A differentially fed dual-frequency circularly polarized antenna for biomedical telemetry
A circularly polarized antenna and differential feed technology, applied in the field of telemedicine, can solve problems such as difficult to cope with the complex and changeable application environment requirements implanted in the human body, and achieve the effects of power saving, high gain, and easy integration
Active Publication Date: 2018-04-13
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0003] At present, most of the antenna technologies implanted in the human body are designed as antennas with only a single characteristic, such as dual-frequency antennas, circularly polarized antennas, or differentially fed antennas. Single-function antennas are difficult to cope with complex and changeable applications implanted in the human body. Environmental requirements
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[0027] As shown in Figure 1(a) and Figure 1(b), a differentially fed dual-frequency circularly polarized antenna for biomedical telemetry includes an antenna radiation unit 2, a metal floor 10, a dielectric substrate 1, a coaxial feed Electric structure 9A, 9B and biocompatible coating structure, the antenna radiation unit 2 is located on the upper surface of the dielectric substrate 1, the metal floor 10 is located on the lower surface of the dielectric substrate 1, the antenna radiation unit 2 is composed of a double ring structure 3 and Four isosceles triangles 4A, 4B, 6A, 6B are formed.
[0028] The double ring structure is composed of two symmetrical quasi-hexagonal rings with a common side, the two quasi-hexagonal rings are located on the left and right sides of the upper surface of the dielectric substrate, and are symmetrical about the center point of the antenna radiation unit.
[0029] The width W2 of the common side of the quasi-hexagonal ring is 0.7 mm, and the wid...
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The invention discloses a differential feed dual-band circularly-polarized antenna for biomedical telemetry, which comprises an antenna radiation unit, a metal ground plate, a dielectric substrate, a coaxial feed structure and a biocompatible coating structure, wherein the antenna radiation unit is located on the upper surface of the dielectric substrate; the metal ground plate is located on the lower surface of the dielectric substrate; the antenna radiation unit is formed by a dual-ring structure and four isosceles triangles; the dual-ring structure is formed by two symmetrical quasi-hexagon rings with a common edge; and the four isosceles triangles comprise two isosceles triangles located inside the quasi-hexagon rings respectively and two isosceles triangles located above and below the dielectric substrate. The differential feed dual-band circularly-polarized antenna for biomedical telemetry is applicable to the biomedical field, and has the advantages of miniature, easy integration, low profile, high gain, low interference, working at two modes, saved power consumption, biocompatibility and the like.
Description
technical field [0001] The invention relates to the field of telemedicine, in particular to a differentially fed dual-frequency circularly polarized antenna for biomedical telemetry. Background technique [0002] With the improvement of people's living standards, issues such as medical treatment and health monitoring have received more and more attention. In medical diagnosis and remote monitoring, the implanted antenna has become one of the core components of the data transmission system, and the performance of the antenna will directly affect the implementation of the entire medical process and the accuracy of diagnosis. Due to the complexity of the working environment of implanted antennas, many factors need to be considered in antenna design, such as the lossy dispersion characteristics of human tissue, the limited space of implanted parts, biocompatibility and other requirements, the safety of electromagnetic radiation and the impact of antenna radiation on the human bo...
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IPC IPC(8): H01Q1/38H01Q1/50
CPCH01Q1/38H01Q1/50
Inventor 刘雄英杨贤涛
Owner SOUTH CHINA UNIV OF TECH