

Embodiment approach

[0123] On the basis of the designed original antenna, this embodiment provides a design scheme of the vivaldi antenna with bottle-shaped grooves etched on both sides of the patch.

[0124] The bottle-shaped grooves 6 on both sides of the patch can weaken the current return and improve the performance of the antenna. refer to figure 2 , to design the bottle-shaped grooves on both sides of the radiation patch. At first the height of the single bottle-shaped groove 6 is designed. The length cl of the single bottle-shaped groove 6 in this embodiment is determined by formula (7), and λ is the wavelength of the lowest frequency of the antenna. The bottle-shaped groove 6 is made up of two sections of rectangles, and the heights of the two sections of rectangles are respectively equal to 1 / 2 of the overall height of a single bottle-shaped groove 6 . In this embodiment, the height of the single bottle-shaped groove 6 is 20 mm to ensure that the bottle-shaped structure groove 6 can ...

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Abstract

The invention discloses a vivaldi antenna for medical imaging and a manufacturing method of the vivaldi antenna, the antenna comprises a radiation patch, a dielectric substrate and a microstrip line, the radiation patch is located at the top layer of the dielectric substrate, the microstrip line is located at the bottom layer of the dielectric substrate, and a plurality of bottle-shaped grooves are etched in two sides of the surface of the radiation patch and are used for weakening the current backflow phenomenon. The radiation patch comprises an exponential gradual change patch and a rectangular patch, and the exponential gradual change patch is connected with the rectangular patch. According to the antenna, the bottle-shaped grooves with the same length, the same width and the same interval are etched in the two sides of the surface of the radiation patch, the current backflow phenomenon on the surface of the patch is weakened, energy is concentrated, and the antenna characteristics such as return loss, standing-wave ratio, gain, radiation efficiency and directivity are effectively improved.

Description

technical field [0001] The invention relates to the technical field of antenna design, in particular to a vivaldi antenna for medical imaging and a manufacturing method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the continuous improvement of science and technology, medical imaging technology has also developed rapidly. Medical imaging can facilitate doctors to quickly and accurately obtain pathological information, propose a plan, and treat patients in a timely manner. [0004] Traditional medical imaging techniques include CT, MRI, B-ultrasound and so on. Compared with traditional technology, microwave imaging technology not only has a fast detection time and accurate imaging results, but also has relatively cheap equipment and is less harmful to the human body. It uses a very weak electromagnetic radiation to reshape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q9/04
CPCH01Q1/38H01Q9/0407
Inventor 王晶晶刘健伟
Owner SHANDONG NORMAL UNIV
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