An ultra-small electrical size electromagnetic resonance unit and its left-handed medium and application
A resonant unit and left-handed media technology, applied in the direction of electrical components, antennas, etc., can solve the problem that the lumped inductance and capacitance transmission loss and radiation loss cannot be ignored
Inactive Publication Date: 2019-04-12
ZHEJIANG UNIV
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Problems solved by technology
However, in the microwave and millimeter wave frequency bands, the transmission loss and radiation loss of the lumped inductance and capacitance cannot be ignored
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[0032] The present invention will be further described below in conjunction with drawings and embodiments.
[0033] Embodiments of the present invention and its implementation work process are as follows:
[0034] figure 2 To use an example of the resonant unit of the present invention, the resonant unit has a double-layer structure, including a metal structure 1 on the top layer and a dielectric plate 2 on the bottom layer. When the electric field direction of the incident wave is along the x direction, the magnetic field is along the y direction, and the propagation direction is along the z axis direction, since the electric field is perpendicular to the double parallel line structure, currents in opposite directions will be generated on the two parallel transmission lines; The helical structure of parallel lines will generate a circular current when the magnetic field is perpendicular to the helical ring, which is a necessary condition for magnetic resonance. At the same...
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The invention discloses an ultra small-electric size electromagnetic resonant unit, a left-handed medium formed by the same and an application. The resonance unit includes a substrate and two parallel 1 / 2 wavelength open-circuited transmission lines arranged on the substrate; the two parallel transmission lines are spirally arranged in a coiled manner; the two parallel transmission lines can be excited by an electric field and a magnetic field simultaneously under electromagnetic waves so as to generate electric resonance and magnetic resonance; a plurality of resonant units can be connected together along the same line through coupled inductors so as to be arranged to form a resonant group; a plurality of resonant groups are arrayed at intervals in parallel at the same plane so as to form a resonant layer; and a plurality of resonant layers are stacked along a vertical direction so as to form the left-handed medium. The resonant unit of the invention can form a superbly uniform artificial medium, and the defect of low uniformity of a traditional continuous medium such as Teflon can be eliminated, and therefore, the artificial medium can be applied in practice, and the original characteristics of the artificial medium can be maintained. The resonant unit can be widely applied to the field of various kinds of artificial media.
Description
technical field [0001] The invention relates to the field of artificial microwave media, in particular to an ultra-small electric size electromagnetic resonance unit based on a single-layer planar process structure in the field of artificial microwave media and the left-handed media formed therefrom and its application. Background technique [0002] The physical essence of the artificial medium is to simulate the electromagnetic polarization of atoms in the natural medium through densely arranged sub-wavelength resonant units to obtain specific frequency dispersion in the desired frequency band. The left-handed medium is a medium with negative permittivity and magnetic permeability at the same time. Its special feature is that its properties are not determined by its chemical composition, but by its subwavelength structure. The subwavelength structure that makes up the left-handed medium usually refers to the electromagnetic resonant unit whose size is subwavelength, so that...
Claims
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IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 曹成叶德信皇甫江涛冉立新
Owner ZHEJIANG UNIV