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Graphene-based broadband circularly polarized annular antenna for intake type capsule endoscope

A capsule endoscope and loop antenna technology, applied in the direction of endoscope, antenna, antenna coupling, etc., can solve the problem of less research on graphene, and achieve the effects of excellent electrical conductivity, reduced loss, and extended current path

Pending Publication Date: 2019-07-26
JINLIN MEDICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic and foreign scholars' research on graphene materials in the field of antennas is mainly focused on terahertz antennas, pattern reconfigurable antennas, filter antennas, flexible antennas, and wearable antennas. There are relatively few studies on graphene in ingestive antennas.

Method used

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  • Graphene-based broadband circularly polarized annular antenna for intake type capsule endoscope
  • Graphene-based broadband circularly polarized annular antenna for intake type capsule endoscope
  • Graphene-based broadband circularly polarized annular antenna for intake type capsule endoscope

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Embodiment

[0037] Embodiment: The specific manufacturing process is as described in the embodiment. Select Rogers RO3210 dielectric substrate, dielectric constant ε r = 10.2, loss tangent tanδ = 0.003, thickness H = 0.635mm, coaxial connectors adopt standard SMA connectors. The radiation unit and the floor of the ingestive broadband circularly polarized loop antenna are made of multi-layer graphene film. The material of multi-layer graphene film has a high carrier density and excellent electrical conductivity. The antenna is made of multi-layer graphene film. It can increase impedance bandwidth and gain, effectively improve transmission efficiency and reduce loss. The thickness of the multilayer graphene film is 0.03mm, and the radius R of the dielectric substrate (1) 1 is 5mm. The outer circular patch (1-1) inner circle radius R of the graphene annular radiation patch (2) 2 3.34mm, the rectangular length L of the left L-shaped groove in the outer annular patch (1-1) 2 1.8mm, width ...

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Abstract

The invention discloses a graphene-based broadband circularly polarized annular antenna for an intake type capsule endoscope. A radiation patch and a floor material of the antenna are made of a multilayer graphene thin film, wherein the carrier density of the multilayer graphene thin film material is relatively high, and the conductive performance is excellent, so that when the multilayer graphenethin film is used for manufacturing the antenna, the impedance bandwidth and the gain can be increased, the transmission efficiency is effectively improved, and the loss is lowered. Four pairs of L-shaped grooves are formed in the outer-side annular patch, so that the current directions are alternately changed, orthogonal components with equal amplitude values and 90-degree phase difference values are formed in the space, and circular polarization characteristics are generated. An annular curved flow groove is formed in an inner side annular curved flow groove circular patch, so that the distribution of the center current of the radiation surface of the antenna is changed, and the size of the antenna is reduced. The volume of the antenna is only pi*(4.5)2 mm3, and the antenna has the characteristics of wide frequency band, circular polarization, anti-interference performance, high electromagnetic compatibility, small size and the like, is suitable for the frequency band of ISM / 2.4GHz,and can meet the working requirements of an intake complex environment.

Description

technical field [0001] The invention relates to the technical field of ingesting capsule endoscope antennas, in particular to a graphene-based broadband circularly polarized loop antenna for ingesting capsule endoscopes, which is suitable for circularly polarized ingesting capsules in the ISM 2.4GHz frequency band Looking glass device. Background technique [0002] Traditional endoscope is a relatively direct and commonly used method for diagnosing and treating gastrointestinal diseases. It usually consists of a monitor and an optical fiber installed with a video camera. However, the traditional endoscope is inserted directly through the mouth or anus during treatment. This not only It brings great pain to patients, and it is also easy to cause complications, causing patients to give up treatment due to fear. The scope cannot access the middle and proximal parts of the small intestine, leaving two-thirds of the small intestine undetectable. With the rapid development of in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/52H01Q15/24H01Q1/22A61B1/04
CPCH01Q1/36H01Q1/38H01Q1/22H01Q1/225H01Q1/526H01Q15/24A61B1/041A61B1/00016
Inventor 欧仁侠张华磊鲍捷祝颖张光雷
Owner JINLIN MEDICAL COLLEGE
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