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Implanted circularly polarized antenna loaded with gradient structure for wireless biomedicine

A technology of circularly polarized antennas and gradient structures, applied in the structural form of radiation elements, antenna grounding switch structural connections, antennas, etc., can solve the problems of increasing the volume of antennas, and achieve good biocompatibility, reduce interference, and wide frequency bands

Pending Publication Date: 2019-12-31
JINLIN MEDICAL COLLEGE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Circularly polarized antennas usually use single-feed, and double-feed or multi-feed will increase the size of the antenna

Method used

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  • Implanted circularly polarized antenna loaded with gradient structure for wireless biomedicine
  • Implanted circularly polarized antenna loaded with gradient structure for wireless biomedicine
  • Implanted circularly polarized antenna loaded with gradient structure for wireless biomedicine

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Embodiment

[0035] 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 length L of the dielectric substrate 1 is 9 mm, and the width W is 9 mm. Adding X-shaped slots inside the radiation patch can extend the effective current path on the surface of the radiation patch and further reduce the size of the antenna. The outer radius R of the semi-circular groove in the X-shaped groove 2-1 of the gradient structure radiation patch 2 is loaded 4 2.9mm, inner circle radius R 3 2.5mm, the radius R of the semicircular groove in the lower arched groove 2-2 and the upper arched groove 2-3 2 The length L of the short rectangular slot is 2.2mm 5 0.6mm, width W 2 The length L of the long rectangular slot is 2.4mm 4 0.6mm, width W 1 4.8mm, the distance L between the lower edge of the long re...

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Abstract

The invention discloses an implanted circularly polarized antenna loaded with a gradient structure for wireless biomedicine. The installation of an X-shaped groove inside a radiation patch can extendthe effective current path on the surface of the radiation patch and further reduce the size of the antenna. Loading a umbrella-shaped gradient structure can increase the capacitance distribution perunit length, increase a propagation constant, shifts the antenna resonance frequency to the low frequency, and reduces the size of the antenna. Installing a semicircular groove can increase new resonance points, thereby widening the bandwidth. The long rectangular grooves in upper and lower arched grooves introduce geometric perturbation so as to form two orthogonal components with equal amplitudes and a phase difference of 90 degrees, thereby resulting in circular polarization characteristics. The antenna only has a size of 9*9*0.635mm3, has the characteristics of anti-interference, miniaturization, a wide frequency bandwidth, circular polarization, and excellent biocompatibility, is easy to be integrated into an implantable wireless biomedical device, is suitable for ISMM2.45GHz band, and can meet the working needs after implanted into human tissues.

Description

technical field [0001] The invention relates to the technical field of implantable antennas, in particular to an implantable circularly polarized antenna with a gradient loading structure for wireless biomedicine, which is suitable for implantable circularly polarized wireless biomedical devices in the ISM 2.45GHz frequency band. Background technique [0002] Wireless body area network is a communication network composed of sensors on or in the body and various network elements scattered around the body. Implantable systems are an important part of wireless body area network. The implantable system is mainly used to measure the biochemical and physiological parameters of the living body under the condition that the living body is not restrained, and is used for disease diagnosis and organ replacement. The basic principle of the implantable system is to use the sensors implanted in the living body to collect various information, process it into a debugging signal through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q1/52A61B5/00
CPCH01Q1/38H01Q1/48H01Q1/50H01Q1/526A61B5/0015A61B5/6847
Inventor 欧仁侠张华磊鲍捷齐秋菊李洪亮张光雷
Owner JINLIN MEDICAL COLLEGE
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