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Conical interdigital DNA double helix bionic left-handed material

A left-handed material, double helix technology, used in electrical components, antennas, etc., can solve the problems of low practical value, complexity, and many adjustment restrictions, and achieve the effect of convenient production and later loading and application.

Inactive Publication Date: 2017-01-04
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These structures are usually more complicated, and there are more adjustment restrictions, so the practical value is not high

Method used

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  • Conical interdigital DNA double helix bionic left-handed material
  • Conical interdigital DNA double helix bionic left-handed material
  • Conical interdigital DNA double helix bionic left-handed material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: see figure 1 , the basic structure of the present invention is a high-performance dielectric substrate covered with a good conductor on one side. Conductor thickness is 0.017mm. On the surface of the good conductor of the dielectric substrate, two pairs of upper and lower crossed symmetrical spiral metal wires are etched, showing a mirror image symmetrical structure, and the upper and lower sides are connected by interdigitated metal rods. The cross-symmetrical spiral metal wires are all composed of circular arcs. The center of the circular arc deviates slightly from the left and right central axes, the distance d from the central axis is 0.5mm, and the distance b from the horizontal axis is 2.4mm. The radius r of the outer arc of the spiral metal wire is 2.6 mm; the inner arc is a concentric structure, and the distance w between the inner and outer arcs is 0.4 mm. On the inside of each pair of intersecting double helixes, an inward interdigitated arm ex...

Embodiment 2

[0042] Example 2: see Figure 9 , on the basis of the original unit structure, this embodiment changes the tapered tail of the interdigitated structure into a circular hole with a radius of r1=0.12mm on the finger arm of the interdigitated capacitor, so as to increase the number of fingers in the interdigitated structure. series inductance. And opening holes in the fingers of the interdigitated capacitor can obviously change the current path in the interdigitated structure, thus changing the electromagnetic properties of the left-handed material. Such as Figure 10 As shown, the dual negative frequency bands of this embodiment are from 10.30 GHz to 12.30 GHz, and the bandwidth is obviously increased.

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Abstract

The invention relates to a conical interdigital DNA double helix bionic left-handed material, and relates to a left-handed material. The conical interdigital DNA double helix bionic left-handed material is provided with a medium substrate, wherein one surface of the medium substrate is covered with a good conductor layer, an upper pair and a lower pair of crossed symmetric helix metal lines are etched on the good conductor layer, the upper and the lower pairs of crossed symmetric helix metal lines are of a mirror symmetric structure, the upper and the lower pairs of crossed symmetric helix metal lines are connected by virtue of an interdigital metal rod, the inner side of each pair of crossed symmetric helix metal lines is provided with an inward interdigital arm extending beyond an interdigital central line, and the ends of the interdigital arms are leveled to one another. By changing an arc radius of the crossed symmetric helix metal lines and the characteristics of the interdigital structural metal rod, the left-handed characteristics of the left-handed material is flexibly controlled. The conical interdigital DNA double helix bionic left-handed material is simple in structure and convenient to process; by virtue of high coupling performance of the crossed symmetric helix metal lines and the interdigital metal rod, in the case of small transmission loss and small unit electrical length, the double negative frequency band and the negative index frequency band are relatively wide, and the application field of the left-handed material is enlarged.

Description

technical field [0001] The invention relates to a left-handed material, in particular to a cone-shaped interdigitated DNA double helix bionic left-handed material. Background technique [0002] Electromagnetic metamaterials (Metamaterials) are artificial composite materials with properties that do not exist in nature [1]. It is assembled from multiple units of composite materials such as metal, plastic, etc. These material units are often arranged periodically, and their size is smaller than the corresponding wavelength. Metamaterials derive their properties not from their base materials, but from their novel structures. Their shape, structure, size, direction, and arrangement make them have the characteristics of controlling electromagnetic waves, and obtain electromagnetic properties far beyond ordinary materials by blocking, absorbing, strengthening, and bending electromagnetic waves [2-3]. As a kind of metamaterials, Left-handed Materials (Left-handed Materials) are a...

Claims

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Application Information

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IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 周建华董明烨游佰强黎江威聂敬
Owner XIAMEN UNIV
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