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Antenna and electronic device

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

Active Publication Date: 2021-07-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the protection scope of the present disclosure.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are o...

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Abstract

The invention discloses an antenna and an electronic device. The antenna comprises a piezoelectric structure and a piezomagnetic structure, and the piezoelectric structure and the piezomagnetic structure are configured to enable the piezomagnetic structure to generate mechanical deformation and generate electromagnetic waves when the piezoelectric structure generates mechanical deformation under the action of an electric field. The antenna has the advantages of simple structure, high efficiency, portability and the like.

Description

technical field [0001] Embodiments of the disclosure relate to an antenna and an electronic device. Background technique [0002] Ultra-low frequency electromagnetic waves (such as 3kHz-30kHz) are often used for underwater and long-distance communications, because at these frequencies, electromagnetic waves can effectively penetrate seawater or dust, and there is little attenuation in the earth's ionospheric waveguide (such as <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 25kHz electromagnetic waves, its skin depth reaches about 1.6m in seawater. This allows the submarine to effectively communicate underwater, greatly increasing its concealment. [0003] Traditional antennas can improve the radiation efficiency of electromagnetic waves by relyin...

Claims

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Application Information

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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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