Tunable all-dielectric artificial electromagnetic material and its application
An artificial electromagnetic material and all-dielectric technology, applied in the direction of electrical components, antennas, etc., can solve the problems that artificial magnetic conductors are difficult to realize and the working frequency cannot be changed.
Active Publication Date: 2019-01-08
TSINGHUA UNIV
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Problems solved by technology
[0003] At present, there are some defects and deficiencies in artificial magnetic conductors: for example, the working frequency band of artificial magnetic conductors based on metal microstructure units is limited below the infrared band, while artificial magnetic conductors in the visible light band are difficult to realize; the work of artificial magnetic conductors based on dielectric particles The frequency is fixed, and its operating frequency cannot be changed once it is designed and manufactured
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[0042] The following describes the embodiments of the present invention in detail, and those skilled in the art will understand that the following embodiments are intended to explain the present invention, and should not be regarded as limiting the present invention. Unless otherwise specified, in the following examples that do not explicitly describe specific techniques or conditions, those skilled in the art can carry out according to commonly used techniques or conditions in this field or according to product instructions.
[0043] In one aspect of the invention, the invention proposes a tunable all-dielectric artificial electromagnetic material.
[0044] According to an embodiment of the present invention, refer to figure 1 , the all-dielectric artificial electromagnetic material includes a dielectric particle array 100, the dielectric particle array 100 includes a plurality of dielectric particles 101 distributed in a lattice, and the dielectric particles 101 are formed b...
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The invention provides a tunable all-dielectric artificial electromagnetic material and an application thereof. The tunable all-dielectric artificial electromagnetic material includes an array of dielectric particles including a plurality of dielectric particles distributed in a lattice, and the dielectric particles are formed of a ferroelectric material; Moreover, the electromagnetic resonance frequency of the dielectric particles varies with the ambient temperature. The all-dielectric artificial electromagnetic material provided by the invention, Based on the electromagnetic resonance characteristics of the dielectric particles, not only can artificial electrical conductor and artificial magnetic conductor in any frequency band be realized theoretically, The dielectric constant of the dielectric particles can be adjusted by temperature control so as to realize the tuning of the working frequency of the artificial electric / magnetic conductor or the switching of the dielectric particlearray between the artificial electric conductor and the artificial magnetic conductor at the same working frequency. In addition, the operating frequency of the artificial electric / magnetic conductorcan be reduced or amplified by the same multiple by proportionally amplifying or reducing the geometrical size of the lattice unit containing a single dielectric particle.
Description
technical field [0001] The invention relates to the technical field of artificial electromagnetic media, in particular, the invention relates to a tunable all-dielectric artificial electromagnetic material and its application. More specifically, the present invention relates to tunable all-dielectric artificial electromagnetic materials and devices based on tunable artificial electromagnetic materials. Background technique [0002] Due to their unique electromagnetic properties, perfect electric conductors and perfect magnetic conductors have or potentially have great application value in signal transmission, antennas and military affairs. Specifically, in the frequency band of terahertz and below, the electromagnetic properties of metal conductors with good electrical conductivity, such as gold and silver, are almost perfectly equivalent to those of perfect electrical conductors. Electrical conductors are called "artificial electrical conductors". The difference is that t...
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IPC IPC(8): H01Q15/14
CPCH01Q15/14
Inventor 赵乾刘井泉彭瑞光孟永钢
Owner TSINGHUA UNIV