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Planar structure microwave ablation antenna based on PCB structure and ablation needle

A technology of microwave ablation and planar structure, which is applied in the direction of microwave surgical instruments, trocars, parts of surgical instruments, etc., can solve the problems of high precision requirements, low degree of design freedom, complex processing of microwave ablation antennas, etc., and achieve high precision , high degree of freedom and low cost

Active Publication Date: 2020-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current design mainly focuses on the microwave ablation antenna based on the coaxial line, but the microwave ablation antenna with the coaxial line structure is complicated to process, requires high precision, and has low design freedom, so it is difficult to modify the antenna, so most of them focus on Innovate on the external structure of the coaxial line

Method used

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  • Planar structure microwave ablation antenna based on PCB structure and ablation needle
  • Planar structure microwave ablation antenna based on PCB structure and ablation needle
  • Planar structure microwave ablation antenna based on PCB structure and ablation needle

Examples

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Embodiment 1

[0032] Such as figure 1 , figure 2 and image 3 As shown, a microwave ablation antenna with a planar structure based on a PCB structure includes an ablation puncture head 1 in a rectangular wedge structure and a needle bar 2 in a cuboid structure. The rectangular wedge structure has an upper surface, a lower surface, a bottom surface and two On the side, the bottom surface of the ablation puncture head is connected to the left end surface of the cuboid, and the present invention metallizes the outer surface of the microwave ablation antenna dielectric layer to form the upper surface metal layer 8, the lower surface metal layer 9 and two metal layers of the ablation puncture head. The side surface metal layers 10, 11; and the upper surface metal layer 12 of the needle bar, the lower surface metal layer 13 of the needle bar, and the two side surface metal layers 14, 15 of the needle bar.

[0033] In this embodiment, the bottom surface of the rectangular wedge structure has th...

Embodiment 2

[0048] In this embodiment, a microwave ablation antenna with a planar transmission line structure in the frequency bands of 0.915 GHz and 2.45 GHz is manufactured by PCB technology.

[0049] Including the ablation puncture head and the needle shaft, the internal medium of the ablation puncture head is Rogers 4350, the length is 3 mm, the length and width of the joint are both 1 mm, and the overall diameter is less than 1.5 mm. It is 3mm and the thickness is 0.035mm.

[0050] Figure 7 It is a detailed structural diagram of the needle bar 2, the length and width of the cross section are both 1mm, the total length is 100mm, the internal medium is Rogers 4003, the width of the metal strip 6 is 0.4mm, and the thickness is 0.035mm, at a distance of 5mm from the connecting surface, The metal strip is connected in series with an impedance matching stub with a width of 0.9mm, and the length of the matching stub is 4mm, such as Figure 6 As shown, the metal strip of the present inven...

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Abstract

The invention discloses a planar structure microwave ablation antenna based on a PCB structure and an ablation needle. The planar structure microwave ablation antenna based on a PCB structure comprises an ablation puncture head of a rectangular wedge structure and a needle rod of a cuboid structure; the bottom face of the rectangular wedge structure is connected with one end of the cuboid structure, the outer surface of the ablation puncture head and the outer surface of the needle rod are metalized, and an upper surface metal layer of the ablation puncture head, an upper surface metal layer of the needle rod, a lower surface metal layer of the ablation puncture head, a lower surface metal layer of the needle rod, two side surface metal layers of the ablation puncture head, and two side surface metal layers of the needle rod are formed. Compared with the prior art, the product is easy to process, high in precision, low in cost and wide in bandwidth.

Description

technical field [0001] The invention relates to the field of microwave thermal ablation, in particular to a microwave ablation antenna and an ablation needle with a planar structure based on a PCB structure. Background technique [0002] With the development of minimally invasive technology, microwave ablation technology has gradually been recognized and widely used. Microwave is a high-frequency electromagnetic wave. The transmitted electromagnetic energy can be absorbed by human tissue, and then quickly converted into a large amount of heat energy. [0003] The current design mainly focuses on the microwave ablation antenna based on the coaxial line, but the microwave ablation antenna with the coaxial line structure is complicated to process, requires high precision, and has low design freedom, so it is difficult to modify the antenna, so most of them focus on Innovate on the external structure of the coaxial line. Contents of the invention [0004] In order to overcome...

Claims

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Application Information

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IPC IPC(8): A61B18/18
CPCA61B18/1815A61B2018/1869A61B2018/183
Inventor 薛泉林森陈海东车文荃
Owner SOUTH CHINA UNIV OF TECH
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