Antennas and Electronic Devices

An antenna and electrode technology, applied in the field of antennas and electronic devices, can solve problems such as difficulty in installing mobile devices

Active Publication Date: 2022-08-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Traditional antennas can improve the radiation efficiency of electromagnetic waves by relying on electromagnetic resonance. However, traditional antennas need to have a larger size when transmitting or receiving electromagnetic waves of larger size (that is, lower frequency). The same order of magnitude, which makes the portability of traditional electronic antennas a challenge
For example, the size of a traditional antenna capable of emitting ultra-low frequency (eg, 30kHz) electromagnetic waves is greater than 1 km, and it is difficult to install it on a mobile device with a simple structure

Method used

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Embodiment Construction

[0031] In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

[0032] Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in this disclosure, "first," "second," and similar terms do not denote any order, quantity, or importance, but are merely used ...

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Abstract

An antenna and an electronic device. The antenna includes a piezoelectric structure and a piezoelectric magnetic structure, and the piezoelectric structure and the piezoelectric magnetic structure are configured such that when the piezoelectric structure is mechanically deformed under the action of an electric field, the piezoelectric structure is mechanically deformed and an electromagnetic wave is generated. The antenna has the advantages of simple structure, high efficiency and portability.

Description

technical field [0001] Embodiments of the present disclosure relate to an antenna and an electronic device. Background technique [0002] Underwater and long-distance communications often use ultra-low frequency electromagnetic waves (e.g. frequencies of 3kHz-30kHz), because at these frequencies electromagnetic waves can penetrate seawater or dust effectively, and there is little attenuation in Earth's ionospheric waveguides (e.g. <6db / 1000km). The signal penetration depth or skin depth increases as the frequency of the electromagnetic wave decreases. For example, the skin depth of electromagnetic waves in seawater is inversely proportional to the 1 / 2 power of its frequency (δ=252(f) -1 / 2 ); for electromagnetic waves at 25kHz, the skin depth reaches about 1.6m in seawater. This allows submarines to communicate effectively underwater, greatly increasing their stealth. [0003] Traditional antennas rely on electromagnetic resonance to improve the radiation efficiency o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/27H01Q1/34
CPCH01Q1/36H01Q1/27H01Q1/34
Inventor 南天翔田世伟季雅惠
Owner TSINGHUA UNIV
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