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A Low Impedance Deformable Flexible Planar Helical Antenna

A planar spiral, deformation flexible technology, applied in the direction of loop antenna, antenna, antenna grounding switch structure connection, etc., can solve the problems of flexible antennas losing flexibility and stretchability, unable to connect with flexible antennas, etc., to ensure strength, good Practicality, the effect of reducing impedance

Active Publication Date: 2021-05-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The input impedance of the self-complementary Archimedes spiral antenna is 188.5 ohms. For a hard antenna, the planar Archimedes spiral antenna can be connected with a balun impedance converter to solve the impedance transformation, but for a flexible antenna, the traditional balun A balancer cannot be attached to a flexible antenna as this will cause the flexible antenna to lose its flexibility and stretchability

Method used

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  • A Low Impedance Deformable Flexible Planar Helical Antenna
  • A Low Impedance Deformable Flexible Planar Helical Antenna
  • A Low Impedance Deformable Flexible Planar Helical Antenna

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0028] The low-impedance deformable flexible planar helical antenna provided by the present invention has a structure such as figure 1 , figure 2 As shown, it includes: a flexible dielectric substrate 10, and an antenna radiator 20 disposed on the flexible dielectric substrate; the antenna radiator 20 consists of an equiangular helix 201 in the inner part and a self-complementary Archimedes spiral in the outer part Line 202 is connected to form;

[0029] Wherein, the equiangular helix 201 satisfies the following relationship:

[0030]

[0031] Among them, r 0 is the initial inner diameter of the equiangular helix, r 0 = 1.5mm, a 1 is the angular transformation rate of the equiangular helix, a 1 =0.22, Ф is the angle of the equiangular helix, Ф=4π (2 turns), and the total radius of the obtained equiangular helix is ​​24.8mm;

[0032] Among them...

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Abstract

The invention belongs to the technical field of flexible antennas, and specifically provides a deformable low-impedance flexible planar helical antenna, including a flexible dielectric substrate and an antenna radiator arranged on the flexible dielectric substrate. The antenna radiator consists of an equiangular helix with the same width It is connected with the self-complementing Archimedes spiral. The flexible planar helical antenna of the present invention has stretchability and deformation ability, can be attached to the surface of a sphere (such as a balloon), and the performance of the antenna remains unchanged after deformation. The invention adopts the equiangular helix to reduce the input impedance of the antenna itself, and the flexible planar helix antenna can keep the return loss less than -10dB, the axial ratio less than 4, and the gain not less than 3.5dB at the frequency of 1.5GHz-4.5GHz after deformation.

Description

technical field [0001] The invention belongs to the technical field of flexible antennas, in particular to a deformable low-impedance flexible planar helical antenna. Background technique [0002] As the transmitting and receiving devices of wireless signals, antennas have always been an important research object of wireless network technology; with the development of flexible electronic devices, traditional hard antennas are limited because they cannot adapt to flexible wearable devices to a certain extent; and hard Quality antennas tend to be bulky and heavy, take up a lot of space and are not easy to carry. In this context, it is currently necessary to develop new flexible antennas based on traditional hard antennas to adapt to current flexible electronic devices such as wearable devices and health and medical supplies; flexible antennas can not only achieve miniaturization, but also do not take up too much space. Space, and can achieve a certain degree of stretching, no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/22H01Q1/36H01Q1/38H01Q1/40H01Q1/50H01Q7/00
Inventor 潘泰松戴令亮陈思宏林媛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA